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Interface java.sql.DatabaseMetaData - JDK 5 Documentation v1.1.8, Java 2 SDK 英文文档

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Interface java.sql.DatabaseMetaData

public interface DatabaseMetaData
This class provides information about the database as a whole.

Many of the methods here return lists of information in ResultSets. You can use the normal ResultSet methods such as getString and getInt to retrieve the data from these ResultSets. If a given form of metadata is not available, these methods should throw a SQLException.

Some of these methods take arguments that are String patterns. These arguments all have names such as fooPattern. Within a pattern String, "%" means match any substring of 0 or more characters, and "_" means match any one character. Only metadata entries matching the search pattern are returned. If a search pattern argument is set to a null ref, it means that argument's criteria should be dropped from the search.

A SQLException will be thrown if a driver does not support a meta data method. In the case of methods that return a ResultSet, either a ResultSet (which may be empty) is returned or a SQLException is thrown.


Variable Index

 o bestRowNotPseudo
BEST ROW PSEUDO_COLUMN - is NOT a pseudo column.
 o bestRowPseudo
BEST ROW PSEUDO_COLUMN - is a pseudo column.
 o bestRowSession
BEST ROW SCOPE - valid for remainder of current session.
 o bestRowTemporary
BEST ROW SCOPE - very temporary, while using row.
 o bestRowTransaction
BEST ROW SCOPE - valid for remainder of current transaction.
 o bestRowUnknown
BEST ROW PSEUDO_COLUMN - may or may not be pseudo column.
 o columnNoNulls
COLUMN NULLABLE - might not allow NULL values.
 o columnNullable
COLUMN NULLABLE - definitely allows NULL values.
 o columnNullableUnknown
COLUMN NULLABLE - nullability unknown.
 o importedKeyCascade
IMPORT KEY UPDATE_RULE and DELETE_RULE - for update, change imported key to agree with primary key update; for delete, delete rows that import a deleted key.
 o importedKeyInitiallyDeferred
IMPORT KEY DEFERRABILITY - see SQL92 for definition
 o importedKeyInitiallyImmediate
IMPORT KEY DEFERRABILITY - see SQL92 for definition
 o importedKeyNoAction
IMPORT KEY UPDATE_RULE and DELETE_RULE - do not allow update or delete of primary key if it has been imported.
 o importedKeyNotDeferrable
IMPORT KEY DEFERRABILITY - see SQL92 for definition
 o importedKeyRestrict
IMPORT KEY UPDATE_RULE and DELETE_RULE - do not allow update or delete of primary key if it has been imported.
 o importedKeySetDefault
IMPORT KEY UPDATE_RULE and DELETE_RULE - change imported key to default values if its primary key has been updated or deleted.
 o importedKeySetNull
IMPORT KEY UPDATE_RULE and DELETE_RULE - change imported key to NULL if its primary key has been updated or deleted.
 o procedureColumnIn
COLUMN_TYPE - IN parameter.
 o procedureColumnInOut
COLUMN_TYPE - INOUT parameter.
 o procedureColumnOut
COLUMN_TYPE - OUT parameter.
 o procedureColumnResult
COLUMN_TYPE - result column in ResultSet.
 o procedureColumnReturn
COLUMN_TYPE - procedure return value.
 o procedureColumnUnknown
COLUMN_TYPE - nobody knows.
 o procedureNoNulls
TYPE NULLABLE - does not allow NULL values.
 o procedureNoResult
PROCEDURE_TYPE - Does not return a result.
 o procedureNullable
TYPE NULLABLE - allows NULL values.
 o procedureNullableUnknown
TYPE NULLABLE - nullability unknown.
 o procedureResultUnknown
PROCEDURE_TYPE - May return a result.
 o procedureReturnsResult
PROCEDURE_TYPE - Returns a result.
 o tableIndexClustered
INDEX INFO TYPE - this identifies a clustered index
 o tableIndexHashed
INDEX INFO TYPE - this identifies a hashed index
 o tableIndexOther
INDEX INFO TYPE - this identifies some other form of index
 o tableIndexStatistic
INDEX INFO TYPE - this identifies table statistics that are returned in conjuction with a table's index descriptions
 o typeNoNulls
TYPE NULLABLE - does not allow NULL values.
 o typeNullable
TYPE NULLABLE - allows NULL values.
 o typeNullableUnknown
TYPE NULLABLE - nullability unknown.
 o typePredBasic
TYPE INFO SEARCHABLE - Supported except for WHERE ..
 o typePredChar
TYPE INFO SEARCHABLE - Only supported with WHERE ..
 o typePredNone
TYPE INFO SEARCHABLE - No support.
 o typeSearchable
TYPE INFO SEARCHABLE - Supported for all WHERE ...
 o versionColumnNotPseudo
VERSION COLUMNS PSEUDO_COLUMN - is NOT a pseudo column.
 o versionColumnPseudo
VERSION COLUMNS PSEUDO_COLUMN - is a pseudo column.
 o versionColumnUnknown
VERSION COLUMNS PSEUDO_COLUMN - may or may not be pseudo column.

Method Index

 o allProceduresAreCallable()
Can all the procedures returned by getProcedures be called by the current user?
 o allTablesAreSelectable()
Can all the tables returned by getTable be SELECTed by the current user?
 o dataDefinitionCausesTransactionCommit()
Does a data definition statement within a transaction force the transaction to commit?
 o dataDefinitionIgnoredInTransactions()
Is a data definition statement within a transaction ignored?
 o doesMaxRowSizeIncludeBlobs()
Did getMaxRowSize() include LONGVARCHAR and LONGVARBINARY blobs?
 o getBestRowIdentifier(String, String, String, int, boolean)
Get a description of a table's optimal set of columns that uniquely identifies a row.
 o getCatalogs()
Get the catalog names available in this database.
 o getCatalogSeparator()
What's the separator between catalog and table name?
 o getCatalogTerm()
What's the database vendor's preferred term for "catalog"?
 o getColumnPrivileges(String, String, String, String)
Get a description of the access rights for a table's columns.
 o getColumns(String, String, String, String)
Get a description of table columns available in a catalog.
 o getCrossReference(String, String, String, String, String, String)
Get a description of the foreign key columns in the foreign key table that reference the primary key columns of the primary key table (describe how one table imports another's key.) This should normally return a single foreign key/primary key pair (most tables only import a foreign key from a table once.) They are ordered by FKTABLE_CAT, FKTABLE_SCHEM, FKTABLE_NAME, and KEY_SEQ.
 o getDatabaseProductName()
What's the name of this database product?
 o getDatabaseProductVersion()
What's the version of this database product?
 o getDefaultTransactionIsolation()
What's the database's default transaction isolation level? The values are defined in java.sql.Connection.
 o getDriverMajorVersion()
What's this JDBC driver's major version number?
 o getDriverMinorVersion()
What's this JDBC driver's minor version number?
 o getDriverName()
What's the name of this JDBC driver?
 o getDriverVersion()
What's the version of this JDBC driver?
 o getExportedKeys(String, String, String)
Get a description of the foreign key columns that reference a table's primary key columns (the foreign keys exported by a table).
 o getExtraNameCharacters()
Get all the "extra" characters that can be used in unquoted identifier names (those beyond a-z, A-Z, 0-9 and _).
 o getIdentifierQuoteString()
What's the string used to quote SQL identifiers? This returns a space " " if identifier quoting isn't supported.
 o getImportedKeys(String, String, String)
Get a description of the primary key columns that are referenced by a table's foreign key columns (the primary keys imported by a table).
 o getIndexInfo(String, String, String, boolean, boolean)
Get a description of a table's indices and statistics.
 o getMaxBinaryLiteralLength()
How many hex characters can you have in an inline binary literal?
 o getMaxCatalogNameLength()
What's the maximum length of a catalog name?
 o getMaxCharLiteralLength()
What's the max length for a character literal?
 o getMaxColumnNameLength()
What's the limit on column name length?
 o getMaxColumnsInGroupBy()
What's the maximum number of columns in a "GROUP BY" clause?
 o getMaxColumnsInIndex()
What's the maximum number of columns allowed in an index?
 o getMaxColumnsInOrderBy()
What's the maximum number of columns in an "ORDER BY" clause?
 o getMaxColumnsInSelect()
What's the maximum number of columns in a "SELECT" list?
 o getMaxColumnsInTable()
What's the maximum number of columns in a table?
 o getMaxConnections()
How many active connections can we have at a time to this database?
 o getMaxCursorNameLength()
What's the maximum cursor name length?
 o getMaxIndexLength()
What's the maximum length of an index (in bytes)?
 o getMaxProcedureNameLength()
What's the maximum length of a procedure name?
 o getMaxRowSize()
What's the maximum length of a single row?
 o getMaxSchemaNameLength()
What's the maximum length allowed for a schema name?
 o getMaxStatementLength()
What's the maximum length of a SQL statement?
 o getMaxStatements()
How many active statements can we have open at one time to this database?
 o getMaxTableNameLength()
What's the maximum length of a table name?
 o getMaxTablesInSelect()
What's the maximum number of tables in a SELECT?
 o getMaxUserNameLength()
What's the maximum length of a user name?
 o getNumericFunctions()
Get a comma separated list of math functions.
 o getPrimaryKeys(String, String, String)
Get a description of a table's primary key columns.
 o getProcedureColumns(String, String, String, String)
Get a description of a catalog's stored procedure parameters and result columns.
 o getProcedures(String, String, String)
Get a description of stored procedures available in a catalog.
 o getProcedureTerm()
What's the database vendor's preferred term for "procedure"?
 o getSchemas()
Get the schema names available in this database.
 o getSchemaTerm()
What's the database vendor's preferred term for "schema"?
 o getSearchStringEscape()
This is the string that can be used to escape '_' or '%' in the string pattern style catalog search parameters.
 o getSQLKeywords()
Get a comma separated list of all a database's SQL keywords that are NOT also SQL92 keywords.
 o getStringFunctions()
Get a comma separated list of string functions.
 o getSystemFunctions()
Get a comma separated list of system functions.
 o getTablePrivileges(String, String, String)
Get a description of the access rights for each table available in a catalog.
 o getTables(String, String, String, String[])
Get a description of tables available in a catalog.
 o getTableTypes()
Get the table types available in this database.
 o getTimeDateFunctions()
Get a comma separated list of time and date functions.
 o getTypeInfo()
Get a description of all the standard SQL types supported by this database.
 o getURL()
What's the url for this database?
 o getUserName()
What's our user name as known to the database?
 o getVersionColumns(String, String, String)
Get a description of a table's columns that are automatically updated when any value in a row is updated.
 o isCatalogAtStart()
Does a catalog appear at the start of a qualified table name? (Otherwise it appears at the end)
 o isReadOnly()
Is the database in read-only mode?
 o nullPlusNonNullIsNull()
Are concatenations between NULL and non-NULL values NULL? A JDBC-Compliant driver always returns true.
 o nullsAreSortedAtEnd()
Are NULL values sorted at the end regardless of sort order?
 o nullsAreSortedAtStart()
Are NULL values sorted at the start regardless of sort order?
 o nullsAreSortedHigh()
Are NULL values sorted high?
 o nullsAreSortedLow()
Are NULL values sorted low?
 o storesLowerCaseIdentifiers()
Does the database treat mixed case unquoted SQL identifiers as case insensitive and store them in lower case?
 o storesLowerCaseQuotedIdentifiers()
Does the database treat mixed case quoted SQL identifiers as case insensitive and store them in lower case?
 o storesMixedCaseIdentifiers()
Does the database treat mixed case unquoted SQL identifiers as case insensitive and store them in mixed case?
 o storesMixedCaseQuotedIdentifiers()
Does the database treat mixed case quoted SQL identifiers as case insensitive and store them in mixed case?
 o storesUpperCaseIdentifiers()
Does the database treat mixed case unquoted SQL identifiers as case insensitive and store them in upper case?
 o storesUpperCaseQuotedIdentifiers()
Does the database treat mixed case quoted SQL identifiers as case insensitive and store them in upper case?
 o supportsAlterTableWithAddColumn()
Is "ALTER TABLE" with add column supported?
 o supportsAlterTableWithDropColumn()
Is "ALTER TABLE" with drop column supported?
 o supportsANSI92EntryLevelSQL()
Is the ANSI92 entry level SQL grammar supported? All JDBC-Compliant drivers must return true.
 o supportsANSI92FullSQL()
Is the ANSI92 full SQL grammar supported?
 o supportsANSI92IntermediateSQL()
Is the ANSI92 intermediate SQL grammar supported?
 o supportsCatalogsInDataManipulation()
Can a catalog name be used in a data manipulation statement?
 o supportsCatalogsInIndexDefinitions()
Can a catalog name be used in an index definition statement?
 o supportsCatalogsInPrivilegeDefinitions()
Can a catalog name be used in a privilege definition statement?
 o supportsCatalogsInProcedureCalls()
Can a catalog name be used in a procedure call statement?
 o supportsCatalogsInTableDefinitions()
Can a catalog name be used in a table definition statement?
 o supportsColumnAliasing()
Is column aliasing supported?

If so, the SQL AS clause can be used to provide names for computed columns or to provide alias names for columns as required.

 o supportsConvert()
Is the CONVERT function between SQL types supported?
 o supportsConvert(int, int)
Is CONVERT between the given SQL types supported?
 o supportsCoreSQLGrammar()
Is the ODBC Core SQL grammar supported?
 o supportsCorrelatedSubqueries()
Are correlated subqueries supported? A JDBC-Compliant driver always returns true.
 o supportsDataDefinitionAndDataManipulationTransactions()
Are both data definition and data manipulation statements within a transaction supported?
 o supportsDataManipulationTransactionsOnly()
Are only data manipulation statements within a transaction supported?
 o supportsDifferentTableCorrelationNames()
If table correlation names are supported, are they restricted to be different from the names of the tables?
 o supportsExpressionsInOrderBy()
Are expressions in "ORDER BY" lists supported?
 o supportsExtendedSQLGrammar()
Is the ODBC Extended SQL grammar supported?
 o supportsFullOuterJoins()
Are full nested outer joins supported?
 o supportsGroupBy()
Is some form of "GROUP BY" clause supported?
 o supportsGroupByBeyondSelect()
Can a "GROUP BY" clause add columns not in the SELECT provided it specifies all the columns in the SELECT?
 o supportsGroupByUnrelated()
Can a "GROUP BY" clause use columns not in the SELECT?
 o supportsIntegrityEnhancementFacility()
Is the SQL Integrity Enhancement Facility supported?
 o supportsLikeEscapeClause()
Is the escape character in "LIKE" clauses supported? A JDBC-Compliant driver always returns true.
 o supportsLimitedOuterJoins()
Is there limited support for outer joins? (This will be true if supportFullOuterJoins is true.)
 o supportsMinimumSQLGrammar()
Is the ODBC Minimum SQL grammar supported? All JDBC-Compliant drivers must return true.
 o supportsMixedCaseIdentifiers()
Does the database treat mixed case unquoted SQL identifiers as case sensitive and as a result store them in mixed case? A JDBC-Compliant driver will always return false.
 o supportsMixedCaseQuotedIdentifiers()
Does the database treat mixed case quoted SQL identifiers as case sensitive and as a result store them in mixed case? A JDBC-Compliant driver will always return true.
 o supportsMultipleResultSets()
Are multiple ResultSets from a single execute supported?
 o supportsMultipleTransactions()
Can we have multiple transactions open at once (on different connections)?
 o supportsNonNullableColumns()
Can columns be defined as non-nullable? A JDBC-Compliant driver always returns true.
 o supportsOpenCursorsAcrossCommit()
Can cursors remain open across commits?
 o supportsOpenCursorsAcrossRollback()
Can cursors remain open across rollbacks?
 o supportsOpenStatementsAcrossCommit()
Can statements remain open across commits?
 o supportsOpenStatementsAcrossRollback()
Can statements remain open across rollbacks?
 o supportsOrderByUnrelated()
Can an "ORDER BY" clause use columns not in the SELECT?
 o supportsOuterJoins()
Is some form of outer join supported?
 o supportsPositionedDelete()
Is positioned DELETE supported?
 o supportsPositionedUpdate()
Is positioned UPDATE supported?
 o supportsSchemasInDataManipulation()
Can a schema name be used in a data manipulation statement?
 o supportsSchemasInIndexDefinitions()
Can a schema name be used in an index definition statement?
 o supportsSchemasInPrivilegeDefinitions()
Can a schema name be used in a privilege definition statement?
 o supportsSchemasInProcedureCalls()
Can a schema name be used in a procedure call statement?
 o supportsSchemasInTableDefinitions()
Can a schema name be used in a table definition statement?
 o supportsSelectForUpdate()
Is SELECT for UPDATE supported?
 o supportsStoredProcedures()
Are stored procedure calls using the stored procedure escape syntax supported?
 o supportsSubqueriesInComparisons()
Are subqueries in comparison expressions supported? A JDBC-Compliant driver always returns true.
 o supportsSubqueriesInExists()
Are subqueries in 'exists' expressions supported? A JDBC-Compliant driver always returns true.
 o supportsSubqueriesInIns()
Are subqueries in 'in' statements supported? A JDBC-Compliant driver always returns true.
 o supportsSubqueriesInQuantifieds()
Are subqueries in quantified expressions supported? A JDBC-Compliant driver always returns true.
 o supportsTableCorrelationNames()
Are table correlation names supported? A JDBC-Compliant driver always returns true.
 o supportsTransactionIsolationLevel(int)
Does the database support the given transaction isolation level?
 o supportsTransactions()
Are transactions supported? If not, commit is a noop and the isolation level is TRANSACTION_NONE.
 o supportsUnion()
Is SQL UNION supported?
 o supportsUnionAll()
Is SQL UNION ALL supported?
 o usesLocalFilePerTable()
Does the database use a file for each table?
 o usesLocalFiles()
Does the database store tables in a local file?

Variables

 o procedureResultUnknown
 public static final int procedureResultUnknown
PROCEDURE_TYPE - May return a result.

 o procedureNoResult
 public static final int procedureNoResult
PROCEDURE_TYPE - Does not return a result.

 o procedureReturnsResult
 public static final int procedureReturnsResult
PROCEDURE_TYPE - Returns a result.

 o procedureColumnUnknown
 public static final int procedureColumnUnknown
COLUMN_TYPE - nobody knows.

 o procedureColumnIn
 public static final int procedureColumnIn
COLUMN_TYPE - IN parameter.

 o procedureColumnInOut
 public static final int procedureColumnInOut
COLUMN_TYPE - INOUT parameter.

 o procedureColumnOut
 public static final int procedureColumnOut
COLUMN_TYPE - OUT parameter.

 o procedureColumnReturn
 public static final int procedureColumnReturn
COLUMN_TYPE - procedure return value.

 o procedureColumnResult
 public static final int procedureColumnResult
COLUMN_TYPE - result column in ResultSet.

 o procedureNoNulls
 public static final int procedureNoNulls
TYPE NULLABLE - does not allow NULL values.

 o procedureNullable
 public static final int procedureNullable
TYPE NULLABLE - allows NULL values.

 o procedureNullableUnknown
 public static final int procedureNullableUnknown
TYPE NULLABLE - nullability unknown.

 o columnNoNulls
 public static final int columnNoNulls
COLUMN NULLABLE - might not allow NULL values.

 o columnNullable
 public static final int columnNullable
COLUMN NULLABLE - definitely allows NULL values.

 o columnNullableUnknown
 public static final int columnNullableUnknown
COLUMN NULLABLE - nullability unknown.

 o bestRowTemporary
 public static final int bestRowTemporary
BEST ROW SCOPE - very temporary, while using row.

 o bestRowTransaction
 public static final int bestRowTransaction
BEST ROW SCOPE - valid for remainder of current transaction.

 o bestRowSession
 public static final int bestRowSession
BEST ROW SCOPE - valid for remainder of current session.

 o bestRowUnknown
 public static final int bestRowUnknown
BEST ROW PSEUDO_COLUMN - may or may not be pseudo column.

 o bestRowNotPseudo
 public static final int bestRowNotPseudo
BEST ROW PSEUDO_COLUMN - is NOT a pseudo column.

 o bestRowPseudo
 public static final int bestRowPseudo
BEST ROW PSEUDO_COLUMN - is a pseudo column.

 o versionColumnUnknown
 public static final int versionColumnUnknown
VERSION COLUMNS PSEUDO_COLUMN - may or may not be pseudo column.

 o versionColumnNotPseudo
 public static final int versionColumnNotPseudo
VERSION COLUMNS PSEUDO_COLUMN - is NOT a pseudo column.

 o versionColumnPseudo
 public static final int versionColumnPseudo
VERSION COLUMNS PSEUDO_COLUMN - is a pseudo column.

 o importedKeyCascade
 public static final int importedKeyCascade
IMPORT KEY UPDATE_RULE and DELETE_RULE - for update, change imported key to agree with primary key update; for delete, delete rows that import a deleted key.

 o importedKeyRestrict
 public static final int importedKeyRestrict
IMPORT KEY UPDATE_RULE and DELETE_RULE - do not allow update or delete of primary key if it has been imported.

 o importedKeySetNull
 public static final int importedKeySetNull
IMPORT KEY UPDATE_RULE and DELETE_RULE - change imported key to NULL if its primary key has been updated or deleted.

 o importedKeyNoAction
 public static final int importedKeyNoAction
IMPORT KEY UPDATE_RULE and DELETE_RULE - do not allow update or delete of primary key if it has been imported.

 o importedKeySetDefault
 public static final int importedKeySetDefault
IMPORT KEY UPDATE_RULE and DELETE_RULE - change imported key to default values if its primary key has been updated or deleted.

 o importedKeyInitiallyDeferred
 public static final int importedKeyInitiallyDeferred
IMPORT KEY DEFERRABILITY - see SQL92 for definition

 o importedKeyInitiallyImmediate
 public static final int importedKeyInitiallyImmediate
IMPORT KEY DEFERRABILITY - see SQL92 for definition

 o importedKeyNotDeferrable
 public static final int importedKeyNotDeferrable
IMPORT KEY DEFERRABILITY - see SQL92 for definition

 o typeNoNulls
 public static final int typeNoNulls
TYPE NULLABLE - does not allow NULL values.

 o typeNullable
 public static final int typeNullable
TYPE NULLABLE - allows NULL values.

 o typeNullableUnknown
 public static final int typeNullableUnknown
TYPE NULLABLE - nullability unknown.

 o typePredNone
 public static final int typePredNone
TYPE INFO SEARCHABLE - No support.

 o typePredChar
 public static final int typePredChar
TYPE INFO SEARCHABLE - Only supported with WHERE .. LIKE.

 o typePredBasic
 public static final int typePredBasic
TYPE INFO SEARCHABLE - Supported except for WHERE .. LIKE.

 o typeSearchable
 public static final int typeSearchable
TYPE INFO SEARCHABLE - Supported for all WHERE ...

 o tableIndexStatistic
 public static final short tableIndexStatistic
INDEX INFO TYPE - this identifies table statistics that are returned in conjuction with a table's index descriptions

 o tableIndexClustered
 public static final short tableIndexClustered
INDEX INFO TYPE - this identifies a clustered index

 o tableIndexHashed
 public static final short tableIndexHashed
INDEX INFO TYPE - this identifies a hashed index

 o tableIndexOther
 public static final short tableIndexOther
INDEX INFO TYPE - this identifies some other form of index

Methods

 o allProceduresAreCallable
 public abstract boolean allProceduresAreCallable() throws SQLException
Can all the procedures returned by getProcedures be called by the current user?

Returns:
true if so
Throws: SQLException
if a database-access error occurs.
 o allTablesAreSelectable
 public abstract boolean allTablesAreSelectable() throws SQLException
Can all the tables returned by getTable be SELECTed by the current user?

Returns:
true if so
Throws: SQLException
if a database-access error occurs.
 o getURL
 public abstract String getURL() throws SQLException
What's the url for this database?

Returns:
the url or null if it can't be generated
Throws: SQLException
if a database-access error occurs.
 o getUserName
 public abstract String getUserName() throws SQLException
What's our user name as known to the database?

Returns:
our database user name
Throws: SQLException
if a database-access error occurs.
 o isReadOnly
 public abstract boolean isReadOnly() throws SQLException
Is the database in read-only mode?

Returns:
true if so
Throws: SQLException
if a database-access error occurs.
 o nullsAreSortedHigh
 public abstract boolean nullsAreSortedHigh() throws SQLException
Are NULL values sorted high?

Returns:
true if so
Throws: SQLException
if a database-access error occurs.
 o nullsAreSortedLow
 public abstract boolean nullsAreSortedLow() throws SQLException
Are NULL values sorted low?

Returns:
true if so
Throws: SQLException
if a database-access error occurs.
 o nullsAreSortedAtStart
 public abstract boolean nullsAreSortedAtStart() throws SQLException
Are NULL values sorted at the start regardless of sort order?

Returns:
true if so
Throws: SQLException
if a database-access error occurs.
 o nullsAreSortedAtEnd
 public abstract boolean nullsAreSortedAtEnd() throws SQLException
Are NULL values sorted at the end regardless of sort order?

Returns:
true if so
Throws: SQLException
if a database-access error occurs.
 o getDatabaseProductName
 public abstract String getDatabaseProductName() throws SQLException
What's the name of this database product?

Returns:
database product name
Throws: SQLException
if a database-access error occurs.
 o getDatabaseProductVersion
 public abstract String getDatabaseProductVersion() throws SQLException
What's the version of this database product?

Returns:
database version
Throws: SQLException
if a database-access error occurs.
 o getDriverName
 public abstract String getDriverName() throws SQLException
What's the name of this JDBC driver?

Returns:
JDBC driver name
Throws: SQLException
if a database-access error occurs.
 o getDriverVersion
 public abstract String getDriverVersion() throws SQLException
What's the version of this JDBC driver?

Returns:
JDBC driver version
Throws: SQLException
if a database-access error occurs.
 o getDriverMajorVersion
 public abstract int getDriverMajorVersion()
What's this JDBC driver's major version number?

Returns:
JDBC driver major version
 o getDriverMinorVersion
 public abstract int getDriverMinorVersion()
What's this JDBC driver's minor version number?

Returns:
JDBC driver minor version number
 o usesLocalFiles
 public abstract boolean usesLocalFiles() throws SQLException
Does the database store tables in a local file?

Returns:
true if so
Throws: SQLException
if a database-access error occurs.
 o usesLocalFilePerTable
 public abstract boolean usesLocalFilePerTable() throws SQLException
Does the database use a file for each table?

Returns:
true if the database uses a local file for each table
Throws: SQLException
if a database-access error occurs.
 o supportsMixedCaseIdentifiers
 public abstract boolean supportsMixedCaseIdentifiers() throws SQLException
Does the database treat mixed case unquoted SQL identifiers as case sensitive and as a result store them in mixed case? A JDBC-Compliant driver will always return false.

Returns:
true if so
Throws: SQLException
if a database-access error occurs.
 o storesUpperCaseIdentifiers
 public abstract boolean storesUpperCaseIdentifiers() throws SQLException
Does the database treat mixed case unquoted SQL identifiers as case insensitive and store them in upper case?

Returns:
true if so
Throws: SQLException
if a database-access error occurs.
 o storesLowerCaseIdentifiers
 public abstract boolean storesLowerCaseIdentifiers() throws SQLException
Does the database treat mixed case unquoted SQL identifiers as case insensitive and store them in lower case?

Returns:
true if so
Throws: SQLException
if a database-access error occurs.
 o storesMixedCaseIdentifiers
 public abstract boolean storesMixedCaseIdentifiers() throws SQLException
Does the database treat mixed case unquoted SQL identifiers as case insensitive and store them in mixed case?

Returns:
true if so
Throws: SQLException
if a database-access error occurs.
 o supportsMixedCaseQuotedIdentifiers
 public abstract boolean supportsMixedCaseQuotedIdentifiers() throws SQLException
Does the database treat mixed case quoted SQL identifiers as case sensitive and as a result store them in mixed case? A JDBC-Compliant driver will always return true.

Returns:
true if so
Throws: SQLException
if a database-access error occurs.
 o storesUpperCaseQuotedIdentifiers
 public abstract boolean storesUpperCaseQuotedIdentifiers() throws SQLException
Does the database treat mixed case quoted SQL identifiers as case insensitive and store them in upper case?

Returns:
true if so
Throws: SQLException
if a database-access error occurs.
 o storesLowerCaseQuotedIdentifiers
 public abstract boolean storesLowerCaseQuotedIdentifiers() throws SQLException
Does the database treat mixed case quoted SQL identifiers as case insensitive and store them in lower case?

Returns:
true if so
Throws: SQLException
if a database-access error occurs.
 o storesMixedCaseQuotedIdentifiers
 public abstract boolean storesMixedCaseQuotedIdentifiers() throws SQLException
Does the database treat mixed case quoted SQL identifiers as case insensitive and store them in mixed case?

Returns:
true if so
Throws: SQLException
if a database-access error occurs.
 o getIdentifierQuoteString
 public abstract String getIdentifierQuoteString() throws SQLException
What's the string used to quote SQL identifiers? This returns a space " " if identifier quoting isn't supported. A JDBC-Compliant driver always uses a double quote character.

Returns:
the quoting string
Throws: SQLException
if a database-access error occurs.
 o getSQLKeywords
 public abstract String getSQLKeywords() throws SQLException
Get a comma separated list of all a database's SQL keywords that are NOT also SQL92 keywords.

Returns:
the list
Throws: SQLException
if a database-access error occurs.
 o getNumericFunctions
 public abstract String getNumericFunctions() throws SQLException
Get a comma separated list of math functions.

Returns:
the list
Throws: SQLException
if a database-access error occurs.
 o getStringFunctions
 public abstract String getStringFunctions() throws SQLException
Get a comma separated list of string functions.

Returns:
the list
Throws: SQLException
if a database-access error occurs.
 o getSystemFunctions
 public abstract String getSystemFunctions() throws SQLException
Get a comma separated list of system functions.

Returns:
the list
Throws: SQLException
if a database-access error occurs.
 o getTimeDateFunctions
 public abstract String getTimeDateFunctions() throws SQLException
Get a comma separated list of time and date functions.

Returns:
the list
Throws: SQLException
if a database-access error occurs.
 o getSearchStringEscape
 public abstract String getSearchStringEscape() throws SQLException
This is the string that can be used to escape '_' or '%' in the string pattern style catalog search parameters.

The '_' character represents any single character.

The '%' character represents any sequence of zero or more characters.

Returns:
the string used to escape wildcard characters
Throws: SQLException
if a database-access error occurs.
 o getExtraNameCharacters
 public abstract String getExtraNameCharacters() throws SQLException
Get all the "extra" characters that can be used in unquoted identifier names (those beyond a-z, A-Z, 0-9 and _).

Returns:
the string containing the extra characters
Throws: SQLException
if a database-access error occurs.
 o supportsAlterTableWithAddColumn
 public abstract boolean supportsAlterTableWithAddColumn() throws SQLException
Is "ALTER TABLE" with add column supported?

Returns:
true if so
Throws: SQLException
if a database-access error occurs.
 o supportsAlterTableWithDropColumn
 public abstract boolean supportsAlterTableWithDropColumn() throws SQLException
Is "ALTER TABLE" with drop column supported?

Returns:
true if so
Throws: SQLException
if a database-access error occurs.
 o supportsColumnAliasing
 public abstract boolean supportsColumnAliasing() throws SQLException
Is column aliasing supported?

If so, the SQL AS clause can be used to provide names for computed columns or to provide alias names for columns as required. A JDBC-Compliant driver always returns true.

Returns:
true if so
Throws: SQLException
if a database-access error occurs.
 o nullPlusNonNullIsNull
 public abstract boolean nullPlusNonNullIsNull() throws SQLException
Are concatenations between NULL and non-NULL values NULL? A JDBC-Compliant driver always returns true.

Returns:
true if so
Throws: SQLException
if a database-access error occurs.
 o supportsConvert
 public abstract boolean supportsConvert() throws SQLException
Is the CONVERT function between SQL types supported?

Returns:
true if so
Throws: SQLException
if a database-access error occurs.
 o supportsConvert
 public abstract boolean supportsConvert(int fromType,
                                         int toType) throws SQLException
Is CONVERT between the given SQL types supported?

Parameters:
fromType - the type to convert from
toType - the type to convert to
Returns:
true if so
Throws: SQLException
if a database-access error occurs.
See Also:
Types
 o supportsTableCorrelationNames
 public abstract boolean supportsTableCorrelationNames() throws SQLException
Are table correlation names supported? A JDBC-Compliant driver always returns true.

Returns:
true if so
Throws: SQLException
if a database-access error occurs.
 o supportsDifferentTableCorrelationNames
 public abstract boolean supportsDifferentTableCorrelationNames() throws SQLException
If table correlation names are supported, are they restricted to be different from the names of the tables?

Returns:
true if so
Throws: SQLException
if a database-access error occurs.
 o supportsExpressionsInOrderBy
 public abstract boolean supportsExpressionsInOrderBy() throws SQLException
Are expressions in "ORDER BY" lists supported?

Returns:
true if so
Throws: SQLException
if a database-access error occurs.
 o supportsOrderByUnrelated
 public abstract boolean supportsOrderByUnrelated() throws SQLException
Can an "ORDER BY" clause use columns not in the SELECT?

Returns:
true if so
Throws: SQLException
if a database-access error occurs.
 o supportsGroupBy
 public abstract boolean supportsGroupBy() throws SQLException
Is some form of "GROUP BY" clause supported?

Returns:
true if so
Throws: SQLException
if a database-access error occurs.
 o supportsGroupByUnrelated
 public abstract boolean supportsGroupByUnrelated() throws SQLException
Can a "GROUP BY" clause use columns not in the SELECT?

Returns:
true if so
Throws: SQLException
if a database-access error occurs.
 o supportsGroupByBeyondSelect
 public abstract boolean supportsGroupByBeyondSelect() throws SQLException
Can a "GROUP BY" clause add columns not in the SELECT provided it specifies all the columns in the SELECT?

Returns:
true if so
Throws: SQLException
if a database-access error occurs.
 o supportsLikeEscapeClause
 public abstract boolean supportsLikeEscapeClause() throws SQLException
Is the escape character in "LIKE" clauses supported? A JDBC-Compliant driver always returns true.

Returns:
true if so
Throws: SQLException
if a database-access error occurs.
 o supportsMultipleResultSets
 public abstract boolean supportsMultipleResultSets() throws SQLException
Are multiple ResultSets from a single execute supported?

Returns:
true if so
Throws: SQLException
if a database-access error occurs.
 o supportsMultipleTransactions
 public abstract boolean supportsMultipleTransactions() throws SQLException
Can we have multiple transactions open at once (on different connections)?

Returns:
true if so
Throws: SQLException
if a database-access error occurs.
 o supportsNonNullableColumns
 public abstract boolean supportsNonNullableColumns() throws SQLException
Can columns be defined as non-nullable? A JDBC-Compliant driver always returns true.

Returns:
true if so
Throws: SQLException
if a database-access error occurs.
 o supportsMinimumSQLGrammar
 public abstract boolean supportsMinimumSQLGrammar() throws SQLException
Is the ODBC Minimum SQL grammar supported? All JDBC-Compliant drivers must return true.

Returns:
true if so
Throws: SQLException
if a database-access error occurs.
 o supportsCoreSQLGrammar
 public abstract boolean supportsCoreSQLGrammar() throws SQLException
Is the ODBC Core SQL grammar supported?

Returns:
true if so
Throws: SQLException
if a database-access error occurs.
 o supportsExtendedSQLGrammar
 public abstract boolean supportsExtendedSQLGrammar() throws SQLException
Is the ODBC Extended SQL grammar supported?

Returns:
true if so
Throws: SQLException
if a database-access error occurs.
 o supportsANSI92EntryLevelSQL
 public abstract boolean supportsANSI92EntryLevelSQL() throws SQLException
Is the ANSI92 entry level SQL grammar supported? All JDBC-Compliant drivers must return true.

Returns:
true if so
Throws: SQLException
if a database-access error occurs.
 o supportsANSI92IntermediateSQL
 public abstract boolean supportsANSI92IntermediateSQL() throws SQLException
Is the ANSI92 intermediate SQL grammar supported?

Returns:
true if so
Throws: SQLException
if a database-access error occurs.
 o supportsANSI92FullSQL
 public abstract boolean supportsANSI92FullSQL() throws SQLException
Is the ANSI92 full SQL grammar supported?

Returns:
true if so
Throws: SQLException
if a database-access error occurs.
 o supportsIntegrityEnhancementFacility
 public abstract boolean supportsIntegrityEnhancementFacility() throws SQLException
Is the SQL Integrity Enhancement Facility supported?

Returns:
true if so
Throws: SQLException
if a database-access error occurs.
 o supportsOuterJoins
 public abstract boolean supportsOuterJoins() throws SQLException
Is some form of outer join supported?

Returns:
true if so
Throws: SQLException
if a database-access error occurs.
 o supportsFullOuterJoins
 public abstract boolean supportsFullOuterJoins() throws SQLException
Are full nested outer joins supported?

Returns:
true if so
Throws: SQLException
if a database-access error occurs.
 o supportsLimitedOuterJoins
 public abstract boolean supportsLimitedOuterJoins() throws SQLException
Is there limited support for outer joins? (This will be true if supportFullOuterJoins is true.)

Returns:
true if so
Throws: SQLException
if a database-access error occurs.
 o getSchemaTerm
 public abstract String getSchemaTerm() throws SQLException
What's the database vendor's preferred term for "schema"?

Returns:
the vendor term
Throws: SQLException
if a database-access error occurs.
 o getProcedureTerm
 public abstract String getProcedureTerm() throws SQLException
What's the database vendor's preferred term for "procedure"?

Returns:
the vendor term
Throws: SQLException
if a database-access error occurs.
 o getCatalogTerm
 public abstract String getCatalogTerm() throws SQLException
What's the database vendor's preferred term for "catalog"?

Returns:
the vendor term
Throws: SQLException
if a database-access error occurs.
 o isCatalogAtStart
 public abstract boolean isCatalogAtStart() throws SQLException
Does a catalog appear at the start of a qualified table name? (Otherwise it appears at the end)

Returns:
true if it appears at the start
Throws: SQLException
if a database-access error occurs.
 o getCatalogSeparator
 public abstract String getCatalogSeparator() throws SQLException
What's the separator between catalog and table name?

Returns:
the separator string
Throws: SQLException
if a database-access error occurs.
 o supportsSchemasInDataManipulation
 public abstract boolean supportsSchemasInDataManipulation() throws SQLException
Can a schema name be used in a data manipulation statement?

Returns:
true if so
Throws: SQLException
if a database-access error occurs.
 o supportsSchemasInProcedureCalls
 public abstract boolean supportsSchemasInProcedureCalls() throws SQLException
Can a schema name be used in a procedure call statement?

Returns:
true if so
Throws: SQLException
if a database-access error occurs.
 o supportsSchemasInTableDefinitions
 public abstract boolean supportsSchemasInTableDefinitions() throws SQLException
Can a schema name be used in a table definition statement?

Returns:
true if so
Throws: SQLException
if a database-access error occurs.
 o supportsSchemasInIndexDefinitions
 public abstract boolean supportsSchemasInIndexDefinitions() throws SQLException
Can a schema name be used in an index definition statement?

Returns:
true if so
Throws: SQLException
if a database-access error occurs.
 o supportsSchemasInPrivilegeDefinitions
 public abstract boolean supportsSchemasInPrivilegeDefinitions() throws SQLException
Can a schema name be used in a privilege definition statement?

Returns:
true if so
Throws: SQLException
if a database-access error occurs.
 o supportsCatalogsInDataManipulation
 public abstract boolean supportsCatalogsInDataManipulation() throws SQLException
Can a catalog name be used in a data manipulation statement?

Returns:
true if so
Throws: SQLException
if a database-access error occurs.
 o supportsCatalogsInProcedureCalls
 public abstract boolean supportsCatalogsInProcedureCalls() throws SQLException
Can a catalog name be used in a procedure call statement?

Returns:
true if so
Throws: SQLException
if a database-access error occurs.
 o supportsCatalogsInTableDefinitions
 public abstract boolean supportsCatalogsInTableDefinitions() throws SQLException
Can a catalog name be used in a table definition statement?

Returns:
true if so
Throws: SQLException
if a database-access error occurs.
 o supportsCatalogsInIndexDefinitions
 public abstract boolean supportsCatalogsInIndexDefinitions() throws SQLException
Can a catalog name be used in an index definition statement?

Returns:
true if so
Throws: SQLException
if a database-access error occurs.
 o supportsCatalogsInPrivilegeDefinitions
 public abstract boolean supportsCatalogsInPrivilegeDefinitions() throws SQLException
Can a catalog name be used in a privilege definition statement?

Returns:
true if so
Throws: SQLException
if a database-access error occurs.
 o supportsPositionedDelete
 public abstract boolean supportsPositionedDelete() throws SQLException
Is positioned DELETE supported?

Returns:
true if so
Throws: SQLException
if a database-access error occurs.
 o supportsPositionedUpdate
 public abstract boolean supportsPositionedUpdate() throws SQLException
Is positioned UPDATE supported?

Returns:
true if so
Throws: SQLException
if a database-access error occurs.
 o supportsSelectForUpdate
 public abstract boolean supportsSelectForUpdate() throws SQLException
Is SELECT for UPDATE supported?

Returns:
true if so
Throws: SQLException
if a database-access error occurs.
 o supportsStoredProcedures
 public abstract boolean supportsStoredProcedures() throws SQLException
Are stored procedure calls using the stored procedure escape syntax supported?

Returns:
true if so
Throws: SQLException
if a database-access error occurs.
 o supportsSubqueriesInComparisons
 public abstract boolean supportsSubqueriesInComparisons() throws SQLException
Are subqueries in comparison expressions supported? A JDBC-Compliant driver always returns true.

Returns:
true if so
Throws: SQLException
if a database-access error occurs.
 o supportsSubqueriesInExists
 public abstract boolean supportsSubqueriesInExists() throws SQLException
Are subqueries in 'exists' expressions supported? A JDBC-Compliant driver always returns true.

Returns:
true if so
Throws: SQLException
if a database-access error occurs.
 o supportsSubqueriesInIns
 public abstract boolean supportsSubqueriesInIns() throws SQLException
Are subqueries in 'in' statements supported? A JDBC-Compliant driver always returns true.

Returns:
true if so
Throws: SQLException
if a database-access error occurs.
 o supportsSubqueriesInQuantifieds
 public abstract boolean supportsSubqueriesInQuantifieds() throws SQLException
Are subqueries in quantified expressions supported? A JDBC-Compliant driver always returns true.

Returns:
true if so
Throws: SQLException
if a database-access error occurs.
 o supportsCorrelatedSubqueries
 public abstract boolean supportsCorrelatedSubqueries() throws SQLException
Are correlated subqueries supported? A JDBC-Compliant driver always returns true.

Returns:
true if so
Throws: SQLException
if a database-access error occurs.
 o supportsUnion
 public abstract boolean supportsUnion() throws SQLException
Is SQL UNION supported?

Returns:
true if so
Throws: SQLException
if a database-access error occurs.
 o supportsUnionAll
 public abstract boolean supportsUnionAll() throws SQLException
Is SQL UNION ALL supported?

Returns:
true if so
Throws: SQLException
if a database-access error occurs.
 o supportsOpenCursorsAcrossCommit
 public abstract boolean supportsOpenCursorsAcrossCommit() throws SQLException
Can cursors remain open across commits?

Returns:
true if cursors always remain open; false if they might not remain open
Throws: SQLException
if a database-access error occurs.
 o supportsOpenCursorsAcrossRollback
 public abstract boolean supportsOpenCursorsAcrossRollback() throws SQLException
Can cursors remain open across rollbacks?

Returns:
true if cursors always remain open; false if they might not remain open
Throws: SQLException
if a database-access error occurs.
 o supportsOpenStatementsAcrossCommit
 public abstract boolean supportsOpenStatementsAcrossCommit() throws SQLException
Can statements remain open across commits?

Returns:
true if statements always remain open; false if they might not remain open
Throws: SQLException
if a database-access error occurs.
 o supportsOpenStatementsAcrossRollback
 public abstract boolean supportsOpenStatementsAcrossRollback() throws SQLException
Can statements remain open across rollbacks?

Returns:
true if statements always remain open; false if they might not remain open
Throws: SQLException
if a database-access error occurs.
 o getMaxBinaryLiteralLength
 public abstract int getMaxBinaryLiteralLength() throws SQLException
How many hex characters can you have in an inline binary literal?

Returns:
max literal length
Throws: SQLException
if a database-access error occurs.
 o getMaxCharLiteralLength
 public abstract int getMaxCharLiteralLength() throws SQLException
What's the max length for a character literal?

Returns:
max literal length
Throws: SQLException
if a database-access error occurs.
 o getMaxColumnNameLength
 public abstract int getMaxColumnNameLength() throws SQLException
What's the limit on column name length?

Returns:
max literal length
Throws: SQLException
if a database-access error occurs.
 o getMaxColumnsInGroupBy
 public abstract int getMaxColumnsInGroupBy() throws SQLException
What's the maximum number of columns in a "GROUP BY" clause?

Returns:
max number of columns
Throws: SQLException
if a database-access error occurs.
 o getMaxColumnsInIndex
 public abstract int getMaxColumnsInIndex() throws SQLException
What's the maximum number of columns allowed in an index?

Returns:
max columns
Throws: SQLException
if a database-access error occurs.
 o getMaxColumnsInOrderBy
 public abstract int getMaxColumnsInOrderBy() throws SQLException
What's the maximum number of columns in an "ORDER BY" clause?

Returns:
max columns
Throws: SQLException
if a database-access error occurs.
 o getMaxColumnsInSelect
 public abstract int getMaxColumnsInSelect() throws SQLException
What's the maximum number of columns in a "SELECT" list?

Returns:
max columns
Throws: SQLException
if a database-access error occurs.
 o getMaxColumnsInTable
 public abstract int getMaxColumnsInTable() throws SQLException
What's the maximum number of columns in a table?

Returns:
max columns
Throws: SQLException
if a database-access error occurs.
 o getMaxConnections
 public abstract int getMaxConnections() throws SQLException
How many active connections can we have at a time to this database?

Returns:
max connections
Throws: SQLException
if a database-access error occurs.
 o getMaxCursorNameLength
 public abstract int getMaxCursorNameLength() throws SQLException
What's the maximum cursor name length?

Returns:
max cursor name length in bytes
Throws: SQLException
if a database-access error occurs.
 o getMaxIndexLength
 public abstract int getMaxIndexLength() throws SQLException
What's the maximum length of an index (in bytes)?

Returns:
max index length in bytes
Throws: SQLException
if a database-access error occurs.
 o getMaxSchemaNameLength
 public abstract int getMaxSchemaNameLength() throws SQLException
What's the maximum length allowed for a schema name?

Returns:
max name length in bytes
Throws: SQLException
if a database-access error occurs.
 o getMaxProcedureNameLength
 public abstract int getMaxProcedureNameLength() throws SQLException
What's the maximum length of a procedure name?

Returns:
max name length in bytes
Throws: SQLException
if a database-access error occurs.
 o getMaxCatalogNameLength
 public abstract int getMaxCatalogNameLength() throws SQLException
What's the maximum length of a catalog name?

Returns:
max name length in bytes
Throws: SQLException
if a database-access error occurs.
 o getMaxRowSize
 public abstract int getMaxRowSize() throws SQLException
What's the maximum length of a single row?

Returns:
max row size in bytes
Throws: SQLException
if a database-access error occurs.
 o doesMaxRowSizeIncludeBlobs
 public abstract boolean doesMaxRowSizeIncludeBlobs() throws SQLException
Did getMaxRowSize() include LONGVARCHAR and LONGVARBINARY blobs?

Returns:
true if so
Throws: SQLException
if a database-access error occurs.
 o getMaxStatementLength
 public abstract int getMaxStatementLength() throws SQLException
What's the maximum length of a SQL statement?

Returns:
max length in bytes
Throws: SQLException
if a database-access error occurs.
 o getMaxStatements
 public abstract int getMaxStatements() throws SQLException
How many active statements can we have open at one time to this database?

Returns:
the maximum
Throws: SQLException
if a database-access error occurs.
 o getMaxTableNameLength
 public abstract int getMaxTableNameLength() throws SQLException
What's the maximum length of a table name?

Returns:
max name length in bytes
Throws: SQLException
if a database-access error occurs.
 o getMaxTablesInSelect
 public abstract int getMaxTablesInSelect() throws SQLException
What's the maximum number of tables in a SELECT?

Returns:
the maximum
Throws: SQLException
if a database-access error occurs.
 o getMaxUserNameLength
 public abstract int getMaxUserNameLength() throws SQLException
What's the maximum length of a user name?

Returns:
max name length in bytes
Throws: SQLException
if a database-access error occurs.
 o getDefaultTransactionIsolation
 public abstract int getDefaultTransactionIsolation() throws SQLException
What's the database's default transaction isolation level? The values are defined in java.sql.Connection.

Returns:
the default isolation level
Throws: SQLException
if a database-access error occurs.
See Also:
Connection
 o supportsTransactions
 public abstract boolean supportsTransactions() throws SQLException
Are transactions supported? If not, commit is a noop and the isolation level is TRANSACTION_NONE.

Returns:
true if transactions are supported
Throws: SQLException
if a database-access error occurs.
 o supportsTransactionIsolationLevel
 public abstract boolean supportsTransactionIsolationLevel(int level) throws SQLException
Does the database support the given transaction isolation level?

Parameters:
level - the values are defined in java.sql.Connection
Returns:
true if so
Throws: SQLException
if a database-access error occurs.
See Also:
Connection
 o supportsDataDefinitionAndDataManipulationTransactions
 public abstract boolean supportsDataDefinitionAndDataManipulationTransactions() throws SQLException
Are both data definition and data manipulation statements within a transaction supported?

Returns:
true if so
Throws: SQLException
if a database-access error occurs.
 o supportsDataManipulationTransactionsOnly
 public abstract boolean supportsDataManipulationTransactionsOnly() throws SQLException
Are only data manipulation statements within a transaction supported?

Returns:
true if so
Throws: SQLException
if a database-access error occurs.
 o dataDefinitionCausesTransactionCommit
 public abstract boolean dataDefinitionCausesTransactionCommit() throws SQLException
Does a data definition statement within a transaction force the transaction to commit?

Returns:
true if so
Throws: SQLException
if a database-access error occurs.
 o dataDefinitionIgnoredInTransactions
 public abstract boolean dataDefinitionIgnoredInTransactions() throws SQLException
Is a data definition statement within a transaction ignored?

Returns:
true if so
Throws: SQLException
if a database-access error occurs.
 o getProcedures
 public abstract ResultSet getProcedures(String catalog,
                                         String schemaPattern,
                                         String procedureNamePattern) throws SQLException
Get a description of stored procedures available in a catalog.

Only procedure descriptions matching the schema and procedure name criteria are returned. They are ordered by PROCEDURE_SCHEM, and PROCEDURE_NAME.

Each procedure description has the the following columns:

  1. PROCEDURE_CAT String => procedure catalog (may be null)
  2. PROCEDURE_SCHEM String => procedure schema (may be null)
  3. PROCEDURE_NAME String => procedure name
  4. reserved for future use
  5. reserved for future use
  6. reserved for future use
  7. REMARKS String => explanatory comment on the procedure
  8. PROCEDURE_TYPE short => kind of procedure:
    • procedureResultUnknown - May return a result
    • procedureNoResult - Does not return a result
    • procedureReturnsResult - Returns a result

Parameters:
catalog - a catalog name; "" retrieves those without a catalog; null means drop catalog name from the selection criteria
schemaPattern - a schema name pattern; "" retrieves those without a schema
procedureNamePattern - a procedure name pattern
Returns:
ResultSet - each row is a procedure description
Throws: SQLException
if a database-access error occurs.
See Also:
getSearchStringEscape
 o getProcedureColumns
 public abstract ResultSet getProcedureColumns(String catalog,
                                               String schemaPattern,
                                               String procedureNamePattern,
                                               String columnNamePattern) throws SQLException
Get a description of a catalog's stored procedure parameters and result columns.

Only descriptions matching the schema, procedure and parameter name criteria are returned. They are ordered by PROCEDURE_SCHEM and PROCEDURE_NAME. Within this, the return value, if any, is first. Next are the parameter descriptions in call order. The column descriptions follow in column number order.

Each row in the ResultSet is a parameter description or column description with the following fields:

  1. PROCEDURE_CAT String => procedure catalog (may be null)
  2. PROCEDURE_SCHEM String => procedure schema (may be null)
  3. PROCEDURE_NAME String => procedure name
  4. COLUMN_NAME String => column/parameter name
  5. COLUMN_TYPE Short => kind of column/parameter:
    • procedureColumnUnknown - nobody knows
    • procedureColumnIn - IN parameter
    • procedureColumnInOut - INOUT parameter
    • procedureColumnOut - OUT parameter
    • procedureColumnReturn - procedure return value
    • procedureColumnResult - result column in ResultSet
  6. DATA_TYPE short => SQL type from java.sql.Types
  7. TYPE_NAME String => SQL type name
  8. PRECISION int => precision
  9. LENGTH int => length in bytes of data
  10. SCALE short => scale
  11. RADIX short => radix
  12. NULLABLE short => can it contain NULL?
    • procedureNoNulls - does not allow NULL values
    • procedureNullable - allows NULL values
    • procedureNullableUnknown - nullability unknown
  13. REMARKS String => comment describing parameter/column

Note: Some databases may not return the column descriptions for a procedure. Additional columns beyond REMARKS can be defined by the database.

Parameters:
catalog - a catalog name; "" retrieves those without a catalog; null means drop catalog name from the selection criteria
schemaPattern - a schema name pattern; "" retrieves those without a schema
procedureNamePattern - a procedure name pattern
columnNamePattern - a column name pattern
Returns:
ResultSet - each row is a stored procedure parameter or column description
Throws: SQLException
if a database-access error occurs.
See Also:
getSearchStringEscape
 o getTables
 public abstract ResultSet getTables(String catalog,
                                     String schemaPattern,
                                     String tableNamePattern,
                                     String types[]) throws SQLException
Get a description of tables available in a catalog.

Only table descriptions matching the catalog, schema, table name and type criteria are returned. They are ordered by TABLE_TYPE, TABLE_SCHEM and TABLE_NAME.

Each table description has the following columns:

  1. TABLE_CAT String => table catalog (may be null)
  2. TABLE_SCHEM String => table schema (may be null)
  3. TABLE_NAME String => table name
  4. TABLE_TYPE String => table type. Typical types are "TABLE", "VIEW", "SYSTEM TABLE", "GLOBAL TEMPORARY", "LOCAL TEMPORARY", "ALIAS", "SYNONYM".
  5. REMARKS String => explanatory comment on the table

Note: Some databases may not return information for all tables.

Parameters:
catalog - a catalog name; "" retrieves those without a catalog; null means drop catalog name from the selection criteria
schemaPattern - a schema name pattern; "" retrieves those without a schema
tableNamePattern - a table name pattern
types - a list of table types to include; null returns all types
Returns:
ResultSet - each row is a table description
Throws: SQLException
if a database-access error occurs.
See Also:
getSearchStringEscape
 o getSchemas
 public abstract ResultSet getSchemas() throws SQLException
Get the schema names available in this database. The results are ordered by schema name.

The schema column is:

  1. TABLE_SCHEM String => schema name

Returns:
ResultSet - each row has a single String column that is a schema name
Throws: SQLException
if a database-access error occurs.
 o getCatalogs
 public abstract ResultSet getCatalogs() throws SQLException
Get the catalog names available in this database. The results are ordered by catalog name.

The catalog column is:

  1. TABLE_CAT String => catalog name

Returns:
ResultSet - each row has a single String column that is a catalog name
Throws: SQLException
if a database-access error occurs.
 o getTableTypes
 public abstract ResultSet getTableTypes() throws SQLException
Get the table types available in this database. The results are ordered by table type.

The table type is:

  1. TABLE_TYPE String => table type. Typical types are "TABLE", "VIEW", "SYSTEM TABLE", "GLOBAL TEMPORARY", "LOCAL TEMPORARY", "ALIAS", "SYNONYM".

Returns:
ResultSet - each row has a single String column that is a table type
Throws: SQLException
if a database-access error occurs.
 o getColumns
 public abstract ResultSet getColumns(String catalog,
                                      String schemaPattern,
                                      String tableNamePattern,
                                      String columnNamePattern) throws SQLException
Get a description of table columns available in a catalog.

Only column descriptions matching the catalog, schema, table and column name criteria are returned. They are ordered by TABLE_SCHEM, TABLE_NAME and ORDINAL_POSITION.

Each column description has the following columns:

  1. TABLE_CAT String => table catalog (may be null)
  2. TABLE_SCHEM String => table schema (may be null)
  3. TABLE_NAME String => table name
  4. COLUMN_NAME String => column name
  5. DATA_TYPE short => SQL type from java.sql.Types
  6. TYPE_NAME String => Data source dependent type name
  7. COLUMN_SIZE int => column size. For char or date types this is the maximum number of characters, for numeric or decimal types this is precision.
  8. BUFFER_LENGTH is not used.
  9. DECIMAL_DIGITS int => the number of fractional digits
  10. NUM_PREC_RADIX int => Radix (typically either 10 or 2)
  11. NULLABLE int => is NULL allowed?
    • columnNoNulls - might not allow NULL values
    • columnNullable - definitely allows NULL values
    • columnNullableUnknown - nullability unknown
  12. REMARKS String => comment describing column (may be null)
  13. COLUMN_DEF String => default value (may be null)
  14. SQL_DATA_TYPE int => unused
  15. SQL_DATETIME_SUB int => unused
  16. CHAR_OCTET_LENGTH int => for char types the maximum number of bytes in the column
  17. ORDINAL_POSITION int => index of column in table (starting at 1)
  18. IS_NULLABLE String => "NO" means column definitely does not allow NULL values; "YES" means the column might allow NULL values. An empty string means nobody knows.

Parameters:
catalog - a catalog name; "" retrieves those without a catalog; null means drop catalog name from the selection criteria
schemaPattern - a schema name pattern; "" retrieves those without a schema
tableNamePattern - a table name pattern
columnNamePattern - a column name pattern
Returns:
ResultSet - each row is a column description
Throws: SQLException
if a database-access error occurs.
See Also:
getSearchStringEscape
 o getColumnPrivileges
 public abstract ResultSet getColumnPrivileges(String catalog,
                                               String schema,
                                               String table,
                                               String columnNamePattern) throws SQLException
Get a description of the access rights for a table's columns.

Only privileges matching the column name criteria are returned. They are ordered by COLUMN_NAME and PRIVILEGE.

Each privilige description has the following columns:

  1. TABLE_CAT String => table catalog (may be null)
  2. TABLE_SCHEM String => table schema (may be null)
  3. TABLE_NAME String => table name
  4. COLUMN_NAME String => column name
  5. GRANTOR => grantor of access (may be null)
  6. GRANTEE String => grantee of access
  7. PRIVILEGE String => name of access (SELECT, INSERT, UPDATE, REFRENCES, ...)
  8. IS_GRANTABLE String => "YES" if grantee is permitted to grant to others; "NO" if not; null if unknown

Parameters:
catalog - a catalog name; "" retrieves those without a catalog; null means drop catalog name from the selection criteria
schema - a schema name; "" retrieves those without a schema
table - a table name
columnNamePattern - a column name pattern
Returns:
ResultSet - each row is a column privilege description
Throws: SQLException
if a database-access error occurs.
See Also:
getSearchStringEscape
 o getTablePrivileges
 public abstract ResultSet getTablePrivileges(String catalog,
                                              String schemaPattern,
                                              String tableNamePattern) throws SQLException
Get a description of the access rights for each table available in a catalog. Note that a table privilege applies to one or more columns in the table. It would be wrong to assume that this priviledge applies to all columns (this may be true for some systems but is not true for all.)

Only privileges matching the schema and table name criteria are returned. They are ordered by TABLE_SCHEM, TABLE_NAME, and PRIVILEGE.

Each privilige description has the following columns:

  1. TABLE_CAT String => table catalog (may be null)
  2. TABLE_SCHEM String => table schema (may be null)
  3. TABLE_NAME String => table name
  4. GRANTOR => grantor of access (may be null)
  5. GRANTEE String => grantee of access
  6. PRIVILEGE String => name of access (SELECT, INSERT, UPDATE, REFRENCES, ...)
  7. IS_GRANTABLE String => "YES" if grantee is permitted to grant to others; "NO" if not; null if unknown

Parameters:
catalog - a catalog name; "" retrieves those without a catalog; null means drop catalog name from the selection criteria
schemaPattern - a schema name pattern; "" retrieves those without a schema
tableNamePattern - a table name pattern
Returns:
ResultSet - each row is a table privilege description
Throws: SQLException
if a database-access error occurs.
See Also:
getSearchStringEscape
 o getBestRowIdentifier
 public abstract ResultSet getBestRowIdentifier(String catalog,
                                                String schema,
                                                String table,
                                                int scope,
                                                boolean nullable) throws SQLException
Get a description of a table's optimal set of columns that uniquely identifies a row. They are ordered by SCOPE.

Each column description has the following columns:

  1. SCOPE short => actual scope of result
    • bestRowTemporary - very temporary, while using row
    • bestRowTransaction - valid for remainder of current transaction
    • bestRowSession - valid for remainder of current session
  2. COLUMN_NAME String => column name
  3. DATA_TYPE short => SQL data type from java.sql.Types
  4. TYPE_NAME String => Data source dependent type name
  5. COLUMN_SIZE int => precision
  6. BUFFER_LENGTH int => not used
  7. DECIMAL_DIGITS short => scale
  8. PSEUDO_COLUMN short => is this a pseudo column like an Oracle ROWID
    • bestRowUnknown - may or may not be pseudo column
    • bestRowNotPseudo - is NOT a pseudo column
    • bestRowPseudo - is a pseudo column

Parameters:
catalog - a catalog name; "" retrieves those without a catalog; null means drop catalog name from the selection criteria
schema - a schema name; "" retrieves those without a schema
table - a table name
scope - the scope of interest; use same values as SCOPE
nullable - include columns that are nullable?
Returns:
ResultSet - each row is a column description
Throws: SQLException
if a database-access error occurs.
 o getVersionColumns
 public abstract ResultSet getVersionColumns(String catalog,
                                             String schema,
                                             String table) throws SQLException
Get a description of a table's columns that are automatically updated when any value in a row is updated. They are unordered.

Each column description has the following columns:

  1. SCOPE short => is not used
  2. COLUMN_NAME String => column name
  3. DATA_TYPE short => SQL data type from java.sql.Types
  4. TYPE_NAME String => Data source dependent type name
  5. COLUMN_SIZE int => precision
  6. BUFFER_LENGTH int => length of column value in bytes
  7. DECIMAL_DIGITS short => scale
  8. PSEUDO_COLUMN short => is this a pseudo column like an Oracle ROWID
    • versionColumnUnknown - may or may not be pseudo column
    • versionColumnNotPseudo - is NOT a pseudo column
    • versionColumnPseudo - is a pseudo column

Parameters:
catalog - a catalog name; "" retrieves those without a catalog; null means drop catalog name from the selection criteria
schema - a schema name; "" retrieves those without a schema
table - a table name
Returns:
ResultSet - each row is a column description
Throws: SQLException
if a database-access error occurs.
 o getPrimaryKeys
 public abstract ResultSet getPrimaryKeys(String catalog,
                                          String schema,
                                          String table) throws SQLException
Get a description of a table's primary key columns. They are ordered by COLUMN_NAME.

Each primary key column description has the following columns:

  1. TABLE_CAT String => table catalog (may be null)
  2. TABLE_SCHEM String => table schema (may be null)
  3. TABLE_NAME String => table name
  4. COLUMN_NAME String => column name
  5. KEY_SEQ short => sequence number within primary key
  6. PK_NAME String => primary key name (may be null)

Parameters:
catalog - a catalog name; "" retrieves those without a catalog; null means drop catalog name from the selection criteria
schema - a schema name pattern; "" retrieves those without a schema
table - a table name
Returns:
ResultSet - each row is a primary key column description
Throws: SQLException
if a database-access error occurs.
 o getImportedKeys
 public abstract ResultSet getImportedKeys(String catalog,
                                           String schema,
                                           String table) throws SQLException
Get a description of the primary key columns that are referenced by a table's foreign key columns (the primary keys imported by a table). They are ordered by PKTABLE_CAT, PKTABLE_SCHEM, PKTABLE_NAME, and KEY_SEQ.

Each primary key column description has the following columns:

  1. PKTABLE_CAT String => primary key table catalog being imported (may be null)
  2. PKTABLE_SCHEM String => primary key table schema being imported (may be null)
  3. PKTABLE_NAME String => primary key table name being imported
  4. PKCOLUMN_NAME String => primary key column name being imported
  5. FKTABLE_CAT String => foreign key table catalog (may be null)
  6. FKTABLE_SCHEM String => foreign key table schema (may be null)
  7. FKTABLE_NAME String => foreign key table name
  8. FKCOLUMN_NAME String => foreign key column name
  9. KEY_SEQ short => sequence number within foreign key
  10. UPDATE_RULE short => What happens to foreign key when primary is updated:
    • importedNoAction - do not allow update of primary key if it has been imported
    • importedKeyCascade - change imported key to agree with primary key update
    • importedKeySetNull - change imported key to NULL if its primary key has been updated
    • importedKeySetDefault - change imported key to default values if its primary key has been updated
    • importedKeyRestrict - same as importedKeyNoAction (for ODBC 2.x compatibility)
  11. DELETE_RULE short => What happens to the foreign key when primary is deleted.
    • importedKeyNoAction - do not allow delete of primary key if it has been imported
    • importedKeyCascade - delete rows that import a deleted key
    • importedKeySetNull - change imported key to NULL if its primary key has been deleted
    • importedKeyRestrict - same as importedKeyNoAction (for ODBC 2.x compatibility)
    • importedKeySetDefault - change imported key to default if its primary key has been deleted
  12. FK_NAME String => foreign key name (may be null)
  13. PK_NAME String => primary key name (may be null)
  14. DEFERRABILITY short => can the evaluation of foreign key constraints be deferred until commit
    • importedKeyInitiallyDeferred - see SQL92 for definition
    • importedKeyInitiallyImmediate - see SQL92 for definition
    • importedKeyNotDeferrable - see SQL92 for definition

Parameters:
catalog - a catalog name; "" retrieves those without a catalog; null means drop catalog name from the selection criteria
schema - a schema name pattern; "" retrieves those without a schema
table - a table name
Returns:
ResultSet - each row is a primary key column description
Throws: SQLException
if a database-access error occurs.
See Also:
getExportedKeys
 o getExportedKeys
 public abstract ResultSet getExportedKeys(String catalog,
                                           String schema,
                                           String table) throws SQLException
Get a description of the foreign key columns that reference a table's primary key columns (the foreign keys exported by a table). They are ordered by FKTABLE_CAT, FKTABLE_SCHEM, FKTABLE_NAME, and KEY_SEQ.

Each foreign key column description has the following columns:

  1. PKTABLE_CAT String => primary key table catalog (may be null)
  2. PKTABLE_SCHEM String => primary key table schema (may be null)
  3. PKTABLE_NAME String => primary key table name
  4. PKCOLUMN_NAME String => primary key column name
  5. FKTABLE_CAT String => foreign key table catalog (may be null) being exported (may be null)
  6. FKTABLE_SCHEM String => foreign key table schema (may be null) being exported (may be null)
  7. FKTABLE_NAME String => foreign key table name being exported
  8. FKCOLUMN_NAME String => foreign key column name being exported
  9. KEY_SEQ short => sequence number within foreign key
  10. UPDATE_RULE short => What happens to foreign key when primary is updated:
    • importedNoAction - do not allow update of primary key if it has been imported
    • importedKeyCascade - change imported key to agree with primary key update
    • importedKeySetNull - change imported key to NULL if its primary key has been updated
    • importedKeySetDefault - change imported key to default values if its primary key has been updated
    • importedKeyRestrict - same as importedKeyNoAction (for ODBC 2.x compatibility)
  11. DELETE_RULE short => What happens to the foreign key when primary is deleted.
    • importedKeyNoAction - do not allow delete of primary key if it has been imported
    • importedKeyCascade - delete rows that import a deleted key
    • importedKeySetNull - change imported key to NULL if its primary key has been deleted
    • importedKeyRestrict - same as importedKeyNoAction (for ODBC 2.x compatibility)
    • importedKeySetDefault - change imported key to default if its primary key has been deleted
  12. FK_NAME String => foreign key name (may be null)
  13. PK_NAME String => primary key name (may be null)
  14. DEFERRABILITY short => can the evaluation of foreign key constraints be deferred until commit
    • importedKeyInitiallyDeferred - see SQL92 for definition
    • importedKeyInitiallyImmediate - see SQL92 for definition
    • importedKeyNotDeferrable - see SQL92 for definition

Parameters:
catalog - a catalog name; "" retrieves those without a catalog; null means drop catalog name from the selection criteria
schema - a schema name pattern; "" retrieves those without a schema
table - a table name
Returns:
ResultSet - each row is a foreign key column description
Throws: SQLException
if a database-access error occurs.
See Also:
getImportedKeys
 o getCrossReference
 public abstract ResultSet getCrossReference(String primaryCatalog,
                                             String primarySchema,
                                             String primaryTable,
                                             String foreignCatalog,
                                             String foreignSchema,
                                             String foreignTable) throws SQLException
Get a description of the foreign key columns in the foreign key table that reference the primary key columns of the primary key table (describe how one table imports another's key.) This should normally return a single foreign key/primary key pair (most tables only import a foreign key from a table once.) They are ordered by FKTABLE_CAT, FKTABLE_SCHEM, FKTABLE_NAME, and KEY_SEQ.

Each foreign key column description has the following columns:

  1. PKTABLE_CAT String => primary key table catalog (may be null)
  2. PKTABLE_SCHEM String => primary key table schema (may be null)
  3. PKTABLE_NAME String => primary key table name
  4. PKCOLUMN_NAME String => primary key column name
  5. FKTABLE_CAT String => foreign key table catalog (may be null) being exported (may be null)
  6. FKTABLE_SCHEM String => foreign key table schema (may be null) being exported (may be null)
  7. FKTABLE_NAME String => foreign key table name being exported
  8. FKCOLUMN_NAME String => foreign key column name being exported
  9. KEY_SEQ short => sequence number within foreign key
  10. UPDATE_RULE short => What happens to foreign key when primary is updated:
    • importedNoAction - do not allow update of primary key if it has been imported
    • importedKeyCascade - change imported key to agree with primary key update
    • importedKeySetNull - change imported key to NULL if its primary key has been updated
    • importedKeySetDefault - change imported key to default values if its primary key has been updated
    • importedKeyRestrict - same as importedKeyNoAction (for ODBC 2.x compatibility)
  11. DELETE_RULE short => What happens to the foreign key when primary is deleted.
    • importedKeyNoAction - do not allow delete of primary key if it has been imported
    • importedKeyCascade - delete rows that import a deleted key
    • importedKeySetNull - change imported key to NULL if its primary key has been deleted
    • importedKeyRestrict - same as importedKeyNoAction (for ODBC 2.x compatibility)
    • importedKeySetDefault - change imported key to default if its primary key has been deleted
  12. FK_NAME String => foreign key name (may be null)
  13. PK_NAME String => primary key name (may be null)
  14. DEFERRABILITY short => can the evaluation of foreign key constraints be deferred until commit
    • importedKeyInitiallyDeferred - see SQL92 for definition
    • importedKeyInitiallyImmediate - see SQL92 for definition
    • importedKeyNotDeferrable - see SQL92 for definition

Parameters:
primaryCatalog - a catalog name; "" retrieves those without a catalog; null means drop catalog name from the selection criteria
primarySchema - a schema name pattern; "" retrieves those without a schema
primaryTable - the table name that exports the key
foreignCatalog - a catalog name; "" retrieves those without a catalog; null means drop catalog name from the selection criteria
foreignSchema - a schema name pattern; "" retrieves those without a schema
foreignTable - the table name that imports the key
Returns:
ResultSet - each row is a foreign key column description
Throws: SQLException
if a database-access error occurs.
See Also:
getImportedKeys
 o getTypeInfo
 public abstract ResultSet getTypeInfo() throws SQLException
Get a description of all the standard SQL types supported by this database. They are ordered by DATA_TYPE and then by how closely the data type maps to the corresponding JDBC SQL type.

Each type description has the following columns:

  1. TYPE_NAME String => Type name
  2. DATA_TYPE short => SQL data type from java.sql.Types
  3. PRECISION int => maximum precision
  4. LITERAL_PREFIX String => prefix used to quote a literal (may be null)
  5. LITERAL_SUFFIX String => suffix used to quote a literal (may be null)
  6. CREATE_PARAMS String => parameters used in creating the type (may be null)
  7. NULLABLE short => can you use NULL for this type?
    • typeNoNulls - does not allow NULL values
    • typeNullable - allows NULL values
    • typeNullableUnknown - nullability unknown
  8. CASE_SENSITIVE boolean=> is it case sensitive?
  9. SEARCHABLE short => can you use "WHERE" based on this type:
    • typePredNone - No support
    • typePredChar - Only supported with WHERE .. LIKE
    • typePredBasic - Supported except for WHERE .. LIKE
    • typeSearchable - Supported for all WHERE ..
  10. UNSIGNED_ATTRIBUTE boolean => is it unsigned?
  11. FIXED_PREC_SCALE boolean => can it be a money value?
  12. AUTO_INCREMENT boolean => can it be used for an auto-increment value?
  13. LOCAL_TYPE_NAME String => localized version of type name (may be null)
  14. MINIMUM_SCALE short => minimum scale supported
  15. MAXIMUM_SCALE short => maximum scale supported
  16. SQL_DATA_TYPE int => unused
  17. SQL_DATETIME_SUB int => unused
  18. NUM_PREC_RADIX int => usually 2 or 10

Returns:
ResultSet - each row is a SQL type description
Throws: SQLException
if a database-access error occurs.
 o getIndexInfo
 public abstract ResultSet getIndexInfo(String catalog,
                                        String schema,
                                        String table,
                                        boolean unique,
                                        boolean approximate) throws SQLException
Get a description of a table's indices and statistics. They are ordered by NON_UNIQUE, TYPE, INDEX_NAME, and ORDINAL_POSITION.

Each index column description has the following columns:

  1. TABLE_CAT String => table catalog (may be null)
  2. TABLE_SCHEM String => table schema (may be null)
  3. TABLE_NAME String => table name
  4. NON_UNIQUE boolean => Can index values be non-unique? false when TYPE is tableIndexStatistic
  5. INDEX_QUALIFIER String => index catalog (may be null); null when TYPE is tableIndexStatistic
  6. INDEX_NAME String => index name; null when TYPE is tableIndexStatistic
  7. TYPE short => index type:
    • tableIndexStatistic - this identifies table statistics that are returned in conjuction with a table's index descriptions
    • tableIndexClustered - this is a clustered index
    • tableIndexHashed - this is a hashed index
    • tableIndexOther - this is some other style of index
  8. ORDINAL_POSITION short => column sequence number within index; zero when TYPE is tableIndexStatistic
  9. COLUMN_NAME String => column name; null when TYPE is tableIndexStatistic
  10. ASC_OR_DESC String => column sort sequence, "A" => ascending, "D" => descending, may be null if sort sequence is not supported; null when TYPE is tableIndexStatistic
  11. CARDINALITY int => When TYPE is tableIndexStatistic, then this is the number of rows in the table; otherwise, it is the number of unique values in the index.
  12. PAGES int => When TYPE is tableIndexStatisic then this is the number of pages used for the table, otherwise it is the number of pages used for the current index.
  13. FILTER_CONDITION String => Filter condition, if any. (may be null)

Parameters:
catalog - a catalog name; "" retrieves those without a catalog; null means drop catalog name from the selection criteria
schema - a schema name pattern; "" retrieves those without a schema
table - a table name
unique - when true, return only indices for unique values; when false, return indices regardless of whether unique or not
approximate - when true, result is allowed to reflect approximate or out of data values; when false, results are requested to be accurate
Returns:
ResultSet - each row is an index column description
Throws: SQLException
if a database-access error occurs.

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