Statement (Java 2 Platform SE v1.4.1) - JDK 5 Documentation v1.4.1, Java 2 SDK 英文文档

Overview

Package

Class

Use

Tree

Deprecated

Index

Help

Java^TM 2 Platform
Std. Ed. v1.4.1

PREV CLASS NEXT CLASS

FRAMES NO FRAMES

SUMMARY: NESTED | FIELD | CONSTR | METHOD

DETAIL: FIELD | CONSTR | METHOD

java.sql
Interface Statement

All Known Subinterfaces:: CallableStatement, PreparedStatement

public interface Statement

The object used for executing a static SQL statement and returning the results it produces.

By default, only one ResultSet object per Statement object can be open at the same time. Therefore, if the reading of one ResultSet object is interleaved with the reading of another, each must have been generated by different Statement objects. All execution methods in the Statement interface implicitly close a statment's current ResultSet object if an open one exists.

See Also:: Connection.createStatement(), ResultSet

Field Summary

static int CLOSE_ALL_RESULTS
          The constant indicating that all ResultSet objects that have previously been kept open should be closed when calling getMoreResults.

static int CLOSE_CURRENT_RESULT
          The constant indicating that the current ResultSet object should be closed when calling getMoreResults.

static int EXECUTE_FAILED
          The constant indicating that an error occured while executing a batch statement.

static int KEEP_CURRENT_RESULT
          The constant indicating that the current ResultSet object should not be closed when calling getMoreResults.

static int NO_GENERATED_KEYS
          The constant indicating that generated keys should not be made available for retrieval.

static int RETURN_GENERATED_KEYS
          The constant indicating that generated keys should be made available for retrieval.

static int SUCCESS_NO_INFO
          The constant indicating that a batch statement executed successfully but that no count of the number of rows it affected is available.

Method Summary

void addBatch(String sql)
          Adds the given SQL command to the current list of commmands for this Statement object.

void cancel()
          Cancels this Statement object if both the DBMS and driver support aborting an SQL statement.

void clearBatch()
          Empties this Statement object's current list of SQL commands.

void clearWarnings()
          Clears all the warnings reported on this Statement object.

void close()
          Releases this Statement object's database and JDBC resources immediately instead of waiting for this to happen when it is automatically closed.

boolean execute(String sql)
          Executes the given SQL statement, which may return multiple results.

boolean execute(String sql, int autoGeneratedKeys)
          Executes the given SQL statement, which may return multiple results, and signals the driver that any auto-generated keys should be made available for retrieval.

boolean execute(String sql, int[] columnIndexes)
          Executes the given SQL statement, which may return multiple results, and signals the driver that the auto-generated keys indicated in the given array should be made available for retrieval.

boolean execute(String sql, String[] columnNames)
          Executes the given SQL statement, which may return multiple results, and signals the driver that the auto-generated keys indicated in the given array should be made available for retrieval.

int[] executeBatch()
          Submits a batch of commands to the database for execution and if all commands execute successfully, returns an array of update counts.

ResultSet executeQuery(String sql)
          Executes the given SQL statement, which returns a single ResultSet object.

int executeUpdate(String sql)
          Executes the given SQL statement, which may be an INSERT, UPDATE, or DELETE statement or an SQL statement that returns nothing, such as an SQL DDL statement.

int executeUpdate(String sql, int autoGeneratedKeys)
          Executes the given SQL statement and signals the driver with the given flag about whether the auto-generated keys produced by this Statement object should be made available for retrieval.

int executeUpdate(String sql, int[] columnIndexes)
          Executes the given SQL statement and signals the driver that the auto-generated keys indicated in the given array should be made available for retrieval.

int executeUpdate(String sql, String[] columnNames)
          Executes the given SQL statement and signals the driver that the auto-generated keys indicated in the given array should be made available for retrieval.

Connection getConnection()
          Retrieves the Connection object that produced this Statement object.

int getFetchDirection()
          Retrieves the direction for fetching rows from database tables that is the default for result sets generated from this Statement object.

int getFetchSize()
          Retrieves the number of result set rows that is the default fetch size for ResultSet objects generated from this Statement object.

ResultSet getGeneratedKeys()
          Retrieves any auto-generated keys created as a result of executing this Statement object.

int getMaxFieldSize()
          Retrieves the maximum number of bytes that can be returned for character and binary column values in a ResultSet object produced by this Statement object.

int getMaxRows()
          Retrieves the maximum number of rows that a ResultSet object produced by this Statement object can contain.

boolean getMoreResults()
          Moves to this Statement object's next result, returns true if it is a ResultSet object, and implicitly closes any current ResultSet object(s) obtained with the method getResultSet.

boolean getMoreResults(int current)
          Moves to this Statement object's next result, deals with any current ResultSet object(s) according to the instructions specified by the given flag, and returns true if the next result is a ResultSet object.

int getQueryTimeout()
          Retrieves the number of seconds the driver will wait for a Statement object to execute.

ResultSet getResultSet()
          Retrieves the current result as a ResultSet object.

int getResultSetConcurrency()
          Retrieves the result set concurrency for ResultSet objects generated by this Statement object.

int getResultSetHoldability()
          Retrieves the result set holdability for ResultSet objects generated by this Statement object.

int getResultSetType()
          Retrieves the result set type for ResultSet objects generated by this Statement object.

int getUpdateCount()
          Retrieves the current result as an update count; if the result is a ResultSet object or there are no more results, -1 is returned.

SQLWarning getWarnings()
          Retrieves the first warning reported by calls on this Statement object.

void setCursorName(String name)
          Sets the SQL cursor name to the given String, which will be used by subsequent Statement object execute methods.

void setEscapeProcessing(boolean enable)
          Sets escape processing on or off.

void setFetchDirection(int direction)
          Gives the driver a hint as to the direction in which rows will be processed in ResultSet objects created using this Statement object.

void setFetchSize(int rows)
          Gives the JDBC driver a hint as to the number of rows that should be fetched from the database when more rows are needed.

void setMaxFieldSize(int max)
          Sets the limit for the maximum number of bytes in a ResultSet column storing character or binary values to the given number of bytes.

void setMaxRows(int max)
          Sets the limit for the maximum number of rows that any ResultSet object can contain to the given number.

void setQueryTimeout(int seconds)
          Sets the number of seconds the driver will wait for a Statement object to execute to the given number of seconds.

Field Detail

CLOSE_CURRENT_RESULT

public static final int CLOSE_CURRENT_RESULT

The constant indicating that the current ResultSet object should be closed when calling getMoreResults.

Since:: 1.4
See Also:: Constant Field Values

KEEP_CURRENT_RESULT

public static final int KEEP_CURRENT_RESULT

The constant indicating that the current ResultSet object should not be closed when calling getMoreResults.

Since:: 1.4
See Also:: Constant Field Values

CLOSE_ALL_RESULTS

public static final int CLOSE_ALL_RESULTS

The constant indicating that all ResultSet objects that have previously been kept open should be closed when calling getMoreResults.

Since:: 1.4
See Also:: Constant Field Values

SUCCESS_NO_INFO

public static final int SUCCESS_NO_INFO

The constant indicating that a batch statement executed successfully but that no count of the number of rows it affected is available.

Since:: 1.4
See Also:: Constant Field Values

EXECUTE_FAILED

public static final int EXECUTE_FAILED

The constant indicating that an error occured while executing a batch statement.

Since:: 1.4
See Also:: Constant Field Values

RETURN_GENERATED_KEYS

public static final int RETURN_GENERATED_KEYS

The constant indicating that generated keys should be made available for retrieval.

Since:: 1.4
See Also:: Constant Field Values

NO_GENERATED_KEYS

public static final int NO_GENERATED_KEYS

The constant indicating that generated keys should not be made available for retrieval.

Since:: 1.4
See Also:: Constant Field Values

Method Detail

executeQuery

public ResultSet executeQuery(String sql)
                       throws SQLException

Executes the given SQL statement, which returns a single ResultSet object.

Parameters:: sql - an SQL statement to be sent to the database, typically a static SQL SELECT statement
Returns:: a ResultSet object that contains the data produced by the given query; never null
Throws:: SQLException - if a database access error occurs or the given SQL statement produces anything other than a single ResultSet object

executeUpdate

public int executeUpdate(String sql)
                  throws SQLException

Executes the given SQL statement, which may be an INSERT, UPDATE, or DELETE statement or an SQL statement that returns nothing, such as an SQL DDL statement.

Parameters:: sql - an SQL INSERT, UPDATE or DELETE statement or an SQL statement that returns nothing
Returns:: either the row count for INSERT, UPDATE or DELETE statements, or 0 for SQL statements that return nothing
Throws:: SQLException - if a database access error occurs or the given SQL statement produces a ResultSet object

close

public void close()
           throws SQLException

Releases this Statement object's database and JDBC resources immediately instead of waiting for this to happen when it is automatically closed. It is generally good practice to release resources as soon as you are finished with them to avoid tying up database resources.

Calling the method close on a Statement object that is already closed has no effect.

Note: A Statement object is automatically closed when it is garbage collected. When a Statement object is closed, its current ResultSet object, if one exists, is also closed.

Throws:: SQLException - if a database access error occurs

getMaxFieldSize

public int getMaxFieldSize()
                    throws SQLException

Retrieves the maximum number of bytes that can be returned for character and binary column values in a ResultSet object produced by this Statement object. This limit applies only to BINARY, VARBINARY, LONGVARBINARY, CHAR, VARCHAR, and LONGVARCHAR columns. If the limit is exceeded, the excess data is silently discarded.

Returns:: the current column size limit for columns storing character and binary values; zero means there is no limit
Throws:: SQLException - if a database access error occurs
See Also:: setMaxFieldSize(int)

setMaxFieldSize

public void setMaxFieldSize(int max)
                     throws SQLException

Sets the limit for the maximum number of bytes in a ResultSet column storing character or binary values to the given number of bytes. This limit applies only to BINARY, VARBINARY, LONGVARBINARY, CHAR, VARCHAR, and LONGVARCHAR fields. If the limit is exceeded, the excess data is silently discarded. For maximum portability, use values greater than 256.

Parameters:: max - the new column size limit in bytes; zero means there is no limit
Throws:: SQLException - if a database access error occurs or the condition max >= 0 is not satisfied
See Also:: getMaxFieldSize()

getMaxRows

public int getMaxRows()
               throws SQLException

Retrieves the maximum number of rows that a ResultSet object produced by this Statement object can contain. If this limit is exceeded, the excess rows are silently dropped.

Returns:: the current maximum number of rows for a ResultSet object produced by this Statement object; zero means there is no limit
Throws:: SQLException - if a database access error occurs
See Also:: setMaxRows(int)

setMaxRows

public void setMaxRows(int max)
                throws SQLException

Sets the limit for the maximum number of rows that any ResultSet object can contain to the given number. If the limit is exceeded, the excess rows are silently dropped.

Parameters:: max - the new max rows limit; zero means there is no limit
Throws:: SQLException - if a database access error occurs or the condition max >= 0 is not satisfied
See Also:: getMaxRows()

setEscapeProcessing

public void setEscapeProcessing(boolean enable)
                         throws SQLException

Sets escape processing on or off. If escape scanning is on (the default), the driver will do escape substitution before sending the SQL statement to the database. Note: Since prepared statements have usually been parsed prior to making this call, disabling escape processing for PreparedStatements objects will have no effect.

Parameters:: enable - true to enable escape processing; false to disable it
Throws:: SQLException - if a database access error occurs

getQueryTimeout

public int getQueryTimeout()
                    throws SQLException

Retrieves the number of seconds the driver will wait for a Statement object to execute. If the limit is exceeded, a SQLException is thrown.

Returns:: the current query timeout limit in seconds; zero means there is no limit
Throws:: SQLException - if a database access error occurs
See Also:: setQueryTimeout(int)

setQueryTimeout

public void setQueryTimeout(int seconds)
                     throws SQLException

Sets the number of seconds the driver will wait for a Statement object to execute to the given number of seconds. If the limit is exceeded, an SQLException is thrown.

Parameters:: seconds - the new query timeout limit in seconds; zero means there is no limit
Throws:: SQLException - if a database access error occurs or the condition seconds >= 0 is not satisfied
See Also:: getQueryTimeout()

cancel

public void cancel()
            throws SQLException

Cancels this Statement object if both the DBMS and driver support aborting an SQL statement. This method can be used by one thread to cancel a statement that is being executed by another thread.

Throws:: SQLException - if a database access error occurs

getWarnings

public SQLWarning getWarnings()
                       throws SQLException

Retrieves the first warning reported by calls on this Statement object. Subsequent Statement object warnings will be chained to this SQLWarning object.

The warning chain is automatically cleared each time a statement is (re)executed. This method may not be called on a closed Statement object; doing so will cause an SQLException to be thrown.

Note: If you are processing a ResultSet object, any warnings associated with reads on that ResultSet object will be chained on it rather than on the Statement object that produced it.

Returns:: the first SQLWarning object or null if there are no warnings
Throws:: SQLException - if a database access error occurs or this method is called on a closed statement

clearWarnings

public void clearWarnings()
                   throws SQLException

Clears all the warnings reported on this Statement object. After a call to this method, the method getWarnings will return null until a new warning is reported for this Statement object.

Throws:: SQLException - if a database access error occurs

setCursorName

public void setCursorName(String name)
                   throws SQLException

Sets the SQL cursor name to the given String, which will be used by subsequent Statement object execute methods. This name can then be used in SQL positioned update or delete statements to identify the current row in the ResultSet object generated by this statement. If the database does not support positioned update/delete, this method is a noop. To insure that a cursor has the proper isolation level to support updates, the cursor's SELECT statement should have the form SELECT FOR UPDATE. If FOR UPDATE is not present, positioned updates may fail.

Note: By definition, the execution of positioned updates and deletes must be done by a different Statement object than the one that generated the ResultSet object being used for positioning. Also, cursor names must be unique within a connection.

Parameters:: name - the new cursor name, which must be unique within a connection
Throws:: SQLException - if a database access error occurs

execute

public boolean execute(String sql)
                throws SQLException

Executes the given SQL statement, which may return multiple results. In some (uncommon) situations, a single SQL statement may return multiple result sets and/or update counts. Normally you can ignore this unless you are (1) executing a stored procedure that you know may return multiple results or (2) you are dynamically executing an unknown SQL string.

The execute method executes an SQL statement and indicates the form of the first result. You must then use the methods getResultSet or getUpdateCount to retrieve the result, and getMoreResults to move to any subsequent result(s).

Parameters:: sql - any SQL statement
Returns:: true if the first result is a ResultSet object; false if it is an update count or there are no results
Throws:: SQLException - if a database access error occurs
See Also:: getResultSet(), getUpdateCount(), getMoreResults()

getResultSet

public ResultSet getResultSet()
                       throws SQLException

Retrieves the current result as a ResultSet object. This method should be called only once per result.

Returns:: the current result as a ResultSet object or null if the result is an update count or there are no more results
Throws:: SQLException - if a database access error occurs
See Also:: execute(java.lang.String)

getUpdateCount

public int getUpdateCount()
                   throws SQLException

Retrieves the current result as an update count; if the result is a ResultSet object or there are no more results, -1 is returned. This method should be called only once per result.

Returns:: the current result as an update count; -1 if the current result is a ResultSet object or there are no more results
Throws:: SQLException - if a database access error occurs
See Also:: execute(java.lang.String)

getMoreResults

public boolean getMoreResults()
                       throws SQLException

Moves to this Statement object's next result, returns true if it is a ResultSet object, and implicitly closes any current ResultSet object(s) obtained with the method getResultSet.

There are no more results when the following is true:

      (!getMoreResults() && (getUpdateCount() == -1)

Returns:: true if the next result is a ResultSet object; false if it is an update count or there are no more results
Throws:: SQLException - if a database access error occurs
See Also:: execute(java.lang.String)

setFetchDirection

public void setFetchDirection(int direction)
                       throws SQLException

Gives the driver a hint as to the direction in which rows will be processed in ResultSet objects created using this Statement object. The default value is ResultSet.FETCH_FORWARD.

Note that this method sets the default fetch direction for result sets generated by this Statement object. Each result set has its own methods for getting and setting its own fetch direction.

Parameters:: direction - the initial direction for processing rows
Throws:: SQLException - if a database access error occurs or the given direction is not one of ResultSet.FETCH_FORWARD, ResultSet.FETCH_REVERSE, or ResultSet.FETCH_UNKNOWN
Since:: 1.2
See Also:: getFetchDirection()

getFetchDirection

public int getFetchDirection()
                      throws SQLException

Retrieves the direction for fetching rows from database tables that is the default for result sets generated from this Statement object. If this Statement object has not set a fetch direction by calling the method setFetchDirection, the return value is implementation-specific.

Returns:: the default fetch direction for result sets generated from this Statement object
Throws:: SQLException - if a database access error occurs
Since:: 1.2
See Also:: setFetchDirection(int)

setFetchSize

public void setFetchSize(int rows)
                  throws SQLException

Gives the JDBC driver a hint as to the number of rows that should be fetched from the database when more rows are needed. The number of rows specified affects only result sets created using this statement. If the value specified is zero, then the hint is ignored. The default value is zero.

Parameters:: rows - the number of rows to fetch
Throws:: SQLException - if a database access error occurs, or the condition 0 <= rows <= this.getMaxRows() is not satisfied.
Since:: 1.2
See Also:: getFetchSize()

getFetchSize

public int getFetchSize()
                 throws SQLException

Retrieves the number of result set rows that is the default fetch size for ResultSet objects generated from this Statement object. If this Statement object has not set a fetch size by calling the method setFetchSize, the return value is implementation-specific.

Returns:: the default fetch size for result sets generated from this Statement object
Throws:: SQLException - if a database access error occurs
Since:: 1.2
See Also:: setFetchSize(int)

getResultSetConcurrency

public int getResultSetConcurrency()
                            throws SQLException

Retrieves the result set concurrency for ResultSet objects generated by this Statement object.

Returns:: either ResultSet.CONCUR_READ_ONLY or ResultSet.CONCUR_UPDATABLE
Throws:: SQLException - if a database access error occurs
Since:: 1.2

getResultSetType

public int getResultSetType()
                     throws SQLException

Retrieves the result set type for ResultSet objects generated by this Statement object.

Returns:: one of ResultSet.TYPE_FORWARD_ONLY, ResultSet.TYPE_SCROLL_INSENSITIVE, or ResultSet.TYPE_SCROLL_SENSITIVE
Throws:: SQLException - if a database access error occurs
Since:: 1.2

addBatch

public void addBatch(String sql)
              throws SQLException

Adds the given SQL command to the current list of commmands for this Statement object. The commands in this list can be executed as a batch by calling the method executeBatch.

NOTE: This method is optional.

Parameters:: sql - typically this is a static SQL INSERT or UPDATE statement
Throws:: SQLException - if a database access error occurs, or the driver does not support batch updates
Since:: 1.2
See Also:: executeBatch()

clearBatch

public void clearBatch()
                throws SQLException

Empties this Statement object's current list of SQL commands.

NOTE: This method is optional.

Throws:: SQLException - if a database access error occurs or the driver does not support batch updates
Since:: 1.2
See Also:: addBatch(java.lang.String)

executeBatch

public int[] executeBatch()
                   throws SQLException

Submits a batch of commands to the database for execution and if all commands execute successfully, returns an array of update counts. The int elements of the array that is returned are ordered to correspond to the commands in the batch, which are ordered according to the order in which they were added to the batch. The elements in the array returned by the method executeBatch may be one of the following:

A number greater than or equal to zero -- indicates that the command was processed successfully and is an update count giving the number of rows in the database that were affected by the command's execution
A value of SUCCESS_NO_INFO -- indicates that the command was processed successfully but that the number of rows affected is unknown
If one of the commands in a batch update fails to execute properly, this method throws a BatchUpdateException, and a JDBC driver may or may not continue to process the remaining commands in the batch. However, the driver's behavior must be consistent with a particular DBMS, either always continuing to process commands or never continuing to process commands. If the driver continues processing after a failure, the array returned by the method BatchUpdateException.getUpdateCounts will contain as many elements as there are commands in the batch, and at least one of the elements will be the following:
A value of EXECUTE_FAILED -- indicates that the command failed to execute successfully and occurs only if a driver continues to process commands after a command fails

A driver is not required to implement this method. The possible implementations and return values have been modified in the Java 2 SDK, Standard Edition, version 1.3 to accommodate the option of continuing to proccess commands in a batch update after a BatchUpdateException obejct has been thrown.

Returns:: an array of update counts containing one element for each command in the batch. The elements of the array are ordered according to the order in which commands were added to the batch.
Throws:: SQLException - if a database access error occurs or the driver does not support batch statements. Throws BatchUpdateException (a subclass of SQLException) if one of the commands sent to the database fails to execute properly or attempts to return a result set.
Since:: 1.3

getConnection

public Connection getConnection()
                         throws SQLException

Retrieves the Connection object that produced this Statement object.

Returns:: the connection that produced this statement
Throws:: SQLException - if a database access error occurs
Since:: 1.2

getMoreResults

public boolean getMoreResults(int current)
                       throws SQLException

Moves to this Statement object's next result, deals with any current ResultSet object(s) according to the instructions specified by the given flag, and returns true if the next result is a ResultSet object.

There are no more results when the following is true:

      (!getMoreResults() && (getUpdateCount() == -1)

Parameters:: current - one of the following Statement constants indicating what should happen to current ResultSet objects obtained using the method getResultSetCLOSE_CURRENT_RESULT, KEEP_CURRENT_RESULT, or CLOSE_ALL_RESULTS
Returns:: true if the next result is a ResultSet object; false if it is an update count or there are no more results
Throws:: SQLException - if a database access error occurs
Since:: 1.4
See Also:: execute(java.lang.String)

getGeneratedKeys

public ResultSet getGeneratedKeys()
                           throws SQLException

Retrieves any auto-generated keys created as a result of executing this Statement object. If this Statement object did not generate any keys, an empty ResultSet object is returned.

Returns:: a ResultSet object containing the auto-generated key(s) generated by the execution of this Statement object
Throws:: SQLException - if a database access error occurs
Since:: 1.4

executeUpdate

public int executeUpdate(String sql,
                         int autoGeneratedKeys)
                  throws SQLException

Executes the given SQL statement and signals the driver with the given flag about whether the auto-generated keys produced by this Statement object should be made available for retrieval.

Parameters:: sql - must be an SQL INSERT, UPDATE or DELETE statement or an SQL statement that returns nothing; autoGeneratedKeys - a flag indicating whether auto-generated keys should be made available for retrieval; one of the following constants: Statement.RETURN_GENERATED_KEYS Statement.NO_GENERATED_KEYS
Returns:: either the row count for INSERT, UPDATE or DELETE statements, or 0 for SQL statements that return nothing
Throws:: SQLException - if a database access error occurs, the given SQL statement returns a ResultSet object, or the given constant is not one of those allowed
Since:: 1.4

executeUpdate

public int executeUpdate(String sql,
                         int[] columnIndexes)
                  throws SQLException

Executes the given SQL statement and signals the driver that the auto-generated keys indicated in the given array should be made available for retrieval. The driver will ignore the array if the SQL statement is not an INSERT statement.

Parameters:: sql - an SQL INSERT, UPDATE or DELETE statement or an SQL statement that returns nothing, such as an SQL DDL statement; columnIndexes - an array of column indexes indicating the columns that should be returned from the inserted row
Returns:: either the row count for INSERT, UPDATE, or DELETE statements, or 0 for SQL statements that return nothing
Throws:: SQLException - if a database access error occurs or the SQL statement returns a ResultSet object
Since:: 1.4

executeUpdate

public int executeUpdate(String sql,
                         String[] columnNames)
                  throws SQLException

Parameters:: sql - an SQL INSERT, UPDATE or DELETE statement or an SQL statement that returns nothing; columnNames - an array of the names of the columns that should be returned from the inserted row
Returns:: either the row count for INSERT, UPDATE, or DELETE statements, or 0 for SQL statements that return nothing
Throws:: SQLException - if a database access error occurs
Since:: 1.4

execute

public boolean execute(String sql,
                       int autoGeneratedKeys)
                throws SQLException

Executes the given SQL statement, which may return multiple results, and signals the driver that any auto-generated keys should be made available for retrieval. The driver will ignore this signal if the SQL statement is not an INSERT statement.

In some (uncommon) situations, a single SQL statement may return multiple result sets and/or update counts. Normally you can ignore this unless you are (1) executing a stored procedure that you know may return multiple results or (2) you are dynamically executing an unknown SQL string.

Parameters:: sql - any SQL statement; autoGeneratedKeys - a constant indicating whether auto-generated keys should be made available for retrieval using the method getGeneratedKeys; one of the following constants: Statement.RETURN_GENERATED_KEYS or Statement.NO_GENERATED_KEYS
Returns:: true if the first result is a ResultSet object; false if it is an update count or there are no results
Throws:: SQLException - if a database access error occurs
Since:: 1.4
See Also:: getResultSet(), getUpdateCount(), getMoreResults(), getGeneratedKeys()

execute

public boolean execute(String sql,
                       int[] columnIndexes)
                throws SQLException

Executes the given SQL statement, which may return multiple results, and signals the driver that the auto-generated keys indicated in the given array should be made available for retrieval. This array contains the indexes of the columns in the target table that contain the auto-generated keys that should be made available. The driver will ignore the array if the given SQL statement is not an INSERT statement.

Under some (uncommon) situations, a single SQL statement may return multiple result sets and/or update counts. Normally you can ignore this unless you are (1) executing a stored procedure that you know may return multiple results or (2) you are dynamically executing an unknown SQL string.

Parameters:: sql - any SQL statement; columnIndexes - an array of the indexes of the columns in the inserted row that should be made available for retrieval by a call to the method getGeneratedKeys
Returns:: true if the first result is a ResultSet object; false if it is an update count or there are no results
Throws:: SQLException - if a database access error occurs
Since:: 1.4
See Also:: getResultSet(), getUpdateCount(), getMoreResults()

execute

public boolean execute(String sql,
                       String[] columnNames)
                throws SQLException

Executes the given SQL statement, which may return multiple results, and signals the driver that the auto-generated keys indicated in the given array should be made available for retrieval. This array contains the names of the columns in the target table that contain the auto-generated keys that should be made available. The driver will ignore the array if the given SQL statement is not an INSERT statement.

Parameters:: sql - any SQL statement; columnNames - an array of the names of the columns in the inserted row that should be made available for retrieval by a call to the method getGeneratedKeys
Returns:: true if the next result is a ResultSet object; false if it is an update count or there are no more results
Throws:: SQLException - if a database access error occurs
Since:: 1.4
See Also:: getResultSet(), getUpdateCount(), getMoreResults(), getGeneratedKeys()

getResultSetHoldability

public int getResultSetHoldability()
                            throws SQLException

Retrieves the result set holdability for ResultSet objects generated by this Statement object.

Returns:: either ResultSet.HOLD_CURSORS_OVER_COMMIT or ResultSet.CLOSE_CURSORS_AT_COMMIT
Throws:: SQLException - if a database access error occurs
Since:: 1.4

Overview

Package

Class

Use

Tree

Deprecated

Index

Help

Java^TM 2 Platform
Std. Ed. v1.4.1

PREV CLASS NEXT CLASS

FRAMES NO FRAMES

SUMMARY: NESTED | FIELD | CONSTR | METHOD

DETAIL: FIELD | CONSTR | METHOD

Submit a bug or feature
For further API reference and developer documentation, see Java 2 SDK SE Developer Documentation. That documentation contains more detailed, developer-targeted descriptions, with conceptual overviews, definitions of terms, workarounds, and working code examples.

Field Summary
`static int`	`CLOSE_ALL_RESULTS` The constant indicating that all `ResultSet` objects that have previously been kept open should be closed when calling `getMoreResults`.
`static int`	`CLOSE_CURRENT_RESULT` The constant indicating that the current `ResultSet` object should be closed when calling `getMoreResults`.
`static int`	`EXECUTE_FAILED` The constant indicating that an error occured while executing a batch statement.
`static int`	`KEEP_CURRENT_RESULT` The constant indicating that the current `ResultSet` object should not be closed when calling `getMoreResults`.
`static int`	`NO_GENERATED_KEYS` The constant indicating that generated keys should not be made available for retrieval.
`static int`	`RETURN_GENERATED_KEYS` The constant indicating that generated keys should be made available for retrieval.
`static int`	`SUCCESS_NO_INFO` The constant indicating that a batch statement executed successfully but that no count of the number of rows it affected is available.

Method Summary
`void`	`addBatch(String sql)` Adds the given SQL command to the current list of commmands for this `Statement` object.
`void`	`cancel()` Cancels this `Statement` object if both the DBMS and driver support aborting an SQL statement.
`void`	`clearBatch()` Empties this `Statement` object's current list of SQL commands.
`void`	`clearWarnings()` Clears all the warnings reported on this `Statement` object.
`void`	`close()` Releases this `Statement` object's database and JDBC resources immediately instead of waiting for this to happen when it is automatically closed.
`boolean`	`execute(String sql)` Executes the given SQL statement, which may return multiple results.
`boolean`	`execute(String sql, int autoGeneratedKeys)` Executes the given SQL statement, which may return multiple results, and signals the driver that any auto-generated keys should be made available for retrieval.
`boolean`	`execute(String sql, int[] columnIndexes)` Executes the given SQL statement, which may return multiple results, and signals the driver that the auto-generated keys indicated in the given array should be made available for retrieval.
`boolean`	`execute(String sql, String[] columnNames)` Executes the given SQL statement, which may return multiple results, and signals the driver that the auto-generated keys indicated in the given array should be made available for retrieval.
`int[]`	`executeBatch()` Submits a batch of commands to the database for execution and if all commands execute successfully, returns an array of update counts.
`ResultSet`	`executeQuery(String sql)` Executes the given SQL statement, which returns a single `ResultSet` object.
`int`	`executeUpdate(String sql)` Executes the given SQL statement, which may be an `INSERT`, `UPDATE`, or `DELETE` statement or an SQL statement that returns nothing, such as an SQL DDL statement.
`int`	`executeUpdate(String sql, int autoGeneratedKeys)` Executes the given SQL statement and signals the driver with the given flag about whether the auto-generated keys produced by this `Statement` object should be made available for retrieval.
`int`	`executeUpdate(String sql, int[] columnIndexes)` Executes the given SQL statement and signals the driver that the auto-generated keys indicated in the given array should be made available for retrieval.
`int`	`executeUpdate(String sql, String[] columnNames)` Executes the given SQL statement and signals the driver that the auto-generated keys indicated in the given array should be made available for retrieval.
`Connection`	`getConnection()` Retrieves the `Connection` object that produced this `Statement` object.
`int`	`getFetchDirection()` Retrieves the direction for fetching rows from database tables that is the default for result sets generated from this `Statement` object.
`int`	`getFetchSize()` Retrieves the number of result set rows that is the default fetch size for `ResultSet` objects generated from this `Statement` object.
`ResultSet`	`getGeneratedKeys()` Retrieves any auto-generated keys created as a result of executing this `Statement` object.
`int`	`getMaxFieldSize()` Retrieves the maximum number of bytes that can be returned for character and binary column values in a `ResultSet` object produced by this `Statement` object.
`int`	`getMaxRows()` Retrieves the maximum number of rows that a `ResultSet` object produced by this `Statement` object can contain.
`boolean`	`getMoreResults()` Moves to this `Statement` object's next result, returns `true` if it is a `ResultSet` object, and implicitly closes any current `ResultSet` object(s) obtained with the method `getResultSet`.
`boolean`	`getMoreResults(int current)` Moves to this `Statement` object's next result, deals with any current `ResultSet` object(s) according to the instructions specified by the given flag, and returns `true` if the next result is a `ResultSet` object.
`int`	`getQueryTimeout()` Retrieves the number of seconds the driver will wait for a `Statement` object to execute.
`ResultSet`	`getResultSet()` Retrieves the current result as a `ResultSet` object.
`int`	`getResultSetConcurrency()` Retrieves the result set concurrency for `ResultSet` objects generated by this `Statement` object.
`int`	`getResultSetHoldability()` Retrieves the result set holdability for `ResultSet` objects generated by this `Statement` object.
`int`	`getResultSetType()` Retrieves the result set type for `ResultSet` objects generated by this `Statement` object.
`int`	`getUpdateCount()` Retrieves the current result as an update count; if the result is a `ResultSet` object or there are no more results, -1 is returned.
`SQLWarning`	`getWarnings()` Retrieves the first warning reported by calls on this `Statement` object.
`void`	`setCursorName(String name)` Sets the SQL cursor name to the given `String`, which will be used by subsequent `Statement` object `execute` methods.
`void`	`setEscapeProcessing(boolean enable)` Sets escape processing on or off.
`void`	`setFetchDirection(int direction)` Gives the driver a hint as to the direction in which rows will be processed in `ResultSet` objects created using this `Statement` object.
`void`	`setFetchSize(int rows)` Gives the JDBC driver a hint as to the number of rows that should be fetched from the database when more rows are needed.
`void`	`setMaxFieldSize(int max)` Sets the limit for the maximum number of bytes in a `ResultSet` column storing character or binary values to the given number of bytes.
`void`	`setMaxRows(int max)` Sets the limit for the maximum number of rows that any `ResultSet` object can contain to the given number.
`void`	`setQueryTimeout(int seconds)` Sets the number of seconds the driver will wait for a `Statement` object to execute to the given number of seconds.

Statement (Java 2 Platform SE v1.4.1) - JDK 5 Documentation v1.4.1, Java 2 SDK 英文文档

java.sql Interface Statement

CLOSE_CURRENT_RESULT

KEEP_CURRENT_RESULT

CLOSE_ALL_RESULTS

SUCCESS_NO_INFO

EXECUTE_FAILED

RETURN_GENERATED_KEYS

NO_GENERATED_KEYS

executeQuery

executeUpdate

close

getMaxFieldSize

setMaxFieldSize

getMaxRows

setMaxRows

setEscapeProcessing

getQueryTimeout

setQueryTimeout

cancel

getWarnings

clearWarnings

setCursorName

execute

getResultSet

getUpdateCount

getMoreResults

setFetchDirection

getFetchDirection

setFetchSize

getFetchSize

getResultSetConcurrency

getResultSetType

addBatch

clearBatch

executeBatch

getConnection

getMoreResults

getGeneratedKeys

executeUpdate

executeUpdate

executeUpdate

execute

execute

execute

getResultSetHoldability

java.sql
Interface Statement