Module java.sql

Package java.sql

Interface Statement

All Superinterfaces:

AutoCloseable, Wrapper

All Known Subinterfaces:

CallableStatement, PreparedStatement

public interface Statement
extends Wrapper, AutoCloseable

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 current ResultSet object of the statement if an open one exists.

Since:

1.1

See Also:

• Connection.createStatement()
• ResultSet

Field Summary

Fields

Modifier and Type	Field	Description
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.
static final int	CLOSE_CURRENT_RESULT	The constant indicating that the current ResultSet object should be closed when calling getMoreResults.
static final int	EXECUTE_FAILED	The constant indicating that an error occurred while executing a batch statement.
static final int	KEEP_CURRENT_RESULT	The constant indicating that the current ResultSet object should not be closed when calling getMoreResults.
static final int	NO_GENERATED_KEYS	The constant indicating that generated keys should not be made available for retrieval.
static final int	RETURN_GENERATED_KEYS	The constant indicating that generated keys should be made available for retrieval.
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.

Method Summary

Modifier and Type	Method	Description
void	addBatch(String sql)	Adds the given SQL command to the current list of commands 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.
void	closeOnCompletion()	Specifies that this Statement will be closed when all its dependent result sets are closed.
default String	enquoteIdentifier(String identifier, boolean alwaysQuote)	Returns a SQL identifier.
default String	enquoteLiteral(String val)	Returns a String enclosed in single quotes.
default String	enquoteNCharLiteral(String val)	Returns a String representing a National Character Set Literal enclosed in single quotes and prefixed with a upper case letter N.
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.
default long[]	executeLargeBatch()	Submits a batch of commands to the database for execution and if all commands execute successfully, returns an array of update counts.
default long	executeLargeUpdate(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.
default long	executeLargeUpdate(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.
default long	executeLargeUpdate(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.
default long	executeLargeUpdate(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.
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.
default long	getLargeMaxRows()	Retrieves the maximum number of rows that a ResultSet object produced by this Statement object can contain.
default long	getLargeUpdateCount()	Retrieves the current result as an update count; if the result is a ResultSet object or there are no more results, -1 is returned.
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.
boolean	isClosed()	Retrieves whether this Statement object has been closed.
boolean	isCloseOnCompletion()	Returns a value indicating whether this Statement will be closed when all its dependent result sets are closed.
boolean	isPoolable()	Returns a value indicating whether the Statement is poolable or not.
default boolean	isSimpleIdentifier(String identifier)	Retrieves whether identifier is a simple SQL identifier.
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 for ResultSet objects generated by this Statement.
default void	setLargeMaxRows(long max)	Sets the limit for the maximum number of rows that any ResultSet object generated by this Statement object can contain to the given number.
void	setMaxFieldSize(int max)	Sets the limit for the maximum number of bytes that can be returned for character and binary column values in a ResultSet object produced by this Statement object.
void	setMaxRows(int max)	Sets the limit for the maximum number of rows that any ResultSet object generated by this Statement object can contain to the given number.
void	setPoolable(boolean poolable)	Requests that a Statement be pooled or not pooled.
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.

Methods declared in interface java.sql.Wrapper

isWrapperFor, unwrap

Field Details

CLOSE_CURRENT_RESULT

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

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

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

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

static final int EXECUTE_FAILED

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

Since:

1.4

See Also:

• Constant Field Values

RETURN_GENERATED_KEYS

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

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 Details

executeQuery

ResultSet executeQuery(String sql)
                throws SQLException

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

Note:This method cannot be called on a PreparedStatement or CallableStatement.

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, this method is called on a closed Statement, the given SQL statement produces anything other than a single ResultSet object, the method is called on a PreparedStatement or CallableStatement

SQLTimeoutException - when the driver has determined that the timeout value that was specified by the setQueryTimeout method has been exceeded and has at least attempted to cancel the currently running Statement

executeUpdate

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.

Note:This method cannot be called on a PreparedStatement or CallableStatement.

Parameters:

sql - an SQL Data Manipulation Language (DML) statement, such as INSERT, UPDATE or DELETE; or an SQL statement that returns nothing, such as a DDL statement.

Returns:

either (1) the row count for SQL Data Manipulation Language (DML) statements or (2) 0 for SQL statements that return nothing

Throws:

SQLException - if a database access error occurs, this method is called on a closed Statement, the given SQL statement produces a ResultSet object, the method is called on a PreparedStatement or CallableStatement

SQLTimeoutException - when the driver has determined that the timeout value that was specified by the setQueryTimeout method has been exceeded and has at least attempted to cancel the currently running Statement

close

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:When a Statement object is closed, its current ResultSet object, if one exists, is also closed.

Specified by:

close in interface AutoCloseable

Throws:

SQLException - if a database access error occurs

getMaxFieldSize

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, NCHAR, NVARCHAR, LONGNVARCHAR 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 or this method is called on a closed Statement

See Also:

• setMaxFieldSize(int)

setMaxFieldSize

void setMaxFieldSize(int max)
              throws SQLException

Sets the limit for 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, NCHAR, NVARCHAR, LONGNVARCHAR 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, this method is called on a closed Statement or the condition max >= 0 is not satisfied

See Also:

• getMaxFieldSize()

getMaxRows

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 or this method is called on a closed Statement

See Also:

• setMaxRows(int)

setMaxRows

void setMaxRows(int max)
         throws SQLException

Sets the limit for the maximum number of rows that any ResultSet object generated by this Statement 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, this method is called on a closed Statement or the condition max >= 0 is not satisfied

See Also:

• getMaxRows()

setEscapeProcessing

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.

The Connection and DataSource property escapeProcessing may be used to change the default escape processing behavior. A value of true (the default) enables escape Processing for all Statement objects. A value of false disables escape processing for all Statement objects. The setEscapeProcessing method may be used to specify the escape processing behavior for an individual Statement object.

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 or this method is called on a closed Statement

getQueryTimeout

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 or this method is called on a closed Statement

See Also:

• setQueryTimeout(int)

setQueryTimeout

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. By default there is no limit on the amount of time allowed for a running statement to complete. If the limit is exceeded, an SQLTimeoutException is thrown. A JDBC driver must apply this limit to the execute, executeQuery and executeUpdate methods.

Note: JDBC driver implementations may also apply this limit to ResultSet methods (consult your driver vendor documentation for details).

Note: In the case of Statement batching, it is implementation defined as to whether the time-out is applied to individual SQL commands added via the addBatch method or to the entire batch of SQL commands invoked by the executeBatch method (consult your driver vendor documentation for details).

Parameters:

seconds - the new query timeout limit in seconds; zero means there is no limit

Throws:

SQLException - if a database access error occurs, this method is called on a closed Statement or the condition seconds >= 0 is not satisfied

See Also:

• getQueryTimeout()

cancel

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 or this method is called on a closed Statement

SQLFeatureNotSupportedException - if the JDBC driver does not support this method

getWarnings

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

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 or this method is called on a closed Statement

setCursorName

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 or this method is called on a closed Statement

SQLFeatureNotSupportedException - if the JDBC driver does not support this method

execute

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).

Note:This method cannot be called on a PreparedStatement or CallableStatement.

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, this method is called on a closed Statement, the method is called on a PreparedStatement or CallableStatement

SQLTimeoutException - when the driver has determined that the timeout value that was specified by the setQueryTimeout method has been exceeded and has at least attempted to cancel the currently running Statement

See Also:

• getResultSet()
• getUpdateCount()
• getMoreResults()

getResultSet

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 or this method is called on a closed Statement

See Also:

• execute(java.lang.String)

getUpdateCount

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 or this method is called on a closed Statement

See Also:

• execute(java.lang.String)

getMoreResults

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:

     // stmt is a Statement object
     ((stmt.getMoreResults() == false) && (stmt.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 or this method is called on a closed Statement

See Also:

• execute(java.lang.String)

setFetchDirection

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, this method is called on a closed Statement 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

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 or this method is called on a closed Statement

Since:

1.2

See Also:

• setFetchDirection(int)

setFetchSize

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 for ResultSet objects generated by 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, this method is called on a closed Statement or the condition rows >= 0 is not satisfied.

Since:

1.2

See Also:

• getFetchSize()

getFetchSize

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 or this method is called on a closed Statement

Since:

1.2

See Also:

• setFetchSize(int)

getResultSetConcurrency

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 or this method is called on a closed Statement

Since:

1.2

getResultSetType

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 or this method is called on a closed Statement

Since:

1.2

addBatch

void addBatch(String sql)
       throws SQLException

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

Note:This method cannot be called on a PreparedStatement or CallableStatement.

Parameters:

sql - typically this is a SQL INSERT or UPDATE statement

Throws:

SQLException - if a database access error occurs, this method is called on a closed Statement, the driver does not support batch updates, the method is called on a PreparedStatement or CallableStatement

Since:

1.2

See Also:

• executeBatch()
• DatabaseMetaData.supportsBatchUpdates()

clearBatch

void clearBatch()
         throws SQLException

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

Throws:

SQLException - if a database access error occurs, this method is called on a closed Statement or the driver does not support batch updates

Since:

1.2

See Also:

• addBatch(java.lang.String)
• DatabaseMetaData.supportsBatchUpdates()

executeBatch

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:

1. 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
2. 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:

3. 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

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 process commands in a batch update after a BatchUpdateException object 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, this method is called on a closed Statement 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.

SQLTimeoutException - when the driver has determined that the timeout value that was specified by the setQueryTimeout method has been exceeded and has at least attempted to cancel the currently running Statement

Since:

1.2

See Also:

• addBatch(java.lang.String)
• DatabaseMetaData.supportsBatchUpdates()

getConnection

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 or this method is called on a closed Statement

Since:

1.2

getMoreResults

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:

     // stmt is a Statement object
     ((stmt.getMoreResults(current) == false) && (stmt.getUpdateCount() == -1))
 

Parameters:

current - one of the following Statement constants indicating what should happen to current ResultSet objects obtained using the method getResultSet: Statement.CLOSE_CURRENT_RESULT, Statement.KEEP_CURRENT_RESULT, or Statement.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, this method is called on a closed Statement or the argument supplied is not one of the following: Statement.CLOSE_CURRENT_RESULT, Statement.KEEP_CURRENT_RESULT or Statement.CLOSE_ALL_RESULTS

SQLFeatureNotSupportedException - if DatabaseMetaData.supportsMultipleOpenResults returns false and either Statement.KEEP_CURRENT_RESULT or Statement.CLOSE_ALL_RESULTS are supplied as the argument.

Since:

1.4

See Also:

• execute(java.lang.String)

getGeneratedKeys

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.

Note:If the columns which represent the auto-generated keys were not specified, the JDBC driver implementation will determine the columns which best represent the auto-generated keys.

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 or this method is called on a closed Statement

SQLFeatureNotSupportedException - if the JDBC driver does not support this method

Since:

1.4

executeUpdate

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. The driver will ignore the flag if the SQL statement is not an INSERT statement, or an SQL statement able to return auto-generated keys (the list of such statements is vendor-specific).

Note:This method cannot be called on a PreparedStatement or CallableStatement.

Parameters:

sql - an SQL Data Manipulation Language (DML) statement, such as INSERT, UPDATE or DELETE; or an SQL statement that returns nothing, such as a DDL statement.

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 (1) the row count for SQL Data Manipulation Language (DML) statements or (2) 0 for SQL statements that return nothing

Throws:

SQLException - if a database access error occurs, this method is called on a closed Statement, the given SQL statement returns a ResultSet object, the given constant is not one of those allowed, the method is called on a PreparedStatement or CallableStatement

SQLFeatureNotSupportedException - if the JDBC driver does not support this method with a constant of Statement.RETURN_GENERATED_KEYS

SQLTimeoutException - when the driver has determined that the timeout value that was specified by the setQueryTimeout method has been exceeded and has at least attempted to cancel the currently running Statement

Since:

1.4

executeUpdate

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. 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 SQL statement is not an INSERT statement, or an SQL statement able to return auto-generated keys (the list of such statements is vendor-specific).

Note:This method cannot be called on a PreparedStatement or CallableStatement.

Parameters:

sql - an SQL Data Manipulation Language (DML) statement, such as INSERT, UPDATE or DELETE; or an SQL statement that returns nothing, such as a DDL statement.

columnIndexes - an array of column indexes indicating the columns that should be returned from the inserted row

Returns:

either (1) the row count for SQL Data Manipulation Language (DML) statements or (2) 0 for SQL statements that return nothing

Throws:

SQLException - if a database access error occurs, this method is called on a closed Statement, the SQL statement returns a ResultSet object, the second argument supplied to this method is not an int array whose elements are valid column indexes, the method is called on a PreparedStatement or CallableStatement

SQLFeatureNotSupportedException - if the JDBC driver does not support this method

SQLTimeoutException - when the driver has determined that the timeout value that was specified by the setQueryTimeout method has been exceeded and has at least attempted to cancel the currently running Statement

Since:

1.4

executeUpdate

int executeUpdate(String sql,
 String[] columnNames)
           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. 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 SQL statement is not an INSERT statement, or an SQL statement able to return auto-generated keys (the list of such statements is vendor-specific).

Note:This method cannot be called on a PreparedStatement or CallableStatement.

Parameters:

sql - an SQL Data Manipulation Language (DML) statement, such as INSERT, UPDATE or DELETE; or an SQL statement that returns nothing, such as a DDL statement.

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, this method is called on a closed Statement, the SQL statement returns a ResultSet object, the second argument supplied to this method is not a String array whose elements are valid column names, the method is called on a PreparedStatement or CallableStatement

SQLFeatureNotSupportedException - if the JDBC driver does not support this method

SQLTimeoutException - when the driver has determined that the timeout value that was specified by the setQueryTimeout method has been exceeded and has at least attempted to cancel the currently running Statement

Since:

1.4

execute

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, or an SQL statement able to return auto-generated keys (the list of such statements is vendor-specific).

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).

Note:This method cannot be called on a PreparedStatement or CallableStatement.

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, this method is called on a closed Statement, the second parameter supplied to this method is not Statement.RETURN_GENERATED_KEYS or Statement.NO_GENERATED_KEYS, the method is called on a PreparedStatement or CallableStatement

SQLFeatureNotSupportedException - if the JDBC driver does not support this method with a constant of Statement.RETURN_GENERATED_KEYS

SQLTimeoutException - when the driver has determined that the timeout value that was specified by the setQueryTimeout method has been exceeded and has at least attempted to cancel the currently running Statement

Since:

1.4

See Also:

• getResultSet()
• getUpdateCount()
• getMoreResults()
• getGeneratedKeys()

execute

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 SQL statement is not an INSERT statement, or an SQL statement able to return auto-generated keys (the list of such statements is vendor-specific).

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.

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).

Note:This method cannot be called on a PreparedStatement or CallableStatement.

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, this method is called on a closed Statement, the elements in the int array passed to this method are not valid column indexes, the method is called on a PreparedStatement or CallableStatement

SQLFeatureNotSupportedException - if the JDBC driver does not support this method

SQLTimeoutException - when the driver has determined that the timeout value that was specified by the setQueryTimeout method has been exceeded and has at least attempted to cancel the currently running Statement

Since:

1.4

See Also:

• getResultSet()
• getUpdateCount()
• getMoreResults()

execute

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 SQL statement is not an INSERT statement, or an SQL statement able to return auto-generated keys (the list of such statements is vendor-specific).

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).

Note:This method cannot be called on a PreparedStatement or CallableStatement.

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, this method is called on a closed Statement, the elements of the String array passed to this method are not valid column names, the method is called on a PreparedStatement or CallableStatement

SQLFeatureNotSupportedException - if the JDBC driver does not support this method

SQLTimeoutException - when the driver has determined that the timeout value that was specified by the setQueryTimeout method has been exceeded and has at least attempted to cancel the currently running Statement

Since:

1.4

See Also:

• getResultSet()
• getUpdateCount()
• getMoreResults()
• getGeneratedKeys()

getResultSetHoldability

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 or this method is called on a closed Statement

Since:

1.4

isClosed

boolean isClosed()
          throws SQLException

Retrieves whether this Statement object has been closed. A Statement is closed if the method close has been called on it, or if it is automatically closed.

Returns:

true if this Statement object is closed; false if it is still open

Throws:

SQLException - if a database access error occurs

Since:

1.6

setPoolable

void setPoolable(boolean poolable)
          throws SQLException

Requests that a Statement be pooled or not pooled. The value specified is a hint to the statement pool implementation indicating whether the application wants the statement to be pooled. It is up to the statement pool manager as to whether the hint is used.

The poolable value of a statement is applicable to both internal statement caches implemented by the driver and external statement caches implemented by application servers and other applications.

By default, a Statement is not poolable when created, and a PreparedStatement and CallableStatement are poolable when created.

Parameters:

poolable - requests that the statement be pooled if true and that the statement not be pooled if false

Throws:

SQLException - if this method is called on a closed Statement

Since:

1.6

isPoolable

boolean isPoolable()
            throws SQLException

Returns a value indicating whether the Statement is poolable or not.

Returns:

true if the Statement is poolable; false otherwise

Throws:

SQLException - if this method is called on a closed Statement

Since:

1.6

See Also:

• setPoolable(boolean)

closeOnCompletion

void closeOnCompletion()
                throws SQLException

Specifies that this Statement will be closed when all its dependent result sets are closed. If execution of the Statement does not produce any result sets, this method has no effect.

Note: Multiple calls to closeOnCompletion do not toggle the effect on this Statement. However, a call to closeOnCompletion does effect both the subsequent execution of statements, and statements that currently have open, dependent, result sets.

Throws:

SQLException - if this method is called on a closed Statement

Since:

1.7

isCloseOnCompletion

boolean isCloseOnCompletion()
                     throws SQLException

Returns a value indicating whether this Statement will be closed when all its dependent result sets are closed.

Returns:

true if the Statement will be closed when all of its dependent result sets are closed; false otherwise

Throws:

SQLException - if this method is called on a closed Statement

Since:

1.7

getLargeUpdateCount

default long getLargeUpdateCount()
                          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.

This method should be used when the returned row count may exceed Integer.MAX_VALUE.

The default implementation will throw UnsupportedOperationException

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 or this method is called on a closed Statement

Since:

1.8

See Also:

• execute(java.lang.String)

setLargeMaxRows

default void setLargeMaxRows(long max)
                      throws SQLException

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

This method should be used when the row limit may exceed Integer.MAX_VALUE.

The default implementation will throw UnsupportedOperationException

Parameters:

max - the new max rows limit; zero means there is no limit

Throws:

SQLException - if a database access error occurs, this method is called on a closed Statement or the condition max >= 0 is not satisfied

Since:

1.8

See Also:

• getMaxRows()

getLargeMaxRows

default long getLargeMaxRows()
                      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.

This method should be used when the returned row limit may exceed Integer.MAX_VALUE.

The default implementation will return 0

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 or this method is called on a closed Statement

Since:

1.8

See Also:

• setMaxRows(int)

executeLargeBatch

default long[] executeLargeBatch()
                          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 long 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 executeLargeBatch may be one of the following:

1. 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
2. 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.getLargeUpdateCounts will contain as many elements as there are commands in the batch, and at least one of the elements will be the following:

3. 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

This method should be used when the returned row count may exceed Integer.MAX_VALUE.

The default implementation will throw UnsupportedOperationException

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, this method is called on a closed Statement 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.

SQLTimeoutException - when the driver has determined that the timeout value that was specified by the setQueryTimeout method has been exceeded and has at least attempted to cancel the currently running Statement

Since:

1.8

See Also:

• addBatch(java.lang.String)
• DatabaseMetaData.supportsBatchUpdates()

executeLargeUpdate

default long executeLargeUpdate(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.

This method should be used when the returned row count may exceed Integer.MAX_VALUE.

Note:This method cannot be called on a PreparedStatement or CallableStatement.

The default implementation will throw UnsupportedOperationException

Parameters:

sql - an SQL Data Manipulation Language (DML) statement, such as INSERT, UPDATE or DELETE; or an SQL statement that returns nothing, such as a DDL statement.

Returns:

either (1) the row count for SQL Data Manipulation Language (DML) statements or (2) 0 for SQL statements that return nothing

Throws:

SQLException - if a database access error occurs, this method is called on a closed Statement, the given SQL statement produces a ResultSet object, the method is called on a PreparedStatement or CallableStatement

SQLTimeoutException - when the driver has determined that the timeout value that was specified by the setQueryTimeout method has been exceeded and has at least attempted to cancel the currently running Statement

Since:

1.8

executeLargeUpdate

default long executeLargeUpdate(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. The driver will ignore the flag if the SQL statement is not an INSERT statement, or an SQL statement able to return auto-generated keys (the list of such statements is vendor-specific).

This method should be used when the returned row count may exceed Integer.MAX_VALUE.

Note:This method cannot be called on a PreparedStatement or CallableStatement.

The default implementation will throw SQLFeatureNotSupportedException

Parameters:

sql - an SQL Data Manipulation Language (DML) statement, such as INSERT, UPDATE or DELETE; or an SQL statement that returns nothing, such as a DDL statement.

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 (1) the row count for SQL Data Manipulation Language (DML) statements or (2) 0 for SQL statements that return nothing

Throws:

SQLException - if a database access error occurs, this method is called on a closed Statement, the given SQL statement returns a ResultSet object, the given constant is not one of those allowed, the method is called on a PreparedStatement or CallableStatement

SQLFeatureNotSupportedException - if the JDBC driver does not support this method with a constant of Statement.RETURN_GENERATED_KEYS

SQLTimeoutException - when the driver has determined that the timeout value that was specified by the setQueryTimeout method has been exceeded and has at least attempted to cancel the currently running Statement

Since:

1.8

executeLargeUpdate

default long executeLargeUpdate(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. 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 SQL statement is not an INSERT statement, or an SQL statement able to return auto-generated keys (the list of such statements is vendor-specific).

This method should be used when the returned row count may exceed Integer.MAX_VALUE.

Note:This method cannot be called on a PreparedStatement or CallableStatement.

The default implementation will throw SQLFeatureNotSupportedException

Parameters:

sql - an SQL Data Manipulation Language (DML) statement, such as INSERT, UPDATE or DELETE; or an SQL statement that returns nothing, such as a DDL statement.

columnIndexes - an array of column indexes indicating the columns that should be returned from the inserted row

Returns:

either (1) the row count for SQL Data Manipulation Language (DML) statements or (2) 0 for SQL statements that return nothing

Throws:

SQLException - if a database access error occurs, this method is called on a closed Statement, the SQL statement returns a ResultSet object,the second argument supplied to this method is not an int array whose elements are valid column indexes, the method is called on a PreparedStatement or CallableStatement

SQLFeatureNotSupportedException - if the JDBC driver does not support this method

SQLTimeoutException - when the driver has determined that the timeout value that was specified by the setQueryTimeout method has been exceeded and has at least attempted to cancel the currently running Statement

Since:

1.8

executeLargeUpdate

default long executeLargeUpdate(String sql,
 String[] columnNames)
                         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. 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 SQL statement is not an INSERT statement, or an SQL statement able to return auto-generated keys (the list of such statements is vendor-specific).

This method should be used when the returned row count may exceed Integer.MAX_VALUE.

Note:This method cannot be called on a PreparedStatement or CallableStatement.

The default implementation will throw SQLFeatureNotSupportedException

Parameters:

sql - an SQL Data Manipulation Language (DML) statement, such as INSERT, UPDATE or DELETE; or an SQL statement that returns nothing, such as a DDL statement.

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, this method is called on a closed Statement, the SQL statement returns a ResultSet object, the second argument supplied to this method is not a String array whose elements are valid column names, the method is called on a PreparedStatement or CallableStatement

SQLFeatureNotSupportedException - if the JDBC driver does not support this method

SQLTimeoutException - when the driver has determined that the timeout value that was specified by the setQueryTimeout method has been exceeded and has at least attempted to cancel the currently running Statement

Since:

1.8

enquoteLiteral

default String enquoteLiteral(String val)
                       throws SQLException

Returns a String enclosed in single quotes. Any occurrence of a single quote within the string will be replaced by two single quotes.

Examples of the conversion:

Value	Result
Hello	'Hello'
G'Day	'G''Day'
'G''Day'	'''G''''Day'''
I'''M	'I''''''M'

Implementation Note:

JDBC driver implementations may need to provide their own implementation of this method in order to meet the requirements of the underlying datasource.

Parameters:

val - a character string

Returns:

A string enclosed by single quotes with every single quote converted to two single quotes

Throws:

NullPointerException - if val is null

SQLException - if a database access error occurs

Since:

9

enquoteIdentifier

default String enquoteIdentifier(String identifier,
 boolean alwaysQuote)
                          throws SQLException

Returns a SQL identifier. If identifier is a simple SQL identifier:

• Return the original value if alwaysQuote is false
• Return a delimited identifier if alwaysQuote is true

If identifier is not a simple SQL identifier, identifier will be enclosed in double quotes if not already present. If the datasource does not support double quotes for delimited identifiers, the identifier should be enclosed by the string returned from DatabaseMetaData.getIdentifierQuoteString(). If the datasource does not support delimited identifiers, a SQLFeatureNotSupportedException should be thrown.

A SQLException will be thrown if identifier contains any characters invalid in a delimited identifier or the identifier length is invalid for the datasource.

Implementation Requirements:

The default implementation uses the following criteria to determine a valid simple SQL identifier:

• The string is not enclosed in double quotes
• The first character is an alphabetic character from a through z, or from A through Z
• The name only contains alphanumeric characters or the character "_"

The default implementation will throw a SQLException if:

• identifier contains a null character or double quote and is not a simple SQL identifier.
• The length of identifier is less than 1 or greater than 128 characters

Examples of the conversion:

identifier	alwaysQuote	Result
Hello	false	Hello
Hello	true	"Hello"
G'Day	false	"G'Day"
"Bruce Wayne"	false	"Bruce Wayne"
"Bruce Wayne"	true	"Bruce Wayne"
GoodDay$	false	"GoodDay$"
Hello"World	false	SQLException
"Hello"World"	false	SQLException

Implementation Note:

JDBC driver implementations may need to provide their own implementation of this method in order to meet the requirements of the underlying datasource.

Parameters:

identifier - a SQL identifier

alwaysQuote - indicates if a simple SQL identifier should be returned as a quoted identifier

Returns:

A simple SQL identifier or a delimited identifier

Throws:

SQLException - if identifier is not a valid identifier

SQLFeatureNotSupportedException - if the datasource does not support delimited identifiers

NullPointerException - if identifier is null

Since:

9

isSimpleIdentifier

default boolean isSimpleIdentifier(String identifier)
                            throws SQLException

Retrieves whether identifier is a simple SQL identifier.

Implementation Requirements:

The default implementation uses the following criteria to determine a valid simple SQL identifier:

• The string is not enclosed in double quotes
• The first character is an alphabetic character from a through z, or from A through Z
• The string only contains alphanumeric characters or the character "_"
• The string is between 1 and 128 characters in length inclusive

Examples of the conversion:

identifier	Simple Identifier
Hello	true
G'Day	false
"Bruce Wayne"	false
GoodDay$	false
Hello"World	false
"Hello"World"	false

Implementation Note:

JDBC driver implementations may need to provide their own implementation of this method in order to meet the requirements of the underlying datasource.

Parameters:

identifier - a SQL identifier

Returns:

true if a simple SQL identifier, false otherwise

Throws:

NullPointerException - if identifier is null

SQLException - if a database access error occurs

Since:

9

enquoteNCharLiteral

default String enquoteNCharLiteral(String val)
                            throws SQLException

Returns a String representing a National Character Set Literal enclosed in single quotes and prefixed with a upper case letter N. Any occurrence of a single quote within the string will be replaced by two single quotes.

Examples of the conversion:

Value	Result
Hello	N'Hello'
G'Day	N'G''Day'
'G''Day'	N'''G''''Day'''
I'''M	N'I''''''M'
N'Hello'	N'N''Hello'''

Implementation Note:

JDBC driver implementations may need to provide their own implementation of this method in order to meet the requirements of the underlying datasource. An implementation of enquoteNCharLiteral may accept a different set of characters than that accepted by the same drivers implementation of enquoteLiteral.

Parameters:

val - a character string

Returns:

the result of replacing every single quote character in the argument by two single quote characters where this entire result is then prefixed with 'N'.

Throws:

NullPointerException - if val is null

SQLException - if a database access error occurs

Since:

9