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 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 occurred 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

      All Methods Instance Methods Abstract Methods Default Methods 
      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.

    • Field Detail

      • 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 Detail

      • 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()

      • 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:
        ValueResult
        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