org.hsqldb.jdbc

Class jdbcStatement

Implemented Interfaces:
Statement
Known Direct Subclasses:
jdbcPreparedStatement

public class jdbcStatement
extends java.lang.Object
implements Statement

<!-- start generic documentation --> The object used for executing a static SQL statement and returning the results it produces.

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

<!-- end generic documentation--> <!-- start release-specific documentation -->

HSQLDB-Specific Information:

JRE 1.1.x Notes:

In general, JDBC 2 support requires Java 1.2 and above, and JDBC3 requires Java 1.4 and above. In HSQLDB, support for methods introduced in different versions of JDBC depends on the JDK version used for compiling and building HSQLDB.

Since 1.7.0, all JDBC 2 methods can be called while executing under the version 1.1.x Java Runtime EnvironmentTM. However, in addition to this technique requiring explicit casts to the org.hsqldb.jdbcXXX classes, some of these method calls require int values that are defined only in the JDBC 2 or greater version of the ResultSet interface. For this reason these values are defined in jdbcResultSet.

In a JRE 1.1.x environment, calling JDBC 2 methods that take or return the JDBC2-only ResultSet values can be achieved by referring to them in parameter specifications and return value comparisons, respectively, as follows:

 jdbcResultSet.FETCH_FORWARD
 jdbcResultSet.TYPE_FORWARD_ONLY
 jdbcResultSet.TYPE_SCROLL_INSENSITIVE
 jdbcResultSet.CONCUR_READ_ONLY
 //etc.
 

However, please note that code written to use HSQLDB JDBC 2 features under JDK 1.1.x will not be compatible for use with other JDBC 2 drivers. Please also note that this feature is offered solely as a convenience to developers who must work under JDK 1.1.x due to operating constraints, yet wish to use some of the more advanced features available under the JDBC 2 specification.

(fredt@users)
(boucherb@users)

<!-- end release-specific documentation -->
Authors:
boucherb@users
fredt@user
See Also:
jdbcConnection.createStatement, jdbcResultSet

Method Summary

void
addBatch(String sql)
<!-- start generic documentation --> Adds the given SQL command to the current list of commmands for this Statement object.
void
cancel()
<!-- start generic documentation --> Cancels this Statement object if both the DBMS and driver support aborting an SQL statement.
void
clearBatch()
<!-- start generic documentation --> Empties this Statement object's current list of SQL commands.
void
clearWarnings()
<!-- start generic documentation --> Clears all the warnings reported on this Statement object.
void
close()
<!-- start generic documentation --> Releases this Statement object's database and JDBC resources immediately instead of waiting for this to happen when it is automatically closed.
boolean
execute(String sql)
<!-- start generic documentation --> Executes the given SQL statement, which may return multiple results.
boolean
execute(String sql, String[] columnNames)
<!-- start generic documentation --> 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, int autoGeneratedKeys)
<!-- start generic documentation --> 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)
<!-- start generic documentation --> 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()
<!-- start generic documentation --> Submits a batch of commands to the database for execution and if all commands execute successfully, returns an array of update counts.
ResultSet
executeQuery(String sql)
<!-- start generic documentation --> Executes the given SQL statement, which returns a single ResultSet object.
int
executeUpdate(String sql)
<!-- start generic documentation --> 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, String[] columnNames)
<!-- start generic documentation --> 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, int autoGeneratedKeys)
<!-- start generic documentation --> 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)
<!-- start generic documentation --> 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()
<!-- start generic documentation --> Retrieves the Connection object that produced this Statement object.
int
getFetchDirection()
<!-- start generic documentation --> Retrieves the direction for fetching rows from database tables that is the default for result sets generated from this Statement object.
int
getFetchSize()
<!-- start generic documentation --> Retrieves the number of result set rows that is the default fetch size for ResultSet objects generated from this Statement object.
ResultSet
getGeneratedKeys()
<!-- start generic documentation --> Retrieves any auto-generated keys created as a result of executing this Statement object.
int
getMaxFieldSize()
<!-- start generic documentation --> 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()
<!-- start generic documentation --> Retrieves the maximum number of rows that a ResultSet object produced by this Statement object can contain.
boolean
getMoreResults()
<!-- start generic documentation --> 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)
<!-- start generic documentation --> 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()
<!-- start generic documentation --> Retrieves the number of seconds the driver will wait for a Statement object to execute.
ResultSet
getResultSet()
<!-- start generic documentation --> Retrieves the current result as a ResultSet object.
int
getResultSetConcurrency()
<!-- start generic documentation --> Retrieves the result set concurrency for ResultSet objects generated by this Statement object.
int
getResultSetHoldability()
<!-- start generic documentation --> Retrieves the result set holdability for ResultSet objects generated by this Statement object.
int
getResultSetType()
<!-- start generic documentation --> Retrieves the result set type for ResultSet objects generated by this Statement object.
int
getUpdateCount()
<!-- start generic documentation --> 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()
<!-- start generic documentation --> Retrieves the first warning reported by calls on this Statement object.
void
setCursorName(String name)
<!-- start generic documentation --> Sets the SQL cursor name to the given String, which will be used by subsequent Statement object execute methods.
void
setEscapeProcessing(boolean enable)
<!-- start generic documentation --> Sets escape processing on or off.
void
setFetchDirection(int direction)
<!-- start generic documentation --> 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)
<!-- start generic documentation --> Gives the JDBC driver a hint as to the number of rows that should be fetched from the database when more rows are needed.
void
setMaxFieldSize(int max)
<!-- start generic documentation --> Sets the limit for the maximum number of bytes in a ResultSet column storing character or binary values to the given number of bytes.
void
setMaxRows(int max)
<!-- start generic documentation --> Sets the limit for the maximum number of rows that any ResultSet object can contain to the given number.
void
setQueryTimeout(int seconds)
<!-- start generic documentation --> Sets the number of seconds the driver will wait for a Statement object to execute to the given number of seconds.

Method Details

addBatch

public void addBatch(String sql)
            throws SQLException
<!-- start generic documentation --> Adds the given SQL command to the current list of commmands for this Statement object. The commands in this list can be executed as a batch by calling the method executeBatch.

NOTE: This method is optional.

<!-- end generic documentation --> <!-- start release-specific documentation -->

HSQLDB-Specific Information:

Starting with 1.7.2, this feature is supported.

<!-- end release-specific documentation -->
Parameters:
sql - typically this is a static SQL INSERT or UPDATE statement
Since:
JDK 1.2 (JDK 1.1.x developers: read the new overview for jdbcStatement)

cancel

public void cancel()
            throws SQLException
<!-- start generic documentation --> 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.

<!-- end generic documentation --> <!-- start release-specific documentation -->

HSQLDB-Specific Information:

Including 1.7.2, HSQLDB does not support aborting a SQL statement; calls to this method are ignored.

<!-- end release-specific documentation -->

clearBatch

public void clearBatch()
            throws SQLException
<!-- start generic documentation --> Empties this Statement object's current list of SQL commands.

NOTE: This method is optional.

<!-- start generic documentation --> <!-- start release-specific documentation -->

HSQLDB-Specific Information:

Starting with HSQLDB 1.7.2, this feature is supported.

<!-- end release-specific documentation -->
Since:
JDK 1.2 (JDK 1.1.x developers: read the new overview for jdbcStatement)

clearWarnings

public void clearWarnings()
            throws SQLException
<!-- start generic documentation --> 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.

<!-- end generic documentation --> <!-- start release-specific documentation -->

HSQLDB-Specific Information:

Including HSQLDB 1.7.2, SQLWarning objects are never produced for Statement Objects; calls to this method are ignored.

<!-- end release-specific documentation -->

close

public void close()
            throws SQLException
<!-- start generic documentation --> Releases this Statement object's database and JDBC resources immediately instead of waiting for this to happen when it is automatically closed. It is generally good practice to release resources as soon as you are finished with them to avoid tying up database resources.

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

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

<!-- end generic documentation -->


execute

public boolean execute(String sql)
            throws SQLException
<!-- start generic documentation --> 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).

<!-- end generic documentation -->

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

execute

public boolean execute(String sql,
                       String[] columnNames)
            throws SQLException
<!-- start generic documentation --> Executes the given SQL statement, which may return multiple results, and signals the driver that the auto-generated keys indicated in the given array should be made available for retrieval. This array contains the names of the columns in the target table that contain the auto-generated keys that should be made available. The driver will ignore the array if the given SQL statement is not an INSERT statement.

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).

<!-- end generic documentation --> <!-- start release-specific documentation -->

HSQLDB-Specific Information:

HSQLDB 1.7.2 does not support this feature.

Calling this method always throws an SQLException, stating that the function is not supported.

<!-- end release-specific documentation -->
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
Since:
JDK 1.4, HSQLDB 1.7

execute

public boolean execute(String sql,
                       int autoGeneratedKeys)
            throws SQLException
<!-- start generic documentation --> Executes the given SQL statement, which may return multiple results, and signals the driver that any auto-generated keys should be made available for retrieval. The driver will ignore this signal if the SQL statement is not an INSERT statement.

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

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).

<!-- end generic documentation --> <!-- start release-specific documentation -->

HSQLDB-Specific Information:

HSQLDB 1.7.2 does not support this feature.

Calling this method always throws an SQLException, stating that the function is not supported.

<!-- end release-specific documentation -->
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
Since:
JDK 1.4, HSQLDB 1.7

execute

public boolean execute(String sql,
                       int[] columnIndexes)
            throws SQLException
<!-- start generic documentation --> Executes the given SQL statement, which may return multiple results, and signals the driver that the auto-generated keys indicated in the given array should be made available for retrieval. This array contains the indexes of the columns in the target table that contain the auto-generated keys that should be made available. The driver will ignore the array if the given SQL statement is not an INSERT statement.

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

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).

<!-- end generic documentation --> <!-- start release-specific documentation -->

HSQLDB-Specific Information:

HSQLDB 1.7.2 does not support this feature.

Calling this method always throws an SQLException, stating that the function is not supported.

<!-- end release-specific documentation -->
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
Since:
JDK 1.4, HSQLDB 1.7

executeBatch

public int[] executeBatch()
            throws SQLException
<!-- start generic documentation --> 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

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

<!-- end generic documentation --> <!-- start release-specific documentation -->

HSQLDB-Specific Information:

Starting with HSQLDB 1.7.2, this feature is supported.

HSQLDB stops execution of commands in a batch when one of the commands results in an exception. The size of the returned array equals the number of commands that were executed successfully.

When the product is built under the JAVA1 target, an exception is never thrown and it is the responsibility of the client software to check the size of the returned update count array to determine if any batch items failed. To build and run under the JAVA2 target, JDK/JRE 1.3 or higher must be used.

<!-- end release-specific documentation -->
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.
Since:
JDK 1.3 (JDK 1.1.x developers: read the new overview for jdbcStatement)

executeQuery

public ResultSet executeQuery(String sql)
            throws SQLException
<!-- start generic documentation --> Executes the given SQL statement, which returns a single ResultSet object.

<!-- end generic documentation --> <!-- start release-specific documentation -->

HSQLDB-Specific Information:

This method should not be used for statements other than SELECT queries.

Including 1.7.2, HSQLDB does not throw an exception when the statement is a DDL statement or an UPDATE or DELETE statement. This will certainly change in future version.

<!-- end release-specific documentation -->
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

executeUpdate

public int executeUpdate(String sql)
            throws SQLException
<!-- start generic documentation --> 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.

<!-- end generic documentation -->

Parameters:
sql - an SQL INSERT, UPDATE or DELETE statement or an SQL statement that returns nothing
Returns:
either the row count for INSERT, UPDATE or DELETE statements, or 0 for SQL statements that return nothing

executeUpdate

public int executeUpdate(String sql,
                         String[] columnNames)
            throws SQLException
<!-- start generic documentation --> Executes the given SQL statement and signals the driver that the auto-generated keys indicated in the given array should be made available for retrieval. The driver will ignore the array if the SQL statement is not an INSERT statement.

<!-- end generic documentation --> <!-- start release-specific documentation -->

HSQLDB-Specific Information:

HSQLDB 1.7.2 does not support this feature.

Calling this method always throws an SQLException, stating that the function is not supported.

<!-- end release-specific documentation -->
Parameters:
sql - an SQL INSERT, UPDATE or DELETE statement or an SQL statement that returns nothing
columnNames - an array of the names of the columns that should be returned from the inserted row
Returns:
either the row count for INSERT, UPDATE, or DELETE statements, or 0 for SQL statements that return nothing
Since:
JDK 1.4, HSQLDB 1.7

executeUpdate

public int executeUpdate(String sql,
                         int autoGeneratedKeys)
            throws SQLException
<!-- start generic documentation --> 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.

<!-- end generic documentation --> <!-- start release-specific documentation -->

HSQLDB-Specific Information:

HSQLDB 1.7.2 does not support this feature.

Calling this method always throws an SQLException, stating that the function is not supported.

<!-- end release-specific documentation -->
Parameters:
sql - must be an SQL INSERT, UPDATE or DELETE statement or an SQL statement that returns nothing
autoGeneratedKeys - a flag indicating whether auto-generated keys should be made available for retrieval; one of the following constants: Statement.RETURN_GENERATED_KEYS Statement.NO_GENERATED_KEYS
Returns:
either the row count for INSERT, UPDATE or DELETE statements, or 0 for SQL statements that return nothing
Since:
JDK 1.4, HSQLDB 1.7

executeUpdate

public int executeUpdate(String sql,
                         int[] columnIndexes)
            throws SQLException
<!-- start generic documentation --> Executes the given SQL statement and signals the driver that the auto-generated keys indicated in the given array should be made available for retrieval. The driver will ignore the array if the SQL statement is not an INSERT statement.

<!-- end generic documentation --> <!-- start release-specific documentation -->

HSQLDB-Specific Information:

HSQLDB 1.7.2 does not support this feature.

Calling this method always throws an SQLException, stating that the function is not supported.

<!-- end release-specific documentation -->
Parameters:
sql - an SQL INSERT, UPDATE or DELETE statement or an SQL statement that returns nothing, such as an SQL DDL statement
columnIndexes - an array of column indexes indicating the columns that should be returned from the inserted row
Returns:
either the row count for INSERT, UPDATE, or DELETE statements, or 0 for SQL statements that return nothing
Since:
JDK 1.4, HSQLDB 1.7

getConnection

public Connection getConnection()
            throws SQLException
<!-- start generic documentation --> Retrieves the Connection object that produced this Statement object.

<!-- end generic documentation -->

Returns:
the connection that produced this statement
Since:
JDK 1.2 (JDK 1.1.x developers: read the new overview for jdbcStatement)

getFetchDirection

public int getFetchDirection()
            throws SQLException
<!-- start generic documentation --> 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.

<!-- end generic documentation --> <!-- start release-specific documentation -->

HSQLDB-Specific Information:

Including 1.7.2, HSQLDB always returns FETCH_FORWARD.

<!-- end release-specific documentation -->
Returns:
the default fetch direction for result sets generated from this Statement object
Since:
JDK 1.2 (JDK 1.1.x developers: read the new overview for jdbcStatement)

getFetchSize

public int getFetchSize()
            throws SQLException
<!-- start generic documentation --> 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.

<!-- end generic documentation --> <!-- start release-specific documentation -->

HSQLDB-Specific Information

Including 1.7.2, this method always returns 0. HSQLDB fetches each result completely as part of executing its statement

<!-- end release-specific documentation -->
Returns:
the default fetch size for result sets generated from this Statement object
Since:
JDK 1.2 (JDK 1.1.x developers: read the new overview for jdbcStatement)

getGeneratedKeys

public ResultSet getGeneratedKeys()
            throws SQLException
<!-- start generic documentation --> 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.

<!-- end generic documentation --> <!-- start release-specific documentation -->

HSQLDB-Specific Information:

HSQLDB 1.7.2 does not support this feature.

Calling this method always throws an SQLException, stating that the function is not supported.

<!-- end release-specific documentation -->
Returns:
a ResultSet object containing the auto-generated key(s) generated by the execution of this Statement object
Since:
JDK 1.4, HSQLDB 1.7

getMaxFieldSize

public int getMaxFieldSize()
            throws SQLException
<!-- start generic documentation --> Retrieves the maximum number of bytes that can be returned for character and binary column values in a ResultSet object produced by this Statement object. This limit applies only to BINARY, VARBINARY, LONGVARBINARY, CHAR, VARCHAR, and LONGVARCHAR columns. If the limit is exceeded, the excess data is silently discarded.

<!-- end generic documentation --> <!-- start release-specific documentation -->

HSQLDB-Specific Information:

Including 1.7.2, HSQLDB always returns zero, meaning there is no limit.

<!-- end release-specific documentation -->
Returns:
the current column size limit for columns storing character and binary values; zero means there is no limit

getMaxRows

public int getMaxRows()
            throws SQLException
<!-- start generic documentation --> 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.

<!-- start generic documentation -->

Returns:
the current maximum number of rows for a ResultSet object produced by this Statement object; zero means there is no limit

getMoreResults

public boolean getMoreResults()
            throws SQLException
<!-- start generic documentation --> Moves to this Statement object's next result, returns true if it is a ResultSet object, and implicitly closes any current ResultSet object(s) obtained with the method getResultSet.

There are no more results when the following is true:

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

<!-- end generic documentation -->

Returns:
true if the next result is a ResultSet object; false if it is an update count or there are no more results
See Also:
execute

getMoreResults

public boolean getMoreResults(int current)
            throws SQLException
<!-- start generic documentation --> Moves to this Statement object's next result, deals with any current ResultSet object(s) according to the instructions specified by the given flag, and returns true if the next result is a ResultSet object.

There are no more results when the following is true:

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

<!-- end generic documentation --> <!-- start release-specific documentation -->

HSQLDB-Specific Information:

HSQLDB 1.7.2 does not support this feature.

Calling this method always throws an SQLException, stating that the function is not supported.

<!-- end release-specific documentation -->
Parameters:
current - one of the following Statement constants indicating what should happen to current ResultSet objects obtained using the method getResultSetCLOSE_CURRENT_RESULT, KEEP_CURRENT_RESULT, or CLOSE_ALL_RESULTS
Returns:
true if the next result is a ResultSet object; false if it is an update count or there are no more results
Since:
JDK 1.4, HSQLDB 1.7
See Also:
execute

getQueryTimeout

public int getQueryTimeout()
            throws SQLException
<!-- start generic documentation --> Retrieves the number of seconds the driver will wait for a Statement object to execute. If the limit is exceeded, an SQLException is thrown.

<!-- end generic documentation --> <!-- start release-specific documentation -->

HSQLDB-Specific Information:

Including 1.7.2, HSQLDB always returns zero, meaning there is no limit.

<!-- end release-specific documentation -->
Returns:
the current query timeout limit in seconds; zero means there is no limit

getResultSet

public ResultSet getResultSet()
            throws SQLException
<!-- start generic documentation --> Retrieves the current result as a ResultSet object. This method should be called only once per result.

<!-- end generic documentation --> <!-- start release-specific documentation -->

HSQLDB-Specific Information:

Without an interceding call to executeXXX, each invocation of this method will produce a new, initialized ResultSet instance referring to the current result, if any.

<!-- end release-specific documentation -->
Returns:
the current result as a ResultSet object or null if the result is an update count or there are no more results
See Also:
execute

getResultSetConcurrency

public int getResultSetConcurrency()
            throws SQLException
<!-- start generic documentation --> Retrieves the result set concurrency for ResultSet objects generated by this Statement object.

<!-- end generic documentation --> <!-- start release-specific documentation -->

HSQLDB-Specific Information:

Including 1.7.2, HSQLDB supports only CONCUR_READ_ONLY concurrency.

<!-- end release-specific documentation -->
Returns:
either ResultSet.CONCUR_READ_ONLY or ResultSet.CONCUR_UPDATABLE (not supported)
Since:
JDK 1.2 (JDK 1.1.x developers: read the new overview for jdbcStatement)

getResultSetHoldability

public int getResultSetHoldability()
            throws SQLException
<!-- start generic documentation --> Retrieves the result set holdability for ResultSet objects generated by this Statement object.

<!-- end generic documentation --> <!-- start release-specific documentation -->

HSQLDB-Specific Information:

Starting with 1.7.2, this method returns HOLD_CURSORS_OVER_COMMIT

<!-- end release-specific documentation -->
Returns:
either ResultSet.HOLD_CURSORS_OVER_COMMIT or ResultSet.CLOSE_CURSORS_AT_COMMIT
Since:
JDK 1.4, HSQLDB 1.7

getResultSetType

public int getResultSetType()
            throws SQLException
<!-- start generic documentation --> Retrieves the result set type for ResultSet objects generated by this Statement object.

<!-- end generic documentation --> <!-- start release-specific documentation -->

HSQLDB-Specific Information:

HSQLDB 1.7.0 and later versions support TYPE_FORWARD_ONLY and TYPE_SCROLL_INSENSITIVE.

<!-- end release-specific documentation -->
Returns:
one of ResultSet.TYPE_FORWARD_ONLY, ResultSet.TYPE_SCROLL_INSENSITIVE, or ResultSet.TYPE_SCROLL_SENSITIVE (not supported)

Note: Up to and including 1.7.1, HSQLDB never returns TYPE_SCROLL_SENSITIVE

Since:
JDK 1.2 (JDK 1.1.x developers: read the new overview for jdbcStatement)

getUpdateCount

public int getUpdateCount()
            throws SQLException
<!-- start generic documentation --> 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.

<!-- end generic documentation -->

Returns:
the current result as an update count; -1 if the current result is a ResultSet object or there are no more results
See Also:
execute

getWarnings

public SQLWarning getWarnings()
            throws SQLException
<!-- start generic documentation --> 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.

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HSQLDB-Specific Information:

Including 1.7.2, HSQLDB never produces Statement warnings; this method always returns null.

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Returns:
the first SQLWarning object or null if there are no warnings

setCursorName

public void setCursorName(String name)
            throws SQLException
<!-- start generic documentation --> 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.

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HSQLDB-Specific Information:

Including 1.7.2, HSQLDB does not support named cursors, updateable results or table locking via SELECT FOR UPDATE; calls to this method are ignored.

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Parameters:
name - the new cursor name, which must be unique within a connection

setEscapeProcessing

public void setEscapeProcessing(boolean enable)
            throws SQLException
<!-- start generic documentation --> Sets escape processing on or off. If escape scanning is on (the default), the driver will do escape substitution before sending the SQL statement to the database. Note: Since prepared statements have usually been parsed prior to making this call, disabling escape processing for PreparedStatements objects will have no effect.

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Parameters:
enable - true to enable escape processing; false to disable it

setFetchDirection

public void setFetchDirection(int direction)
            throws SQLException
<!-- start generic documentation --> 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.

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HSQLDB-Specific Information:

Including 1.7.2, HSQLDB supports only FETCH_FORWARD.

Setting any other value will throw an SQLException stating that the operation is not supported.

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Parameters:
direction - the initial direction for processing rows
Since:
JDK 1.2 (JDK 1.1.x developers: read the new overview for jdbcStatement)

setFetchSize

public void setFetchSize(int rows)
            throws SQLException
<!-- start generic documentation --> Gives the JDBC driver a hint as to the number of rows that should be fetched from the database when more rows are needed. The number of rows specified affects only result sets created using this statement. If the value specified is zero, then the hint is ignored. The default value is zero.

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HSQLDB-Specific Information:

Including 1.7.2, calls to this method are ignored; HSQLDB fetches each result completely as part of executing its statement.

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Parameters:
rows - the number of rows to fetch
Since:
JDK 1.2 (JDK 1.1.x developers: read the new overview for jdbcStatement)

setMaxFieldSize

public void setMaxFieldSize(int max)
            throws SQLException
<!-- start generic documentation --> Sets the limit for the maximum number of bytes in a ResultSet column storing character or binary values to the given number of bytes. This limit applies only to BINARY, VARBINARY, LONGVARBINARY, CHAR, VARCHAR, and LONGVARCHAR fields. If the limit is exceeded, the excess data is silently discarded. For maximum portability, use values greater than 256.

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HSQLDB-Specific Information:

Including 1.7.2, calls to this method are simply ignored; HSQLDB always stores the full number of bytes when dealing with any of the field types mentioned above. These types all have an absolute maximum element upper bound determined by the Java array index limit java.lang.Integer.MAX_VALUE. For XXXBINARY types, this translates to Integer.MAX_VALUE bytes. For XXXCHAR types, this translates to 2 * Integer.MAX_VALUE bytes (2 bytes / character)

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Parameters:
max - the new column size limit in bytes; zero means there is no limit

setMaxRows

public void setMaxRows(int max)
            throws SQLException
<!-- start generic documentation --> Sets the limit for the maximum number of rows that any ResultSet object can contain to the given number. If the limit is exceeded, the excess rows are silently dropped.

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

setQueryTimeout

public void setQueryTimeout(int seconds)
            throws SQLException
<!-- start generic documentation --> Sets the number of seconds the driver will wait for a Statement object to execute to the given number of seconds. If the limit is exceeded, an SQLException is thrown.

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HSQLDB-Specific Information:

Including 1.7.2, calls to this method are ignored; HSQLDB waits an unlimited amount of time for statement execution requests to return.

<!-- end release-specific documentation -->
Parameters:
seconds - the new query timeout limit in seconds; zero means there is no limit

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