Class StatementWrapper
- All Implemented Interfaces:
AutoCloseable
,Statement
,Wrapper
- Direct Known Subclasses:
PreparedStatementWrapper
The object used for executing a static SQL statement and obtaining the results produced by it.
Only one ResultSet
object per Statement
object can
be open at any point in 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 statement execute
methods implicitly close a statment's current ResultSet
object
if an open one exists.
- Version:
- $Revision: 1.4 $
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Field Summary
FieldsModifier and TypeFieldDescriptionprivate Connection
private Statement
private boolean
private final List
Fields inherited from interface java.sql.Statement
CLOSE_ALL_RESULTS, CLOSE_CURRENT_RESULT, EXECUTE_FAILED, KEEP_CURRENT_RESULT, NO_GENERATED_KEYS, RETURN_GENERATED_KEYS, SUCCESS_NO_INFO
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Constructor Summary
Constructors -
Method Summary
Modifier and TypeMethodDescriptionfinal void
Adds an SQL command to the current batch of commmands for thisStatement
object.final void
cancel()
Cancels thisStatement
object if both the DBMS and driver support aborting an SQL statement.protected final void
Check to see if the connection is still openfinal void
Makes the set of commands in the current batch empty.final void
Clears all the warnings reported on thisStatement
object.final void
close()
Releases thisStatement
object's database and JDBC resources immediately instead of waiting for this to happen when it is automatically closed.void
final boolean
Executes an SQL statement that may return multiple results.boolean
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
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
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.final int[]
Submits a batch of commands to the database for execution and if all commands execute successfully, returns an array of update counts.final ResultSet
executeQuery
(String sql) Executes an SQL statement that returns a singleResultSet
object.final int
executeUpdate
(String sql) Executes an SQLINSERT
,UPDATE
orDELETE
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 thisStatement
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.final Connection
Returns theConnection
object that produced thisStatement
object.final Statement
Return the statement that is wrappedfinal int
Retrieves the direction for fetching rows from database tables that is the default for result sets generated from thisStatement
object.final int
Retrieves the number of result set rows that is the default fetch size for result sets generated from thisStatement
object.Retrieves any auto-generated keys created as a result of executing thisStatement
object.final int
Returns the maximum number of bytes allowed for any column value.final int
Retrieves the maximum number of rows that aResultSet
object can contain.final boolean
Moves to aStatement
object's next result.boolean
getMoreResults
(int current) Moves to thisStatement
object's next result, deals with any currentResultSet
object(s) according to the instructions specified by the given flag, and returnstrue
if the next result is aResultSet
object.final int
Retrieves the number of seconds the driver will wait for aStatement
object to execute.final ResultSet
Returns the current result as aResultSet
object.final int
Retrieves the result set concurrency forResultSet
objects generated by thisStatement
object.int
Retrieves the result set holdability forResultSet
objects generated by thisStatement
object.final int
Retrieves the result set type forResultSet
objects generated by thisStatement
object.final int
Returns the current result as an update count; if the result is aResultSet
object or there are no more results, -1 is returned.final SQLWarning
Retrieves the first warning reported by calls on thisStatement
object.final boolean
isClosed()
Return true if this statement has been closedboolean
boolean
boolean
isWrapperFor
(Class<?> iface) final void
setConnection
(Connection connection) Set the connection that created this statementfinal void
setCursorName
(String name) Defines the SQL cursor name that will be used by subsequentStatement
objectexecute
methods.final void
setEscapeProcessing
(boolean enable) Sets escape processing on or off.final void
setFetchDirection
(int direction) Gives the driver a hint as to the direction in which the rows in a result set will be processed.final 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.final void
setMaxFieldSize
(int max) Sets the limit for the maximum number of bytes in a column to the given number of bytes.final void
setMaxRows
(int max) Sets the limit for the maximum number of rows that anyResultSet
object can contain to the given number.void
setPoolable
(boolean poolable) final void
setQueryTimeout
(int seconds) Sets the number of seconds the driver will wait for aStatement
object to execute to the given number of seconds.<T> T
protected final ResultSet
wrapResultSet
(ResultSet resultSet) Wrap the specified result set in a ResultSetWrapper object and return the wrapper.Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
Methods inherited from interface java.sql.Statement
enquoteIdentifier, enquoteLiteral, enquoteNCharLiteral, executeLargeBatch, executeLargeUpdate, executeLargeUpdate, executeLargeUpdate, executeLargeUpdate, getLargeMaxRows, getLargeUpdateCount, isSimpleIdentifier, setLargeMaxRows
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Field Details
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delegate_
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connection_
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isOpen_
private boolean isOpen_ -
openResultSets_
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Constructor Details
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StatementWrapper
Create a new wrapper- Parameters:
statement
- The statement that we are wrapping
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Method Details
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setConnection
Set the connection that created this statement- Parameters:
connection
- The connection
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setMaxFieldSize
Sets the limit for the maximum number of bytes in a column to the given number of bytes. This is the maximum number of bytes that can be returned for any column value. This limit applies only toBINARY
,VARBINARY
,LONGVARBINARY
,CHAR
,VARCHAR
, andLONGVARCHAR
fields. If the limit is exceeded, the excess data is silently discarded. For maximum portability, use values greater than 256.- Specified by:
setMaxFieldSize
in interfaceStatement
- Parameters:
max
- the new max column size limit; zero means unlimited- Throws:
SQLException
- if a database access error occurs
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setMaxRows
Sets the limit for the maximum number of rows that anyResultSet
object can contain to the given number. If the limit is exceeded, the excess rows are silently dropped.- Specified by:
setMaxRows
in interfaceStatement
- Parameters:
max
- the new max rows limit; zero means unlimited- Throws:
SQLException
- if a database access error occurs
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setEscapeProcessing
Sets escape processing on or off. If escape scanning is on (the default), the driver will do escape substitution before sending the SQL to the database. Note: Since prepared statements have usually been parsed prior to making this call, disabling escape processing for prepared statements will have no effect.- Specified by:
setEscapeProcessing
in interfaceStatement
- Parameters:
enable
-true
to enable;false
to disable- Throws:
SQLException
- if a database access error occurs
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setQueryTimeout
Sets the number of seconds the driver will wait for aStatement
object to execute to the given number of seconds. If the limit is exceeded, anSQLException
is thrown.- Specified by:
setQueryTimeout
in interfaceStatement
- Parameters:
seconds
- the new query timeout limit in seconds; zero means unlimited- Throws:
SQLException
- if a database access error occurs
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setCursorName
Defines the SQL cursor name that will be used by subsequentStatement
objectexecute
methods. This name can then be used in SQL positioned update/delete statements to identify the current row in theResultSet
object generated by this statement. If the database doesn't support positioned update/delete, this method is a noop. To insure that a cursor has the proper isolation level to support updates, the cursor'sSELECT
statement should be of the form 'select for update ...'. If the 'for update' phrase is omitted, positioned updates may fail.Note: By definition, positioned update/delete execution must be done by a different
Statement
object than the one which generated theResultSet
object being used for positioning. Also, cursor names must be unique within a connection.- Specified by:
setCursorName
in interfaceStatement
- Parameters:
name
- the new cursor name, which must be unique within a connection- Throws:
SQLException
- if a database access error occurs
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setFetchDirection
Gives the driver a hint as to the direction in which the rows in a result set will be processed. The hint applies only to result sets created using thisStatement
object. The default value isResultSet.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.- Specified by:
setFetchDirection
in interfaceStatement
- Parameters:
direction
- the initial direction for processing rows- Throws:
SQLException
- if a database access error occurs or the given direction is not one ofResultSet.FETCH_FORWARD
,ResultSet.FETCH_REVERSE
, orResultSet.FETCH_UNKNOWN
- Since:
- 1.2
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setFetchSize
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.- Specified by:
setFetchSize
in interfaceStatement
- Parameters:
rows
- the number of rows to fetch- Throws:
SQLException
- if a database access error occurs, or the condition 0 invalid input: '<'= rows invalid input: '<'= this.getMaxRows() is not satisfied.- Since:
- 1.2
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getDelegate
Return the statement that is wrapped- Returns:
- The wrapped statement
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isClosed
public final boolean isClosed()Return true if this statement has been closed -
getMaxFieldSize
Returns the maximum number of bytes allowed for any column value. This limit is the maximum number of bytes that can be returned for any column value. The limit applies only toBINARY
,VARBINARY
,LONGVARBINARY
,CHAR
,VARCHAR
, andLONGVARCHAR
columns. If the limit is exceeded, the excess data is silently discarded.- Specified by:
getMaxFieldSize
in interfaceStatement
- Returns:
- the current max column size limit; zero means unlimited
- Throws:
SQLException
- if a database access error occurs
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getMaxRows
Retrieves the maximum number of rows that aResultSet
object can contain. If the limit is exceeded, the excess rows are silently dropped.- Specified by:
getMaxRows
in interfaceStatement
- Returns:
- the current max row limit; zero means unlimited
- Throws:
SQLException
- if a database access error occurs
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getQueryTimeout
Retrieves the number of seconds the driver will wait for aStatement
object to execute. If the limit is exceeded, aSQLException
is thrown.- Specified by:
getQueryTimeout
in interfaceStatement
- Returns:
- the current query timeout limit in seconds; zero means unlimited
- Throws:
SQLException
- if a database access error occurs
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getWarnings
Retrieves the first warning reported by calls on thisStatement
object. SubsequentStatement
object warnings will be chained to thisSQLWarning
object.The warning chain is automatically cleared each time a statement is (re)executed.
Note: If you are processing a
ResultSet
object, any warnings associated with reads on thatResultSet
object will be chained on it.- Specified by:
getWarnings
in interfaceStatement
- Returns:
- the first
SQLWarning
object ornull
- Throws:
SQLException
- if a database access error occurs
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getResultSet
Returns the current result as aResultSet
object. This method should be called only once per result.- Specified by:
getResultSet
in interfaceStatement
- Returns:
- the current result as a
ResultSet
object;null
if the result is an update count or there are no more results - Throws:
SQLException
- if a database access error occurs
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getUpdateCount
Returns the current result as an update count; if the result is aResultSet
object or there are no more results, -1 is returned. This method should be called only once per result.- Specified by:
getUpdateCount
in interfaceStatement
- 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
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getMoreResults
Moves to aStatement
object's next result. It returnstrue
if this result is aResultSet
object. This method also implicitly closes any currentResultSet
object obtained with the methodgetResultSet
.There are no more results when the following is true:
(!getMoreResults() invalid input: '&'invalid input: '&' (getUpdateCount() == -1)
- Specified by:
getMoreResults
in interfaceStatement
- Returns:
true
if the next result is aResultSet
object;false
if it is an update count or there are no more results- Throws:
SQLException
- if a database access error occurs
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getFetchDirection
Retrieves the direction for fetching rows from database tables that is the default for result sets generated from thisStatement
object. If thisStatement
object has not set a fetch direction by calling the methodsetFetchDirection
, the return value is implementation-specific.- Specified by:
getFetchDirection
in interfaceStatement
- Returns:
- the default fetch direction for result sets generated from this
Statement
object - Throws:
SQLException
- if a database access error occurs- Since:
- 1.2
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getFetchSize
Retrieves the number of result set rows that is the default fetch size for result sets generated from thisStatement
object. If thisStatement
object has not set a fetch size by calling the methodsetFetchSize
, the return value is implementation-specific.- Specified by:
getFetchSize
in interfaceStatement
- Returns:
- the default fetch size for result sets generated from this
Statement
object - Throws:
SQLException
- if a database access error occurs- Since:
- 1.2
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getResultSetConcurrency
Retrieves the result set concurrency forResultSet
objects generated by thisStatement
object.- Specified by:
getResultSetConcurrency
in interfaceStatement
- Returns:
- either
ResultSet.CONCUR_READ_ONLY
orResultSet.CONCUR_UPDATABLE
- Throws:
SQLException
- If an error occurs- Since:
- 1.2
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getResultSetType
Retrieves the result set type forResultSet
objects generated by thisStatement
object.- Specified by:
getResultSetType
in interfaceStatement
- Returns:
- one of
ResultSet.TYPE_FORWARD_ONLY
,ResultSet.TYPE_SCROLL_INSENSITIVE
, orResultSet.TYPE_SCROLL_SENSITIVE
- Throws:
SQLException
- If an error occurs- Since:
- 1.2
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getConnection
Returns theConnection
object that produced thisStatement
object.- Specified by:
getConnection
in interfaceStatement
- Returns:
- the connection that produced this statement
- Throws:
SQLException
- if a database access error occurs- Since:
- 1.2
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executeQuery
Executes an SQL statement that returns a singleResultSet
object.- Specified by:
executeQuery
in interfaceStatement
- Parameters:
sql
- typically this is a static SQLSELECT
statement- Returns:
- a
ResultSet
object that contains the data produced by the given query; nevernull
- Throws:
SQLException
- if a database access error occurs
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executeUpdate
Executes an SQLINSERT
,UPDATE
orDELETE
statement. In addition, SQL statements that return nothing, such as SQL DDL statements, can be executed.- Specified by:
executeUpdate
in interfaceStatement
- Parameters:
sql
- an SQLINSERT
,UPDATE
orDELETE
statement or an SQL statement that returns nothing- Returns:
- either the row count for
INSERT
,UPDATE
orDELETE
statements, or 0 for SQL statements that return nothing - Throws:
SQLException
- if a database access error occurs
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close
Releases thisStatement
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.Note: A
Statement
object is automatically closed when it is garbage collected. When aStatement
object is closed, its currentResultSet
object, if one exists, is also closed.- Specified by:
close
in interfaceAutoCloseable
- Specified by:
close
in interfaceStatement
- Throws:
SQLException
- if a database access error occurs
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cancel
Cancels thisStatement
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.- Specified by:
cancel
in interfaceStatement
- Throws:
SQLException
- if a database access error occurs
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clearWarnings
Clears all the warnings reported on thisStatement
object. After a call to this method, the methodgetWarnings
will returnnull
until a new warning is reported for thisStatement
object.- Specified by:
clearWarnings
in interfaceStatement
- Throws:
SQLException
- if a database access error occurs
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execute
Executes an SQL statement that may return multiple results. 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 methodsexecute
,getMoreResults
,getResultSet
, andgetUpdateCount
let you navigate through multiple results. Theexecute
method executes an SQL statement and indicates the form of the first result. You can then use the methodsgetResultSet
orgetUpdateCount
to retrieve the result, andgetMoreResults
to move to any subsequent result(s).- Specified by:
execute
in interfaceStatement
- Parameters:
sql
- any SQL statement- Returns:
true
if the next result is aResultSet
object;false
if it is an update count or there are no more results- Throws:
SQLException
- if a database access error occurs
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addBatch
Adds an SQL command to the current batch of commmands for thisStatement
object. This method is optional.- Specified by:
addBatch
in interfaceStatement
- Parameters:
sql
- typically this is a static SQLINSERT
orUPDATE
statement- Throws:
SQLException
- if a database access error occurs, or the driver does not support batch statements- Since:
- 1.2
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clearBatch
Makes the set of commands in the current batch empty. This method is optional.- Specified by:
clearBatch
in interfaceStatement
- Throws:
SQLException
- if a database access error occurs or the driver does not support batch statements- Since:
- 1.2
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executeBatch
Submits a batch of commands to the database for execution and if all commands execute successfully, returns an array of update counts. Theint
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 methodexecuteBatch
may be one of the following:- A number greater than or equal to zero -- indicates that the command was processed successfully and is an update count giving the number of rows in the database that were affected by the command's execution
- A value of
-2
-- indicates that the command was processed successfully but that the number of rows affected is unknownIf 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 methodBatchUpdateException.getUpdateCounts
will contain as many elements as there are commands in the batch, and at least one of the elements will be the following: - A value of
-3
-- 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
object has been thrown.- Specified by:
executeBatch
in interfaceStatement
- Returns:
- an array of update counts containing one element for each command in the batch. The elements of the array are ordered according to the order in which commands were added to the batch.
- Throws:
SQLException
- if a database access error occurs or the driver does not support batch statements. Throws BatchUpdateException (a subclass ofSQLException
) if one of the commands sent to the database fails to execute properly or attempts to return a result set.- Since:
- 1.3
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checkIsOpen
Check to see if the connection is still open- Throws:
SQLException
- If an error occurs
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wrapResultSet
Wrap the specified result set in a ResultSetWrapper object and return the wrapper.- Parameters:
resultSet
- The object to be wrapped- Returns:
- The wrapper.
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getMoreResults
Moves to thisStatement
object's next result, deals with any currentResultSet
object(s) according to the instructions specified by the given flag, and returnstrue
if the next result is aResultSet
object.There are no more results when the following is true:
(!getMoreResults() invalid input: '&'invalid input: '&' (getUpdateCount() == -1)
- Specified by:
getMoreResults
in interfaceStatement
- Parameters:
current
- one of the followingStatement
constants indicating what should happen to currentResultSet
objects obtained using the methodgetResultSetinvalid input: '<'/code:
CLOSE_CURRENT_RESULT
,KEEP_CURRENT_RESULT
, orCLOSE_ALL_RESULTS
- Returns:
true
if the next result is aResultSet
object;false
if it is an update count or there are no more results- Throws:
SQLException
- if a database access error occurs- Since:
- 1.4
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getGeneratedKeys
Retrieves any auto-generated keys created as a result of executing thisStatement
object. If thisStatement
object did not generate any keys, an emptyResultSet
object is returned.- Specified by:
getGeneratedKeys
in interfaceStatement
- Returns:
- a
ResultSet
object containing the auto-generated key(s) generated by the execution of thisStatement
object - Throws:
SQLException
- if a database access error occurs- Since:
- java 1.4
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executeUpdate
Executes the given SQL statement and signals the driver with the given flag about whether the auto-generated keys produced by thisStatement
object should be made available for retrieval.- Specified by:
executeUpdate
in interfaceStatement
- Parameters:
sql
- must be an SQLINSERT
,UPDATE
orDELETE
statement or an SQL statement that returns nothingautoGeneratedKeys
- 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
orDELETE
statements, or0
for SQL statements that return nothing - Throws:
SQLException
- if a database access error occurs, the given SQL statement returns aResultSet
object, or the given constant is not one of those allowed- Since:
- java 1.4
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executeUpdate
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 anINSERT
statement.- Specified by:
executeUpdate
in interfaceStatement
- Parameters:
sql
- an SQLINSERT
,UPDATE
orDELETE
statement or an SQL statement that returns nothing, such as an SQL DDL statementcolumnIndexes
- an array of column indexes indicating the columns that should be returned from the inserted row- Returns:
- either the row count for
INSERT
,UPDATE
, orDELETE
statements, or 0 for SQL statements that return nothing - Throws:
SQLException
- if a database access error occurs or the SQL statement returns aResultSet
object- Since:
- java 1.4
-
executeUpdate
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 anINSERT
statement.- Specified by:
executeUpdate
in interfaceStatement
- Parameters:
sql
- an SQLINSERT
,UPDATE
orDELETE
statement or an SQL statement that returns nothingcolumnNames
- an array of the names of the columns that should be returned from the inserted row- Returns:
- either the row count for
INSERT
,UPDATE
, orDELETE
statements, or 0 for SQL statements that return nothing - Throws:
SQLException
- if a database access error occurs- Since:
- java 1.4
-
execute
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 anINSERT
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 methodsgetResultSet
orgetUpdateCount
to retrieve the result, andgetMoreResults
to move to any subsequent result(s).- Specified by:
execute
in interfaceStatement
- Parameters:
sql
- any SQL statementautoGeneratedKeys
- a constant indicating whether auto-generated keys should be made available for retrieval using the methodgetGeneratedKeys
; one of the following constants:Statement.RETURN_GENERATED_KEYS
orStatement.NO_GENERATED_KEYS
- Returns:
true
if the first result is aResultSet
object;false
if it is an update count or there are no results- Throws:
SQLException
- if a database access error occurs- Since:
- java 1.4
-
execute
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 anINSERT
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 methodsgetResultSet
orgetUpdateCount
to retrieve the result, andgetMoreResults
to move to any subsequent result(s).- Specified by:
execute
in interfaceStatement
- Parameters:
sql
- any SQL statementcolumnIndexes
- an array of the indexes of the columns in the inserted row that should be made available for retrieval by a call to the methodgetGeneratedKeys
- Returns:
true
if the first result is aResultSet
object;false
if it is an update count or there are no results- Throws:
SQLException
- if a database access error occurs- Since:
- java 1.4
-
execute
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 anINSERT
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 methodsgetResultSet
orgetUpdateCount
to retrieve the result, andgetMoreResults
to move to any subsequent result(s).- Specified by:
execute
in interfaceStatement
- Parameters:
sql
- any SQL statementcolumnNames
- an array of the names of the columns in the inserted row that should be made available for retrieval by a call to the methodgetGeneratedKeys
- Returns:
true
if the next result is aResultSet
object;false
if it is an update count or there are no more results- Throws:
SQLException
- if a database access error occurs- Since:
- java 1.4
-
getResultSetHoldability
Retrieves the result set holdability forResultSet
objects generated by thisStatement
object.- Specified by:
getResultSetHoldability
in interfaceStatement
- Returns:
- either
ResultSet.HOLD_CURSORS_OVER_COMMIT
orResultSet.CLOSE_CURSORS_AT_COMMIT
- Throws:
SQLException
- if a database access error occurs- Since:
- java 1.4
-
isCloseOnCompletion
- Specified by:
isCloseOnCompletion
in interfaceStatement
- Throws:
SQLException
-
closeOnCompletion
- Specified by:
closeOnCompletion
in interfaceStatement
- Throws:
SQLException
-
isPoolable
- Specified by:
isPoolable
in interfaceStatement
- Throws:
SQLException
-
setPoolable
- Specified by:
setPoolable
in interfaceStatement
- Throws:
SQLException
-
isWrapperFor
- Specified by:
isWrapperFor
in interfaceWrapper
- Throws:
SQLException
-
unwrap
- Specified by:
unwrap
in interfaceWrapper
- Throws:
SQLException
-