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.
| Field Summary | |
|---|---|
| static final int |
The constant indicating that all ResultSet objects that
have previously been kept open should be closed when calling
getMoreResults.
|
| static final int |
The constant indicating that the current ResultSet object
should be closed when calling getMoreResults.
|
| static final int |
The constant indicating that an error occured while executing a batch statement. |
| static final int |
The constant indicating that the current ResultSet object
should not be closed when calling getMoreResults.
|
| static final int |
The constant indicating that generated keys should not be made available for retrieval. |
| static final int |
The constant indicating that generated keys should be made available for retrieval. |
| static final int |
The constant indicating that a batch statement executed successfully but that no count of the number of rows it affected is available. |
| Method Summary | |
|---|---|
| void |
Adds the given SQL command to the current list of commmands for this Statement object.
|
| void |
Cancels this Statement object if both the DBMS and
driver support aborting an SQL statement.
|
| void |
Empties this Statement object's current list of
SQL commands.
|
| void |
Clears all the warnings reported on this Statement
object.
|
| void |
Releases this Statement object's database
and JDBC resources immediately instead of waiting for
this to happen when it is automatically closed.
|
| boolean |
Executes the given SQL statement, which 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. |
| int[] |
Submits a batch of commands to the database for execution and if all commands execute successfully, returns an array of update counts. |
| ResultSet |
Executes the given SQL statement, which returns a single ResultSet object.
|
| int |
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 |
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 |
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 |
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 |
Retrieves the Connection object
that produced this Statement object.
|
| int |
Retrieves the direction for fetching rows from database tables that is the default for result sets generated from this Statement object.
|
| int |
Retrieves the number of result set rows that is the default fetch size for ResultSet objects
generated from this Statement object.
|
| ResultSet |
Retrieves any auto-generated keys created as a result of executing this Statement object.
|
| int |
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 |
Retrieves the maximum number of rows that a ResultSet object produced by this
Statement object can contain.
|
| boolean |
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 |
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 |
Retrieves the number of seconds the driver will wait for a Statement object to execute.
|
| ResultSet |
Retrieves the current result as a ResultSet object.
|
| int |
Retrieves the result set concurrency for ResultSet objects
generated by this Statement object.
|
| int |
Retrieves the result set holdability for ResultSet objects
generated by this Statement object.
|
| int |
Retrieves the result set type for ResultSet objects
generated by this Statement object.
|
| int |
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 |
Retrieves the first warning reported by calls on this Statement object.
|
| boolean |
Retrieves whether this Statement object has been closed.
|
| boolean |
Returns a value indicating whether the Statement
is poolable or not.
|
| void |
Sets the SQL cursor name to the given String, which
will be used by subsequent Statement object
execute methods.
|
| void |
Sets escape processing on or off. |
| void |
Gives the driver a hint as to the direction in which rows will be processed in ResultSet
objects created using this Statement object.
|
| void |
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 genrated by this Statement.
|
| void |
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 |
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 |
Requests that a Statement be pooled or not pooled.
|
| void |
Sets the number of seconds the driver will wait for a Statement object to execute to the given number of seconds.
|
| Methods inherited from java.sqlWrapper |
|---|
public static final
int
CLOSE_ALL_RESULTS
public static final
int
CLOSE_CURRENT_RESULT
ResultSet object
should be closed when calling getMoreResults.
public static final
int
EXECUTE_FAILED
public static final
int
KEEP_CURRENT_RESULT
ResultSet object
should not be closed when calling getMoreResults.
public static final
int
NO_GENERATED_KEYS
public static final
int
RETURN_GENERATED_KEYS
public static final
int
SUCCESS_NO_INFO
Statement object. The commands in this list can be
executed as a batch by calling the method executeBatch.
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. Statement object's current list of
SQL commands.
Statement
object. After a call to this method,
the method getWarnings will return
null until a new warning is reported for this
Statement object. 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.
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).
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).
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).
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).
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:
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:
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 proccess commands in a batch
update after a BatchUpdateException obejct has been thrown.
ResultSet object. INSERT,
UPDATE, or DELETE statement or an
SQL statement that returns nothing, such as an SQL DDL statement. 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). INSERT statement, or an SQL statement able to return
auto-generated keys (the list of such statements is vendor-specific). INSERT statement, or an SQL statement able to return
auto-generated keys (the list of such statements is vendor-specific). Connection object
that produced this Statement object. Statement object.
If this Statement object has not set
a fetch direction by calling the method setFetchDirection,
the return value is implementation-specific. 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. 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.
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. ResultSet object produced by this
Statement object can contain. If this limit is exceeded,
the excess rows are silently dropped. 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))
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))
Statement object to execute.
If the limit is exceeded, a
SQLException is thrown. ResultSet object.
This method should be called only once per result. ResultSet objects
generated by this Statement object. ResultSet objects
generated by this Statement object. ResultSet objects
generated by this Statement object. ResultSet object or there are no more results, -1
is returned. This method should be called only once per result. 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.
Statement object has been closed. A Statement is closed if the
method close has been called on it, or if it is automatically closed. Statement
is poolable or not.
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.
PreparedStatements objects will have no effect. 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.
ResultSet objects genrated by this Statement.
If the value specified is zero, then the hint is ignored.
The default value is zero. 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. ResultSet object generated by this Statement
object can contain to the given number.
If the limit is exceeded, the excess
rows are silently dropped. Statement be pooled or not pooled. The value
specified is a hint to the statement pool implementation indicating
whether the applicaiton 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.
Statement object to execute to the given number of seconds.
If the limit is exceeded, an SQLException is thrown. A JDBC
driver must apply this limit to the execute,
executeQuery and executeUpdate methods. JDBC driver
implementations may also apply this limit to ResultSet methods
(consult your driver vendor documentation for details).
ResultSetobjects that have previously been kept open should be closed when callinggetMoreResults.