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java.lang.Objectunity.jdbc.UnityStatement
public class UnityStatement
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.
Connection.createStatement(),
ResultSet| Constructor Summary | |
|---|---|
UnityStatement(UnityConnection cnt,
int resultSetType,
int resultSetConcurrency,
GlobalSchema gs)
|
|
| Method Summary | |
|---|---|
void |
addBatch(java.lang.String sql)
Adds the given SQL command to the current list of commmands for this Statement object. |
void |
cancel()
Cancels this Statement object if both the DBMS and driver
support aborting an SQL statement. |
void |
clearBatch()
Empties this Statement object's current list of SQL
commands. |
void |
clearWarnings()
Clears all the warnings reported on this Statement object. |
void |
close()
Releases this Statement object's database and JDBC
resources immediately instead of waiting for this to happen when it is
automatically closed. |
boolean |
execute(java.lang.String sql)
Executes the given SQL statement, which may return multiple results. |
boolean |
execute(java.lang.String sql,
int autoGeneratedKeys)
Executes the given SQL statement, which may return multiple results, and signals the driver that any auto-generated keys should be made available for retrieval. |
boolean |
execute(java.lang.String sql,
int[] columnIndexes)
Executes the given SQL statement, which may return multiple results, and signals the driver that the auto-generated keys indicated in the given array should be made available for retrieval. |
boolean |
execute(java.lang.String sql,
java.lang.String[] columnNames)
Executes the given SQL statement, which may return multiple results, and signals the driver that the auto-generated keys indicated in the given array should be made available for retrieval. |
int[] |
executeBatch()
Submits a batch of commands to the database for execution and if all commands execute successfully, returns an array of update counts. |
java.sql.ResultSet |
executeByPassQuery(java.lang.String dbName,
java.lang.String sql)
Allows the execution of query on a single database given its name. |
int |
executeByPassUpdate(java.lang.String dbName,
java.lang.String sql)
Allows the execution of an update on a single database given its name. |
java.sql.ResultSet |
executeQuery(GlobalQuery gq)
|
java.sql.ResultSet |
executeQuery(java.lang.String semantic)
Executes the given SQL statement, which returns a single ResultSet object. |
int |
executeUpdate(java.lang.String sql)
Executes the given SQL statement, which may be an INSERT,
UPDATE, or DELETE statement or an
SQL statement that returns nothing, such as an SQL DDL statement. |
int |
executeUpdate(java.lang.String sql,
int autoGeneratedKeys)
Executes the given SQL statement and signals the driver with the given flag about whether the auto-generated keys produced by this Statement object should be made available for retrieval. |
int |
executeUpdate(java.lang.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(java.lang.String sql,
java.lang.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. |
java.sql.Connection |
getConnection()
Retrieves the Connection object that produced this
Statement object. |
int |
getFetchDirection()
Retrieves the direction for fetching rows from database tables that is the default for result sets generated from this Statement
object. |
int |
getFetchSize()
Retrieves the number of result set rows that is the default fetch size for ResultSet objects generated from this
Statement object. |
java.sql.ResultSet |
getGeneratedKeys()
Retrieves any auto-generated keys created as a result of executing this Statement object. |
int |
getMaxFieldSize()
Retrieves the maximum number of bytes that can be returned for character and binary column values in a ResultSet object produced by
this Statement object. |
int |
getMaxRows()
Retrieves the maximum number of rows that a ResultSet
object produced by this Statement object can contain. |
boolean |
getMoreResults()
Moves to this Statement object's next result, returns
true if it is a ResultSet object, and
implicitly closes any current ResultSet object(s) obtained
with the method getResultSet. |
boolean |
getMoreResults(int current)
Moves to this Statement object's next result, deals with
any current ResultSet object(s) according to the
instructions specified by the given flag, and returns true
if the next result is a ResultSet object. |
int |
getQueryTimeout()
Retrieves the number of seconds the driver will wait for a Statement object to execute. |
java.sql.ResultSet |
getResultSet()
Retrieves the current result as a ResultSet object. |
int |
getResultSetConcurrency()
Retrieves the result set concurrency for ResultSet objects
generated by this Statement object. |
int |
getResultSetHoldability()
Retrieves the result set holdability for ResultSet objects
generated by this Statement object. |
int |
getResultSetType()
Retrieves the result set type for ResultSet objects
generated by this Statement object. |
int |
getUpdateCount()
Retrieves the current result as an update count; if the result is a ResultSet object or there are no more results, -1 is
returned. |
java.sql.SQLWarning |
getWarnings()
Retrieves the first warning reported by calls on this Statement object. |
GlobalQuery |
parseQuery(java.lang.String sql)
Parses a query and builds a GlobalQuery object but does not execute it. |
void |
setCursorName(java.lang.String name)
Sets the SQL cursor name to the given String, which will
be used by subsequent Statement object
execute methods. |
void |
setEscapeProcessing(boolean enable)
Sets escape processing on or off. |
void |
setFetchDirection(int direction)
Gives the driver a hint as to the direction in which rows will be processed in ResultSet objects created using this
Statement object. |
void |
setFetchSize(int rows)
Gives the JDBC driver a hint as to the number of rows that should be fetched from the database when more rows are needed. |
void |
setMaxFieldSize(int max)
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)
Sets the limit for the maximum number of rows that any ResultSet object can contain to the given number. |
void |
setQueryTimeout(int seconds)
Sets the number of seconds the driver will wait for a Statement object to execute to the given number of
seconds. |
| Methods inherited from class java.lang.Object |
|---|
equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
| Constructor Detail |
|---|
public UnityStatement(UnityConnection cnt,
int resultSetType,
int resultSetConcurrency,
GlobalSchema gs)
| Method Detail |
|---|
public java.sql.ResultSet executeQuery(java.lang.String semantic)
throws java.sql.SQLException
ResultSet object. The code defaults to no multivalued
results for faster execution
executeQuery in interface java.sql.Statementsemantic - an SQL statement to be sent to the database, typically a
static SQL SELECT statement
ResultSet object that contains the data produced
by the given query; never null
java.sql.SQLException - if a database access error occurs or the given SQL
statement produces anything other than a single
ResultSet object
public int executeUpdate(java.lang.String sql)
throws java.sql.SQLException
INSERT,
UPDATE, or DELETE statement or an
SQL statement that returns nothing, such as an SQL DDL statement.
executeUpdate in interface java.sql.Statementsql - an SQL INSERT, UPDATE or
DELETE statement or an SQL statement that returns nothing
INSERT, UPDATE
or DELETE statements, or 0 for SQL statements
that return nothing
java.sql.SQLException - if a database access error occurs or the given
SQL statement produces a ResultSet object
or if the method has not yet been implemented.Connection.createStatement(int, int)
public void close()
throws java.sql.SQLException
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.
close in interface java.sql.Statementjava.sql.SQLException - if a database access error occurs
public int getMaxFieldSize()
throws java.sql.SQLException
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.
getMaxFieldSize in interface java.sql.Statementjava.sql.SQLException - if a database access error occurssetMaxFieldSize(int)
public void setMaxFieldSize(int max)
throws java.sql.SQLException
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.
setMaxFieldSize in interface java.sql.Statementmax - the new column size limit in bytes; zero means there is no
limit
java.sql.SQLException - if a database access error occurs or the condition max >=
0 is not satisfiedgetMaxFieldSize()
public int getMaxRows()
throws java.sql.SQLException
ResultSet
object produced by this Statement object can contain. If
this limit is exceeded, the excess rows are silently dropped.
getMaxRows in interface java.sql.StatementResultSet
object produced by this Statement object; zero
means there is no limit
java.sql.SQLException - if a database access error occurssetMaxRows(int)
public void setMaxRows(int max)
throws java.sql.SQLException
ResultSet object can contain to the given number. If the
limit is exceeded, the excess rows are silently dropped.
setMaxRows in interface java.sql.Statementmax - the new max rows limit; zero means there is no limit
java.sql.SQLException - if a database access error occurs or the condition max >=
0 is not satisfiedgetMaxRows()
public void setEscapeProcessing(boolean enable)
throws java.sql.SQLException
PreparedStatements objects will have no effect.
setEscapeProcessing in interface java.sql.Statementenable - true to enable escape processing;
false to disable it
java.sql.SQLException - if a database access error occurs
public int getQueryTimeout()
throws java.sql.SQLException
Statement object to execute. If the limit is exceeded, a
SQLException is thrown.
getQueryTimeout in interface java.sql.Statementjava.sql.SQLException - if a database access error occurssetQueryTimeout(int)
public void setQueryTimeout(int seconds)
throws java.sql.SQLException
Statement object to execute to the given number of
seconds. If the limit is exceeded, an SQLException is
thrown.
setQueryTimeout in interface java.sql.Statementseconds - the new query timeout limit in seconds; zero means there is no
limit
java.sql.SQLException - if a database access error occurs or the condition seconds >=
0 is not satisfiedgetQueryTimeout()
public void cancel()
throws java.sql.SQLException
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.
cancel in interface java.sql.Statementjava.sql.SQLException - if a database access error occurs
public java.sql.SQLWarning getWarnings()
throws java.sql.SQLException
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.
getWarnings in interface java.sql.StatementSQLWarning object or null
if there are no warnings
java.sql.SQLException - if a database access error occurs or this method is called
on a closed statement
public void clearWarnings()
throws java.sql.SQLException
Statement object.
After a call to this method, the method getWarnings will
return null until a new warning is reported for this
Statement object.
clearWarnings in interface java.sql.Statementjava.sql.SQLException - if a database access error occurs
public void setCursorName(java.lang.String name)
throws java.sql.SQLException
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.
setCursorName in interface java.sql.Statementname - the new cursor name, which must be unique within a connection
java.sql.SQLException - if a database access error occurs
public boolean execute(java.lang.String sql)
throws java.sql.SQLException
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).
execute in interface java.sql.Statementsql - any SQL statement
true if the first result is a
ResultSet object; false if it is an
update count or there are no results
java.sql.SQLException - if a database access error occursgetResultSet(),
getUpdateCount(),
getMoreResults()
public java.sql.ResultSet getResultSet()
throws java.sql.SQLException
ResultSet object. This
method should be called only once per result.
getResultSet in interface java.sql.StatementResultSet object or
null if the result is an update count or there are
no more results
java.sql.SQLException - if a database access error occursexecute(java.lang.String)
public int getUpdateCount()
throws java.sql.SQLException
ResultSet object or there are no more results, -1 is
returned. This method should be called only once per result.
getUpdateCount in interface java.sql.StatementResultSet object or there are no more results
java.sql.SQLException - if a database access error occursexecute(java.lang.String)
public boolean getMoreResults()
throws java.sql.SQLException
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)
getMoreResults in interface java.sql.Statementtrue if the next result is a
ResultSet object; false if it is an
update count or there are no more results
java.sql.SQLException - if a database access error occursexecute(java.lang.String)
public void setFetchDirection(int direction)
throws java.sql.SQLException
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.
setFetchDirection in interface java.sql.Statementdirection - the initial direction for processing rows
java.sql.SQLException - if a database access error occurs or the given direction
is not one of ResultSet.FETCH_FORWARD,
ResultSet.FETCH_REVERSE, or
ResultSet.FETCH_UNKNOWNgetFetchDirection()
public int getFetchDirection()
throws java.sql.SQLException
Statement
object. If this Statement object has not set a fetch
direction by calling the method setFetchDirection, the
return value is implementation-specific.
getFetchDirection in interface java.sql.StatementStatement object
java.sql.SQLException - if a database access error occurssetFetchDirection(int)
public void setFetchSize(int rows)
throws java.sql.SQLException
setFetchSize in interface java.sql.Statementrows - the number of rows to fetch
java.sql.SQLException - if a database access error occurs, or the condition 0 <=
rows <= this.getMaxRows() is
not satisfied.getFetchSize()
public int getFetchSize()
throws java.sql.SQLException
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.
getFetchSize in interface java.sql.StatementStatement object
java.sql.SQLException - if a database access error occurssetFetchSize(int)
public int getResultSetConcurrency()
throws java.sql.SQLException
ResultSet objects
generated by this Statement object.
getResultSetConcurrency in interface java.sql.StatementResultSet.CONCUR_READ_ONLY or
ResultSet.CONCUR_UPDATABLE
java.sql.SQLException - if a database access error occurs
public int getResultSetType()
throws java.sql.SQLException
ResultSet objects
generated by this Statement object.
getResultSetType in interface java.sql.StatementResultSet.TYPE_FORWARD_ONLY,
ResultSet.TYPE_SCROLL_INSENSITIVE, or
ResultSet.TYPE_SCROLL_SENSITIVE
java.sql.SQLException - if a database access error occurs
public void addBatch(java.lang.String sql)
throws java.sql.SQLException
Statement object. The commands in this list can be
executed as a batch by calling the method executeBatch.
NOTE: This method is optional.
addBatch in interface java.sql.Statementsql - typically this is a static SQL INSERT or
UPDATE statement
java.sql.SQLException - if a database access error occurs, or the driver does not
support batch updatesexecuteBatch()
public void clearBatch()
throws java.sql.SQLException
Statement object's current list of SQL
commands.
NOTE: This method is optional.
clearBatch in interface java.sql.Statementjava.sql.SQLException - if a database access error occurs or the driver does not
support batch updatesaddBatch(java.lang.String)
public int[] executeBatch()
throws java.sql.SQLException
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
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.
executeBatch in interface java.sql.Statementjava.sql.SQLException - if a database access error occurs or the driver does not
support batch statements. Throws
BatchUpdateException (a subclass of
SQLException) if one of the commands sent
to the database fails to execute properly or attempts to
return a result set.
public java.sql.Connection getConnection()
throws java.sql.SQLException
Connection object that produced this
Statement object.
getConnection in interface java.sql.Statementjava.sql.SQLException - if a database access error occurs
public boolean getMoreResults(int current)
throws java.sql.SQLException
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)
getMoreResults in interface java.sql.Statementcurrent - 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
true if the next result is a ResultSet
object; false if it is an update count or there are no
more results
java.sql.SQLException - if a database access error occursexecute(java.lang.String)
public java.sql.ResultSet getGeneratedKeys()
throws java.sql.SQLException
Statement object. If this Statement object
did not generate any keys, an empty ResultSet object is
returned.
getGeneratedKeys in interface java.sql.StatementResultSet object containing the auto-generated
key(s) generated by the execution of this Statement
object
java.sql.SQLException - if a database access error occurs
public int executeUpdate(java.lang.String sql,
int autoGeneratedKeys)
throws java.sql.SQLException
Statement object should be made available for retrieval.
executeUpdate in interface java.sql.Statementsql - must be an SQL INSERT, UPDATE
or DELETE 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
INSERT,
UPDATE or DELETE statements, or
0 for SQL statements that return nothing
java.sql.SQLException - if a database access error occurs, the given SQL statement
returns a ResultSet object, or the given
constant is not one of those allowed
public int executeUpdate(java.lang.String sql,
int[] columnIndexes)
throws java.sql.SQLException
INSERT statement.
executeUpdate in interface java.sql.Statementsql - an SQL INSERT, UPDATE or
DELETE 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
INSERT,
UPDATE, or DELETE statements, or 0
for SQL statements that return nothing
java.sql.SQLException - if a database access error occurs or the SQL statement
returns a ResultSet object
public int executeUpdate(java.lang.String sql,
java.lang.String[] columnNames)
throws java.sql.SQLException
INSERT statement.
executeUpdate in interface java.sql.Statementsql - an SQL INSERT, UPDATE or
DELETE statement or an SQL statement that
returns nothingcolumnNames - an array of the names of the columns that should be returned
from the inserted row
INSERT,
UPDATE, or DELETE statements, or 0
for SQL statements that return nothing
java.sql.SQLException - if a database access error occurs
public boolean execute(java.lang.String sql,
int autoGeneratedKeys)
throws java.sql.SQLException
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).
execute in interface java.sql.Statementsql - any SQL statementautoGeneratedKeys - 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
true if the first result is a
ResultSet object; false if it is an
update count or there are no results
java.sql.SQLException - if a database access error occursgetResultSet(),
getUpdateCount(),
getMoreResults(),
getGeneratedKeys()
public boolean execute(java.lang.String sql,
int[] columnIndexes)
throws java.sql.SQLException
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).
execute in interface java.sql.Statementsql - 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
method getGeneratedKeys
true if the first result is a
ResultSet object; false if it is an
update count or there are no results
java.sql.SQLException - if a database access error occursgetResultSet(),
getUpdateCount(),
getMoreResults()
public boolean execute(java.lang.String sql,
java.lang.String[] columnNames)
throws java.sql.SQLException
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).
execute in interface java.sql.Statementsql - 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 method
getGeneratedKeys
true if the next result is a
ResultSet object; false if it is an
update count or there are no more results
java.sql.SQLException - if a database access error occursgetResultSet(),
getUpdateCount(),
getMoreResults(),
getGeneratedKeys()
public int getResultSetHoldability()
throws java.sql.SQLException
ResultSet objects
generated by this Statement object.
getResultSetHoldability in interface java.sql.StatementResultSet.HOLD_CURSORS_OVER_COMMIT or
ResultSet.CLOSE_CURSORS_AT_COMMIT
java.sql.SQLException - if a database access error occurs
public java.sql.ResultSet executeByPassQuery(java.lang.String dbName,
java.lang.String sql)
throws java.sql.SQLException
java.sql.SQLException
public int executeByPassUpdate(java.lang.String dbName,
java.lang.String sql)
throws java.sql.SQLException
java.sql.SQLException
public GlobalQuery parseQuery(java.lang.String sql)
throws java.sql.SQLException
java.sql.SQLException
public java.sql.ResultSet executeQuery(GlobalQuery gq)
throws java.sql.SQLException
java.sql.SQLException
|
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