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java.lang.Objectorg.apache.derby.impl.sql.execute.NoRowsResultSetImpl
org.apache.derby.impl.sql.execute.MiscResultSet
class MiscResultSet
This is a wrapper class which invokes the Execution-time logic for Misc statements. The real Execution-time logic lives inside the executeConstantAction() method. Note that when re-using the language result set tree across executions (DERBY-827) it is not possible to store the ConstantAction as a member variable, because a re-prepare of the statement will invalidate the stored ConstantAction. Re-preparing a statement does not create a new Activation unless the GeneratedClass has changed, so the existing result set tree may survive a re-prepare.
Field Summary |
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Fields inherited from class org.apache.derby.impl.sql.execute.NoRowsResultSetImpl |
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activation, beginExecutionTime, beginTime, endExecutionTime, endTime, lcc |
Fields inherited from interface org.apache.derby.iapi.sql.ResultSet |
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CURRENT_RESULTSET_ONLY, ENTIRE_RESULTSET_TREE, ISAFTERLAST, ISBEFOREFIRST, ISFIRST, ISLAST |
Constructor Summary | |
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MiscResultSet(Activation activation)
Construct a MiscResultSet |
Method Summary | |
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void |
cleanUp()
No action is required, but not implemented in any base class |
void |
open()
Opens a MiscResultSet, executes the Activation's ConstantAction, and then immediately closes the MiscResultSet. |
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Constructor Detail |
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MiscResultSet(Activation activation)
activation
- Describes run-time environment.Method Detail |
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public void open() throws StandardException
StandardException
- Standard Derby error policy.public void cleanUp()
ResultSet.cleanUp()
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