Remove unused variables in DatabaseMetaData
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Key: DERBY-1224
URL: http://issues.apache.org/jira/browse/DERBY-1224
Project: Derby
Type: Improvement
Components: JDBC, Network Client, Performance
Versions: 10.2.0.0
Reporter: Knut Anders Hatlen
Assigned to: Knut Anders Hatlen
Priority: Minor
org.apache.derby.client.am.DatabaseMetaData has a number of instance
variables which don't seem to have any purpose:
lastGetColumnPrivilegesResultSet_
lastGetColumnsResultSet_
lastGetForeignKeysResultSet_
lastGetPrimaryKeysResultSet_
lastGetProcedureColumnsResultSet_
lastGetProceduresResultSet_
lastGetSpecialColumnsResultSet_
lastGetStatisticsResultSet_
lastGetTablePrivilegesResultSet_
lastGetTablesResultSet_
lastGetUDTsResultSet_
lastGetTypeInfoResultSet_
lastGetAttrResultSet_
lastGetSuperTypesResultSet_
lastGetSuperTablesResultSet_
Each lastGetXXXResultSet_ variable is set when the corresponding
getXXX method is invoked. However, the variables are never read, so
they could just as well be removed. Removing them will reduce the
memory footprint.
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