net.ontopia.persistence.query.sql
Class RedundantTablesSQLOptimizer

java.lang.Object
  net.ontopia.persistence.query.sql.FilterSQLOptimizer
      net.ontopia.persistence.query.sql.RedundantTablesSQLOptimizer

public class RedundantTablesSQLOptimizer
extends FilterSQLOptimizer

INTERNAL: SQL optimizer that removes table- and column references that are redundant.

Field Summary

protected java.util.Map	cemap
protected java.util.Map	rcmap
protected java.util.Map	rtmap
protected java.util.Map	tcmap
protected java.util.Set	tvset

Constructor Summary

RedundantTablesSQLOptimizer()

Method Summary

protected void	addEntry(java.util.Map map, java.lang.Object key, java.lang.Object value)
protected void	addTableColumns(SQLExpressionIF expr, SQLColumns cols)
protected void	addTableVerbatim(SQLTable tbl)
protected SQLValueIF	filterValue(SQLValueIF value)
SQLQuery	optimize(SQLQuery query)

Methods inherited from class net.ontopia.persistence.query.sql.FilterSQLOptimizer

filterAggregate, filterAnd, filterColumns, filterEquals, filterExists, filterExpression, filterExpressions, filterFalse, filterFilter, filterFunction, filterIn, filterIsNull, filterJoin, filterLike, filterNot, filterNotEquals, filterNull, filterOr, filterOrderBy, filterParameter, filterPrimitive, filterSelect, filterSetOperation, filterTuple, filterValueExpression, filterValues, filterVerbatim, filterVerbatimExpression

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

tcmap

protected java.util.Map tcmap

cemap

protected java.util.Map cemap

tvset

protected java.util.Set tvset

rcmap

protected java.util.Map rcmap

rtmap

protected java.util.Map rtmap

Constructor Detail

RedundantTablesSQLOptimizer

public RedundantTablesSQLOptimizer()

Method Detail

optimize

public SQLQuery optimize(SQLQuery query)

Overrides:

optimize in class FilterSQLOptimizer

addTableVerbatim

protected void addTableVerbatim(SQLTable tbl)

addTableColumns

protected void addTableColumns(SQLExpressionIF expr,
                               SQLColumns cols)

addEntry

protected void addEntry(java.util.Map map,
                        java.lang.Object key,
                        java.lang.Object value)

filterValue

protected SQLValueIF filterValue(SQLValueIF value)

Overrides:

filterValue in class FilterSQLOptimizer