RedundantTablesSQLOptimizer (Ontopia)

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

Fields
Modifier and Type Field Description

protected Map cemap

protected Map rcmap

protected Map rtmap

protected Map tcmap

protected Set tvset

Constructor Summary

Constructors
Constructor Description

RedundantTablesSQLOptimizer()

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`protected void`	`addEntry(Map map, Object key, 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 Map tcmap
```

cemap
```
protected Map cemap
```

tvset
```
protected Set tvset
```

rcmap
```
protected Map rcmap
```

rtmap
```
protected 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(Map map,
                        Object key,
                        Object value)

filterValue

protected SQLValueIF filterValue(SQLValueIF value)

Overrides:: filterValue in class FilterSQLOptimizer