public class Subquery extends Expression
Modifier and Type | Method and Description |
---|---|
int |
getCost()
Estimate the cost to process the expression.
|
int |
getDisplaySize()
Get the display size of this expression.
|
Expression[] |
getExpressionColumns(Session session)
If this expression consists of column expressions it should return them.
|
long |
getPrecision()
Get the precision of this expression.
|
Query |
getQuery() |
int |
getScale()
Get the scale of this expression.
|
String |
getSQL()
Get the SQL statement of this expression.
|
int |
getType()
Return the data type.
|
Value |
getValue(Session session)
Return the resulting value for the current row.
|
boolean |
isEverything(ExpressionVisitor visitor)
Check if this expression and all sub-expressions can fulfill a criteria.
|
void |
mapColumns(ColumnResolver resolver,
int level)
Map the columns of the resolver to expression columns.
|
Expression |
optimize(Session session)
Try to optimize the expression.
|
void |
setEvaluatable(TableFilter tableFilter,
boolean b)
Tell the expression columns whether the table filter can return values now.
|
void |
updateAggregate(Session session)
Update an aggregate value.
|
addFilterConditions, createIndexConditions, getAlias, getBooleanValue, getColumnName, getExpressionColumns, getNonAliasExpression, getNotIfPossible, getNullable, getSchemaName, getTableAlias, getTableName, isAutoIncrement, isConstant, isValueSet, isWildcard, toString
public Subquery(Query query)
public Value getValue(Session session)
Expression
getValue
in class Expression
session
- the sessionpublic int getType()
Expression
getType
in class Expression
public void mapColumns(ColumnResolver resolver, int level)
Expression
mapColumns
in class Expression
resolver
- the column resolverlevel
- the subquery nesting levelpublic Expression optimize(Session session)
Expression
optimize
in class Expression
session
- the sessionpublic void setEvaluatable(TableFilter tableFilter, boolean b)
Expression
setEvaluatable
in class Expression
tableFilter
- the table filterb
- true if the table filter can return valuepublic int getScale()
Expression
getScale
in class Expression
public long getPrecision()
Expression
getPrecision
in class Expression
public int getDisplaySize()
Expression
getDisplaySize
in class Expression
public String getSQL()
Expression
getSQL
in class Expression
public void updateAggregate(Session session)
Expression
updateAggregate
in class Expression
session
- the sessionpublic boolean isEverything(ExpressionVisitor visitor)
Expression
isEverything
in class Expression
visitor
- the visitorpublic Query getQuery()
public int getCost()
Expression
getCost
in class Expression
public Expression[] getExpressionColumns(Session session)
Expression
getExpressionColumns
in class Expression
session
- the sessionCopyright © 2012 JBoss by Red Hat. All Rights Reserved.