Package org.h2.expression.condition

Class ExistsPredicate

java.lang.Object

org.h2.expression.Expression

org.h2.expression.condition.Condition

org.h2.expression.condition.PredicateWithSubquery

org.h2.expression.condition.ExistsPredicate

All Implemented Interfaces:

HasSQL, Typed

public class ExistsPredicate
extends PredicateWithSubquery

Exists predicate as in EXISTS(SELECT ...)

Field Summary

Fields inherited from class org.h2.expression.condition.PredicateWithSubquery

query

Fields inherited from class org.h2.expression.Expression

AUTO_PARENTHESES, MAP_IN_AGGREGATE, MAP_IN_WINDOW, MAP_INITIAL, WITH_PARENTHESES, WITHOUT_PARENTHESES

Fields inherited from interface org.h2.util.HasSQL

ADD_PLAN_INFORMATION, DEFAULT_SQL_FLAGS, NO_CASTS, QUOTE_ONLY_WHEN_REQUIRED, REPLACE_LOBS_FOR_TRACE, TRACE_SQL_FLAGS

Constructor Summary

Constructors

Constructor	Description
ExistsPredicate(Query query)

Method Summary

Modifier and Type	Method	Description
StringBuilder	getUnenclosedSQL(StringBuilder builder, int sqlFlags)	Get the SQL statement of this expression.
Value	getValue(SessionLocal session)	Return the resulting value for the current row.

Methods inherited from class org.h2.expression.condition.PredicateWithSubquery

getCost, isEverything, mapColumns, optimize, setEvaluatable, updateAggregate

Methods inherited from class org.h2.expression.condition.Condition

castToBoolean, getType

Methods inherited from class org.h2.expression.Expression

addFilterConditions, createIndexConditions, getAlias, getBooleanValue, getColumnName, getColumnNameForView, getEnclosedSQL, getNonAliasExpression, getNotIfPossible, getNullable, getSchemaName, getSQL, getSQL, getSQL, getSQL, getSubexpression, getSubexpressionCount, getTableAlias, getTableName, getWhenSQL, getWhenValue, isConstant, isIdentity, isNullConstant, isValueSet, isWhenConditionOperand, needParentheses, optimizeCondition, toString, writeExpressions, writeExpressions

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.h2.util.HasSQL

getTraceSQL

Constructor Details

ExistsPredicate

public ExistsPredicate(Query query)

Method Details

getValue

public Value getValue(SessionLocal session)

Description copied from class: Expression

Return the resulting value for the current row.

Specified by:

getValue in class Expression

Parameters:

session - the session

Returns:

the result

getUnenclosedSQL

public StringBuilder getUnenclosedSQL(StringBuilder builder,
 int sqlFlags)

Description copied from class: Expression

Get the SQL statement of this expression. This may not always be the original SQL statement, especially after optimization. Enclosing '(' and ')' are never appended.

Overrides:

getUnenclosedSQL in class PredicateWithSubquery

Parameters:

builder - string builder

sqlFlags - formatting flags

Returns:

the specified string builder