Class Condition

java.lang.Object

org.h2.expression.Expression

org.h2.expression.condition.Condition

All Implemented Interfaces:

HasSQL, Typed

Direct Known Subclasses:

BetweenPredicate, CompareLike, Comparison, ConditionAndOr, ConditionAndOrN, ConditionIn, ConditionInConstantSet, ConditionInParameter, ConditionLocalAndGlobal, ConditionNot, IsJsonPredicate, PredicateWithSubquery, SimplePredicate

abstract class Condition
extends Expression

Represents a condition returning a boolean value, or NULL.

Field Summary

Fields inherited from class Expression

AUTO_PARENTHESES, MAP_IN_AGGREGATE, MAP_IN_WINDOW, MAP_INITIAL, WITH_PARENTHESES, WITHOUT_PARENTHESES

Fields inherited from interface 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
Condition()

Method Summary

Modifier and Type	Method	Description
(package private) static Expression	castToBoolean(SessionLocal session, Expression expression)	Add a cast around the expression (if necessary) so that the type is boolean.
TypeInfo	getType()	Returns the data type.

Methods inherited from class Expression

addFilterConditions, createIndexConditions, getAlias, getBooleanValue, getColumnName, getColumnNameForView, getCost, getEnclosedSQL, getNonAliasExpression, getNotIfPossible, getNullable, getSchemaName, getSQL, getSQL, getSQL, getSQL, getSubexpression, getSubexpressionCount, getTableAlias, getTableName, getUnenclosedSQL, getValue, getWhenSQL, getWhenValue, isConstant, isEverything, isIdentity, isNullConstant, isValueSet, isWhenConditionOperand, mapColumns, needParentheses, optimize, optimizeCondition, setEvaluatable, toString, updateAggregate, writeExpressions, writeExpressions

Methods inherited from class Object

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

Methods inherited from interface HasSQL

getTraceSQL

Constructor Details

Condition

Condition()

Method Details

castToBoolean

static Expression castToBoolean(SessionLocal session,
 Expression expression)

Add a cast around the expression (if necessary) so that the type is boolean.

Parameters:

session - the session

expression - the expression

Returns:

the new expression

getType

public TypeInfo getType()

Description copied from class: Expression

Returns the data type. The data type may be unknown before the optimization phase.

Specified by:

getType in interface Typed

Specified by:

getType in class Expression

Returns:

the data type