Package org.h2.expression.function
Class SignalFunction
- java.lang.Object
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- org.h2.expression.Expression
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- org.h2.expression.Operation2
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- org.h2.expression.function.Function2
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- org.h2.expression.function.SignalFunction
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- All Implemented Interfaces:
NamedExpression
,HasSQL
,Typed
public final class SignalFunction extends Function2
A SIGNAL function.
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Field Summary
Fields Modifier and Type Field Description private static java.util.regex.Pattern
SIGNAL_PATTERN
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Fields inherited from class org.h2.expression.Operation2
left, right, type
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Fields inherited from class org.h2.expression.Expression
AUTO_PARENTHESES, MAP_IN_AGGREGATE, MAP_IN_WINDOW, MAP_INITIAL, WITH_PARENTHESES, WITHOUT_PARENTHESES
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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
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Constructor Summary
Constructors Constructor Description SignalFunction(Expression arg1, Expression arg2)
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description java.lang.String
getName()
Get the name.Value
getValue(SessionLocal session, Value v1, Value v2)
Returns the value of this function.Expression
optimize(SessionLocal session)
Try to optimize the expression.-
Methods inherited from class org.h2.expression.function.Function2
getUnenclosedSQL, getValue
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Methods inherited from class org.h2.expression.Operation2
getCost, getSubexpression, getSubexpressionCount, getType, isEverything, mapColumns, setEvaluatable, updateAggregate
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Methods inherited from class org.h2.expression.Expression
addFilterConditions, createIndexConditions, getAlias, getBooleanValue, getColumnName, getColumnNameForView, getEnclosedSQL, getNonAliasExpression, getNotIfPossible, getNullable, getSchemaName, getSQL, getSQL, getSQL, getSQL, getTableAlias, getTableName, getWhenSQL, getWhenValue, isConstant, isIdentity, isNullConstant, isValueSet, isWhenConditionOperand, needParentheses, optimizeCondition, toString, writeExpressions, writeExpressions
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Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait
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Methods inherited from interface org.h2.util.HasSQL
getTraceSQL
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Constructor Detail
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SignalFunction
public SignalFunction(Expression arg1, Expression arg2)
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Method Detail
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getValue
public Value getValue(SessionLocal session, Value v1, Value v2)
Description copied from class:Function2
Returns the value of this function.
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optimize
public Expression optimize(SessionLocal session)
Description copied from class:Expression
Try to optimize the expression.- Specified by:
optimize
in classExpression
- Parameters:
session
- the session- Returns:
- the optimized expression
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getName
public java.lang.String getName()
Description copied from interface:NamedExpression
Get the name.- Returns:
- the name in uppercase
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