Package org.h2.mode
Class FunctionsLegacy
- java.lang.Object
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- org.h2.expression.Expression
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- org.h2.expression.OperationN
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- org.h2.expression.function.FunctionN
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- org.h2.mode.ModeFunction
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- org.h2.mode.FunctionsLegacy
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- All Implemented Interfaces:
ExpressionWithVariableParameters
,NamedExpression
,HasSQL
,Typed
public class FunctionsLegacy extends ModeFunction
This class implements some legacy functions not available in Regular mode.
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Field Summary
Fields Modifier and Type Field Description private static java.util.HashMap<java.lang.String,FunctionInfo>
FUNCTIONS
private static int
IDENTITY
private static int
SCOPE_IDENTITY
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Fields inherited from class org.h2.mode.ModeFunction
info, VAR_ARGS
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Fields inherited from class org.h2.expression.OperationN
args, argsCount, 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 Modifier Constructor Description private
FunctionsLegacy(FunctionInfo info)
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Method Summary
All Methods Static Methods Instance Methods Concrete Methods Modifier and Type Method Description static FunctionsLegacy
getFunction(java.lang.String upperName)
Returns mode-specific function for a given name, ornull
.Value
getValue(SessionLocal session)
Return the resulting value for the current row.Expression
optimize(SessionLocal session)
Try to optimize the expression.-
Methods inherited from class org.h2.mode.ModeFunction
checkParameterCount, doneWithParameters, getArgumentsValues, getFunction, getName, getNullOrValue, isEverything, optimizeArguments
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Methods inherited from class org.h2.expression.function.FunctionN
getUnenclosedSQL, getValue
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Methods inherited from class org.h2.expression.OperationN
addParameter, getCost, getSubexpression, getSubexpressionCount, getType, mapColumns, optimizeArguments, 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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Field Detail
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FUNCTIONS
private static final java.util.HashMap<java.lang.String,FunctionInfo> FUNCTIONS
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IDENTITY
private static final int IDENTITY
- See Also:
- Constant Field Values
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SCOPE_IDENTITY
private static final int SCOPE_IDENTITY
- See Also:
- Constant Field Values
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Constructor Detail
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FunctionsLegacy
private FunctionsLegacy(FunctionInfo info)
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Method Detail
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getFunction
public static FunctionsLegacy getFunction(java.lang.String upperName)
Returns mode-specific function for a given name, ornull
.- Parameters:
upperName
- the upper-case name of a function- Returns:
- the function with specified name or
null
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getValue
public Value getValue(SessionLocal session)
Description copied from class:Expression
Return the resulting value for the current row.
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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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