Package org.h2.mode
Class FunctionsDB2Derby
- 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.FunctionsDB2Derby
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- All Implemented Interfaces:
ExpressionWithVariableParameters
,NamedExpression
,HasSQL
,Typed
public final class FunctionsDB2Derby extends ModeFunction
Functions forMode.ModeEnum.DB2
andMode.ModeEnum.Derby
compatibility modes.
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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_VAL_LOCAL
private static TypeInfo
IDENTITY_VAL_LOCAL_TYPE
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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
FunctionsDB2Derby(FunctionInfo info)
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Method Summary
All Methods Static Methods Instance Methods Concrete Methods Modifier and Type Method Description static FunctionsDB2Derby
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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IDENTITY_VAL_LOCAL
private static final int IDENTITY_VAL_LOCAL
- See Also:
- Constant Field Values
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FUNCTIONS
private static final java.util.HashMap<java.lang.String,FunctionInfo> FUNCTIONS
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IDENTITY_VAL_LOCAL_TYPE
private static final TypeInfo IDENTITY_VAL_LOCAL_TYPE
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Constructor Detail
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FunctionsDB2Derby
private FunctionsDB2Derby(FunctionInfo info)
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Method Detail
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getFunction
public static FunctionsDB2Derby 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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