Package org.h2.expression.function
Class CompressFunction
java.lang.Object
org.h2.expression.Expression
org.h2.expression.Operation1_2
org.h2.expression.function.Function1_2
org.h2.expression.function.CompressFunction
- All Implemented Interfaces:
NamedExpression
,HasSQL
,Typed
A COMPRESS or EXPAND function.
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Field Summary
FieldsModifier and TypeFieldDescriptionstatic final int
COMPRESS() (non-standard).static final int
EXPAND() (non-standard).private final int
private static final String[]
Fields inherited from class org.h2.expression.Operation1_2
left, right, type
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
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Constructor Summary
Constructors -
Method Summary
Modifier and TypeMethodDescriptiongetName()
Get the name.getValue
(SessionLocal session, Value v1, Value v2) Returns the value of this function.optimize
(SessionLocal session) Try to optimize the expression.Methods inherited from class org.h2.expression.function.Function1_2
getUnenclosedSQL, getValue
Methods inherited from class org.h2.expression.Operation1_2
getCost, getSubexpression, getSubexpressionCount, getType, isEverything, mapColumns, setEvaluatable, updateAggregate
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
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
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Field Details
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COMPRESS
public static final int COMPRESSCOMPRESS() (non-standard).- See Also:
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EXPAND
public static final int EXPANDEXPAND() (non-standard).- See Also:
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NAMES
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function
private final int function
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Constructor Details
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CompressFunction
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Method Details
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getValue
Description copied from class:Function1_2
Returns the value of this function.- Overrides:
getValue
in classFunction1_2
- Parameters:
session
- the sessionv1
- the value of first argumentv2
- the value of second argument, ornull
- Returns:
- the resulting value
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optimize
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
Description copied from interface:NamedExpression
Get the name.- Returns:
- the name in uppercase
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