Package org.h2.expression.condition
Class UniquePredicate
- java.lang.Object
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- org.h2.expression.Expression
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- org.h2.expression.condition.Condition
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- org.h2.expression.condition.PredicateWithSubquery
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- org.h2.expression.condition.UniquePredicate
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public class UniquePredicate extends PredicateWithSubquery
Unique predicate as in UNIQUE(SELECT ...)
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Nested Class Summary
Nested Classes Modifier and Type Class Description private static class
UniquePredicate.Target
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Field Summary
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Fields inherited from class org.h2.expression.condition.PredicateWithSubquery
query
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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 UniquePredicate(Query query)
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description java.lang.StringBuilder
getUnenclosedSQL(java.lang.StringBuilder builder, int sqlFlags)
Get the SQL statement of this expression.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.expression.condition.PredicateWithSubquery
getCost, isEverything, mapColumns, setEvaluatable, updateAggregate
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Methods inherited from class org.h2.expression.condition.Condition
castToBoolean, getType
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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, getSubexpression, getSubexpressionCount, 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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UniquePredicate
public UniquePredicate(Query query)
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Method Detail
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optimize
public Expression optimize(SessionLocal session)
Description copied from class:Expression
Try to optimize the expression.- Overrides:
optimize
in classPredicateWithSubquery
- Parameters:
session
- the session- Returns:
- the optimized expression
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getValue
public Value getValue(SessionLocal session)
Description copied from class:Expression
Return the resulting value for the current row.- Specified by:
getValue
in classExpression
- Parameters:
session
- the session- Returns:
- the result
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getUnenclosedSQL
public java.lang.StringBuilder getUnenclosedSQL(java.lang.StringBuilder builder, int sqlFlags)
Description copied from class:Expression
Get the SQL statement of this expression. This may not always be the original SQL statement, especially after optimization. Enclosing '(' and ')' are never appended.- Overrides:
getUnenclosedSQL
in classPredicateWithSubquery
- Parameters:
builder
- string buildersqlFlags
- formatting flags- Returns:
- the specified string builder
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