Package org.h2.expression.condition
Class UniquePredicate
java.lang.Object
org.h2.expression.Expression
org.h2.expression.condition.Condition
org.h2.expression.condition.PredicateWithSubquery
org.h2.expression.condition.UniquePredicate
Unique predicate as in UNIQUE(SELECT ...)
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Nested Class Summary
Nested Classes -
Field Summary
Fields inherited from class org.h2.expression.condition.PredicateWithSubquery
query
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 TypeMethodDescriptiongetUnenclosedSQL
(StringBuilder builder, int sqlFlags) Get the SQL statement of this expression.getValue
(SessionLocal session) Return the resulting value for the current row.optimize
(SessionLocal session) Try to optimize the expression.Methods inherited from class org.h2.expression.condition.PredicateWithSubquery
getCost, isEverything, mapColumns, setEvaluatable, updateAggregate
Methods inherited from class org.h2.expression.condition.Condition
castToBoolean, getType
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
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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Constructor Details
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UniquePredicate
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Method Details
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optimize
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
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
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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