Package org.h2.expression.function
Class SessionControlFunction
java.lang.Object
org.h2.expression.Expression
org.h2.expression.Operation1
org.h2.expression.function.Function1
org.h2.expression.function.SessionControlFunction
- All Implemented Interfaces:
NamedExpression
,HasSQL
,Typed
An ABORT_SESSION() or CANCEL_SESSION() function.
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Field Summary
FieldsModifier and TypeFieldDescriptionstatic final int
ABORT_SESSION().static final int
CANCEL_SESSION().private final int
private static final String[]
Fields inherited from class org.h2.expression.Operation1
arg, 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) Return the resulting value for the current row.boolean
isEverything
(ExpressionVisitor visitor) Check if this expression and all sub-expressions can fulfill a criteria.optimize
(SessionLocal session) Try to optimize the expression.Methods inherited from class org.h2.expression.function.Function1
getUnenclosedSQL
Methods inherited from class org.h2.expression.Operation1
getCost, getSubexpression, getSubexpressionCount, getType, 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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ABORT_SESSION
public static final int ABORT_SESSIONABORT_SESSION().- See Also:
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CANCEL_SESSION
public static final int CANCEL_SESSIONCANCEL_SESSION().- 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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SessionControlFunction
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Method Details
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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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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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isEverything
Description copied from class:Expression
Check if this expression and all sub-expressions can fulfill a criteria. If any part returns false, the result is false.- Overrides:
isEverything
in classOperation1
- Parameters:
visitor
- the visitor- Returns:
- if the criteria can be fulfilled
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getName
Description copied from interface:NamedExpression
Get the name.- Returns:
- the name in uppercase
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