Package org.h2.expression.function
Class FileFunction
java.lang.Object
org.h2.expression.Expression
org.h2.expression.Operation1_2
org.h2.expression.function.Function1_2
org.h2.expression.function.FileFunction
- All Implemented Interfaces:
NamedExpression
,HasSQL
,Typed
A FILE_READ or FILE_WRITE function.
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Field Summary
FieldsModifier and TypeFieldDescriptionstatic final int
FILE_READ() (non-standard).static final int
FILE_WRITE() (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) 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_2
getUnenclosedSQL, getValue
Methods inherited from class org.h2.expression.Operation1_2
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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FILE_READ
public static final int FILE_READFILE_READ() (non-standard).- See Also:
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FILE_WRITE
public static final int FILE_WRITEFILE_WRITE() (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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FileFunction
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Method Details
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getValue
Description copied from class:Expression
Return the resulting value for the current row.- Overrides:
getValue
in classFunction1_2
- 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_2
- 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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