Package org.h2.expression.function
Class FileFunction
- java.lang.Object
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- org.h2.expression.Expression
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- org.h2.expression.Operation1_2
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- org.h2.expression.function.Function1_2
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- org.h2.expression.function.FileFunction
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- All Implemented Interfaces:
NamedExpression
,HasSQL
,Typed
public final class FileFunction extends Function1_2
A FILE_READ or FILE_WRITE function.
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Field Summary
Fields Modifier and Type Field Description static int
FILE_READ
FILE_READ() (non-standard).static int
FILE_WRITE
FILE_WRITE() (non-standard).private int
function
private static java.lang.String[]
NAMES
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Fields inherited from class org.h2.expression.Operation1_2
left, right, type
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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 FileFunction(Expression arg1, Expression arg2, int function)
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description java.lang.String
getName()
Get the name.Value
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.Expression
optimize(SessionLocal session)
Try to optimize the expression.-
Methods inherited from class org.h2.expression.function.Function1_2
getUnenclosedSQL, getValue
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Methods inherited from class org.h2.expression.Operation1_2
getCost, getSubexpression, getSubexpressionCount, getType, mapColumns, setEvaluatable, updateAggregate
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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, 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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Field Detail
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FILE_READ
public static final int FILE_READ
FILE_READ() (non-standard).- See Also:
- Constant Field Values
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FILE_WRITE
public static final int FILE_WRITE
FILE_WRITE() (non-standard).- See Also:
- Constant Field Values
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NAMES
private static final java.lang.String[] NAMES
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function
private final int function
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Constructor Detail
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FileFunction
public FileFunction(Expression arg1, Expression arg2, int function)
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Method Detail
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getValue
public Value getValue(SessionLocal session)
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
public Expression optimize(SessionLocal session)
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
public boolean isEverything(ExpressionVisitor visitor)
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
public java.lang.String getName()
Description copied from interface:NamedExpression
Get the name.- Returns:
- the name in uppercase
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