Package org.h2.expression.function
Class SubstringFunction
- java.lang.Object
-
- org.h2.expression.Expression
-
- org.h2.expression.OperationN
-
- org.h2.expression.function.FunctionN
-
- org.h2.expression.function.SubstringFunction
-
- All Implemented Interfaces:
ExpressionWithVariableParameters
,NamedExpression
,HasSQL
,Typed
public final class SubstringFunction extends FunctionN
A SUBSTRING function.
-
-
Field Summary
-
Fields inherited from class org.h2.expression.OperationN
args, argsCount, 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
-
-
Constructor Summary
Constructors Constructor Description SubstringFunction()
-
Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description java.lang.String
getName()
Get the name.java.lang.StringBuilder
getUnenclosedSQL(java.lang.StringBuilder builder, int sqlFlags)
Get the SQL statement of this expression.Value
getValue(SessionLocal session, Value v1, Value v2, Value v3)
Returns the value of this function.Expression
optimize(SessionLocal session)
Try to optimize the expression.-
Methods inherited from class org.h2.expression.OperationN
addParameter, doneWithParameters, getCost, getSubexpression, getSubexpressionCount, getType, isEverything, mapColumns, optimizeArguments, 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
-
-
-
-
Method Detail
-
getValue
public Value getValue(SessionLocal session, Value v1, Value v2, Value v3)
Description copied from class:FunctionN
Returns the value of this function.
-
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
-
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 classFunctionN
- Parameters:
builder
- string buildersqlFlags
- formatting flags- Returns:
- the specified string builder
-
getName
public java.lang.String getName()
Description copied from interface:NamedExpression
Get the name.- Returns:
- the name in uppercase
-
-