gudusoft.gsqlparser.nodes

Class TExpressionCallTarget

java.lang.Object

gudusoft.gsqlparser.nodes.TParseTreeNode

gudusoft.gsqlparser.nodes.TExpressionCallTarget

All Implemented Interfaces:

Visitable

public class TExpressionCallTarget
extends TParseTreeNode

SQL Server value() Method performs an XQuery against the XML and returns a value of SQL type.

You typically use this method to extract a value from an XML instance stored in an xml type column, parameter, or variable.

This class represents an xml type column, parameter, variable or subquery.

     DECLARE @myDoc xml
      DECLARE @ProdID int
      SET @myDoc = '<Root>
     <ProductDescription ProductID="1" ProductName="Road Bike">
     <Features>
     <Warranty>1 year parts and labor
     <Maintenance>3 year parts and labor extended maintenance is available
     </Features>
     </ProductDescription>
     </Root>'
     SET @ProdID =  @myDoc.value('(/Root/ProductDescription/@ProductID)[1]', 'int' )
     SELECT @ProdID
 

In the above SQL, this class represents @myDoc before the value() function.

Constructor Summary

Constructors

Constructor and Description
TExpressionCallTarget()

Method Summary

Modifier and Type	Method and Description
void	accept(TParseTreeVisitor v) Accept a visitor
void	acceptChildren(TParseTreeVisitor v) Accept a visitor to iterate this class and sub-nodes of this class
void	doParse(TCustomSqlStatement psql, ESqlClause plocation) Analyze the sub-nodes inside this node.
TExpression	getExpr()
void	init(Object arg1) Initialize a query tree node.
void	setExpr(TExpression expr)

Methods inherited from class gudusoft.gsqlparser.nodes.TParseTreeNode

addAllMyTokensToTokenList, appendString, fastSetString, getColumnNo, getDummyTag, getEndToken, getGsqlparser, getLineNo, getNodeType, getStartToken, init, init, init, init, init, removeAllMyTokensFromTokenList, setDummyTag, setEndToken, setEndToken, setEndToken, setEndToken, setGsqlparser, setIncludingComment, setNodeType, setStartToken, setStartToken, setStartToken, setStartToken, setString, toScript, toString

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

TExpressionCallTarget

public TExpressionCallTarget()

Method Detail

setExpr

public void setExpr(TExpression expr)

getExpr

public TExpression getExpr()

doParse

public void doParse(TCustomSqlStatement psql,
                    ESqlClause plocation)

Description copied from class: TParseTreeNode

Analyze the sub-nodes inside this node. Such as build the relationship between table and column.

Overrides:

doParse in class TParseTreeNode

Parameters:

psql - SQL statement this node belongs to

plocation - SQL clause this node belongs to

accept

public void accept(TParseTreeVisitor v)

Description copied from class: TParseTreeNode

Accept a visitor

Specified by:

accept in interface Visitable

Overrides:

accept in class TParseTreeNode

Parameters:

v - visitor is a descendant class of TParseTreeVisitor

acceptChildren

public void acceptChildren(TParseTreeVisitor v)

Description copied from class: TParseTreeNode

Accept a visitor to iterate this class and sub-nodes of this class

Specified by:

acceptChildren in interface Visitable

Overrides:

acceptChildren in class TParseTreeNode

Parameters:

v - visitor is a descendant class of TParseTreeVisitor

init

public void init(Object arg1)

Description copied from class: TParseTreeNode

Initialize a query tree node. Used internally

Overrides:

init in class TParseTreeNode

Parameters:

arg1 - first argument