gudusoft.gsqlparser.nodes
Class TResultColumn

java.lang.Object
  extended by gudusoft.gsqlparser.nodes.TParseTreeNode
      extended by gudusoft.gsqlparser.nodes.TNodeWithAliasClause
          extended by gudusoft.gsqlparser.nodes.TResultColumn
All Implemented Interfaces:
Visitable

public class TResultColumn
extends TNodeWithAliasClause

This class represents select_list item in select statement, lets you specify the columns you want to retrieve from the table.

Syntax:

 query_name|[schema.]{table|view|materialized_view}|expr [ [AS] alias]
 

or, set column values in update_set_clause.

Syntax:

column = expr|(subquery) 

or, values clause in insert statement was represented by TResultColumnList.

Syntax:

(expr,expr) 


Constructor Summary
TResultColumn()
           
 
Method Summary
 void accept(TParseTreeVisitor v)
           
 void doParse(TCustomSqlStatement psql, ESqlClause plocation)
          analyze this node
 TExpression getExpr()
          column expression.
 TObjectName getFieldAttr()
           
 void init(java.lang.Object arg1)
          Initialize a query tree node.
 void init(java.lang.Object arg1, java.lang.Object arg2)
           
 boolean isPlaceHolder()
          this is true when there is no column names specified for fields in teradata insert statement
 void setPlaceHolder(boolean placeHolder)
           
 void TResultColumn()
           
 
Methods inherited from class gudusoft.gsqlparser.nodes.TNodeWithAliasClause
getAliasClause, setAliasClause, toString
 
Methods inherited from class gudusoft.gsqlparser.nodes.TParseTreeNode
addAllMyTokensToTokenList, getColumnNo, getDummyTag, getEndToken, getGsqlparser, getLineNo, getNodeType, getStartToken, init, init, init, init, setDummyTag, setEndToken, setEndToken, setGsqlparser, setNodeType, setStartToken, setStartToken, setString
 
Methods inherited from class java.lang.Object
equals, getClass, hashCode, notify, notifyAll, wait, wait, wait
 

Constructor Detail

TResultColumn

public TResultColumn()
Method Detail

TResultColumn

public void TResultColumn()

setPlaceHolder

public void setPlaceHolder(boolean placeHolder)

isPlaceHolder

public boolean isPlaceHolder()
this is true when there is no column names specified for fields in teradata insert statement

INSERT INTO employee (10005, 'Orebo B',300,,,, 'Nov 17 1957','M',,,18,);

Returns:

getExpr

public TExpression getExpr()
column expression. If there is only column name in a select_list item, then, this expr is type of TExpression.simpleObjectname,

Otherwise, it maybe a complex expr, you should check TExpression.getExpressionType().

for column values in update_set_clause, this expr is type of TExpression.ASSIGNMENT

Returns:

init

public void init(java.lang.Object arg1)
Description copied from class: TParseTreeNode
Initialize a query tree node.

Overrides:
init in class TParseTreeNode

init

public void init(java.lang.Object arg1,
                 java.lang.Object arg2)
Overrides:
init in class TParseTreeNode

doParse

public void doParse(TCustomSqlStatement psql,
                    ESqlClause plocation)
Description copied from class: TParseTreeNode
analyze this node

Overrides:
doParse in class TParseTreeNode

getFieldAttr

public TObjectName getFieldAttr()
Returns:
this is used to provide back compatibility of .NET version only.

accept

public void accept(TParseTreeVisitor v)
Specified by:
accept in interface Visitable
Overrides:
accept in class TParseTreeNode