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using System;
using System.Collections.Generic;
using System.Text;
using System.Data.Linq;
namespace System.Data.Linq.SqlClient {
internal class SqlAliaser {
Visitor visitor;
internal SqlAliaser() {
this.visitor = new Visitor();
}
internal SqlNode AssociateColumnsWithAliases(SqlNode node) {
return this.visitor.Visit(node);
}
class Visitor : SqlVisitor {
SqlAlias alias;
internal Visitor() {
}
internal override SqlAlias VisitAlias(SqlAlias sqlAlias) {
SqlAlias save = this.alias;
this.alias = sqlAlias;
sqlAlias.Node = this.Visit(sqlAlias.Node);
this.alias = save;
return sqlAlias;
}
internal override SqlRow VisitRow(SqlRow row) {
foreach (SqlColumn c in row.Columns) {
c.Alias = alias;
}
return base.VisitRow(row);
}
internal override SqlTable VisitTable(SqlTable tab) {
foreach (SqlColumn c in tab.Columns) {
c.Alias = alias;
}
return base.VisitTable(tab);
}
internal override SqlExpression VisitTableValuedFunctionCall(SqlTableValuedFunctionCall fc) {
foreach (SqlColumn c in fc.Columns) {
c.Alias = this.alias;
}
return base.VisitTableValuedFunctionCall(fc);
}
}
}
}
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