private OutputColumnDescriptor ResolveColumnReferenceCore(ColumnReferenceExpression node)
{
if (node.ColumnType != ColumnType.Regular)
{
throw new NotImplementedException(node.AsText());
}
if (node.MultiPartIdentifier.Count == 2)
{
// source (table/view) name without schema or alias
string sourceNameOrAlias = node.MultiPartIdentifier[0].Dequote();
string columnName = node.MultiPartIdentifier[1].Dequote();
return(TryResolveColumnReferenceCoreSN(node, sourceNameOrAlias, columnName));
}
else if (node.MultiPartIdentifier.Count == 1)
{
// no source only column name => traverse all source and find t
string columnName = node.MultiPartIdentifier[0].Dequote();
return(TryResolveColumnReferenceCoreSN(node, null, columnName));
}
else
{
// 3 or 4
throw new NotImplementedException(node.AsText() + " ## " + statement.WhatIsThis());
}
//return null;
}
private bool TryColumnReference(IQueryModel model, ColumnReferenceExpression node, out QueryColumnBase col)
{
if (node.ColumnType != ColumnType.Regular)
{
throw new NotImplementedException(node.AsText());
}
if (node.MultiPartIdentifier.Count == 2)
{
// source (table/view) name without schema or alias
string sourceNameOrAlias = node.MultiPartIdentifier[0].Dequote();
string columnName = node.MultiPartIdentifier[1].Dequote();
if (model.TryGetQueryOutputColumnByName(this.batchResolver, columnName, out col))
{
return(true);
}
else
{
throw new NotImplementedException(node.WhatIsThis()); // not resolved?
}
}
else if (node.MultiPartIdentifier.Count == 1)
{
// no source only column name => traverse all source and find t
string columnName = node.MultiPartIdentifier[0].Dequote();
if (model.TryGetQueryOutputColumnByName(this.batchResolver, columnName, out col))
{
return(true);
}
else
{
throw new NotImplementedException(node.WhatIsThis()); // not resolved?
}
}
else
{
// 3 or 4
throw new NotImplementedException(node.AsText() + " ## " + statement.WhatIsThis());
}
}
public override void ExplicitVisit(ColumnReferenceExpression node)
{
string columnName;
if (node.MultiPartIdentifier.Count == 1)
{
columnName = node.MultiPartIdentifier[0].Value;
}
else
{
throw new NotImplementedException(node.AsText());
}
cs.CodeExpression targetObject = new cs.CodeThisReferenceExpression();
this.lastExpression = new cs.CodeFieldReferenceExpression(targetObject, columnName);
}
