public override gsSelectColumn Parse()
{
gsSelectColumn selCol;
switch (_ScalarExpression.ColumnType)
{
case ColumnType.Regular:
if (_ScalarExpression.MultiPartIdentifier.Identifiers.Count == 1)
{
string columnName = _ScalarExpression.MultiPartIdentifier.Identifiers.First().Value;
selCol = new gsFieldColumn()
{
ColumnName = columnName,
ColumnAlias = ColumnAlias
};
}
else if (_ScalarExpression.MultiPartIdentifier.Identifiers.Count > 1)
{
string tableName = _ScalarExpression.MultiPartIdentifier.Identifiers[0].Value;
string columnName = _ScalarExpression.MultiPartIdentifier.Identifiers[1].Value;
selCol = new gsFieldColumn()
{
ColumnName = columnName,
ColumnAlias = ColumnAlias,
Table = new gsFromTerm {
TableName = tableName
}
};
}
else
{
throw new NotImplementedException("MultiPartIdentifier.Identifiers > 2 not supported");
}
break;
case ColumnType.Wildcard:
selCol = new gsFieldColumn()
{
ColumnName = "*",
ColumnAlias = ColumnAlias,
};
break;
default:
throw new NotImplementedException($"ColumnReferenceExpression {_ScalarExpression.ColumnType.ToString()} not supported");
}
return(selCol);
}
public override gsSelectColumn Parse()
{
gsSelectColumn selCol;
if (_Expression.Qualifier != null)
{
if (_Expression.Qualifier is MultiPartIdentifier)
{
if ((_Expression.Qualifier as MultiPartIdentifier).Identifiers.Count == 1)
{
string tableName = (_Expression.Qualifier as MultiPartIdentifier).Identifiers.First().Value;
selCol = new gsFieldColumn()
{
ColumnName = "*",
Table = new gsFromTerm {
TableName = tableName
}
};
}
else
{
throw new NotImplementedException("Expression.Qualifier.Identifiers.Count > 1 not supported");
}
}
else
{
throw new NotImplementedException($"Expression.Qualifier of type {_Expression.Qualifier.GetType().Name} not supported");
}
}
else
{
selCol = selCol = new gsFieldColumn()
{
ColumnName = "*",
};
}
return(selCol);
}