func (s *Server) processColumns(desc *structured.TableDescriptor,
node parser.Columns) ([]structured.ColumnDescriptor, error) {
if node == nil {
return desc.Columns, nil
}
cols := make([]structured.ColumnDescriptor, len(node))
for i, n := range node {
switch nt := n.(type) {
case *parser.StarExpr:
return s.processColumns(desc, nil)
case *parser.NonStarExpr:
switch et := nt.Expr.(type) {
case *parser.ColName:
// TODO(pmattis): If et.Qualifier is not empty, verify it matches the
// table name.
var err error
col, err := desc.FindColumnByName(et.Name)
if err != nil {
return nil, err
}
cols[i] = *col
default:
return nil, fmt.Errorf("unexpected node: %T", nt.Expr)
}
}
}
return cols, nil
}
func (p *planner) processColumns(desc *structured.TableDescriptor,
node parser.QualifiedNames) ([]structured.ColumnDescriptor, error) {
if node == nil {
return desc.Columns, nil
}
cols := make([]structured.ColumnDescriptor, len(node))
for i, n := range node {
// TODO(pmattis): If the name is qualified, verify the table name matches
// desc.Name.
var err error
col, err := desc.FindColumnByName(n.Column())
if err != nil {
return nil, err
}
cols[i] = *col
}
return cols, nil
}
