Function excludedColumnRef

internal/sql/validate/insert_stmt.go:125–141

excludedColumnRef returns the column name if the ColumnRef is an EXCLUDED.col reference, and ok=true. Returns "", false otherwise.

(ref *ast.ColumnRef)

// excludedColumnRef returns the column name if the ColumnRef is an EXCLUDED.col
// reference, and ok=true. Returns "", false otherwise.
func excludedColumnRef(ref *ast.ColumnRef) (string, bool) {
	if ref.Fields == nil || len(ref.Fields.Items) != 2 {
		return "", false
	}

	first, ok := ref.Fields.Items[0].(*ast.String)
	if !ok || !strings.EqualFold(first.Str, excludedTable) {
		return "", false
	}

	second, ok := ref.Fields.Items[1].(*ast.String)
	if !ok {
		return "", false
	}

	return second.Str, true
}