示例#1
0
func (m *filterQLParser) parseFilterClause(depth int, negate bool) (*FilterExpr, error) {

	fe := NewFilterExpr()
	fe.Negate = negate
	//u.Debugf("%d filterclause? negate?%v  cur=%v", depth, negate, m.Cur())

	switch m.Cur().T {
	case lex.TokenInclude:
		// embed/include a named filter

		m.Next()
		//u.Infof("type %v", m.Cur())
		if m.Cur().T != lex.TokenIdentity && m.Cur().T != lex.TokenValue {
			return nil, fmt.Errorf("Expected identity for Include but got %v", m.Cur())
		}
		fe.Include = m.Cur().V
		m.Next()

	case lex.TokenUdfExpr:
		// we have a udf/functional expression filter
		tree := expr.NewTree(m.filterTokenPager)
		if err := m.parseNode(tree); err != nil {
			u.Errorf("could not parse: %v", err)
			return nil, err
		}
		fe.Expr = tree.Root

	case lex.TokenIdentity, lex.TokenLike, lex.TokenExists, lex.TokenBetween,
		lex.TokenIN, lex.TokenIntersects, lex.TokenValue, lex.TokenContains:

		if m.Cur().T == lex.TokenIdentity {
			if strings.ToLower(m.Cur().V) == "include" {
				// TODO:  this is a bug in lexer ...
				// embed/include a named filter
				m.Next()
				if m.Cur().T != lex.TokenIdentity && m.Cur().T != lex.TokenValue {
					return nil, fmt.Errorf("Expected identity for Include but got %v", m.Cur())
				}
				fe.Include = m.Cur().V
				m.Next()
				return fe, nil
			}
		}

		tree := expr.NewTree(m.filterTokenPager)
		if err := m.parseNode(tree); err != nil {
			u.Errorf("could not parse: %v", err)
			return nil, err
		}
		fe.Expr = tree.Root
		if !m.fs.HasDateMath {
			m.fs.HasDateMath = expr.HasDateMath(fe.Expr)
		}
	default:
		return nil, fmt.Errorf("Expected clause but got %v", m.Cur())
	}
	return fe, nil
}
示例#2
0
func (m *filterQLParser) parseWhereExpr(req *FilterSelect) error {
	tree := expr.NewTree(m.filterTokenPager)
	if err := m.parseNode(tree); err != nil {
		u.Errorf("could not parse: %v", err)
		return err
	}

	fe := FilterExpr{Expr: tree.Root}
	filters := Filters{Op: lex.TokenAnd, Filters: []*FilterExpr{&fe}}
	req.Filter = &filters
	return nil
}