diff --git a/expr/binary.go b/expr/binary.go
index ab832e8..2d3f87d 100644
--- a/expr/binary.go
+++ b/expr/binary.go
@@ -48,7 +48,7 @@ func (b *Binary) Walk(fn func(ident node.Node, values *Values, operator, parentO
 
 func (b *Binary) walk(fn func(ident node.Node, values *Values, operator, parentOperator string) error, operator string) error {
 	switch b.Op[0] {
-	case 'A', 'O':
+	case 'A', 'O', 'a', 'o':
 		if x, ok := b.X.(*Binary); ok {
 			if err := x.walk(fn, b.Op); err != nil {
 				return err
@@ -61,12 +61,24 @@ func (b *Binary) walk(fn func(ident node.Node, values *Values, operator, parentO
 		}
 		return nil
 	}
+
 	sel, values, err := b.Predicate()
 	if err != nil {
 		return err
 	}
-	return fn(sel, values, b.Op, operator)
+	err = fn(sel, values, b.Op, operator)
+	if err != nil {
+		return err
+	}
+	if binY, ok := b.Y.(*Binary); ok {
+		if nested, ok := binY.Y.(*Binary); ok {
+			if err = nested.walk(fn, b.Op); err != nil {
+				return err
+			}
+		}
 
+	}
+	return nil
 }
 
 // Predicate binary predicate or nil
diff --git a/query_test.go b/query_test.go
index 86aa707..fb56d2e 100644
--- a/query_test.go
+++ b/query_test.go
@@ -5,11 +5,28 @@ import (
 	"fmt"
 	"github.com/stretchr/testify/assert"
 	"github.com/viant/parsly"
+	"github.com/viant/sqlparser/expr"
+	"github.com/viant/sqlparser/node"
 	"github.com/viant/sqlparser/query"
 	"strings"
 	"testing"
 )
 
+func TestBinaryWalk(t *testing.T) {
+	query, _ := ParseQuery("SELECT * FROM t WHERE a = 1 AND b = 2 AND c IN(1,2)")
+	binary, ok := query.Qualify.X.(*expr.Binary)
+	if !assert.True(t, ok) {
+		return
+	}
+	var actualColumns = make([]string, 0)
+	binary.Walk(func(ident node.Node, values *expr.Values, operator, parentOperator string) error {
+		actualColumns = append(actualColumns, Stringify(ident))
+		return nil
+	})
+	assert.EqualValues(t, []string{"a", "b", "c"}, actualColumns)
+
+}
+
 func TestParseSelect(t *testing.T) {
 
 	{
@@ -313,6 +330,12 @@ func TestParseSelect(t *testing.T) {
 				SQL:         `SELECT               ID,NAME  FROM AAA               ORDER BY 2 DESC, 1 ASC`,
 				expect:      `SELECT ID, NAME FROM AAA ORDER BY 2 DESC, 1 ASC`,
 			},
+
+			{
+				description: "",
+				SQL:         `SELECT col1, col2 FROM table1/tt t JOIN xx/e v ON v.ID=t.ID`,
+				expect:      `SELECT col1, col2 FROM table1/tt t JOIN xx/e v ON v.ID = t.ID`,
+			},
 		}
 
 		for _, testCase := range testCases {