extended sql parser

Author: adranwit

query_test.go

@@ -274,6 +274,21 @@ func TestParseSelect(t *testing.T) {
 				SQL:         "SELECT t.* FROM x t WHERE 1=1 AND (x=2)",
 				expect:      "SELECT t.* FROM x t WHERE 1 = 1 AND (x=2)",
 			},
+			{
+				description: "where not equal with order by",
+				SQL:         "SELECT t.* FROM x t WHERE a <> b ORDER BY c",
+				expect:      "SELECT t.* FROM x t WHERE a <> b ORDER BY c",
+			},
+			{
+				description: "where not equal without spaces with order by",
+				SQL:         "SELECT t.* FROM x t WHERE a<>b ORDER BY c",
+				expect:      "SELECT t.* FROM x t WHERE a <> b ORDER BY c",
+			},
+			{
+				description: "where not equal placeholder with order by",
+				SQL:         "SELECT t.* FROM x t WHERE a <> $b ORDER BY c",
+				expect:      "SELECT t.* FROM x t WHERE a <> $b ORDER BY c",
+			},
 
 			{
 				description: "func call select",

traverse.go

@@ -12,7 +12,7 @@ import (
 	"github.com/viant/sqlparser/update"
 )
 
-//Traverse traverse node
+// Traverse traverse node
 func Traverse(n node.Node, visitor func(n node.Node) bool) {
 	traverse(n, visitor)
 }
@@ -105,6 +105,11 @@ func traverse(n node.Node, visitor func(n node.Node) bool) bool {
 	case *expr.Ident:
 	case *expr.Call:
 		traverse(actual.X, visitor)
+		for _, arg := range actual.Args {
+			traverse(arg, visitor)
+		}
+	case *expr.Collate:
+		traverse(actual.X, visitor)
 	case *expr.Range:
 		traverse(actual.Min, visitor)
 		traverse(actual.Max, visitor)