fix regression bug introduced in fixing CTE bug previously

The bug was because the new with catch is too aggressive
and accidentally include other non-CTE with

Author: kafaichoi

lib/mix/tasks/sql.gen.parser.ex

@@ -156,7 +156,7 @@ defmodule Mix.Tasks.Sql.Gen.Parser do
     def insert_node({:with = tag, meta, []}, [{:ident, _, _} = l, {:parens, _, _} = r, {:as = t2, m2, a}], [], context, root) do
       {[], [], context, root ++ [{tag, meta, [{t2, m2, [[l, r] | a]}]}]}
     end
-    def insert_node({:with = tag, meta, []}, unit, acc, context, root) do
+    def insert_node({:with = tag, meta, []}, [{:ident, _, _}, {:as, _, _}] = unit, acc, context, root) do
       {[], [], context, root ++ [{tag, meta, unit ++ acc}]}
     end
     def insert_node({tag, meta, []}, unit, acc, context, root) when tag in ~w[by in references]a do

lib/parser.ex

@@ -126,7 +126,7 @@ defmodule SQL.Parser do
   def insert_node({:with = tag, meta, []}, [{:ident, _, _} = l, {:parens, _, _} = r, {:as = t2, m2, a}], [], context, root) do
     {[], [], context, root ++ [{tag, meta, [{t2, m2, [[l, r] | a]}]}]}
   end
-  def insert_node({:with = tag, meta, []}, unit, acc, context, root) do
+  def insert_node({:with = tag, meta, []}, [{:ident, _, _}, {:as, _, _}] = unit, acc, context, root) do
     {[], [], context, root ++ [{tag, meta, unit ++ acc}]}
   end
   def insert_node({tag, meta, []}, unit, acc, context, root) when tag in ~w[by in references]a do