MDEV-15571 Wrong results with big_tables=1 and CTE

The cause of this bug was the same as for the bug mdev-15575.
Fixed by the patch for the latter.

mysql-test/r/cte_recursive.result

@@ -3080,3 +3080,16 @@ a
 129
 130
 set big_tables=default;
+#
+# MDEV-1571: Setting user variable in recursive CTE
+#
+set big_tables=1;
+with recursive qn as
+(
+select 1 as a from dual
+union all
+select a*2000 from qn where a<10000000000000000000
+)
+select * from qn;
+ERROR 22003: BIGINT value is out of range in '`qn`.`a` * 2000'
+set big_tables=default;

mysql-test/t/cte_recursive.test

@@ -2109,3 +2109,20 @@ with recursive qn as
 select * from qn;
 
 set big_tables=default;
+
+--echo #
+--echo # MDEV-1571: Setting user variable in recursive CTE
+--echo #
+
+set big_tables=1;
+
+--error ER_DATA_OUT_OF_RANGE
+with recursive qn as
+(
+  select 1 as a from dual
+  union all
+  select a*2000 from qn where a<10000000000000000000
+)
+select * from qn;
+
+set big_tables=default;