2026-03-12 20:23:15

tpt/ast/02_qt_troubleshooting.sql

@@ -0,0 +1,23 @@
+-- Copyright 2018 Tanel Poder. All rights reserved. More info at http://tanelpoder.com
+-- Licensed under the Apache License, Version 2.0. See LICENSE.txt for terms & conditions.
+
+drop table qt_test;
+
+create table qt_test (
+    id      number        primary key
+  , name    varchar2(100)
+)
+/
+
+insert into qt_test select rownum, lpad('x',100,'x') from dual connect by level <=10000;
+
+exec dbms_stats.gather_table_stats(user,'QT_TEST');
+
+select count(name) from qt_test;
+@x
+
+alter table qt_test modify name not null;
+
+select count(name) from qt_test;
+@x
+