# 2007 November 23

 #

 # The author disclaims copyright to this source code.  In place of

 # a legal notice, here is a blessing:

 #

 #    May you do good and not evil.

 #    May you find forgiveness for yourself and forgive others.

 #    May you share freely, never taking more than you give.

 #

 #***********************************************************************

 #

 # The tests in this file ensure that a temporary table is used

 # when required by an "INSERT INTO ... SELECT ..." statement.

 #

 # $Id: insert5.test,v 1.5 2008/08/04 03:51:24 danielk1977 Exp $

 set testdir [file dirname $argv0]

 source $testdir/tester.tcl

 ifcapable !subquery {

   finish_test

   return

 }

 # Return true if the compilation of the sql passed as an argument 

 # includes the opcode OpenEphemeral. An "INSERT INTO ... SELECT"

 # statement includes such an opcode if a temp-table is used

 # to store intermediate results.

 # 

 proc uses_temp_table {sql} {

   return [expr {[lsearch [execsql "EXPLAIN $sql"] OpenEphemeral]>=0}]

 }

 # Construct the sample database.

 #

 do_test insert5-1.0 {

   file delete -force test2.db test2.db-journal

   execsql {

     CREATE TABLE MAIN(Id INTEGER, Id1 INTEGER); 

     CREATE TABLE B(Id INTEGER, Id1 INTEGER); 

     CREATE VIEW v1 AS SELECT * FROM B;

     CREATE VIEW v2 AS SELECT * FROM MAIN;

     INSERT INTO MAIN(Id,Id1) VALUES(2,3); 

     INSERT INTO B(Id,Id1) VALUES(2,3); 

   }

 } {}

 # Run the query.

 #

 ifcapable compound {

   do_test insert5-1.1 {

     execsql {

       INSERT INTO B 

         SELECT * FROM B UNION ALL 

         SELECT * FROM MAIN WHERE exists (select * FROM B WHERE B.Id = MAIN.Id);

       SELECT * FROM B;

     }

   } {2 3 2 3 2 3}

 } else {

   do_test insert5-1.1 {

     execsql {

       INSERT INTO B SELECT * FROM B;

       INSERT INTO B

         SELECT * FROM MAIN WHERE exists (select * FROM B WHERE B.Id = MAIN.Id);

       SELECT * FROM B;

     }

   } {2 3 2 3 2 3}

 }

 do_test insert5-2.1 {

   uses_temp_table { INSERT INTO b SELECT * FROM main }

 } {0}

 do_test insert5-2.2 {

   uses_temp_table { INSERT INTO b SELECT * FROM b }

 } {1}

 do_test insert5-2.3 {

   uses_temp_table { INSERT INTO b SELECT (SELECT id FROM b), id1 FROM main }

 } {1}

 do_test insert5-2.4 {

   uses_temp_table { INSERT INTO b SELECT id1, (SELECT id FROM b) FROM main }

 } {1}

 do_test insert5-2.5 {

   uses_temp_table { 

     INSERT INTO b 

       SELECT * FROM main WHERE id = (SELECT id1 FROM b WHERE main.id = b.id) }

 } {1}

 do_test insert5-2.6 {

   uses_temp_table { INSERT INTO b SELECT * FROM v1 }

 } {1}

 do_test insert5-2.7 {

   uses_temp_table { INSERT INTO b SELECT * FROM v2 }

 } {0}

 do_test insert5-2.8 {

   uses_temp_table { 

     INSERT INTO b 

     SELECT * FROM main WHERE id > 10 AND max(id1, (SELECT id FROM b)) > 10;

   }

 } {1}

 # UPDATE: Using a column from the outer query (main.id) in the GROUP BY

 # or ORDER BY of a sub-query is no longer supported.

 #

 # do_test insert5-2.9 {

 #   uses_temp_table { 

 #     INSERT INTO b 

 #     SELECT * FROM main 

 #     WHERE id > 10 AND (SELECT count(*) FROM v2 GROUP BY main.id)

 #   }

 # } {}

 do_test insert5-2.9 {

   catchsql { 

     INSERT INTO b 

     SELECT * FROM main 

     WHERE id > 10 AND (SELECT count(*) FROM v2 GROUP BY main.id)

   }

 } {1 {no such column: main.id}}

 finish_test