sl@0: # 2007 November 23
sl@0: #
sl@0: # The author disclaims copyright to this source code.  In place of
sl@0: # a legal notice, here is a blessing:
sl@0: #
sl@0: #    May you do good and not evil.
sl@0: #    May you find forgiveness for yourself and forgive others.
sl@0: #    May you share freely, never taking more than you give.
sl@0: #
sl@0: #***********************************************************************
sl@0: #
sl@0: # The tests in this file ensure that a temporary table is used
sl@0: # when required by an "INSERT INTO ... SELECT ..." statement.
sl@0: #
sl@0: # $Id: insert5.test,v 1.5 2008/08/04 03:51:24 danielk1977 Exp $
sl@0: 
sl@0: set testdir [file dirname $argv0]
sl@0: source $testdir/tester.tcl
sl@0: 
sl@0: ifcapable !subquery {
sl@0:   finish_test
sl@0:   return
sl@0: }
sl@0: 
sl@0: # Return true if the compilation of the sql passed as an argument 
sl@0: # includes the opcode OpenEphemeral. An "INSERT INTO ... SELECT"
sl@0: # statement includes such an opcode if a temp-table is used
sl@0: # to store intermediate results.
sl@0: # 
sl@0: proc uses_temp_table {sql} {
sl@0:   return [expr {[lsearch [execsql "EXPLAIN $sql"] OpenEphemeral]>=0}]
sl@0: }
sl@0: 
sl@0: # Construct the sample database.
sl@0: #
sl@0: do_test insert5-1.0 {
sl@0:   file delete -force test2.db test2.db-journal
sl@0:   execsql {
sl@0:     CREATE TABLE MAIN(Id INTEGER, Id1 INTEGER); 
sl@0:     CREATE TABLE B(Id INTEGER, Id1 INTEGER); 
sl@0:     CREATE VIEW v1 AS SELECT * FROM B;
sl@0:     CREATE VIEW v2 AS SELECT * FROM MAIN;
sl@0:     INSERT INTO MAIN(Id,Id1) VALUES(2,3); 
sl@0:     INSERT INTO B(Id,Id1) VALUES(2,3); 
sl@0:   }
sl@0: } {}
sl@0: 
sl@0: # Run the query.
sl@0: #
sl@0: ifcapable compound {
sl@0:   do_test insert5-1.1 {
sl@0:     execsql {
sl@0:       INSERT INTO B 
sl@0:         SELECT * FROM B UNION ALL 
sl@0:         SELECT * FROM MAIN WHERE exists (select * FROM B WHERE B.Id = MAIN.Id);
sl@0:       SELECT * FROM B;
sl@0:     }
sl@0:   } {2 3 2 3 2 3}
sl@0: } else {
sl@0:   do_test insert5-1.1 {
sl@0:     execsql {
sl@0:       INSERT INTO B SELECT * FROM B;
sl@0:       INSERT INTO B
sl@0:         SELECT * FROM MAIN WHERE exists (select * FROM B WHERE B.Id = MAIN.Id);
sl@0:       SELECT * FROM B;
sl@0:     }
sl@0:   } {2 3 2 3 2 3}
sl@0: }
sl@0: do_test insert5-2.1 {
sl@0:   uses_temp_table { INSERT INTO b SELECT * FROM main }
sl@0: } {0}
sl@0: do_test insert5-2.2 {
sl@0:   uses_temp_table { INSERT INTO b SELECT * FROM b }
sl@0: } {1}
sl@0: do_test insert5-2.3 {
sl@0:   uses_temp_table { INSERT INTO b SELECT (SELECT id FROM b), id1 FROM main }
sl@0: } {1}
sl@0: do_test insert5-2.4 {
sl@0:   uses_temp_table { INSERT INTO b SELECT id1, (SELECT id FROM b) FROM main }
sl@0: } {1}
sl@0: do_test insert5-2.5 {
sl@0:   uses_temp_table { 
sl@0:     INSERT INTO b 
sl@0:       SELECT * FROM main WHERE id = (SELECT id1 FROM b WHERE main.id = b.id) }
sl@0: } {1}
sl@0: do_test insert5-2.6 {
sl@0:   uses_temp_table { INSERT INTO b SELECT * FROM v1 }
sl@0: } {1}
sl@0: do_test insert5-2.7 {
sl@0:   uses_temp_table { INSERT INTO b SELECT * FROM v2 }
sl@0: } {0}
sl@0: do_test insert5-2.8 {
sl@0:   uses_temp_table { 
sl@0:     INSERT INTO b 
sl@0:     SELECT * FROM main WHERE id > 10 AND max(id1, (SELECT id FROM b)) > 10;
sl@0:   }
sl@0: } {1}
sl@0: 
sl@0: # UPDATE: Using a column from the outer query (main.id) in the GROUP BY
sl@0: # or ORDER BY of a sub-query is no longer supported.
sl@0: #
sl@0: # do_test insert5-2.9 {
sl@0: #   uses_temp_table { 
sl@0: #     INSERT INTO b 
sl@0: #     SELECT * FROM main 
sl@0: #     WHERE id > 10 AND (SELECT count(*) FROM v2 GROUP BY main.id)
sl@0: #   }
sl@0: # } {}
sl@0: do_test insert5-2.9 {
sl@0:   catchsql { 
sl@0:     INSERT INTO b 
sl@0:     SELECT * FROM main 
sl@0:     WHERE id > 10 AND (SELECT count(*) FROM v2 GROUP BY main.id)
sl@0:   }
sl@0: } {1 {no such column: main.id}}
sl@0: 
sl@0: finish_test