# 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