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# 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 {
forcedelete 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
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