xref: /sqlite-3.40.0/test/insert5.test (revision 8a29dfde) 
1# 2007 November 23
2#
3# The author disclaims copyright to this source code.  In place of
4# a legal notice, here is a blessing:
5#
6#    May you do good and not evil.
7#    May you find forgiveness for yourself and forgive others.
8#    May you share freely, never taking more than you give.
9#
10#***********************************************************************
11#
12# The tests in this file ensure that a temporary table is used
13# when required by an "INSERT INTO ... SELECT ..." statement.
14#
15# $Id: insert5.test,v 1.4 2008/01/06 00:25:22 drh Exp $
16
17set testdir [file dirname $argv0]
18source $testdir/tester.tcl
19
20ifcapable !subquery {
21  finish_test
22  return
23}
24
25# Return true if the compilation of the sql passed as an argument
26# includes the opcode OpenEphemeral. An "INSERT INTO ... SELECT"
27# statement includes such an opcode if a temp-table is used
28# to store intermediate results.
29#
30proc uses_temp_table {sql} {
31  return [expr {[lsearch [execsql "EXPLAIN $sql"] OpenEphemeral]>=0}]
32}
33
34# Construct the sample database.
35#
36do_test insert5-1.0 {
37  file delete -force test2.db test2.db-journal
38  execsql {
39    CREATE TABLE MAIN(Id INTEGER, Id1 INTEGER);
40    CREATE TABLE B(Id INTEGER, Id1 INTEGER);
41    CREATE VIEW v1 AS SELECT * FROM B;
42    CREATE VIEW v2 AS SELECT * FROM MAIN;
43    INSERT INTO MAIN(Id,Id1) VALUES(2,3);
44    INSERT INTO B(Id,Id1) VALUES(2,3);
45  }
46} {}
47
48# Run the query.
49#
50do_test insert5-1.1 {
51  execsql {
52    INSERT INTO B
53      SELECT * FROM B UNION ALL
54      SELECT * FROM MAIN WHERE exists (select * FROM B WHERE B.Id = MAIN.Id);
55      SELECT * FROM B;
56  }
57} {2 3 2 3 2 3}
58do_test insert5-2.1 {
59  uses_temp_table { INSERT INTO b SELECT * FROM main }
60} {0}
61do_test insert5-2.2 {
62  uses_temp_table { INSERT INTO b SELECT * FROM b }
63} {1}
64do_test insert5-2.3 {
65  uses_temp_table { INSERT INTO b SELECT (SELECT id FROM b), id1 FROM main }
66} {1}
67do_test insert5-2.4 {
68  uses_temp_table { INSERT INTO b SELECT id1, (SELECT id FROM b) FROM main }
69} {1}
70do_test insert5-2.5 {
71  uses_temp_table {
72    INSERT INTO b
73      SELECT * FROM main WHERE id = (SELECT id1 FROM b WHERE main.id = b.id) }
74} {1}
75do_test insert5-2.6 {
76  uses_temp_table { INSERT INTO b SELECT * FROM v1 }
77} {1}
78do_test insert5-2.7 {
79  uses_temp_table { INSERT INTO b SELECT * FROM v2 }
80} {0}
81do_test insert5-2.8 {
82  uses_temp_table {
83    INSERT INTO b
84    SELECT * FROM main WHERE id > 10 AND max(id1, (SELECT id FROM b)) > 10;
85  }
86} {1}
87
88# UPDATE: Using a column from the outer query (main.id) in the GROUP BY
89# or ORDER BY of a sub-query is no longer supported.
90#
91# do_test insert5-2.9 {
92#   uses_temp_table {
93#     INSERT INTO b
94#     SELECT * FROM main
95#     WHERE id > 10 AND (SELECT count(*) FROM v2 GROUP BY main.id)
96#   }
97# } {}
98do_test insert5-2.9 {
99  catchsql {
100    INSERT INTO b
101    SELECT * FROM main
102    WHERE id > 10 AND (SELECT count(*) FROM v2 GROUP BY main.id)
103  }
104} {1 {no such column: main.id}}
105
106finish_test
107