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 1.5 2008/08/04 03:51:24 danielk1977 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#
50ifcapable compound {
51  do_test insert5-1.1 {
52    execsql {
53      INSERT INTO B 
54        SELECT * FROM B UNION ALL 
55        SELECT * FROM MAIN WHERE exists (select * FROM B WHERE B.Id = MAIN.Id);
56      SELECT * FROM B;
57    }
58  } {2 3 2 3 2 3}
59} else {
60  do_test insert5-1.1 {
61    execsql {
62      INSERT INTO B SELECT * FROM B;
63      INSERT INTO B
64        SELECT * FROM MAIN WHERE exists (select * FROM B WHERE B.Id = MAIN.Id);
65      SELECT * FROM B;
66    }
67  } {2 3 2 3 2 3}
68}
69do_test insert5-2.1 {
70  uses_temp_table { INSERT INTO b SELECT * FROM main }
71} {0}
72do_test insert5-2.2 {
73  uses_temp_table { INSERT INTO b SELECT * FROM b }
74} {1}
75do_test insert5-2.3 {
76  uses_temp_table { INSERT INTO b SELECT (SELECT id FROM b), id1 FROM main }
77} {1}
78do_test insert5-2.4 {
79  uses_temp_table { INSERT INTO b SELECT id1, (SELECT id FROM b) FROM main }
80} {1}
81do_test insert5-2.5 {
82  uses_temp_table { 
83    INSERT INTO b 
84      SELECT * FROM main WHERE id = (SELECT id1 FROM b WHERE main.id = b.id) }
85} {1}
86do_test insert5-2.6 {
87  uses_temp_table { INSERT INTO b SELECT * FROM v1 }
88} {1}
89do_test insert5-2.7 {
90  uses_temp_table { INSERT INTO b SELECT * FROM v2 }
91} {0}
92do_test insert5-2.8 {
93  uses_temp_table { 
94    INSERT INTO b 
95    SELECT * FROM main WHERE id > 10 AND max(id1, (SELECT id FROM b)) > 10;
96  }
97} {1}
98
99# UPDATE: Using a column from the outer query (main.id) in the GROUP BY
100# or ORDER BY of a sub-query is no longer supported.
101#
102# do_test insert5-2.9 {
103#   uses_temp_table { 
104#     INSERT INTO b 
105#     SELECT * FROM main 
106#     WHERE id > 10 AND (SELECT count(*) FROM v2 GROUP BY main.id)
107#   }
108# } {}
109do_test insert5-2.9 {
110  catchsql { 
111    INSERT INTO b 
112    SELECT * FROM main 
113    WHERE id > 10 AND (SELECT count(*) FROM v2 GROUP BY main.id)
114  }
115} {1 {no such column: main.id}}
116
117finish_test
118