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|    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  |  | 
|   17 set testdir [file dirname $argv0] |  | 
|   18 source $testdir/tester.tcl |  | 
|   19  |  | 
|   20 ifcapable !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 #  |  | 
|   30 proc uses_temp_table {sql} { |  | 
|   31   return [expr {[lsearch [execsql "EXPLAIN $sql"] OpenEphemeral]>=0}] |  | 
|   32 } |  | 
|   33  |  | 
|   34 # Construct the sample database. |  | 
|   35 # |  | 
|   36 do_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 # |  | 
|   50 ifcapable 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 } |  | 
|   69 do_test insert5-2.1 { |  | 
|   70   uses_temp_table { INSERT INTO b SELECT * FROM main } |  | 
|   71 } {0} |  | 
|   72 do_test insert5-2.2 { |  | 
|   73   uses_temp_table { INSERT INTO b SELECT * FROM b } |  | 
|   74 } {1} |  | 
|   75 do_test insert5-2.3 { |  | 
|   76   uses_temp_table { INSERT INTO b SELECT (SELECT id FROM b), id1 FROM main } |  | 
|   77 } {1} |  | 
|   78 do_test insert5-2.4 { |  | 
|   79   uses_temp_table { INSERT INTO b SELECT id1, (SELECT id FROM b) FROM main } |  | 
|   80 } {1} |  | 
|   81 do_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} |  | 
|   86 do_test insert5-2.6 { |  | 
|   87   uses_temp_table { INSERT INTO b SELECT * FROM v1 } |  | 
|   88 } {1} |  | 
|   89 do_test insert5-2.7 { |  | 
|   90   uses_temp_table { INSERT INTO b SELECT * FROM v2 } |  | 
|   91 } {0} |  | 
|   92 do_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 # } {} |  | 
|  109 do_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  |  | 
|  117 finish_test |  | 
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