wasCSharpSQLite – Blame information for rev 4

Subversion Repositories:
Rev:
Rev Author Line No. Line
1 office 1 # 2011 April 1
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 # This file implements regression tests for SQLite library.
12 # This file implements tests for the ANALYZE command when an idnex
13 # name is given as the argument.
14 #
15  
16 set testdir [file dirname $argv0]
17 source $testdir/tester.tcl
18  
19 # There is nothing to test if ANALYZE is disable for this build.
20 #
21 ifcapable {!analyze||!vtab} {
22 finish_test
23 return
24 }
25  
26 # Generate some test data
27 #
28 do_test analyze7-1.0 {
29 register_wholenumber_module db
30 execsql {
31 CREATE TABLE t1(a,b,c,d);
32 CREATE INDEX t1a ON t1(a);
33 CREATE INDEX t1b ON t1(b);
34 CREATE INDEX t1cd ON t1(c,d);
35 CREATE VIRTUAL TABLE nums USING wholenumber;
36 INSERT INTO t1 SELECT value, value, value/100, value FROM nums
37 WHERE value BETWEEN 1 AND 256;
38 EXPLAIN QUERY PLAN SELECT * FROM t1 WHERE a=123;
39 }
40 } {0 0 0 {SEARCH TABLE t1 USING INDEX t1a (a=?) (~10 rows)}}
41 do_test analyze7-1.1 {
42 execsql {EXPLAIN QUERY PLAN SELECT * FROM t1 WHERE b=123;}
43 } {0 0 0 {SEARCH TABLE t1 USING INDEX t1b (b=?) (~10 rows)}}
44 do_test analyze7-1.2 {
45 execsql {EXPLAIN QUERY PLAN SELECT * FROM t1 WHERE c=2;}
46 } {0 0 0 {SEARCH TABLE t1 USING INDEX t1cd (c=?) (~10 rows)}}
47  
48 # Run an analyze on one of the three indices. Verify that this
49 # effects the row-count estimate on the one query that uses that
50 # one index.
51 #
52 do_test analyze7-2.0 {
53 execsql {ANALYZE t1a;}
54 db cache flush
55 execsql {EXPLAIN QUERY PLAN SELECT * FROM t1 WHERE a=123;}
56 } {0 0 0 {SEARCH TABLE t1 USING INDEX t1a (a=?) (~1 rows)}}
57 do_test analyze7-2.1 {
58 execsql {EXPLAIN QUERY PLAN SELECT * FROM t1 WHERE b=123;}
59 } {0 0 0 {SEARCH TABLE t1 USING INDEX t1b (b=?) (~10 rows)}}
60 do_test analyze7-2.2 {
61 execsql {EXPLAIN QUERY PLAN SELECT * FROM t1 WHERE c=2;}
62 } {0 0 0 {SEARCH TABLE t1 USING INDEX t1cd (c=?) (~10 rows)}}
63  
64 # Verify that since the query planner now things that t1a is more
65 # selective than t1b, it prefers to use t1a.
66 #
67 do_test analyze7-2.3 {
68 execsql {EXPLAIN QUERY PLAN SELECT * FROM t1 WHERE a=123 AND b=123}
69 } {0 0 0 {SEARCH TABLE t1 USING INDEX t1a (a=?) (~1 rows)}}
70  
71 # Run an analysis on another of the three indices. Verify that this
72 # new analysis works and does not disrupt the previous analysis.
73 #
74 do_test analyze7-3.0 {
75 execsql {ANALYZE t1cd;}
76 db cache flush;
77 execsql {EXPLAIN QUERY PLAN SELECT * FROM t1 WHERE a=123;}
78 } {0 0 0 {SEARCH TABLE t1 USING INDEX t1a (a=?) (~1 rows)}}
79 do_test analyze7-3.1 {
80 execsql {EXPLAIN QUERY PLAN SELECT * FROM t1 WHERE b=123;}
81 } {0 0 0 {SEARCH TABLE t1 USING INDEX t1b (b=?) (~10 rows)}}
82 do_test analyze7-3.2.1 {
83 execsql {EXPLAIN QUERY PLAN SELECT * FROM t1 WHERE c=?;}
84 } {0 0 0 {SEARCH TABLE t1 USING INDEX t1cd (c=?) (~86 rows)}}
85 ifcapable stat2 {
86 # If ENABLE_STAT2 is defined, SQLite comes up with a different estimated
87 # row count for (c=2) than it does for (c=?).
88 do_test analyze7-3.2.2 {
89 execsql {EXPLAIN QUERY PLAN SELECT * FROM t1 WHERE c=2;}
90 } {0 0 0 {SEARCH TABLE t1 USING INDEX t1cd (c=?) (~51 rows)}}
91 } else {
92 # If ENABLE_STAT2 is not defined, the expected row count for (c=2) is the
93 # same as that for (c=?).
94 do_test analyze7-3.2.3 {
95 execsql {EXPLAIN QUERY PLAN SELECT * FROM t1 WHERE c=2;}
96 } {0 0 0 {SEARCH TABLE t1 USING INDEX t1cd (c=?) (~86 rows)}}
97 }
98 do_test analyze7-3.3 {
99 execsql {EXPLAIN QUERY PLAN SELECT * FROM t1 WHERE a=123 AND b=123}
100 } {0 0 0 {SEARCH TABLE t1 USING INDEX t1a (a=?) (~1 rows)}}
101 do_test analyze7-3.4 {
102 execsql {EXPLAIN QUERY PLAN SELECT * FROM t1 WHERE c=123 AND b=123}
103 } {0 0 0 {SEARCH TABLE t1 USING INDEX t1b (b=?) (~2 rows)}}
104 do_test analyze7-3.5 {
105 execsql {EXPLAIN QUERY PLAN SELECT * FROM t1 WHERE a=123 AND c=123}
106 } {0 0 0 {SEARCH TABLE t1 USING INDEX t1a (a=?) (~1 rows)}}
107 do_test analyze7-3.6 {
108 execsql {EXPLAIN QUERY PLAN SELECT * FROM t1 WHERE c=123 AND d=123 AND b=123}
109 } {0 0 0 {SEARCH TABLE t1 USING INDEX t1cd (c=? AND d=?) (~1 rows)}}
110  
111 finish_test