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Overview
Comment: | Add the analyze8.test test module for sqlite_stat3. |
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Downloads: | Tarball | ZIP archive |
Timelines: | family | ancestors | descendants | both | stat3-enhancement |
Files: | files | file ages | folders |
SHA1: |
2c83ac89dc5a6017587defb541c9f373 |
User & Date: | drh 2011-08-16 01:15:12.193 |
Context
2011-08-16
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02:07 | Allow the sqlite3VdbeJumpHere() routine to accept a negative or zero address if a prior memory allocation error has occurred. The new sqlite_stat3 logic needs this. (check-in: 9650d79628 user: drh tags: stat3-enhancement) | |
01:15 | Add the analyze8.test test module for sqlite_stat3. (check-in: 2c83ac89dc user: drh tags: stat3-enhancement) | |
2011-08-15
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12:58 | Update some test cases to work with sqlite_stat3 instead of sqlite_stat2. (check-in: 2504bcfb0c user: drh tags: stat3-enhancement) | |
Changes
Added test/analyze8.test.
> > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 | # 2011 August 13 # # 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. # #*********************************************************************** # # This file implements tests for SQLite library. The focus of the tests # in this file is testing the capabilities of sqlite_stat3. # set testdir [file dirname $argv0] source $testdir/tester.tcl ifcapable !stat3 { finish_test return } set testprefix analyze8 proc eqp {sql {db db}} { uplevel execsql [list "EXPLAIN QUERY PLAN $sql"] $db } # Scenario: # # Two indices. One has mostly singleton entries, but for a few # values there are hundreds of entries. The other has 10-20 # entries per value. # # Verify that the query planner chooses the first index for the singleton # entries and the second index for the others. # do_test 1.0 { db eval { CREATE TABLE t1(a,b,c,d); CREATE INDEX t1a ON t1(a); CREATE INDEX t1b ON t1(b); CREATE INDEX t1c ON t1(c); } for {set i 0} {$i<1000} {incr i} { if {$i%2==0} {set a $i} {set a [expr {($i%8)*100}]} set b [expr {$i/10}] set c [expr {$i/8}] set c [expr {$c*$c*$c}] db eval {INSERT INTO t1 VALUES($a,$b,$c,$i)} } db eval {ANALYZE} } {} # The a==100 comparison is expensive because there are many rows # with a==100. And so for those cases, choose the t1b index. # # Buf ro a==99 and a==101, there are far fewer rows so choose # the t1a index. # do_test 1.1 { eqp {SELECT * FROM t1 WHERE a=100 AND b=55} } {0 0 0 {SEARCH TABLE t1 USING INDEX t1b (b=?) (~2 rows)}} do_test 1.2 { eqp {SELECT * FROM t1 WHERE a=99 AND b=55} } {0 0 0 {SEARCH TABLE t1 USING INDEX t1a (a=?) (~1 rows)}} do_test 1.3 { eqp {SELECT * FROM t1 WHERE a=101 AND b=55} } {0 0 0 {SEARCH TABLE t1 USING INDEX t1a (a=?) (~1 rows)}} do_test 1.4 { eqp {SELECT * FROM t1 WHERE a=100 AND b=56} } {0 0 0 {SEARCH TABLE t1 USING INDEX t1b (b=?) (~2 rows)}} do_test 1.5 { eqp {SELECT * FROM t1 WHERE a=99 AND b=56} } {0 0 0 {SEARCH TABLE t1 USING INDEX t1a (a=?) (~1 rows)}} do_test 1.6 { eqp {SELECT * FROM t1 WHERE a=101 AND b=56} } {0 0 0 {SEARCH TABLE t1 USING INDEX t1a (a=?) (~1 rows)}} do_test 2.1 { eqp {SELECT * FROM t1 WHERE a=100 AND b BETWEEN 50 AND 54} } {0 0 0 {SEARCH TABLE t1 USING INDEX t1b (b>? AND b<?) (~2 rows)}} # There are many more values of c between 0 and 100000 than there are # between 800000 and 900000. So t1c is more selective for the latter # range. # do_test 3.1 { eqp {SELECT * FROM t1 WHERE b BETWEEN 50 AND 54 AND c BETWEEN 0 AND 100000} } {0 0 0 {SEARCH TABLE t1 USING INDEX t1b (b>? AND b<?) (~6 rows)}} do_test 3.2 { eqp {SELECT * FROM t1 WHERE b BETWEEN 50 AND 54 AND c BETWEEN 800000 AND 900000} } {0 0 0 {SEARCH TABLE t1 USING INDEX t1c (c>? AND c<?) (~4 rows)}} do_test 3.3 { eqp {SELECT * FROM t1 WHERE a=100 AND c BETWEEN 0 AND 100000} } {0 0 0 {SEARCH TABLE t1 USING INDEX t1a (a=?) (~63 rows)}} do_test 3.4 { eqp {SELECT * FROM t1 WHERE a=100 AND c BETWEEN 800000 AND 900000} } {0 0 0 {SEARCH TABLE t1 USING INDEX t1c (c>? AND c<?) (~2 rows)}} finish_test |