AryaWu/sqlite

1# 2017-02-172#3# The author disclaims copyright to this source code.  In place of4# 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# This file implements tests for the logic used to estimate when13# running ANALYZE would be beneficial.14#15# Note that this test uses some hard-coded bitmask values from sqliteInt.h.16# If any of the following constants changes:17#18#    define TF_HasStat1   0x001019#    define TF_StatsUsed  0x010020#21# then some of the magic numbers in test results below might need to be22# adjusted.23#24 25set testdir [file dirname $argv0]26source $testdir/tester.tcl27 28# There is nothing to test if ANALYZE is disable for this build.29# These tests also use "PRAGMA stats" which are only enabled for30# debugging builds.31#32ifcapable {!debug || !analyze || !vtab} {33  finish_test34  return35}36 37do_execsql_test autoanalyze1-100 {38  -- Build up a test table with some indexes39  CREATE TABLE t1(a INTEGER PRIMARY KEY, b, c, d);40  CREATE UNIQUE INDEX t1bc ON t1(b,c);41  CREATE INDEX t1d ON t1(d);42  WITH RECURSIVE c(x) AS (VALUES(1) UNION ALL SELECT x+1 FROM c WHERE x<100)43    INSERT INTO t1(a,b,c,d) SELECT x, x, x, x FROM c;44  -- Verify that the hasStat1 flag is clear on on indexes45  SELECT idx, flgs FROM pragma_stats46   WHERE idx IS NOT NULL47   ORDER BY idx;48  -- Verify that the TF_HasStat1 flag is clear on the table49  SELECT tbl, (flgs & 0x10)!=0 FROM pragma_stats WHERE tbl='t1' AND idx IS NULL;50} {t1bc 0 t1d 0 t1 0}51 52# No use of stat1 recorded so far53do_execsql_test autoanalyze1-110 {54  SELECT (flgs & 0x0100)!=0 FROM pragma_stats WHERE tbl='t1' AND idx IS NULL;55} {0}56 57# Access using a unique index does not set the TF_StatsUsed flag.58#59do_execsql_test autoanalyze1-200 {60  SELECT * FROM t1 WHERE a=55;61} {55 55 55 55}62do_execsql_test autoanalyze1-201 {63  SELECT (flgs & 0x0100)!=0 FROM pragma_stats WHERE tbl='t1' AND idx IS NULL;64} {0}65 66do_execsql_test autoanalyze1-210 {67  SELECT * FROM t1 WHERE a IN (55,199,299);68} {55 55 55 55}69do_execsql_test autoanalyze1-211 {70  SELECT (flgs & 0x0100)!=0 FROM pragma_stats WHERE tbl='t1' AND idx IS NULL;71} {0}72 73do_execsql_test autoanalyze1-220 {74  SELECT * FROM t1 WHERE (b,c)=(45,45);75} {45 45 45 45}76do_execsql_test autoanalyze1-221 {77  SELECT (flgs & 0x0100)!=0 FROM pragma_stats WHERE tbl='t1' AND idx IS NULL;78} {0}79 80# Any use of the non-unique t1d index triggers the use of stats.81#82sqlite3 db test.db83do_execsql_test autoanalyze1-300 {84  SELECT * FROM t1 WHERE d=45;85} {45 45 45 45}86do_execsql_test autoanalyze1-301 {87  SELECT (flgs & 0x0100)!=0 FROM pragma_stats WHERE tbl='t1' AND idx IS NULL;88} {1}89 90sqlite3 db test.db91do_execsql_test autoanalyze1-310 {92  SELECT * FROM t1 WHERE d=45 AND a=45;93} {45 45 45 45}94do_execsql_test autoanalyze1-311 {95  SELECT (flgs & 0x0100)!=0 FROM pragma_stats WHERE tbl='t1' AND idx IS NULL;96} {0}  ;# The ROWID lookup short-circuits the d=45 constraint97 98sqlite3 db test.db99do_execsql_test autoanalyze1-320 {100  SELECT * FROM t1 WHERE d=45 AND a IN (45,46);101} {45 45 45 45}102do_execsql_test autoanalyze1-321 {103  SELECT (flgs & 0x0100)!=0 FROM pragma_stats WHERE tbl='t1' AND idx IS NULL;104} {1}105 106# Any use of prefix of a unique index triggers the use of stats107#108sqlite3 db test.db109do_execsql_test autoanalyze1-400 {110  SELECT * FROM t1 WHERE b=45;111} {45 45 45 45}112do_execsql_test autoanalyze1-401 {113  SELECT (flgs & 0x0100)!=0 FROM pragma_stats WHERE tbl='t1' AND idx IS NULL;114} {1}115 116# The TF_StatsUsed flag is reset when the database is reopened117#118sqlite3 db test.db119do_execsql_test autoanalyze1-500 {120  SELECT (flgs & 0x0100)!=0 FROM pragma_stats WHERE tbl='t1' AND idx IS NULL;121} {0}122 123finish_test124