gitlab.com/CoiaPrant/sqlite3@v1.19.1/testdata/tcl/autoanalyze1.test (about) 1 # 2017-02-17 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 # This file implements tests for the logic used to estimate when 13 # 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 0x0010 19 # define TF_StatsUsed 0x0100 20 # 21 # then some of the magic numbers in test results below might need to be 22 # adjusted. 23 # 24 25 set testdir [file dirname $argv0] 26 source $testdir/tester.tcl 27 28 # There is nothing to test if ANALYZE is disable for this build. 29 # These tests also use "PRAGMA stats" which are only enabled for 30 # debugging builds. 31 # 32 ifcapable {!debug || !analyze || !vtab} { 33 finish_test 34 return 35 } 36 37 do_execsql_test autoanalyze1-100 { 38 -- Build up a test table with some indexes 39 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 indexes 45 SELECT idx, flgs FROM pragma_stats 46 WHERE idx IS NOT NULL 47 ORDER BY idx; 48 -- Verify that the TF_HasStat1 flag is clear on the table 49 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 far 53 do_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 # 59 do_execsql_test autoanalyze1-200 { 60 SELECT * FROM t1 WHERE a=55; 61 } {55 55 55 55} 62 do_execsql_test autoanalyze1-201 { 63 SELECT (flgs & 0x0100)!=0 FROM pragma_stats WHERE tbl='t1' AND idx IS NULL; 64 } {0} 65 66 do_execsql_test autoanalyze1-210 { 67 SELECT * FROM t1 WHERE a IN (55,199,299); 68 } {55 55 55 55} 69 do_execsql_test autoanalyze1-211 { 70 SELECT (flgs & 0x0100)!=0 FROM pragma_stats WHERE tbl='t1' AND idx IS NULL; 71 } {0} 72 73 do_execsql_test autoanalyze1-220 { 74 SELECT * FROM t1 WHERE (b,c)=(45,45); 75 } {45 45 45 45} 76 do_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 # 82 sqlite3 db test.db 83 do_execsql_test autoanalyze1-300 { 84 SELECT * FROM t1 WHERE d=45; 85 } {45 45 45 45} 86 do_execsql_test autoanalyze1-301 { 87 SELECT (flgs & 0x0100)!=0 FROM pragma_stats WHERE tbl='t1' AND idx IS NULL; 88 } {1} 89 90 sqlite3 db test.db 91 do_execsql_test autoanalyze1-310 { 92 SELECT * FROM t1 WHERE d=45 AND a=45; 93 } {45 45 45 45} 94 do_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 constraint 97 98 sqlite3 db test.db 99 do_execsql_test autoanalyze1-320 { 100 SELECT * FROM t1 WHERE d=45 AND a IN (45,46); 101 } {45 45 45 45} 102 do_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 stats 107 # 108 sqlite3 db test.db 109 do_execsql_test autoanalyze1-400 { 110 SELECT * FROM t1 WHERE b=45; 111 } {45 45 45 45} 112 do_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 reopened 117 # 118 sqlite3 db test.db 119 do_execsql_test autoanalyze1-500 { 120 SELECT (flgs & 0x0100)!=0 FROM pragma_stats WHERE tbl='t1' AND idx IS NULL; 121 } {0} 122 123 finish_test