# 2017-02-17 # # 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 the logic used to estimate when # running ANALYZE would be beneficial. # # Note that this test uses some hard-coded bitmask values from sqliteInt.h. # If any of the following constants changes: # # define TF_HasStat1 0x0010 # define TF_StatsUsed 0x0100 # # then some of the magic numbers in test results below might need to be # adjusted. # set testdir [file dirname $argv0] source $testdir/tester.tcl # There is nothing to test if ANALYZE is disable for this build. # These tests also use "PRAGMA stats" which are only enabled for # debugging builds. # ifcapable {!debug || !analyze || !vtab} { finish_test return } do_execsql_test autoanalyze1-100 { -- Build up a test table with some indexes CREATE TABLE t1(a INTEGER PRIMARY KEY, b, c, d); CREATE UNIQUE INDEX t1bc ON t1(b,c); CREATE INDEX t1d ON t1(d); WITH RECURSIVE c(x) AS (VALUES(1) UNION ALL SELECT x+1 FROM c WHERE x<100) INSERT INTO t1(a,b,c,d) SELECT x, x, x, x FROM c; -- Verify that the hasStat1 flag is clear on on indexes SELECT idx, flgs FROM pragma_stats WHERE idx IS NOT NULL ORDER BY idx; -- Verify that the TF_HasStat1 flag is clear on the table SELECT tbl, (flgs & 0x10)!=0 FROM pragma_stats WHERE tbl='t1' AND idx IS NULL; } {t1bc 0 t1d 0 t1 0} # No use of stat1 recorded so far do_execsql_test autoanalyze1-110 { SELECT (flgs & 0x0100)!=0 FROM pragma_stats WHERE tbl='t1' AND idx IS NULL; } {0} # Access using a unique index does not set the TF_StatsUsed flag. # do_execsql_test autoanalyze1-200 { SELECT * FROM t1 WHERE a=55; } {55 55 55 55} do_execsql_test autoanalyze1-201 { SELECT (flgs & 0x0100)!=0 FROM pragma_stats WHERE tbl='t1' AND idx IS NULL; } {0} do_execsql_test autoanalyze1-210 { SELECT * FROM t1 WHERE a IN (55,199,299); } {55 55 55 55} do_execsql_test autoanalyze1-211 { SELECT (flgs & 0x0100)!=0 FROM pragma_stats WHERE tbl='t1' AND idx IS NULL; } {0} do_execsql_test autoanalyze1-220 { SELECT * FROM t1 WHERE (b,c)=(45,45); } {45 45 45 45} do_execsql_test autoanalyze1-221 { SELECT (flgs & 0x0100)!=0 FROM pragma_stats WHERE tbl='t1' AND idx IS NULL; } {0} # Any use of the non-unique t1d index triggers the use of stats. # sqlite3 db test.db do_execsql_test autoanalyze1-300 { SELECT * FROM t1 WHERE d=45; } {45 45 45 45} do_execsql_test autoanalyze1-301 { SELECT (flgs & 0x0100)!=0 FROM pragma_stats WHERE tbl='t1' AND idx IS NULL; } {1} sqlite3 db test.db do_execsql_test autoanalyze1-310 { SELECT * FROM t1 WHERE d=45 AND a=45; } {45 45 45 45} do_execsql_test autoanalyze1-311 { SELECT (flgs & 0x0100)!=0 FROM pragma_stats WHERE tbl='t1' AND idx IS NULL; } {0} ;# The ROWID lookup short-circuits the d=45 constraint sqlite3 db test.db do_execsql_test autoanalyze1-320 { SELECT * FROM t1 WHERE d=45 AND a IN (45,46); } {45 45 45 45} do_execsql_test autoanalyze1-321 { SELECT (flgs & 0x0100)!=0 FROM pragma_stats WHERE tbl='t1' AND idx IS NULL; } {1} # Any use of prefix of a unique index triggers the use of stats # sqlite3 db test.db do_execsql_test autoanalyze1-400 { SELECT * FROM t1 WHERE b=45; } {45 45 45 45} do_execsql_test autoanalyze1-401 { SELECT (flgs & 0x0100)!=0 FROM pragma_stats WHERE tbl='t1' AND idx IS NULL; } {1} # The TF_StatsUsed flag is reset when the database is reopened # sqlite3 db test.db do_execsql_test autoanalyze1-500 { SELECT (flgs & 0x0100)!=0 FROM pragma_stats WHERE tbl='t1' AND idx IS NULL; } {0} finish_test