# 2011 August 5 # # 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 regression tests for SQLite library. # This file implements tests for the ANALYZE command under STAT2. # Testing the logic that computes the number of copies of each sample. # set testdir [file dirname $argv0] source $testdir/tester.tcl # There is nothing to test if ANALYZE is disable for this build. # ifcapable {!analyze||!vtab||!stat2} { finish_test return } # Generate some test data # do_test analyze8-1.0 { set x 100 set y 1 set ycnt 0 set yinc 10 execsql { CREATE TABLE t1(x,y); ANALYZE; BEGIN; CREATE INDEX t1x ON t1(x); CREATE INDEX t1y ON t1(y); } for {set i 0} {$i<20} {incr i} { for {set j 0} {$j<300} {incr j} { execsql {INSERT INTO t1 VALUES($x,$y)} incr ycnt if {$ycnt>=$yinc} {set ycnt 0; incr y} } for {set j 0} {$j<100} {incr j} { incr x execsql {INSERT INTO t1 VALUES($x,$y)} incr ycnt if {$ycnt>=$yinc} {set ycnt 0; incr y} } } execsql { COMMIT; ANALYZE; SELECT sample, cnt FROM sqlite_stat2 WHERE idx='t1x' ORDER BY sampleno; } } {200 301 400 301 600 301 800 301 1000 301 1200 301 1400 301 1600 301 1800 301 2000 301} do_test analyze8-1.1 { execsql { SELECT count(*) FROM t1 WHERE x=200; } } {301} do_test analyze8-2.0 { execsql { BEGIN; DELETE FROM t1; } for {set x 1} {$x<200} {incr x} { execsql {INSERT INTO t1 VALUES($x,$x)} } for {set i 0} {$i<200} {incr i} { execsql {INSERT INTO t1 VALUES(999,999)} } execsql { COMMIT; ANALYZE; SELECT sample, cnt FROM sqlite_stat2 WHERE idx='t1x' ORDER BY sampleno; } } {20 1 60 1 100 1 140 1 180 1 999 200 999 200 999 200 999 200 999 200} do_test analyze8-2.1 { for {set i 0} {$i<200} {incr i} { execsql {INSERT INTO t1 VALUES(0,999)} } execsql { ANALYZE; SELECT sample, cnt FROM sqlite_stat2 WHERE idx='t1x' ORDER BY sampleno; } } {0 200 0 200 0 200 10 1 70 1 130 1 190 1 999 200 999 200 999 200}