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Diffstat (limited to 'test/skipscan5.test')
| -rw-r--r-- | test/skipscan5.test | 186 |
1 files changed, 186 insertions, 0 deletions
diff --git a/test/skipscan5.test b/test/skipscan5.test new file mode 100644 index 0000000..5d6d392 --- /dev/null +++ b/test/skipscan5.test @@ -0,0 +1,186 @@ +# 2013-11-13 +# +# 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 of the "skip-scan" query strategy. In +# particular it tests that stat4 data can be used by a range query +# that uses the skip-scan approach. +# + +set testdir [file dirname $argv0] +source $testdir/tester.tcl +set testprefix skipscan5 + +ifcapable !stat4 { + finish_test + return +} + +do_execsql_test 1.1 { + CREATE TABLE t1(a INT, b INT, c INT); + CREATE INDEX i1 ON t1(a, b); +} {} + +expr srand(4) +do_test 1.2 { + for {set i 0} {$i < 100} {incr i} { + set a [expr int(rand()*4.0) + 1] + set b [expr int(rand()*20.0) + 1] + execsql { INSERT INTO t1 VALUES($a, $b, NULL) } + } + execsql ANALYZE +} {} + +foreach {tn q res} { + 1 "b = 5" {/*ANY(a) AND b=?*/} + 2 "b > 12 AND b < 16" {/*ANY(a) AND b>? AND b<?*/} + 3 "b > 2 AND b < 16" {/*SCAN TABLE t1*/} + 4 "b > 18 AND b < 25" {/*ANY(a) AND b>? AND b<?*/} + 5 "b > 15" {/*ANY(a) AND b>?*/} + 6 "b > 5" {/*SCAN TABLE t1*/} + 7 "b < 15" {/*SCAN TABLE t1*/} + 8 "b < 5" {/*ANY(a) AND b<?*/} + 9 "5 > b" {/*ANY(a) AND b<?*/} + 10 "b = '5'" {/*ANY(a) AND b=?*/} + 11 "b > '12' AND b < '16'" {/*ANY(a) AND b>? AND b<?*/} + 12 "b > '2' AND b < '16'" {/*SCAN TABLE t1*/} + 13 "b > '18' AND b < '25'" {/*ANY(a) AND b>? AND b<?*/} + 14 "b > '15'" {/*ANY(a) AND b>?*/} + 15 "b > '5'" {/*SCAN TABLE t1*/} + 16 "b < '15'" {/*SCAN TABLE t1*/} + 17 "b < '5'" {/*ANY(a) AND b<?*/} + 18 "'5' > b" {/*ANY(a) AND b<?*/} +} { + set sql "EXPLAIN QUERY PLAN SELECT * FROM t1 WHERE $q" + do_execsql_test 1.3.$tn $sql $res +} + + +#------------------------------------------------------------------------- +# Test that range-query/skip-scan estimation works with text values. +# And on UTF-16 databases when there is no UTF-16 collation sequence +# available. +# + +proc test_collate {enc lhs rhs} { + string compare $lhs $rhs +} + +foreach {tn dbenc coll} { + 1 UTF-8 { add_test_collate db 0 0 1 } + 2 UTF-16 { add_test_collate db 1 0 0 } + 3 UTF-8 { add_test_collate db 0 1 0 } +} { + reset_db + eval $coll + + do_execsql_test 2.$tn.1 " PRAGMA encoding = '$dbenc' " + do_execsql_test 2.$tn.2 { + CREATE TABLE t2(a TEXT, b TEXT, c TEXT COLLATE test_collate, d TEXT); + CREATE INDEX i2 ON t2(a, b, c); + } + + set vocab(d) { :) } + set vocab(c) { a b c d e f g h i j k l m n o p q r s t } + set vocab(b) { one two three } + set vocab(a) { sql } + + do_test 2.$tn.3 { + for {set i 0} {$i < 100} {incr i} { + foreach var {a b c d} { + set $var [lindex $vocab($var) [expr $i % [llength $vocab($var)]]] + } + execsql { INSERT INTO t2 VALUES($a, $b, $c, $d) } + } + execsql ANALYZE + } {} + + foreach {tn2 q res} { + 1 { c BETWEEN 'd' AND 'e' } {/*ANY(a) AND ANY(b) AND c>? AND c<?*/} + 2 { c BETWEEN 'b' AND 'r' } {/*SCAN TABLE t2*/} + 3 { c > 'q' } {/*ANY(a) AND ANY(b) AND c>?*/} + 4 { c > 'e' } {/*SCAN TABLE t2*/} + 5 { c < 'q' } {/*SCAN TABLE t2*/} + 4 { c < 'e' } {/*ANY(a) AND ANY(b) AND c<?*/} + } { + set sql "EXPLAIN QUERY PLAN SELECT * FROM t2 WHERE $q" + do_execsql_test 2.$tn.$tn2 $sql $res + } + +} + +#------------------------------------------------------------------------- +# Test that range-query/skip-scan estimation works on columns that contain +# a variety of types. +# + +reset_db +do_execsql_test 3.1 { + CREATE TABLE t3(a, b, c); + CREATE INDEX i3 ON t3(a, b); +} + +set values { + NULL NULL NULL + NULL -9567 -9240 + -8725 -8659 -8248.340244520614 + -8208 -7939 -7746.985758536954 + -7057 -6550 -5916 + -5363 -4935.781822975623 -4935.063633571875 + -3518.4554911770183 -2537 -2026 + -1511.2603881914456 -1510.4195994839156 -1435 + -1127.4210136045804 -1045 99 + 1353 1457 1563.2908193223611 + 2245 2286 2552 + 2745.18831295203 2866.279926554429 3075.0468527316334 + 3447 3867 4237.892420141907 + 4335 5052.9775000424015 5232.178240656935 + 5541.784919585003 5749.725576373621 5758 + 6005 6431 7263.477992854769 + 7441 7541 8667.279760663994 + 8857 9199.638673662972 'dl' + 'dro' 'h' 'igprfq' + 'jnbd' 'k' 'kordee' + 'lhwcv' 'mzlb' 'nbjked' + 'nufpo' 'nxqkdq' 'shelln' + 'tvzn' 'wpnt' 'wylf' + 'ydkgu' 'zdb' X'' + X'0a' X'203f6429f1f33f' X'23858e324545e0362b' + X'3f9f8a' X'516f7ddd4b' X'68f1df0930ac6b' + X'9ea60d' X'a06f' X'aefd342a39ce36df' + X'afaa020fe2' X'be201c' X'c47d97b209601e45' +} + +do_test 3.2 { + set c 0 + foreach v $values { + execsql "INSERT INTO t3 VALUES($c % 2, $v, $c)" + incr c + } + execsql ANALYZE +} {} + +foreach {tn q res} { + 1 "b BETWEEN -10000 AND -8000" {/*ANY(a) AND b>? AND b<?*/} + 2 "b BETWEEN -10000 AND 'qqq'" {/*SCAN TABLE t3*/} + 3 "b < X'5555'" {/*SCAN TABLE t3*/} + 4 "b > X'5555'" {/*ANY(a) AND b>?*/} + 5 "b > 'zzz'" {/*ANY(a) AND b>?*/} + 6 "b < 'zzz'" {/*SCAN TABLE t3*/} +} { + set sql "EXPLAIN QUERY PLAN SELECT * FROM t3 WHERE $q" + do_execsql_test 3.3.$tn $sql $res +} + +finish_test + + + + |