mirror of https://github.com/sqlite/sqlite
149 lines
4.0 KiB
Plaintext
149 lines
4.0 KiB
Plaintext
# 2001 September 15
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#
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# The author disclaims copyright to this source code. In place of
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# a legal notice, here is a blessing:
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#
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# May you do good and not evil.
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# May you find forgiveness for yourself and forgive others.
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# May you share freely, never taking more than you give.
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#
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#***********************************************************************
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# This file implements regression tests for SQLite library. The
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# focus of this file is testing the use of indices in WHERE clases.
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#
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# $Id: where.test,v 1.3 2001/09/16 00:13:28 drh Exp $
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set testdir [file dirname $argv0]
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source $testdir/tester.tcl
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# Build some test data
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#
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do_test where-1.0 {
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execsql {
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CREATE TABLE t1(w int, x int, y int);
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CREATE TABLE t2(p int, q int, r int, s int);
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}
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for {set i 1} {$i<=100} {incr i} {
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set w $i
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set x [expr {int(log($i)/log(2))}]
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set y [expr {$i*$i + 2*$i + 1}]
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execsql "INSERT INTO t1 VALUES($w,$x,$y)"
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}
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execsql {
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INSERT INTO t2 SELECT 101-w, x, (SELECT max(y) FROM t1)+1-y, y FROM t1;
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CREATE INDEX i1w ON t1(w);
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CREATE INDEX i1xy ON t1(x,y);
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CREATE INDEX i2p ON t2(p);
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CREATE INDEX i2r ON t2(r);
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CREATE INDEX i2qs ON t2(q, s);
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}
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} {}
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# Verify that queries use an index. We are using the special "fcnt(*)"
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# function to verify the results. fcnt(*) returns the number of Fetch
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# operations that have occurred up to the point where fcnt(*) is invoked.
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# By verifing that fcnt(*) returns a small number we know that an index
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# was used instead of an exhaustive search.
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#
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do_test where-1.1 {
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execsql {SELECT x, y, fcnt(*) FROM t1 WHERE w=10}
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} {3 121 1}
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do_test where-1.2 {
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execsql {SELECT x, y, fcnt(*) FROM t1 WHERE w=11}
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} {3 144 1}
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do_test where-1.3 {
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execsql {SELECT x, y, fcnt(*) FROM t1 WHERE 11=w}
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} {3 144 1}
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do_test where-1.4 {
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execsql {SELECT x, y, fcnt(*) FROM t1 WHERE 11=w AND x>2}
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} {3 144 1}
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do_test where-1.5 {
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execsql {SELECT x, y, fcnt(*) FROM t1 WHERE y<200 AND w=11 AND x>2}
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} {3 144 1}
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do_test where-1.6 {
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execsql {SELECT x, y, fcnt(*) FROM t1 WHERE y<200 AND x>2 AND w=11}
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} {3 144 1}
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do_test where-1.7 {
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execsql {SELECT x, y, fcnt(*) FROM t1 WHERE w=11 AND y<200 AND x>2}
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} {3 144 1}
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do_test where-1.8 {
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execsql {SELECT x, y, fcnt(*) FROM t1 WHERE w>10 AND y=144 AND x=3}
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} {3 144 1}
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do_test where-1.9 {
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execsql {SELECT x, y, fcnt(*) FROM t1 WHERE y=144 AND w>10 AND x=3}
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} {3 144 1}
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do_test where-1.10 {
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execsql {SELECT x, y, fcnt(*) FROM t1 WHERE x=3 AND w>=10 AND y=121}
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} {3 121 1}
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do_test where-1.11 {
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execsql {SELECT x, y, fcnt(*) FROM t1 WHERE x=3 AND y=100 AND w<10}
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} {3 100 1}
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# Do the same kind of thing except use a join as the data source.
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#
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do_test where-2.1 {
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execsql {
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SELECT w, p, fcnt(*) FROM t2, t1
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WHERE x=q AND y=s AND r=8977
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}
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} {34 67 2}
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do_test where-2.2 {
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execsql {
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SELECT w, p, fcnt(*) FROM t2, t1
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WHERE x=q AND s=y AND r=8977
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}
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} {34 67 2}
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do_test where-2.3 {
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execsql {
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SELECT w, p, fcnt(*) FROM t2, t1
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WHERE x=q AND s=y AND r=8977 AND w>10
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}
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} {34 67 2}
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do_test where-2.4 {
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execsql {
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SELECT w, p, fcnt(*) FROM t2, t1
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WHERE p<80 AND x=q AND s=y AND r=8977 AND w>10
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}
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} {34 67 2}
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do_test where-2.5 {
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execsql {
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SELECT w, p, fcnt(*) FROM t2, t1
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WHERE p<80 AND x=q AND 8977=r AND s=y AND w>10
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}
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} {34 67 2}
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do_test where-2.6 {
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execsql {
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SELECT w, p, fcnt(*) FROM t2, t1
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WHERE x=q AND p=77 AND s=y AND w>5
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}
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} {24 77 2}
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do_test where-2.7 {
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execsql {
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SELECT w, p, fcnt(*) FROM t1, t2
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WHERE x=q AND p>77 AND s=y AND w=5
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}
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} {5 96 2}
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# Lets do a 3-way join.
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#
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do_test where-3.1 {
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execsql {
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SELECT A.w, B.p, C.w, fcnt(*) FROM t1 as A, t2 as B, t1 as C
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WHERE C.w=101-B.p AND B.r=10202-A.y AND A.w=11
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}
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} {11 90 11 3}
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do_test where-3.2 {
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execsql {
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SELECT A.w, B.p, C.w, fcnt(*) FROM t1 as A, t2 as B, t1 as C
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WHERE C.w=101-B.p AND B.r=10202-A.y AND A.w=12
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}
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} {12 89 12 3}
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do_test where-3.3 {
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execsql {
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SELECT A.w, B.p, C.w, fcnt(*) FROM t1 as A, t2 as B, t1 as C
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WHERE A.w=15 AND B.p=C.w AND B.r=10202-A.y
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}
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} {15 86 86 3}
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finish_test
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