/trunk/test/count.test |
@@ -0,0 +1,192 @@ |
# 2009 February 24 |
# |
# 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. The |
# focus of this file is testing "SELECT count(*)" statements. |
# |
# $Id: count.test,v 1.6 2009/06/05 17:09:12 drh Exp $ |
|
set testdir [file dirname $argv0] |
source $testdir/tester.tcl |
|
# Test plan: |
# |
# count-0.*: Make sure count(*) works on an empty database. (Ticket #3774) |
# |
# count-1.*: Test that the OP_Count instruction appears to work on both |
# tables and indexes. Test both when they contain 0 entries, |
# when all entries are on the root page, and when the b-tree |
# forms a structure 2 and 3 levels deep. |
# |
# count-2.*: Test that |
# |
# |
|
do_test count-0.1 { |
db eval { |
SELECT count(*) FROM sqlite_master; |
} |
} {0} |
|
set iTest 0 |
foreach zIndex [list { |
/* no-op */ |
} { |
CREATE INDEX i1 ON t1(a); |
}] { |
incr iTest |
do_test count-1.$iTest.1 { |
execsql { |
DROP TABLE IF EXISTS t1; |
CREATE TABLE t1(a, b); |
} |
execsql $zIndex |
execsql { SELECT count(*) FROM t1 } |
} {0} |
|
do_test count-1.$iTest.2 { |
execsql { |
INSERT INTO t1 VALUES(1, 2); |
INSERT INTO t1 VALUES(3, 4); |
SELECT count(*) FROM t1; |
} |
} {2} |
|
do_test count-1.$iTest.3 { |
execsql { |
INSERT INTO t1 SELECT * FROM t1; -- 4 |
INSERT INTO t1 SELECT * FROM t1; -- 8 |
INSERT INTO t1 SELECT * FROM t1; -- 16 |
INSERT INTO t1 SELECT * FROM t1; -- 32 |
INSERT INTO t1 SELECT * FROM t1; -- 64 |
INSERT INTO t1 SELECT * FROM t1; -- 128 |
INSERT INTO t1 SELECT * FROM t1; -- 256 |
SELECT count(*) FROM t1; |
} |
} {256} |
|
do_test count-1.$iTest.4 { |
execsql { |
INSERT INTO t1 SELECT * FROM t1; -- 512 |
INSERT INTO t1 SELECT * FROM t1; -- 1024 |
INSERT INTO t1 SELECT * FROM t1; -- 2048 |
INSERT INTO t1 SELECT * FROM t1; -- 4096 |
SELECT count(*) FROM t1; |
} |
} {4096} |
|
do_test count-1.$iTest.5 { |
execsql { |
BEGIN; |
INSERT INTO t1 SELECT * FROM t1; -- 8192 |
INSERT INTO t1 SELECT * FROM t1; -- 16384 |
INSERT INTO t1 SELECT * FROM t1; -- 32768 |
INSERT INTO t1 SELECT * FROM t1; -- 65536 |
COMMIT; |
SELECT count(*) FROM t1; |
} |
} {65536} |
} |
|
proc uses_op_count {sql} { |
if {[lsearch [execsql "EXPLAIN $sql"] Count]>=0} { |
return 1; |
} |
return 0 |
} |
|
do_test count-2.1 { |
execsql { |
CREATE TABLE t2(a, b); |
} |
uses_op_count {SELECT count(*) FROM t2} |
} {1} |
do_test count-2.2 { |
catchsql {SELECT count(DISTINCT *) FROM t2} |
} {1 {near "*": syntax error}} |
do_test count-2.3 { |
uses_op_count {SELECT count(DISTINCT a) FROM t2} |
} {0} |
do_test count-2.4 { |
uses_op_count {SELECT count(a) FROM t2} |
} {0} |
do_test count-2.5 { |
uses_op_count {SELECT count() FROM t2} |
} {1} |
do_test count-2.6 { |
catchsql {SELECT count(DISTINCT) FROM t2} |
} {1 {DISTINCT aggregates must have exactly one argument}} |
do_test count-2.7 { |
uses_op_count {SELECT count(*)+1 FROM t2} |
} {0} |
do_test count-2.8 { |
uses_op_count {SELECT count(*) FROM t2 WHERE a IS NOT NULL} |
} {0} |
do_test count-2.9 { |
catchsql {SELECT count(*) FROM t2 HAVING count(*)>1} |
} {1 {a GROUP BY clause is required before HAVING}} |
do_test count-2.10 { |
uses_op_count {SELECT count(*) FROM (SELECT 1)} |
} {0} |
do_test count-2.11 { |
execsql { CREATE VIEW v1 AS SELECT 1 AS a } |
uses_op_count {SELECT count(*) FROM v1} |
} {0} |
do_test count-2.12 { |
uses_op_count {SELECT count(*), max(a) FROM t2} |
} {0} |
do_test count-2.13 { |
uses_op_count {SELECT count(*) FROM t1, t2} |
} {0} |
|
ifcapable vtab { |
register_echo_module [sqlite3_connection_pointer db] |
do_test count-2.14 { |
execsql { CREATE VIRTUAL TABLE techo USING echo(t1); } |
uses_op_count {SELECT count(*) FROM techo} |
} {0} |
} |
|
do_test count-3.1 { |
execsql { |
CREATE TABLE t3(a, b); |
SELECT a FROM (SELECT count(*) AS a FROM t3) WHERE a==0; |
} |
} {0} |
do_test count-3.2 { |
execsql { |
SELECT a FROM (SELECT count(*) AS a FROM t3) WHERE a==1; |
} |
} {} |
|
do_test count-4.1 { |
execsql { |
CREATE TABLE t4(a, b); |
INSERT INTO t4 VALUES('a', 'b'); |
CREATE INDEX t4i1 ON t4(b, a); |
SELECT count(*) FROM t4; |
} |
} {1} |
do_test count-4.2 { |
execsql { |
CREATE INDEX t4i2 ON t4(b); |
SELECT count(*) FROM t4; |
} |
} {1} |
do_test count-4.3 { |
execsql { |
DROP INDEX t4i1; |
CREATE INDEX t4i1 ON t4(b, a); |
SELECT count(*) FROM t4; |
} |
} {1} |
|
|
finish_test |