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Diffstat (limited to 'test/count.test')
| -rw-r--r-- | test/count.test | 192 |
1 files changed, 192 insertions, 0 deletions
diff --git a/test/count.test b/test/count.test new file mode 100644 index 0000000..fbdd13b --- /dev/null +++ b/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 |