Annotation of embedaddon/sqlite3/test/count.test, revision 1.1
1.1 ! misho 1: # 2009 February 24
! 2: #
! 3: # The author disclaims copyright to this source code. In place of
! 4: # a legal notice, here is a blessing:
! 5: #
! 6: # May you do good and not evil.
! 7: # May you find forgiveness for yourself and forgive others.
! 8: # May you share freely, never taking more than you give.
! 9: #
! 10: #***********************************************************************
! 11: # This file implements regression tests for SQLite library. The
! 12: # focus of this file is testing "SELECT count(*)" statements.
! 13: #
! 14: # $Id: count.test,v 1.6 2009/06/05 17:09:12 drh Exp $
! 15:
! 16: set testdir [file dirname $argv0]
! 17: source $testdir/tester.tcl
! 18:
! 19: # Test plan:
! 20: #
! 21: # count-0.*: Make sure count(*) works on an empty database. (Ticket #3774)
! 22: #
! 23: # count-1.*: Test that the OP_Count instruction appears to work on both
! 24: # tables and indexes. Test both when they contain 0 entries,
! 25: # when all entries are on the root page, and when the b-tree
! 26: # forms a structure 2 and 3 levels deep.
! 27: #
! 28: # count-2.*: Test that
! 29: #
! 30: #
! 31:
! 32: do_test count-0.1 {
! 33: db eval {
! 34: SELECT count(*) FROM sqlite_master;
! 35: }
! 36: } {0}
! 37:
! 38: set iTest 0
! 39: foreach zIndex [list {
! 40: /* no-op */
! 41: } {
! 42: CREATE INDEX i1 ON t1(a);
! 43: }] {
! 44: incr iTest
! 45: do_test count-1.$iTest.1 {
! 46: execsql {
! 47: DROP TABLE IF EXISTS t1;
! 48: CREATE TABLE t1(a, b);
! 49: }
! 50: execsql $zIndex
! 51: execsql { SELECT count(*) FROM t1 }
! 52: } {0}
! 53:
! 54: do_test count-1.$iTest.2 {
! 55: execsql {
! 56: INSERT INTO t1 VALUES(1, 2);
! 57: INSERT INTO t1 VALUES(3, 4);
! 58: SELECT count(*) FROM t1;
! 59: }
! 60: } {2}
! 61:
! 62: do_test count-1.$iTest.3 {
! 63: execsql {
! 64: INSERT INTO t1 SELECT * FROM t1; -- 4
! 65: INSERT INTO t1 SELECT * FROM t1; -- 8
! 66: INSERT INTO t1 SELECT * FROM t1; -- 16
! 67: INSERT INTO t1 SELECT * FROM t1; -- 32
! 68: INSERT INTO t1 SELECT * FROM t1; -- 64
! 69: INSERT INTO t1 SELECT * FROM t1; -- 128
! 70: INSERT INTO t1 SELECT * FROM t1; -- 256
! 71: SELECT count(*) FROM t1;
! 72: }
! 73: } {256}
! 74:
! 75: do_test count-1.$iTest.4 {
! 76: execsql {
! 77: INSERT INTO t1 SELECT * FROM t1; -- 512
! 78: INSERT INTO t1 SELECT * FROM t1; -- 1024
! 79: INSERT INTO t1 SELECT * FROM t1; -- 2048
! 80: INSERT INTO t1 SELECT * FROM t1; -- 4096
! 81: SELECT count(*) FROM t1;
! 82: }
! 83: } {4096}
! 84:
! 85: do_test count-1.$iTest.5 {
! 86: execsql {
! 87: BEGIN;
! 88: INSERT INTO t1 SELECT * FROM t1; -- 8192
! 89: INSERT INTO t1 SELECT * FROM t1; -- 16384
! 90: INSERT INTO t1 SELECT * FROM t1; -- 32768
! 91: INSERT INTO t1 SELECT * FROM t1; -- 65536
! 92: COMMIT;
! 93: SELECT count(*) FROM t1;
! 94: }
! 95: } {65536}
! 96: }
! 97:
! 98: proc uses_op_count {sql} {
! 99: if {[lsearch [execsql "EXPLAIN $sql"] Count]>=0} {
! 100: return 1;
! 101: }
! 102: return 0
! 103: }
! 104:
! 105: do_test count-2.1 {
! 106: execsql {
! 107: CREATE TABLE t2(a, b);
! 108: }
! 109: uses_op_count {SELECT count(*) FROM t2}
! 110: } {1}
! 111: do_test count-2.2 {
! 112: catchsql {SELECT count(DISTINCT *) FROM t2}
! 113: } {1 {near "*": syntax error}}
! 114: do_test count-2.3 {
! 115: uses_op_count {SELECT count(DISTINCT a) FROM t2}
! 116: } {0}
! 117: do_test count-2.4 {
! 118: uses_op_count {SELECT count(a) FROM t2}
! 119: } {0}
! 120: do_test count-2.5 {
! 121: uses_op_count {SELECT count() FROM t2}
! 122: } {1}
! 123: do_test count-2.6 {
! 124: catchsql {SELECT count(DISTINCT) FROM t2}
! 125: } {1 {DISTINCT aggregates must have exactly one argument}}
! 126: do_test count-2.7 {
! 127: uses_op_count {SELECT count(*)+1 FROM t2}
! 128: } {0}
! 129: do_test count-2.8 {
! 130: uses_op_count {SELECT count(*) FROM t2 WHERE a IS NOT NULL}
! 131: } {0}
! 132: do_test count-2.9 {
! 133: catchsql {SELECT count(*) FROM t2 HAVING count(*)>1}
! 134: } {1 {a GROUP BY clause is required before HAVING}}
! 135: do_test count-2.10 {
! 136: uses_op_count {SELECT count(*) FROM (SELECT 1)}
! 137: } {0}
! 138: do_test count-2.11 {
! 139: execsql { CREATE VIEW v1 AS SELECT 1 AS a }
! 140: uses_op_count {SELECT count(*) FROM v1}
! 141: } {0}
! 142: do_test count-2.12 {
! 143: uses_op_count {SELECT count(*), max(a) FROM t2}
! 144: } {0}
! 145: do_test count-2.13 {
! 146: uses_op_count {SELECT count(*) FROM t1, t2}
! 147: } {0}
! 148:
! 149: ifcapable vtab {
! 150: register_echo_module [sqlite3_connection_pointer db]
! 151: do_test count-2.14 {
! 152: execsql { CREATE VIRTUAL TABLE techo USING echo(t1); }
! 153: uses_op_count {SELECT count(*) FROM techo}
! 154: } {0}
! 155: }
! 156:
! 157: do_test count-3.1 {
! 158: execsql {
! 159: CREATE TABLE t3(a, b);
! 160: SELECT a FROM (SELECT count(*) AS a FROM t3) WHERE a==0;
! 161: }
! 162: } {0}
! 163: do_test count-3.2 {
! 164: execsql {
! 165: SELECT a FROM (SELECT count(*) AS a FROM t3) WHERE a==1;
! 166: }
! 167: } {}
! 168:
! 169: do_test count-4.1 {
! 170: execsql {
! 171: CREATE TABLE t4(a, b);
! 172: INSERT INTO t4 VALUES('a', 'b');
! 173: CREATE INDEX t4i1 ON t4(b, a);
! 174: SELECT count(*) FROM t4;
! 175: }
! 176: } {1}
! 177: do_test count-4.2 {
! 178: execsql {
! 179: CREATE INDEX t4i2 ON t4(b);
! 180: SELECT count(*) FROM t4;
! 181: }
! 182: } {1}
! 183: do_test count-4.3 {
! 184: execsql {
! 185: DROP INDEX t4i1;
! 186: CREATE INDEX t4i1 ON t4(b, a);
! 187: SELECT count(*) FROM t4;
! 188: }
! 189: } {1}
! 190:
! 191:
! 192: finish_test
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