~drizzle-trunk/drizzle/development

1 by brian
clean slate
1
drop table if exists t1, t2, t3, t4;
2
CREATE TABLE t1
3
(
1217 by Brian Aker
Removed bits of charset support from the parser.
4
DOCID VARCHAR(32) NOT NULL
1996.2.1 by Brian Aker
uuid type code.
5
, UUID_t VARCHAR(32) NOT NULL DEFAULT ""
1217 by Brian Aker
Removed bits of charset support from the parser.
6
, MIMETYPE VARCHAR(80)
1 by brian
clean slate
7
, CONTENTDATA LONGBLOB
8
, CONTENTSIZE INTEGER
9
, VERSIONID INTEGER
1217 by Brian Aker
Removed bits of charset support from the parser.
10
, REPID VARCHAR(32)
1 by brian
clean slate
11
, MODIFIED TIMESTAMP
1217 by Brian Aker
Removed bits of charset support from the parser.
12
, MODIFIER VARCHAR(255)
1 by brian
clean slate
13
, ORIGINATOR INTEGER
14
, PRIMARY KEY ( DOCID )
15
) ENGINE=InnoDB
16
;
17
INSERT INTO t1 (DOCID) VALUES ("1"), ("2");
18
CREATE TABLE t2
19
(
1217 by Brian Aker
Removed bits of charset support from the parser.
20
DOCID VARCHAR(32) NOT NULL
21
, DOCNAME VARCHAR(255) NOT NULL
22
, DOCTYPEID VARCHAR(32) NOT NULL
23
, FOLDERID VARCHAR(32) NOT NULL
24
, AUTHOR VARCHAR(255)
1 by brian
clean slate
25
, CREATED TIMESTAMP NOT NULL
1217 by Brian Aker
Removed bits of charset support from the parser.
26
, TITLE VARCHAR(255)
27
, SUBTITLE VARCHAR(255)
1 by brian
clean slate
28
, DOCABSTRACT LONGBLOB
29
, PUBLISHDATE TIMESTAMP
30
, EXPIRATIONDATE TIMESTAMP
1217 by Brian Aker
Removed bits of charset support from the parser.
31
, LOCKEDBY VARCHAR(80)
32
, STATUS VARCHAR(80)
33
, PARENTDOCID VARCHAR(32)
34
, REPID VARCHAR(32)
907.1.7 by Jay Pipes
Merged in remove-timezone work
35
, MODIFIED TIMESTAMP
1217 by Brian Aker
Removed bits of charset support from the parser.
36
, MODIFIER VARCHAR(255)  NOT NULL
1 by brian
clean slate
37
, PUBLISHSTATUS INTEGER
38
, ORIGINATOR INTEGER
39
, PRIMARY KEY ( DOCID )
40
) ENGINE=InnoDB
41
;
42
CREATE INDEX DDOCTYPEID_IDX ON t2 (DOCTYPEID);
43
CREATE INDEX DFOLDERID_IDX ON t2 (FOLDERID);
44
CREATE TABLE t3
45
(
1217 by Brian Aker
Removed bits of charset support from the parser.
46
FOLDERID VARCHAR(32) NOT NULL
47
, FOLDERNAME VARCHAR(255) NOT NULL
48
, CREATOR VARCHAR(255)
1 by brian
clean slate
49
, CREATED TIMESTAMP NOT NULL
1217 by Brian Aker
Removed bits of charset support from the parser.
50
, DESCRIPTION VARCHAR(255)
1 by brian
clean slate
51
, FOLDERTYPE INTEGER NOT NULL
52
, MODIFIED TIMESTAMP
1217 by Brian Aker
Removed bits of charset support from the parser.
53
, MODIFIER VARCHAR(255)
1 by brian
clean slate
54
, FOLDERSIZE INTEGER NOT NULL
1217 by Brian Aker
Removed bits of charset support from the parser.
55
, PARENTID VARCHAR(32)
56
, REPID VARCHAR(32)
1 by brian
clean slate
57
, ORIGINATOR INTEGER
58
, PRIMARY KEY ( FOLDERID )
59
) ENGINE=InnoDB;
60
CREATE INDEX FFOLDERID_IDX ON t3 (FOLDERID);
61
CREATE INDEX CMFLDRPARNT_IDX ON t3 (PARENTID);
62
CREATE TABLE t4
63
(
1217 by Brian Aker
Removed bits of charset support from the parser.
64
DOCTYPEID VARCHAR(32) NOT NULL
65
, DOCTYPENAME VARCHAR(80) NOT NULL
66
, DESCRIPTION VARCHAR(255)
1 by brian
clean slate
67
, EXTNDATA LONGBLOB
68
, MODIFIED TIMESTAMP
1217 by Brian Aker
Removed bits of charset support from the parser.
69
, MODIFIER VARCHAR(255)
1 by brian
clean slate
70
, ORIGINATOR INTEGER
71
, PRIMARY KEY ( DOCTYPEID )
72
) ENGINE=InnoDB;
73
INSERT INTO t2 VALUES("c373e9f59cf15a6c3e57444553544200", "c373e9f59cf15a6c3e57444553544200", "340d243d45f111d497b00010a4ef934d", "2f6161e879db43c1a5b82c21ddc49089", NULL, "2003-06-06 07:48:42", NULL, NULL, NULL, "2003-06-06 07:48:42", "2003-06-06 07:48:42", NULL, NULL, NULL, "03eea05112b845949f3fd03278b5fe43", "2003-06-06 07:48:42", "admin", "0", NULL);
74
INSERT INTO t2 VALUES("c373e9f5a472f43ba45e444553544200", "c373e9f5a472f43ba45e444553544200", "340d243d45f111d497b00010a4ef934d", "2f6161e879db43c1a5b82c21ddc49089", NULL, "2003-06-07 18:50:12", NULL, NULL, NULL, "2003-06-07 18:50:12", "2003-06-07 18:50:12", NULL, NULL, NULL, "03eea05112b845949f3fd03278b5fe43", "2003-06-07 18:50:12", "admin", "0", NULL);
75
INSERT INTO t2 VALUES("c373e9f5a4a0f56014eb444553544200", "c373e9f5a4a0f56014eb444553544200", "340d243d45f111d497b00010a4ef934d", "2f6161e879db43c1a5b82c21ddc49089", NULL, "2003-06-07 19:39:26", NULL, NULL, NULL, "2003-06-07 19:39:26", "2003-06-07 19:39:26", NULL, NULL, NULL, "03eea05112b845949f3fd03278b5fe43", "2003-06-07 19:39:26", "admin", "0", NULL);
76
INSERT INTO t2 VALUES("c373e9f5a4a0f8fa4a86444553544200", "c373e9f5a4a0f8fa4a86444553544200", "340d243d45f111d497b00010a4ef934d", "2f6161e879db43c1a5b82c21ddc49089", NULL, "2003-06-07 19:43:05", NULL, NULL, NULL, "2003-06-07 19:43:05", "2003-06-07 19:43:05", NULL, NULL, NULL, "03eea05112b845949f3fd03278b5fe43", "2003-06-07 19:43:05", "admin", "0", NULL);
77
INSERT INTO t2 VALUES("c373e9f5ac7b537205ce444553544200", "c373e9f5ac7b537205ce444553544200", "340d243d45f111d497b00010a4ef934d", "2f6161e879db43c1a5b82c21ddc49089", NULL, "2003-06-09 08:15:24", NULL, NULL, NULL, "2003-06-09 08:15:24", "2003-06-09 08:15:24", NULL, NULL, NULL, "03eea05112b845949f3fd03278b5fe43", "2003-06-09 08:15:24", "admin", "0", NULL);
78
INSERT INTO t2 VALUES("c373e9f5ad0792012454444553544200", "c373e9f5ad0792012454444553544200", "340d243d45f111d497b00010a4ef934d", "2f6161e879db43c1a5b82c21ddc49089", NULL, "2003-06-09 10:51:44", NULL, NULL, NULL, "2003-06-09 10:51:44", "2003-06-09 10:51:44", NULL, NULL, NULL, "03eea05112b845949f3fd03278b5fe43", "2003-06-09 10:51:44", "admin", "0", NULL);
79
INSERT INTO t2 VALUES("c373e9f5ad079821ef34444553544200", "First Discussion", "c373e9f5ad079174ff17444553544200", "c373e9f5ad0796c0eca4444553544200", "Goldilocks", "2003-06-09 11:16:50", "Title: First Discussion", NULL, NULL, "2003-06-09 10:51:26", "2003-06-09 10:51:26", NULL, NULL, NULL, "03eea05112b845949f3fd03278b5fe43", "2003-06-09 11:16:50", "admin", "0", NULL);
80
INSERT INTO t2 VALUES("c373e9f5ad07993f3859444553544200", "Last Discussion", "c373e9f5ad079174ff17444553544200", "c373e9f5ad0796c0eca4444553544200", "Goldilocks", "2003-06-09 11:21:06", "Title: Last Discussion", NULL, "Setting new abstract and keeping doc checked out", "2003-06-09 10:51:26", "2003-06-09 10:51:26", NULL, NULL, NULL, "03eea05112b845949f3fd03278b5fe43", "2003-06-09 11:21:06", "admin", "0", NULL);
81
INSERT INTO t2 VALUES("c373e9f5ad079a3219c4444553544200", "testdoclayout", "340d243c45f111d497b00010a4ef934d", "c373e9f5ad0796c0eca4444553544200", "Goldilocks", "2003-06-09 11:25:31", "Title: Test doc layout", "Subtitle: test doc layout", NULL, "2003-06-09 10:51:27", "2003-06-09 10:51:27", NULL, NULL, NULL, "03eea05112b845949f3fd03278b5fe43", "2003-06-09 11:25:31", "admin", "0", NULL);
82
INSERT INTO t3 VALUES("0c9aab05b15048c59bc35c8461507deb", "System", "System", "2003-06-05 16:30:00", "The system content repository folder.", "3", "2003-06-05 16:30:00", "System", "0", NULL, "9c9aab05b15048c59bc35c8461507deb", "1");
83
INSERT INTO t3 VALUES("2f6161e879db43c1a5b82c21ddc49089", "Default", "System", "2003-06-09 10:52:02", "The default content repository folder.", "3", "2003-06-05 16:30:00", "System", "0", NULL, "03eea05112b845949f3fd03278b5fe43", "1");
84
INSERT INTO t3 VALUES("c373e9f5ad0791724315444553544200", "AddDocumentTest", "admin", "2003-06-09 10:51:25", "Movie Reviews", "0", "2003-06-09 10:51:25", "admin", "0", "2f6161e879db43c1a5b82c21ddc49089", "03eea05112b845949f3fd03278b5fe43", NULL);
85
INSERT INTO t3 VALUES("c373e9f5ad07919e1963444553544200", "NewDestDirectory", "admin", "2003-06-09 10:51:28", "Adding new directory", "128", "2003-06-09 10:51:28", "admin", "0", "2f6161e879db43c1a5b82c21ddc49089", "03eea05112b845949f3fd03278b5fe43", NULL);
86
INSERT INTO t3 VALUES("c373e9f5ad07919fe525444553544200", "SubDestDirectory", "admin", "2003-06-09 10:51:28", "Adding new directory", "128", "2003-06-09 10:51:28", "admin", "0", "c373e9f5ad07919e1963444553544200", "03eea05112b845949f3fd03278b5fe43", NULL);
87
INSERT INTO t3 VALUES("c373e9f5ad0791a0dab5444553544200", "Level1", "admin", "2003-06-09 10:51:29", NULL, "0", "2003-06-09 10:51:29", "admin", "0", "2f6161e879db43c1a5b82c21ddc49089", "03eea05112b845949f3fd03278b5fe43", NULL);
88
INSERT INTO t3 VALUES("c373e9f5ad0791a14669444553544200", "Level2", "admin", "2003-06-09 10:51:29", NULL, "0", "2003-06-09 10:51:29", "admin", "0", "c373e9f5ad0791a0dab5444553544200", "03eea05112b845949f3fd03278b5fe43", NULL);
89
INSERT INTO t3 VALUES("c373e9f5ad0791a23c0e444553544200", "Level3", "admin", "2003-06-09 10:51:29", NULL, "0", "2003-06-09 10:51:29", "admin", "0", "c373e9f5ad0791a14669444553544200", "03eea05112b845949f3fd03278b5fe43", NULL);
90
INSERT INTO t3 VALUES("c373e9f5ad0791a6b11f444553544200", "Dir1", "admin", "2003-06-09 10:51:30", NULL, "0", "2003-06-09 10:51:30", "admin", "0", "2f6161e879db43c1a5b82c21ddc49089", "03eea05112b845949f3fd03278b5fe43", NULL);
91
INSERT INTO t3 VALUES("c373e9f5ad0791a897d6444553544200", "Dir2", "admin", "2003-06-09 10:51:30", NULL, "0", "2003-06-09 10:51:30", "admin", "0", "c373e9f5ad0791a6b11f444553544200", "03eea05112b845949f3fd03278b5fe43", NULL);
92
INSERT INTO t3 VALUES("c373e9f5ad0791a9a063444553544200", "NewDestDirectory", "admin", "2003-06-09 10:51:31", NULL, "0", "2003-06-09 10:51:31", "admin", "0", "c373e9f5ad0791a897d6444553544200", "03eea05112b845949f3fd03278b5fe43", NULL);
93
INSERT INTO t3 VALUES("c373e9f5ad0791aa73e3444553544200", "LevelA", "admin", "2003-06-09 10:51:31", NULL, "0", "2003-06-09 10:51:31", "admin", "0", "c373e9f5ad0791a0dab5444553544200", "03eea05112b845949f3fd03278b5fe43", NULL);
94
INSERT INTO t3 VALUES("c373e9f5ad0791ab034b444553544200", "LevelB", "admin", "2003-06-09 10:51:31", NULL, "0", "2003-06-09 10:51:31", "admin", "0", "c373e9f5ad0791aa73e3444553544200", "03eea05112b845949f3fd03278b5fe43", NULL);
95
INSERT INTO t3 VALUES("c373e9f5ad0791ac7311444553544200", "LevelC", "admin", "2003-06-09 10:51:32", NULL, "0", "2003-06-09 10:51:32", "admin", "0", "c373e9f5ad0791ab034b444553544200", "03eea05112b845949f3fd03278b5fe43", NULL);
96
INSERT INTO t3 VALUES("c373e9f5ad0791ad66cf444553544200", "test2", "admin", "2003-06-09 10:51:32", NULL, "0", "2003-06-09 10:51:32", "admin", "0", "c373e9f5ad0791724315444553544200", "03eea05112b845949f3fd03278b5fe43", NULL);
97
INSERT INTO t3 VALUES("c373e9f5ad0791aebd87444553544200", "test3", "admin", "2003-06-09 10:51:33", NULL, "0", "2003-06-09 10:51:33", "admin", "0", "c373e9f5ad0791ad66cf444553544200", "03eea05112b845949f3fd03278b5fe43", NULL);
642.1.80 by Lee
merge with latest from the trunk
98
INSERT INTO t3 VALUES("c373e9f5ad0791dbaac4444553544200", "Special Caf Folder", "admin", "2003-06-09 10:51:43", "test folder names with special chars", "0", "2003-06-09 10:51:43", "admin", "0", "2f6161e879db43c1a5b82c21ddc49089", "03eea05112b845949f3fd03278b5fe43", NULL);
1 by brian
clean slate
99
INSERT INTO t3 VALUES("c373e9f5ad0796bf913f444553544200", "CopiedFolder", "admin", "2003-06-09 11:09:05", "Movie Reviews", "0", "2003-06-09 11:09:05", "admin", "0", "c373e9f5ad0791a23c0e444553544200", "03eea05112b845949f3fd03278b5fe43", NULL);
100
INSERT INTO t3 VALUES("c373e9f5ad0796c0eca4444553544200", "Movie Reviews", "admin", "2003-06-09 11:09:13", "Movie Reviews", "0", "2003-06-09 11:09:13", "admin", "33", "c373e9f5ad0796bf913f444553544200", "03eea05112b845949f3fd03278b5fe43", NULL);
101
INSERT INTO t3 VALUES("c373e9f5ad0796d9b895444553544200", "NewBookFolder", "admin", "2003-06-09 11:12:41", "NewBooks - folder", "0", "2003-06-09 11:12:41", "admin", "0", "c373e9f5ad0796c0eca4444553544200", "03eea05112b845949f3fd03278b5fe43", NULL);
102
INSERT INTO t3 VALUES("c373e9f5ad079b4c9355444553544200", "CopiedFolder", "admin", "2003-06-09 11:26:34", "Movie Reviews", "0", "2003-06-09 11:26:34", "admin", "0", "2f6161e879db43c1a5b82c21ddc49089", "03eea05112b845949f3fd03278b5fe43", NULL);
103
INSERT INTO t4 VALUES("340d243c45f111d497b00010a4ef934d", "Document Layout", "The system Document Layouts Document Type", NULL, "2003-06-05 16:30:00", "System", "1");
104
INSERT INTO t4 VALUES("340d243d45f111d497b00010a4ef934d", "Default", "The default system Document Type", NULL, "2003-06-05 16:30:00", "System", "1");
105
INSERT INTO t4 VALUES("4d09dd60850711d4998a204c4f4f5020", "__SystemResourceType", "The type for all the uploaded resources", NULL, "2003-06-05 16:30:00", "System", "1");
106
INSERT INTO t4 VALUES("91d4d595478211d497b40010a4ef934d", "__PmcSystemDefaultType", "The type for all the default available fields", NULL, "2003-06-05 16:30:00", "System", "1");
107
INSERT INTO t4 VALUES("c373e9f59cf15a59b08a444553544200", "NoFieldDocType", "plain doc type", NULL, "2003-06-06 07:48:40", "admin", NULL);
108
INSERT INTO t4 VALUES("c373e9f59cf15a5c6a99444553544200", "Movie Review", "This doc type is for movie reviews", "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\r\n<props autocheckin=\"false\" autopublish=\"false\" binary=\"choice\" categories=\"none\" cleanup=\"false\" folder=\"none\"><![CDATA[Doc type for cm tests]]></props>\r\n", "2003-06-06 07:48:40", "admin", NULL);
109
INSERT INTO t4 VALUES("c373e9f59cf15a695d47444553544200", "Movie", NULL, NULL, "2003-06-06 07:48:41", "admin", NULL);
110
INSERT INTO t4 VALUES("c373e9f5ad079174ff17444553544200", "Discussion", NULL, NULL, "2003-06-09 10:51:25", "admin", NULL);
111
INSERT INTO t4 VALUES("c373e9f5ad0791da7e2b444553544200", "Books", "list of recommended books", "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\r\n<props autocheckin=\"false\" autopublish=\"false\" binary=\"choice\" categories=\"none\" cleanup=\"false\" folder=\"none\"><![CDATA[Doc type for cm tests]]><![CDATA[Doc type for book tests]]></props>\r\n", "2003-06-09 10:51:40", "admin", NULL);
112
ALTER TABLE t2 ADD  FOREIGN KEY FK_DCMNTS_DCTYPES ( DOCTYPEID)
113
REFERENCES t4 (DOCTYPEID );
114
ALTER TABLE t2 ADD  FOREIGN KEY FK_DCMNTS_FLDRS ( FOLDERID)
115
REFERENCES t3 (FOLDERID );
116
ALTER TABLE t3 ADD  FOREIGN KEY FK_FLDRS_PRNTID ( PARENTID)
117
REFERENCES t3 (FOLDERID );
118
SELECT t2.*, t4.DOCTYPENAME, t1.CONTENTSIZE,t1.MIMETYPE FROM t2 INNER JOIN t4 ON t2.DOCTYPEID = t4.DOCTYPEID LEFT OUTER JOIN t1 ON t2.DOCID = t1.DOCID WHERE t2.FOLDERID IN(SELECT t3.FOLDERID FROM t3 WHERE t3.PARENTID IN(SELECT t3.FOLDERID FROM t3 WHERE t3.PARENTID IN(SELECT t3.FOLDERID FROM t3 WHERE t3.PARENTID IN(SELECT t3.FOLDERID FROM t3 WHERE t3.PARENTID IN(SELECT t3.FOLDERID FROM t3 WHERE t3.PARENTID='2f6161e879db43c1a5b82c21ddc49089' AND t3.FOLDERNAME = 'Level1') AND t3.FOLDERNAME = 'Level2') AND t3.FOLDERNAME = 'Level3') AND t3.FOLDERNAME = 'CopiedFolder') AND t3.FOLDERNAME = 'Movie Reviews') AND t2.DOCNAME = 'Last Discussion';
119
DOCID	DOCNAME	DOCTYPEID	FOLDERID	AUTHOR	CREATED	TITLE	SUBTITLE	DOCABSTRACT	PUBLISHDATE	EXPIRATIONDATE	LOCKEDBY	STATUS	PARENTDOCID	REPID	MODIFIED	MODIFIER	PUBLISHSTATUS	ORIGINATOR	DOCTYPENAME	CONTENTSIZE	MIMETYPE
120
c373e9f5ad07993f3859444553544200	Last Discussion	c373e9f5ad079174ff17444553544200	c373e9f5ad0796c0eca4444553544200	Goldilocks	2003-06-09 11:21:06	Title: Last Discussion	NULL	Setting new abstract and keeping doc checked out	2003-06-09 10:51:26	2003-06-09 10:51:26	NULL	NULL	NULL	03eea05112b845949f3fd03278b5fe43	2003-06-09 11:21:06	admin	0	NULL	Discussion	NULL	NULL
121
EXPLAIN SELECT t2.*, t4.DOCTYPENAME, t1.CONTENTSIZE,t1.MIMETYPE FROM t2 INNER JOIN t4 ON t2.DOCTYPEID = t4.DOCTYPEID LEFT OUTER JOIN t1 ON t2.DOCID = t1.DOCID WHERE t2.FOLDERID IN(SELECT t3.FOLDERID FROM t3 WHERE t3.PARENTID IN(SELECT t3.FOLDERID FROM t3 WHERE t3.PARENTID IN(SELECT t3.FOLDERID FROM t3 WHERE t3.PARENTID IN(SELECT t3.FOLDERID FROM t3 WHERE t3.PARENTID IN(SELECT t3.FOLDERID FROM t3 WHERE t3.PARENTID='2f6161e879db43c1a5b82c21ddc49089' AND t3.FOLDERNAME = 'Level1') AND t3.FOLDERNAME = 'Level2') AND t3.FOLDERNAME = 'Level3') AND t3.FOLDERNAME = 'CopiedFolder') AND t3.FOLDERNAME = 'Movie Reviews') AND t2.DOCNAME = 'Last Discussion';
122
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
814.1.6 by Jay Pipes
Modified JOIN::flatten_subqueries() to ensure that when a LEFT JOIN
123
1	PRIMARY	t2	ALL	DDOCTYPEID_IDX	NULL	NULL	NULL	9	Using where
642.1.80 by Lee
merge with latest from the trunk
124
1	PRIMARY	t1	eq_ref	PRIMARY	PRIMARY	130	test.t2.DOCID	1	
125
1	PRIMARY	t4	eq_ref	PRIMARY	PRIMARY	130	test.t2.DOCTYPEID	1	
1100.2.1 by Brian Aker
First pass through removing most of the semi_join code.
126
2	SUBQUERY	t3	ALL	NULL	NULL	NULL	NULL	21	Using where
127
3	SUBQUERY	t3	ALL	NULL	NULL	NULL	NULL	21	Using where
128
4	SUBQUERY	t3	ALL	NULL	NULL	NULL	NULL	21	Using where
129
5	SUBQUERY	t3	ALL	NULL	NULL	NULL	NULL	21	Using where
130
6	SUBQUERY	t3	ref	CMFLDRPARNT_IDX	CMFLDRPARNT_IDX	131	const	6	Using where
1 by brian
clean slate
131
drop table t1, t2, t3, t4;
642.1.80 by Lee
merge with latest from the trunk
132
CREATE TABLE t1 (a int, PRIMARY KEY (a)) Engine=InnoDB;
1 by brian
clean slate
133
INSERT INTO t1 VALUES (1),(2);
642.1.80 by Lee
merge with latest from the trunk
134
CREATE TABLE t2 (a int, PRIMARY KEY (a)) Engine=InnoDB;
1 by brian
clean slate
135
INSERT INTO t2 VALUES (1);
642.1.80 by Lee
merge with latest from the trunk
136
CREATE TABLE t3 (a int, b int, c int,
1 by brian
clean slate
137
PRIMARY KEY (a)) Engine=InnoDB;
138
INSERT INTO t3 VALUES (1,2,1);
139
SELECT t1.* FROM t1 WHERE (SELECT COUNT(*) FROM t3,t2 WHERE t3.c=t2.a 
140
and t2.a='1' AND t1.a=t3.b) > 0;
141
a
142
2
143
DROP TABLE t1,t2,t3;