SQLite

Check-in [2d427746d5]
Login

Many hyperlinks are disabled.
Use anonymous login to enable hyperlinks.

Overview
Comment:New speed testing tools. (CVS 5786)
Downloads: Tarball | ZIP archive
Timelines: family | ancestors | descendants | both | trunk
Files: files | file ages | folders
SHA1: 2d427746d53104ca032c404f7f65c51b41b7a20e
User & Date: drh 2008-10-09 17:57:34.000
Context
2008-10-09
18:48
Fix an assert() failure that can occur if the user attempts to set an into an integer primary key column to a text value in a table that has a BEFORE UPDATE trigger. (CVS 5787) (check-in: c2cf9d60d6 user: danielk1977 tags: trunk)
17:57
New speed testing tools. (CVS 5786) (check-in: 2d427746d5 user: drh tags: trunk)
15:56
Add a test to verify the sqlite3_column_name() interface returns the correct value when the query is of the form: "SELECT rowid,* FROM...". Ticket #3429. (CVS 5785) (check-in: e90d5a5515 user: drh tags: trunk)
Changes
Unified Diff Ignore Whitespace Patch
Added tool/mkspeedsql.tcl.


























































































































































































































































































































































































































































































>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
# 2008 October 9
#
# 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 generates SQL text used for performance testing.
#
# $Id: mkspeedsql.tcl,v 1.1 2008/10/09 17:57:34 drh Exp $
#

# Set a uniform random seed
expr srand(0)

# The number_name procedure below converts its argment (an integer)
# into a string which is the English-language name for that number.
#
# Example:
#
#     puts [number_name 123]   ->  "one hundred twenty three"
#
set ones {zero one two three four five six seven eight nine
          ten eleven twelve thirteen fourteen fifteen sixteen seventeen
          eighteen nineteen}
set tens {{} ten twenty thirty forty fifty sixty seventy eighty ninety}
proc number_name {n} {
  if {$n>=1000} {
    set txt "[number_name [expr {$n/1000}]] thousand"
    set n [expr {$n%1000}]
  } else {
    set txt {}
  }
  if {$n>=100} {
    append txt " [lindex $::ones [expr {$n/100}]] hundred"
    set n [expr {$n%100}]
  }
  if {$n>=20} {
    append txt " [lindex $::tens [expr {$n/10}]]"
    set n [expr {$n%10}]
  }
  if {$n>0} {
    append txt " [lindex $::ones $n]"
  }
  set txt [string trim $txt]
  if {$txt==""} {set txt zero}
  return $txt
}

# Create a database schema.
#
puts {
  PRAGMA page_size=1024;
  PRAGMA cache_size=8192;
  PRAGMA locking_mode=EXCLUSIVE;
  CREATE TABLE t1(a INTEGER, b INTEGER, c TEXT);
  CREATE TABLE t2(a INTEGER, b INTEGER, c TEXT);
  CREATE INDEX i2a ON t2(a);
  CREATE INDEX i2b ON t2(b);
  SELECT name FROM sqlite_master ORDER BY 1;
}


# 50000 INSERTs on an unindexed table
#
set t1c_list {}
puts {BEGIN;}
for {set i 1} {$i<=50000} {incr i} {
  set r [expr {int(rand()*500000)}]
  set x [number_name $r]
  lappend t1c_list $x
  puts "INSERT INTO t1 VALUES($i,$r,'$x');"
}
puts {COMMIT;}

# 50000 INSERTs on an indexed table
#
puts {BEGIN;}
for {set i 1} {$i<=50000} {incr i} {
  set r [expr {int(rand()*500000)}]
  puts "INSERT INTO t2 VALUES($i,$r,'[number_name $r]');"
}
puts {COMMIT;}


# 50 SELECTs on an integer comparison.  There is no index so
# a full table scan is required.
#
for {set i 0} {$i<50} {incr i} {
  set lwr [expr {$i*100}]
  set upr [expr {($i+10)*100}]
  puts "SELECT count(*), avg(b) FROM t1 WHERE b>=$lwr AND b<$upr;"
}

# 50 SELECTs on an LIKE comparison.  There is no index so a full
# table scan is required.
#
for {set i 0} {$i<50} {incr i} {
  puts "SELECT count(*), avg(b) FROM t1 WHERE c LIKE '%[number_name $i]%';"
}

# Create indices
#
puts {BEGIN;}
puts {
  CREATE INDEX i1a ON t1(a);
  CREATE INDEX i1b ON t1(b);
  CREATE INDEX i1c ON t1(c);
}
puts {COMMIT;}

# 5000 SELECTs on an integer comparison where the integer is
# indexed.
#
set sql {}
for {set i 0} {$i<5000} {incr i} {
  set lwr [expr {$i*100}]
  set upr [expr {($i+10)*100}]
  puts "SELECT count(*), avg(b) FROM t1 WHERE b>=$lwr AND b<$upr;"
}

# 100000 random SELECTs against rowid.
#
for {set i 1} {$i<=100000} {incr i} {
  set id [expr {int(rand()*50000)+1}]
  puts "SELECT c FROM t1 WHERE rowid=$id;"
}

# 100000 random SELECTs against a unique indexed column.
#
for {set i 1} {$i<=100000} {incr i} {
  set id [expr {int(rand()*50000)+1}]
  puts "SELECT c FROM t1 WHERE a=$id;"
}

# 50000 random SELECTs against an indexed column text column
#
set nt1c [llength $t1c_list]
for {set i 0} {$i<50000} {incr i} {
  set r [expr {int(rand()*$nt1c)}]
  set c [lindex $t1c_list $i]
  puts "SELECT c FROM t1 WHERE c='$c';"
}


# Vacuum
puts {VACUUM;}

# 5000 updates of ranges where the field being compared is indexed.
#
puts {BEGIN;}
for {set i 0} {$i<5000} {incr i} {
  set lwr [expr {$i*2}]
  set upr [expr {($i+1)*2}]
  puts "UPDATE t1 SET b=b*2 WHERE a>=$lwr AND a<$upr;"
}
puts {COMMIT;}

# 50000 single-row updates.  An index is used to find the row quickly.
#
puts {BEGIN;}
for {set i 0} {$i<50000} {incr i} {
  set r [expr {int(rand()*500000)}]
  puts "UPDATE t1 SET b=$r WHERE a=$i;"
}
puts {COMMIT;}

# 1 big text update that touches every row in the table.
#
puts {
  UPDATE t1 SET c=a;
}

# Many individual text updates.  Each row in the table is
# touched through an index.
#
puts {BEGIN;}
for {set i 1} {$i<=50000} {incr i} {
  set r [expr {int(rand()*500000)}]
  puts "UPDATE t1 SET c='[number_name $r]' WHERE a=$i;"
}
puts {COMMIT;}

# Delete all content in a table.
#
puts {DELETE FROM t1;}

# Copy one table into another
#
puts {INSERT INTO t1 SELECT * FROM t2;}

# Delete all content in a table, one row at a time.
#
puts {DELETE FROM t1 WHERE 1;}

# Refill the table yet again
#
puts {INSERT INTO t1 SELECT * FROM t2;}

# Drop the table and recreate it without its indices.
#
puts {BEGIN;}
puts {
   DROP TABLE t1;
   CREATE TABLE t1(a INTEGER, b INTEGER, c TEXT);
}
puts {COMMIT;}

# Refill the table yet again.  This copy should be faster because
# there are no indices to deal with.
#
puts {INSERT INTO t1 SELECT * FROM t2;}

# Select 20000 rows from the table at random.
#
puts {
  SELECT rowid FROM t1 ORDER BY random() LIMIT 20000;
}

# Delete 20000 random rows from the table.
#
puts {
  DELETE FROM t1 WHERE rowid IN
    (SELECT rowid FROM t1 ORDER BY random() LIMIT 20000);
}
puts {SELECT count(*) FROM t1;}
    
# Delete 20000 more rows at random from the table.
#
puts {
  DELETE FROM t1 WHERE rowid IN
    (SELECT rowid FROM t1 ORDER BY random() LIMIT 20000);
}
puts {SELECT count(*) FROM t1;}
Changes to tool/speedtest8.c.
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
    finalizeTime += iElapse;
    if (!bQuiet){
      printf("sqlite3_finalize() returns %d in %llu cycles\n", rc, iElapse);
    }
  }
}

/***************************************************************************
** The "overwrite" VFS is an overlay over the default VFS.  It modifies
** the xTruncate operation on journal files so that xTruncate merely
** writes zeros into the first 50 bytes of the file rather than truely
** truncating the file.
**
** The following variables are initialized to be the virtual function
** tables for the overwrite VFS.
*/
static sqlite3_vfs overwrite_vfs;
static sqlite3_io_methods overwrite_methods;

/*
** The truncate method for journal files in the overwrite VFS.
*/
static int overwriteTruncate(sqlite3_file *pFile, sqlite_int64 size){
  int rc;
  static const char buf[50];
  if( size ){
    return SQLITE_IOERR;
  }
  rc = pFile->pMethods->xWrite(pFile, buf, sizeof(buf), 0);
  if( rc==SQLITE_OK ){
    rc = pFile->pMethods->xSync(pFile, SQLITE_SYNC_NORMAL);
  }
  return rc;
}

/*
** The delete method for journal files in the overwrite VFS.
*/
static int overwriteDelete(sqlite3_file *pFile){
  return overwriteTruncate(pFile, 0);
}

/*
** The open method for overwrite VFS.  If the file being opened is
** a journal file then substitute the alternative xTruncate method.
*/
static int overwriteOpen(
  sqlite3_vfs *pVfs,
  const char *zName,
  sqlite3_file *pFile,
  int flags,
  int *pOutFlags
){
  int rc;
  sqlite3_vfs *pRealVfs;
  int isJournal;

  isJournal = (flags & (SQLITE_OPEN_MAIN_JOURNAL|SQLITE_OPEN_TEMP_JOURNAL))!=0;
  pRealVfs = (sqlite3_vfs*)pVfs->pAppData;
  rc = pRealVfs->xOpen(pRealVfs, zName, pFile, flags, pOutFlags);
  if( rc==SQLITE_OK && isJournal ){
    if( overwrite_methods.xTruncate==0 ){
      sqlite3_io_methods temp;
      memcpy(&temp, pFile->pMethods, sizeof(temp));
      temp.xTruncate = overwriteTruncate;
      memcpy(&overwrite_methods, &temp, sizeof(temp));
    }
    pFile->pMethods = &overwrite_methods;
  }
  return rc;
}

/*
** Overlay the overwrite VFS over top of the current default VFS
** and make the overlay VFS the new default.
**
** This routine can only be evaluated once.  On second and subsequent
** executions it becomes a no-op.
*/
static void registerOverwriteVfs(void){
  sqlite3_vfs *pBase;
  if( overwrite_vfs.iVersion ) return;
  pBase = sqlite3_vfs_find(0);
  memcpy(&overwrite_vfs, pBase, sizeof(overwrite_vfs));
  overwrite_vfs.pAppData = pBase;
  overwrite_vfs.xOpen = overwriteOpen;
  overwrite_vfs.zName = "overwriteVfs";
  sqlite3_vfs_register(&overwrite_vfs, 1);
}

int main(int argc, char **argv){
  sqlite3 *db;
  int rc;
  int nSql;
  char *zSql;
  int i, j;
  FILE *in;







<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<
<







86
87
88
89
90
91
92



















































































93
94
95
96
97
98
99
    finalizeTime += iElapse;
    if (!bQuiet){
      printf("sqlite3_finalize() returns %d in %llu cycles\n", rc, iElapse);
    }
  }
}




















































































int main(int argc, char **argv){
  sqlite3 *db;
  int rc;
  int nSql;
  char *zSql;
  int i, j;
  FILE *in;
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
  extern sqlite3_vfs *sqlite3_instvfs_binarylog(char *, char *, char *);
  extern void sqlite3_instvfs_destroy(sqlite3_vfs *);
  sqlite3_vfs *pVfs = 0;
#endif

  while (argc>3)
  {
    if( argc>3 && strcmp(argv[1], "-overwrite")==0 ){
     registerOverwriteVfs();
     argv++;
     argc--;
     continue;
    }

#ifdef HAVE_OSINST
    if( argc>4 && (strcmp(argv[1], "-log")==0) ){
     pVfs = sqlite3_instvfs_binarylog("oslog", 0, argv[2]);
     sqlite3_vfs_register(pVfs, 1);
     argv += 2;
     argc -= 2;
     continue;







<
<
<
<
<
<
<







112
113
114
115
116
117
118







119
120
121
122
123
124
125
  extern sqlite3_vfs *sqlite3_instvfs_binarylog(char *, char *, char *);
  extern void sqlite3_instvfs_destroy(sqlite3_vfs *);
  sqlite3_vfs *pVfs = 0;
#endif

  while (argc>3)
  {







#ifdef HAVE_OSINST
    if( argc>4 && (strcmp(argv[1], "-log")==0) ){
     pVfs = sqlite3_instvfs_binarylog("oslog", 0, argv[2]);
     sqlite3_vfs_register(pVfs, 1);
     argv += 2;
     argc -= 2;
     continue;
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
    break;
  }

  if( argc!=3 ){
   fprintf(stderr, "Usage: %s [options] FILENAME SQL-SCRIPT\n"
              "Runs SQL-SCRIPT against a UTF8 database\n"
              "\toptions:\n"
              "\t-overwrite\n"
#ifdef HAVE_OSINST
              "\t-log <log>\n"
#endif
              "\t-priority <value> : set priority of task\n"
              "\t-quiet : only display summary results\n",
              zArgv0);
   exit(1);







<







170
171
172
173
174
175
176

177
178
179
180
181
182
183
    break;
  }

  if( argc!=3 ){
   fprintf(stderr, "Usage: %s [options] FILENAME SQL-SCRIPT\n"
              "Runs SQL-SCRIPT against a UTF8 database\n"
              "\toptions:\n"

#ifdef HAVE_OSINST
              "\t-log <log>\n"
#endif
              "\t-priority <value> : set priority of task\n"
              "\t-quiet : only display summary results\n",
              zArgv0);
   exit(1);