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sqlite3

    1: # 2008 October 9
    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 generates SQL text used for performance testing.
   12: #
   13: # $Id: mkspeedsql.tcl,v 1.1.1.1 2012/02/21 17:04:17 misho Exp $
   14: #
   15: 
   16: # Set a uniform random seed
   17: expr srand(0)
   18: 
   19: # The number_name procedure below converts its argment (an integer)
   20: # into a string which is the English-language name for that number.
   21: #
   22: # Example:
   23: #
   24: #     puts [number_name 123]   ->  "one hundred twenty three"
   25: #
   26: set ones {zero one two three four five six seven eight nine
   27:           ten eleven twelve thirteen fourteen fifteen sixteen seventeen
   28:           eighteen nineteen}
   29: set tens {{} ten twenty thirty forty fifty sixty seventy eighty ninety}
   30: proc number_name {n} {
   31:   if {$n>=1000} {
   32:     set txt "[number_name [expr {$n/1000}]] thousand"
   33:     set n [expr {$n%1000}]
   34:   } else {
   35:     set txt {}
   36:   }
   37:   if {$n>=100} {
   38:     append txt " [lindex $::ones [expr {$n/100}]] hundred"
   39:     set n [expr {$n%100}]
   40:   }
   41:   if {$n>=20} {
   42:     append txt " [lindex $::tens [expr {$n/10}]]"
   43:     set n [expr {$n%10}]
   44:   }
   45:   if {$n>0} {
   46:     append txt " [lindex $::ones $n]"
   47:   }
   48:   set txt [string trim $txt]
   49:   if {$txt==""} {set txt zero}
   50:   return $txt
   51: }
   52: 
   53: # Create a database schema.
   54: #
   55: puts {
   56:   PRAGMA page_size=1024;
   57:   PRAGMA cache_size=8192;
   58:   PRAGMA locking_mode=EXCLUSIVE;
   59:   CREATE TABLE t1(a INTEGER, b INTEGER, c TEXT);
   60:   CREATE TABLE t2(a INTEGER, b INTEGER, c TEXT);
   61:   CREATE INDEX i2a ON t2(a);
   62:   CREATE INDEX i2b ON t2(b);
   63:   SELECT name FROM sqlite_master ORDER BY 1;
   64: }
   65: 
   66: 
   67: # 50000 INSERTs on an unindexed table
   68: #
   69: set t1c_list {}
   70: puts {BEGIN;}
   71: for {set i 1} {$i<=50000} {incr i} {
   72:   set r [expr {int(rand()*500000)}]
   73:   set x [number_name $r]
   74:   lappend t1c_list $x
   75:   puts "INSERT INTO t1 VALUES($i,$r,'$x');"
   76: }
   77: puts {COMMIT;}
   78: 
   79: # 50000 INSERTs on an indexed table
   80: #
   81: puts {BEGIN;}
   82: for {set i 1} {$i<=50000} {incr i} {
   83:   set r [expr {int(rand()*500000)}]
   84:   puts "INSERT INTO t2 VALUES($i,$r,'[number_name $r]');"
   85: }
   86: puts {COMMIT;}
   87: 
   88: 
   89: # 50 SELECTs on an integer comparison.  There is no index so
   90: # a full table scan is required.
   91: #
   92: for {set i 0} {$i<50} {incr i} {
   93:   set lwr [expr {$i*100}]
   94:   set upr [expr {($i+10)*100}]
   95:   puts "SELECT count(*), avg(b) FROM t1 WHERE b>=$lwr AND b<$upr;"
   96: }
   97: 
   98: # 50 SELECTs on an LIKE comparison.  There is no index so a full
   99: # table scan is required.
  100: #
  101: for {set i 0} {$i<50} {incr i} {
  102:   puts "SELECT count(*), avg(b) FROM t1 WHERE c LIKE '%[number_name $i]%';"
  103: }
  104: 
  105: # Create indices
  106: #
  107: puts {BEGIN;}
  108: puts {
  109:   CREATE INDEX i1a ON t1(a);
  110:   CREATE INDEX i1b ON t1(b);
  111:   CREATE INDEX i1c ON t1(c);
  112: }
  113: puts {COMMIT;}
  114: 
  115: # 5000 SELECTs on an integer comparison where the integer is
  116: # indexed.
  117: #
  118: set sql {}
  119: for {set i 0} {$i<5000} {incr i} {
  120:   set lwr [expr {$i*100}]
  121:   set upr [expr {($i+10)*100}]
  122:   puts "SELECT count(*), avg(b) FROM t1 WHERE b>=$lwr AND b<$upr;"
  123: }
  124: 
  125: # 100000 random SELECTs against rowid.
  126: #
  127: for {set i 1} {$i<=100000} {incr i} {
  128:   set id [expr {int(rand()*50000)+1}]
  129:   puts "SELECT c FROM t1 WHERE rowid=$id;"
  130: }
  131: 
  132: # 100000 random SELECTs against a unique indexed column.
  133: #
  134: for {set i 1} {$i<=100000} {incr i} {
  135:   set id [expr {int(rand()*50000)+1}]
  136:   puts "SELECT c FROM t1 WHERE a=$id;"
  137: }
  138: 
  139: # 50000 random SELECTs against an indexed column text column
  140: #
  141: set nt1c [llength $t1c_list]
  142: for {set i 0} {$i<50000} {incr i} {
  143:   set r [expr {int(rand()*$nt1c)}]
  144:   set c [lindex $t1c_list $i]
  145:   puts "SELECT c FROM t1 WHERE c='$c';"
  146: }
  147: 
  148: 
  149: # Vacuum
  150: puts {VACUUM;}
  151: 
  152: # 5000 updates of ranges where the field being compared is indexed.
  153: #
  154: puts {BEGIN;}
  155: for {set i 0} {$i<5000} {incr i} {
  156:   set lwr [expr {$i*2}]
  157:   set upr [expr {($i+1)*2}]
  158:   puts "UPDATE t1 SET b=b*2 WHERE a>=$lwr AND a<$upr;"
  159: }
  160: puts {COMMIT;}
  161: 
  162: # 50000 single-row updates.  An index is used to find the row quickly.
  163: #
  164: puts {BEGIN;}
  165: for {set i 0} {$i<50000} {incr i} {
  166:   set r [expr {int(rand()*500000)}]
  167:   puts "UPDATE t1 SET b=$r WHERE a=$i;"
  168: }
  169: puts {COMMIT;}
  170: 
  171: # 1 big text update that touches every row in the table.
  172: #
  173: puts {
  174:   UPDATE t1 SET c=a;
  175: }
  176: 
  177: # Many individual text updates.  Each row in the table is
  178: # touched through an index.
  179: #
  180: puts {BEGIN;}
  181: for {set i 1} {$i<=50000} {incr i} {
  182:   set r [expr {int(rand()*500000)}]
  183:   puts "UPDATE t1 SET c='[number_name $r]' WHERE a=$i;"
  184: }
  185: puts {COMMIT;}
  186: 
  187: # Delete all content in a table.
  188: #
  189: puts {DELETE FROM t1;}
  190: 
  191: # Copy one table into another
  192: #
  193: puts {INSERT INTO t1 SELECT * FROM t2;}
  194: 
  195: # Delete all content in a table, one row at a time.
  196: #
  197: puts {DELETE FROM t1 WHERE 1;}
  198: 
  199: # Refill the table yet again
  200: #
  201: puts {INSERT INTO t1 SELECT * FROM t2;}
  202: 
  203: # Drop the table and recreate it without its indices.
  204: #
  205: puts {BEGIN;}
  206: puts {
  207:    DROP TABLE t1;
  208:    CREATE TABLE t1(a INTEGER, b INTEGER, c TEXT);
  209: }
  210: puts {COMMIT;}
  211: 
  212: # Refill the table yet again.  This copy should be faster because
  213: # there are no indices to deal with.
  214: #
  215: puts {INSERT INTO t1 SELECT * FROM t2;}
  216: 
  217: # Select 20000 rows from the table at random.
  218: #
  219: puts {
  220:   SELECT rowid FROM t1 ORDER BY random() LIMIT 20000;
  221: }
  222: 
  223: # Delete 20000 random rows from the table.
  224: #
  225: puts {
  226:   DELETE FROM t1 WHERE rowid IN
  227:     (SELECT rowid FROM t1 ORDER BY random() LIMIT 20000);
  228: }
  229: puts {SELECT count(*) FROM t1;}
  230:     
  231: # Delete 20000 more rows at random from the table.
  232: #
  233: puts {
  234:   DELETE FROM t1 WHERE rowid IN
  235:     (SELECT rowid FROM t1 ORDER BY random() LIMIT 20000);
  236: }
  237: puts {SELECT count(*) FROM t1;}