[sqlite] Remove obsolete reference version 3.8.7.4.

third_party/sqlite/sqlite-src-3080704/test/sort4.test

-# 2014 May 6.
-#
-# 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 tests in this file are brute force tests of the multi-threaded
-# sorter.
-#
-
-set testdir [file dirname $argv0]
-source $testdir/tester.tcl
-set testprefix sort4
-
-# Configure the sorter to use 3 background threads.
-db eval {PRAGMA threads=3}
-
-# Minimum number of seconds to run for. If the value is 0, each test
-# is run exactly once. Otherwise, tests are repeated until the timeout
-# expires.
-set SORT4TIMEOUT 0
-if {[permutation] == "multithread"} { set SORT4TIMEOUT 300 }
-
-#--------------------------------------------------------------------
-# Set up a table "t1" containing $nRow rows. Each row contains also
-# contains blob fields that collectively contain at least $nPayload 
-# bytes of content. The table schema is as follows:
-#
-#   CREATE TABLE t1(a INTEGER, <extra-columns>, b INTEGER);
-#
-# For each row, the values of columns "a" and "b" are set to the same
-# pseudo-randomly selected integer. The "extra-columns", of which there
-# are at most eight, are named c0, c1, c2 etc. Column c0 contains a 4
-# byte string. Column c1 an 8 byte string. Field c2 16 bytes, and so on.
-#
-# This table is intended to be used for testing queries of the form: 
-#
-#   SELECT a, <cols>, b FROM t1 ORDER BY a;
-#
-# The test code checks that rows are returned in order, and that the 
-# values of "a" and "b" are the same for each row (the idea being that
-# if field "b" at the end of the sorter record has not been corrupted, 
-# the rest of the record is probably Ok as well).
-#
-proc populate_table {nRow nPayload} {
-  set nCol 0
-
-  set n 0
-  for {set nCol 0} {$n < $nPayload} {incr nCol} {
-    incr n [expr (4 << $nCol)]
-  }
-
-  set cols [lrange [list xxx c0 c1 c2 c3 c4 c5 c6 c7] 1 $nCol]
-  set data [lrange [list xxx \
-      randomblob(4) randomblob(8) randomblob(16) randomblob(32) \
-      randomblob(64) randomblob(128) randomblob(256) randomblob(512) \
-  ] 1 $nCol]
-
-  execsql { DROP TABLE IF EXISTS t1 }
-
-  db transaction {
-    execsql "CREATE TABLE t1(a, [join $cols ,], b);"
-    set insert "INSERT INTO t1 VALUES(:k, [join $data ,], :k)"
-    for {set i 0} {$i < $nRow} {incr i} {
-      set k [expr int(rand()*1000000000)]
-      execsql $insert
-    }
-  }
-}
-
-# Helper for [do_sorter_test]
-#
-proc sorter_test {nRow nRead nPayload} {
-  set res [list]
-
-  set nLoad [expr ($nRow > $nRead) ? $nRead : $nRow]
-
-  set nPayload [expr (($nPayload+3)/4) * 4]
-  set cols [list]
-  foreach {mask col} { 
-    0x04  c0 0x08  c1 0x10  c2 0x20  c3 
-    0x40  c4 0x80  c5 0x100 c6 0x200 c7 
-  } {
-    if {$nPayload & $mask} { lappend cols $col }
-  }
-
-  # Create two SELECT statements. Statement $sql1 uses the sorter to sort
-  # $nRow records of a bit over $nPayload bytes each read from the "t1"
-  # table created by [populate_table] proc above. Rows are sorted in order
-  # of the integer field in each "t1" record.
-  #
-  # The second SQL statement sorts the same set of rows as the first, but
-  # uses a LIMIT clause, causing SQLite to use a temp table instead of the
-  # sorter for sorting.
-  #
-  set sql1 "SELECT a, [join $cols ,], b FROM t1 WHERE rowid<=$nRow ORDER BY a"
-  set sql2 "SELECT a FROM t1 WHERE rowid<=$nRow ORDER BY a LIMIT $nRead"
-
-  # Pass the two SQL statements to a helper command written in C. This
-  # command steps statement $sql1 $nRead times and compares the integer
-  # values in the rows returned with the results of executing $sql2. If
-  # the comparison fails (indicating some bug in the sorter), a Tcl
-  # exception is thrown.
-  #
-  sorter_test_sort4_helper db $sql1 $nRead $sql2
-  set {} {} 
-}
-
-# Usage:
-#
-#   do_sorter_test <testname> <args>...
-#
-# where <args> are any of the following switches:
-#
-#   -rows N          (number of rows to have sorter sort)
-#   -read N          (number of rows to read out of sorter)
-#   -payload N       (bytes of payload to read with each row)
-#   -cachesize N     (Value for "PRAGMA cache_size = ?")
-#   -repeats N       (number of times to repeat test)
-#   -fakeheap BOOL   (true to use separate allocations for in-memory records)
-#
-proc do_sorter_test {tn args} {
-  set a(-rows)      1000
-  set a(-repeats)   1
-  set a(-read)      100
-  set a(-payload)   100
-  set a(-cachesize) 100
-  set a(-fakeheap)  0
-
-  foreach {s val} $args {
-    if {[info exists a($s)]==0} { 
-      unset a(-cachesize)
-      set optlist "[join [array names a] ,] or -cachesize"
-      error "Unknown option $s, expected $optlist"
-    }
-    set a($s) $val
-  }
-  if {[permutation] == "memsys3" || [permutation] == "memsys5"} {
-    set a(-fakeheap) 0
-  }
-  if {$a(-fakeheap)} { sorter_test_fakeheap 1 }
-
-
-  db eval "PRAGMA cache_size = $a(-cachesize)"
-  do_test $tn [subst -nocommands {
-    for {set i 0} {[set i] < $a(-repeats)} {incr i} {
-      sorter_test $a(-rows) $a(-read) $a(-payload)
-    }
-  }] {}
-
-  if {$a(-fakeheap)} { sorter_test_fakeheap 0 }
-}
-
-proc clock_seconds {} {
-  db one {SELECT strftime('%s')}
-}
-
-#-------------------------------------------------------------------------
-# Begin tests here.
-
-# Create a test database.
-do_test 1 {
-  execsql "PRAGMA page_size = 4096"
-  populate_table 100000 500
-} {}
-
-set iTimeLimit [expr [clock_seconds] + $SORT4TIMEOUT]
-
-for {set t 2} {1} {incr tn} {
-  do_sorter_test $t.2 -repeats 10 -rows 1000   -read 100
-  do_sorter_test $t.3 -repeats 10 -rows 100000 -read 1000
-  do_sorter_test $t.4 -repeats 10 -rows 100000 -read 1000 -payload 500
-  do_sorter_test $t.5 -repeats 10 -rows 100000 -read 100000 -payload 8
-  do_sorter_test $t.6 -repeats 10 -rows 100000 -read 10 -payload 8
-  do_sorter_test $t.7 -repeats 10 -rows 10000 -read 10000 -payload 8 -fakeheap 1
-  do_sorter_test $t.8 -repeats 10 -rows 100000 -read 10000 -cachesize 250
-
-  set iNow [clock_seconds]
-  if {$iNow>=$iTimeLimit} break
-  do_test "$testprefix-([expr $iTimeLimit-$iNow] seconds remain)" {} {}
-}
-
-finish_test