SQLite

#    May you share freely, never taking more than you give.
#
#***********************************************************************
# This file implements regression tests for SQLite library.
# The focus of the tests in this file are to verify that the
# pager optimizations implemented in version 3.3.14 work.
#
# $Id: pageropt.test,v 1.2 2007/04/13 03:23:21 drh Exp $

set testdir [file dirname $argv0]
source $testdir/tester.tcl

ifcapable {!pager_pragmas} {
  finish_test
  return

  }
} {3 4 3 0}
do_test pageropt-2.3 {
  pagercount_sql {
    INSERT INTO t1 VALUES(randomblob(1500));
  }
} {0 4 3 0}

# Note the new optimization that when pulling the very last page off of the
# freelist we do not read the content of that page.
#
do_test pageropt-2.4 {
  pagercount_sql {
    INSERT INTO t1 VALUES(randomblob(1500));
  }
} {0 5 3 0}

# Appending a large quantity of data does not involve writing much
# to the journal file.
#
do_test pageropt-3.1 {
  pagercount_sql {
    INSERT INTO t2 SELECT * FROM t1;
  }
} {1 7 2 0}

# Once again, we do not need to read the last page of an overflow chain
# while deleting.
#
do_test pageropt-3.2 {
  pagercount_sql {
    DROP TABLE t2;
  }
} {0 2 3 0}
do_test pageropt-3.3 {
  pagercount_sql {
    DELETE FROM t1;
  }
} {0 3 3 0}

# There are now 11 pages on the freelist.  Move them all into an
# overflow chain by inserting a single large record.  Starting from
# a cold cache, only page 1, the root page of table t1, and the trunk
# of the freelist need to be read (3 pages).  And only those three
# pages need to be journalled.  But 13 pages need to be written:
# page1, the root page of table t1, and an 11 page overflow chain.
#
do_test pageropt-4.1 {
  db close
  sqlite3 db test.db
  pagercount_sql {
    INSERT INTO t1 VALUES(randomblob(11300))
  }
} {3 13 3 0}

# Now we delete that big entries starting from a cold cache and an
# empty freelist.  The first 10 of the 11 pages overflow chain have
# to be read, together with page1 and the root of the t1 table.  12
# reads total.  But only page1, the t1 root, and the trunk of the
# freelist need to be journalled and written back.
#
do_test pageroot-4.2 {
  db close
  sqlite3 db test.db
  pagercount_sql {
    DELETE FROM t1
  }
} {12 3 3 0}


catch {db2 close}
finish_test

# 2001 September 15
#
# 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 some common TCL routines used for regression
# testing the SQLite library
#
# $Id: tester.tcl,v 1.78 2007/04/13 03:23:21 drh Exp $

# Make sure tclsqlite3 was compiled correctly.  Abort now with an
# error message if not.
#
if {[sqlite3 -tcl-uses-utf]} {
  if {"\u1234"=="u1234"} {
    puts stderr "***** BUILD PROBLEM *****"

    puts "\nExpected: \[$expected\]\n     Got: \[$result\]"
    incr nErr
    lappend ::failList $name
    if {$nErr>=$maxErr} {puts "*** Giving up..."; finalize_testing}
  } else {
    puts " Ok"
  }
  flush stdout
}

# Run an SQL script.  
# Return the number of microseconds per statement.
#
proc speed_trial {name numstmt units sql} {
  puts -nonewline [format {%-21.21s } $name...]