modernc.org/cc@v1.0.1/v2/testdata/_sqlite/test/sort5.test (about)

     1  # 2014 September 15.
     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 implements regression tests for SQLite library. 
    12  #
    13  
    14  set testdir [file dirname $argv0]
    15  source $testdir/tester.tcl
    16  set testprefix sort5
    17  
    18  
    19  #-------------------------------------------------------------------------
    20  # Verify that sorting works with a version 1 sqlite3_io_methods structure.
    21  #
    22  testvfs tvfs -iversion 1 -default true
    23  reset_db
    24  do_execsql_test 1.0 {
    25    PRAGMA mmap_size = 10000000;
    26    PRAGMA cache_size = 10;
    27    CREATE TABLE t1(a, b);
    28  } {0}
    29  
    30  do_test 1.1 {
    31    execsql BEGIN
    32    for {set i 0} {$i < 2000} {incr i} {
    33      execsql { INSERT INTO t1 VALUES($i, randomblob(2000)) }
    34    }
    35    execsql COMMIT
    36  } {}
    37  
    38  do_execsql_test 1.2 {
    39    CREATE INDEX i1 ON t1(b);
    40  }
    41  
    42  db close
    43  tvfs delete
    44  
    45  #-------------------------------------------------------------------------
    46  # Test that the PMA size is determined correctly. The PMA size should be
    47  # roughly the same amount of memory allocated to the main pager cache, or
    48  # 250 pages if this is larger.
    49  #
    50  testvfs tvfs
    51  tvfs script tv_callback
    52  tvfs filter {xOpen xWrite}
    53  
    54  proc tv_callback {method args} {
    55    global iTemp
    56    global F
    57    switch $method {
    58      xOpen {
    59        if {[lindex $args 0]==""} { return "temp[incr iTemp]" }
    60        return "SQLITE_OK"
    61      }
    62  
    63      xWrite {
    64        foreach {filename id off amt} $args {}
    65        if {[info exists F($id)]==0 || $F($id)<($off + $amt)} {
    66          set F($id) [expr $off+$amt]
    67        }
    68      }
    69    }
    70  }
    71  
    72  catch { db close }
    73  forcedelete test.db
    74  sqlite3 db test.db -vfs tvfs
    75  execsql { CREATE TABLE t1(x) }
    76  
    77  # Each iteration of the following loop attempts to sort 10001 records
    78  # each a bit over 100 bytes in size. In total a little more than 1MiB 
    79  # of data.
    80  #
    81  foreach {tn pgsz cachesz bTemp} {
    82    1 4096   1000  0
    83    2 1024   1000  1
    84  
    85    3 4096  -1000  1
    86    4 1024  -1000  1
    87  
    88    5 4096  -9000  0
    89    6 1024  -9000  0
    90  } {
    91    do_execsql_test 2.$tn.0 "
    92      PRAGMA page_size = $pgsz;
    93      VACUUM;
    94      PRAGMA cache_size = $cachesz;
    95    "
    96  
    97    if {[db one {PRAGMA page_size}]!=$pgsz} {
    98      # SEE is not able to change page sizes and that messes up the
    99      # results that follow.
   100      continue
   101    }
   102  
   103    do_test 2.$tn.1 {
   104      set ::iTemp 0
   105      catch { array unset F }
   106      execsql {
   107        WITH x(i, j) AS (
   108          SELECT 1, randomblob(100)
   109          UNION ALL
   110          SELECT i+1, randomblob(100) FROM x WHERE i<10000
   111        )
   112        SELECT * FROM x ORDER BY j;
   113      }
   114      expr {[array names F]!=""}
   115    } $bTemp
   116  }
   117  
   118  finish_test