gitlab.com/CoiaPrant/sqlite3@v1.19.1/testdata/tcl/delete3.test (about)

     1  # 2005 August 24
     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.  The
    12  # focus of this script is a test of the DELETE command where a
    13  # large number of rows are deleted.
    14  #
    15  
    16  set testdir [file dirname $argv0]
    17  source $testdir/tester.tcl
    18  
    19  # Create a table that contains a large number of rows.
    20  #
    21  do_test delete3-1.1 {
    22    execsql {
    23      CREATE TABLE t1(x integer primary key);
    24      BEGIN;
    25      INSERT INTO t1 VALUES(1);
    26      INSERT INTO t1 VALUES(2);
    27      INSERT INTO t1 SELECT x+2 FROM t1;
    28      INSERT INTO t1 SELECT x+4 FROM t1;
    29      INSERT INTO t1 SELECT x+8 FROM t1;
    30      INSERT INTO t1 SELECT x+16 FROM t1;
    31      INSERT INTO t1 SELECT x+32 FROM t1;
    32      INSERT INTO t1 SELECT x+64 FROM t1;
    33      INSERT INTO t1 SELECT x+128 FROM t1;
    34      INSERT INTO t1 SELECT x+256 FROM t1;
    35      INSERT INTO t1 SELECT x+512 FROM t1;
    36      INSERT INTO t1 SELECT x+1024 FROM t1;
    37      INSERT INTO t1 SELECT x+2048 FROM t1;
    38      INSERT INTO t1 SELECT x+4096 FROM t1;
    39      INSERT INTO t1 SELECT x+8192 FROM t1;
    40      INSERT INTO t1 SELECT x+16384 FROM t1;
    41      INSERT INTO t1 SELECT x+32768 FROM t1;
    42      INSERT INTO t1 SELECT x+65536 FROM t1;
    43      INSERT INTO t1 SELECT x+131072 FROM t1;
    44      INSERT INTO t1 SELECT x+262144 FROM t1;
    45      COMMIT;
    46      SELECT count(*) FROM t1;	
    47    }
    48  } {524288}
    49  do_test delete3-1.2 {
    50    execsql {
    51      DELETE FROM t1 WHERE x%2==0;
    52      SELECT count(*) FROM t1;
    53    }
    54  } {262144}
    55  integrity_check delete3-1.3
    56  
    57  finish_test