github.com/jdgcs/sqlite3@v1.12.1-0.20210908114423-bc5f96e4dd51/testdata/tcl/whereE.test (about)

     1  # 2012 November 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 implements regression tests for SQLite library.  The
    12  # focus of this file is testing the query planner to make sure it
    13  # is making good planning decisions.
    14  #
    15  
    16  
    17  set testdir [file dirname $argv0]
    18  source $testdir/tester.tcl
    19  set ::testprefix whereE
    20  
    21  do_execsql_test 1.1 {
    22    CREATE TABLE t1(a,b);
    23    INSERT INTO t1 VALUES(1,10), (2,20), (3,30), (2,22), (3, 33);
    24    INSERT INTO t1 SELECT * FROM t1;
    25    INSERT INTO t1 SELECT * FROM t1;
    26    INSERT INTO t1 SELECT * FROM t1;
    27    INSERT INTO t1 SELECT * FROM t1;
    28    INSERT INTO t1 SELECT * FROM t1;
    29    INSERT INTO t1 SELECT * FROM t1;
    30    INSERT INTO t1 SELECT * FROM t1;
    31    INSERT INTO t1 SELECT * FROM t1;
    32    INSERT INTO t1 SELECT * FROM t1;
    33    INSERT INTO t1 SELECT * FROM t1;
    34    ALTER TABLE t1 ADD COLUMN c;
    35    UPDATE t1 SET c=a*rowid+10000;
    36    CREATE INDEX t1ab ON t1(a,b);
    37    
    38    CREATE TABLE t2(x,y);
    39    INSERT INTO t2 VALUES(4,44),(5,55),(6,66),(7,77);
    40    INSERT INTO t2 SELECT x+4, (x+4)*11 FROM t2;
    41    INSERT INTO t2 SELECT x+8, (x+8)*11 FROM t2;
    42    INSERT INTO t2 SELECT x+16, (x+16)*11 FROM t2;
    43    INSERT INTO t2 SELECT x+32, (x+32)*11 FROM t2;
    44    INSERT INTO t2 SELECT x+64, (x+32)*11 FROM t2;
    45    ALTER TABLE t2 ADD COLUMN z;
    46    UPDATE t2 SET z=2;
    47    CREATE UNIQUE INDEX t2zx ON t2(z,x);
    48  
    49    EXPLAIN QUERY PLAN SELECT x FROM t1, t2 WHERE a=z AND c=x;
    50  } {/.*SCAN t1.*SEARCH t2.*/}
    51  do_execsql_test 1.2 {
    52    EXPLAIN QUERY PLAN SELECT x FROM t2, t1 WHERE a=z AND c=x;
    53  } {/.*SCAN t1.*SEARCH t2.*/}
    54  do_execsql_test 1.3 {
    55    ANALYZE;
    56    EXPLAIN QUERY PLAN SELECT x FROM t1, t2 WHERE a=z AND c=x;
    57  } {/.*SCAN t1.*SEARCH t2.*/}
    58  do_execsql_test 1.4 {
    59    EXPLAIN QUERY PLAN SELECT x FROM t2, t1 WHERE a=z AND c=x;
    60  } {/.*SCAN t1.*SEARCH t2.*/}
    61  
    62  finish_test