gitlab.com/CoiaPrant/sqlite3@v1.19.1/testdata/tcl/join3.test (about)

     1  # 2002 May 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.
    12  #
    13  # This file implements tests for joins, including outer joins, where
    14  # there are a large number of tables involved in the join.
    15  #
    16  # $Id: join3.test,v 1.4 2005/01/19 23:24:51 drh Exp $
    17  
    18  set testdir [file dirname $argv0]
    19  source $testdir/tester.tcl
    20  
    21  # An unrestricted join
    22  #
    23  catch {unset ::result}
    24  set result {}
    25  for {set N 1} {$N<=$bitmask_size} {incr N} {
    26    lappend result $N
    27    do_test join3-1.$N {
    28      execsql "CREATE TABLE t${N}(x);"
    29      execsql "INSERT INTO t$N VALUES($N)"
    30      set sql "SELECT * FROM t1"
    31      for {set i 2} {$i<=$N} {incr i} {append sql ", t$i"}
    32      execsql $sql
    33    } $result
    34  }
    35  
    36  # Joins with a comparison
    37  #
    38  set result {}
    39  for {set N 1} {$N<=$bitmask_size} {incr N} {
    40    lappend result $N
    41    do_test join3-2.$N {
    42      set sql "SELECT * FROM t1"
    43      for {set i 2} {$i<=$N} {incr i} {append sql ", t$i"}
    44      set sep WHERE
    45      for {set i 1} {$i<$N} {incr i} {
    46        append sql " $sep t[expr {$i+1}].x==t$i.x+1"
    47        set sep AND
    48      }
    49      execsql $sql
    50    } $result
    51  }
    52  
    53  # Error of too many tables in the join
    54  #
    55  do_test join3-3.1 {
    56    set sql "SELECT * FROM t1 AS t0, t1"
    57    for {set i 2} {$i<=$bitmask_size} {incr i} {append sql ", t$i"}
    58    catchsql $sql
    59  } [list 1 "at most $bitmask_size tables in a join"]
    60  
    61  
    62  finish_test