3 # The author disclaims copyright to this source code. In place of
4 # a legal notice, here is a blessing:
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.
10 #***********************************************************************
11 # Test the virtual table interface. In particular the xBestIndex
15 set testdir [file dirname $argv0]
16 source $testdir/tester.tcl
17 set testprefix bestindex4
24 #-------------------------------------------------------------------------
25 # Virtual table callback for a virtual table named $tbl.
27 # The table created is:
29 # "CREATE TABLE t1 (id, host, class)"
31 # The virtual table supports == operators on a subset of its columns. The
32 # exact subset depends on the value of bitmask paramater $param.
34 # 0x01 - == on "id" supported
35 # 0x02 - == on "host" supported
36 # 0x04 - == on "class" supported
38 # $param also supports the following bits:
40 # 0x08 - ignore the "usable" flag (malfunction)
44 proc vtab_cmd {param method args} {
47 return "CREATE TABLE t1(id TEXT, host TEXT, class TEXT)"
51 foreach {clist orderby mask} $args {}
58 for {set i 0} {$i < [llength $clist]} {incr i} {
60 array set C [lindex $clist $i]
61 if { ($C(usable) || ($param & 0x08))
62 && $C(op)=="eq" && ($param & 1<<$C(column))
71 set score [expr $score / [llength $ret]]
73 lappend ret cost $score rows $score
84 register_tcl_module db
86 for {set param1 0} {$param1<16} {incr param1} {
87 for {set param2 0} {$param2<16} {incr param2} {
89 register_tcl_module db
90 do_execsql_test 1.$param1.$param2.1 "
91 CREATE VIRTUAL TABLE t1 USING tcl('vtab_cmd $param1');
92 CREATE VIRTUAL TABLE t2 USING tcl('vtab_cmd $param2');
96 2 "select t1.id as ID from t1, t2 where t1.id=t2.host and t2.class='xx'"
98 select t1.id as ID from t1, t2 where t2.class ='xx' and t2.id = t1.host
101 select t1.id as ID from t1, t2 where t1.host = t2.id and t2. class ='xx'
105 if {($param1 & 0x08)==0 && ($param2 & 0x08)==0} {
107 do_execsql_test 1.$param1.$param2.$tn.a $sql {}
110 do_test 1.$param1.$param2.$tn.b {