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# 2020-01-29
#
# The author disclaims copyright to this source code. In place of
# a legal notice, here is a blessing:
#
# May you do good and not evil.
# May you find forgiveness for yourself and forgive others.
# May you share freely, never taking more than you give.
#
#***********************************************************************
#
set testdir [file dirname $argv0]
source $testdir/tester.tcl
set testprefix bestindex7
ifcapable !vtab {
finish_test
return
}
register_tcl_module db
proc vtab_command {src method args} {
switch -- $method {
xConnect {
return "CREATE TABLE xxx(a)"
}
xBestIndex {
set hdl [lindex $args 0]
set clist [$hdl constraints]
set orderby [$hdl orderby]
set mask [$hdl mask]
set iCons 0
set ret [list]
foreach cons $clist {
catch { array unset C }
array set C $cons
if {$C(usable)} {
lappend ret use $iCons
}
incr iCons
}
return $ret
}
xFilter {
return [list sql "SELECT rowid, x FROM $src"]
}
}
return {}
}
do_execsql_test 1.0 {
CREATE TABLE t1(x);
INSERT INTO t1 VALUES(0), (2);
CREATE VIRTUAL TABLE vt1 USING tcl(vtab_command t1);
}
do_execsql_test 1.1 { select * from vt1 } {0 2}
do_execsql_test 1.2 { select * from vt1 WHERE a=0 } {0}
do_execsql_test 1.3 { select * from vt1 WHERE a=1 } {}
do_execsql_test 1.4 { select * from vt1 WHERE a=1 OR a=0} {0}
do_execsql_test 1.5 {
UPDATE t1 SET x=NULL WHERE x=2;
}
do_execsql_test 1.6 { select * from vt1 } {0 {}}
do_execsql_test 1.7 { select * from vt1 WHERE a=0 } {0}
do_execsql_test 1.8 { select * from vt1 WHERE a=1 } {}
do_execsql_test 1.9 { select * from vt1 WHERE a=1 OR a=0} {0}
do_execsql_test 1.10 { select * from vt1 WHERE a IN (2) } {}
do_execsql_test 1.10 { select * from vt1 WHERE a IN (0,1,2,3) } {0}
do_execsql_test 1.11 { select * from vt1 WHERE a IN (0, NULL) } {0}
do_execsql_test 1.12 { select * from vt1 WHERE a IN (NULL) } {}
finish_test
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