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# 2024-04-26
#
# 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 bestindexC
ifcapable !vtab {
finish_test
return
}
register_tcl_module db
proc vtab_command {lVal method args} {
switch -- $method {
xConnect {
return "CREATE TABLE t1(a)"
}
xBestIndex {
set hdl [lindex $args 0]
set clist [$hdl constraints]
set orderby [$hdl orderby]
set idxstr [list]
set res [list]
set idx 0
foreach c $clist {
array set a $c
if {$a(usable)==0} continue
if {$a(op)=="limit" && ![info exists ::do_not_use_limit]} {
lappend idxstr limit
lappend res omit $idx
}
if {$a(op)=="offset" && ![info exists ::do_not_use_offset]} {
lappend idxstr offset
lappend res omit $idx
}
incr idx
}
return "cost 1000000 rows 1000000 idxnum 0 idxstr {$idxstr} $res"
}
xFilter {
set idxstr [lindex $args 1]
set LIMIT ""
foreach a $idxstr b [lindex $args 2] {
set x($a) $b
}
if {![info exists x(limit)]} { set x(limit) -1 }
if {![info exists x(offset)]} { set x(offset) -1 }
set LIMIT " LIMIT $x(limit) OFFSET $x(offset)"
set idx 1
foreach v $lVal {
lappend lRow "($idx, '$v')"
incr idx
}
return [list sql "
SELECT * FROM ( VALUES [join $lRow ,]) $LIMIT
"]
}
}
return {}
}
do_execsql_test 1.0 {
CREATE VIRTUAL TABLE x1 USING tcl(vtab_command "a b c d e f");
CREATE VIRTUAL TABLE x2 USING tcl(vtab_command "A B C D E F a b");
} {}
do_execsql_test 1.1 {
CREATE TEMP TABLE t_unionall AS
SELECT * FROM x1 UNION ALL SELECT * FROM x2;
CREATE TEMP TABLE t_intersect AS
SELECT * FROM x1 INTERSECT SELECT * FROM x2;
CREATE TEMP TABLE t_union AS
SELECT * FROM x1 UNION SELECT * FROM x2;
CREATE TEMP TABLE t_except AS
SELECT * FROM x1 EXCEPT SELECT * FROM x2;
}
foreach {tn limit} {
1 "LIMIT 8"
2 "LIMIT 4"
3 "LIMIT 4 OFFSET 2"
4 "LIMIT 8 OFFSET 4"
} {
foreach {op tbl} {
"UNION ALL" t_unionall
"UNION" t_union
"INTERSECT" t_intersect
"EXCEPT" t_except
} {
set expect [execsql "SELECT * FROM $tbl $limit"]
do_execsql_test 1.2.$tbl.$tn "SELECT * FROM (
SELECT * FROM x1 $op SELECT * FROM x2
) $limit" $expect
}
}
#-------------------------------------------------------------------------
reset_db
register_tcl_module db
do_execsql_test 2.0 {
CREATE VIRTUAL TABLE x1 USING tcl(vtab_command "a b c d e f");
CREATE VIRTUAL TABLE x2 USING tcl(vtab_command "a b e f");
} {}
do_execsql_test 2.1 {
SELECT * FROM x1
EXCEPT
SELECT * FROM x2
LIMIT 3
} {c d}
#-------------------------------------------------------------------------
reset_db
register_tcl_module db
do_execsql_test 3.0 {
CREATE VIRTUAL TABLE y1 USING tcl(vtab_command "1 2 3 4 5 6 7 8 9 10");
} {}
do_execsql_test 3.1 {
SELECT * FROM y1 WHERE a = COALESCE('8', a) LIMIT 3
} {8}
do_execsql_test 3.2 {
SELECT * FROM y1 WHERE a = '2' LIMIT 3
} {2}
load_static_extension db series
do_execsql_test 3.3 {
SELECT * FROM generate_series(1, 5) WHERE value = (value & 14) LIMIT 3
} {2 4}
do_execsql_test 3.4 {
SELECT value FROM generate_series(1,10) WHERE value>2 LIMIT 4 OFFSET 1;
} {4 5 6 7}
set ::do_not_use_limit 1
do_execsql_test 3.5 {
SELECT * FROM y1 LIMIT 5 OFFSET 3
} {4 5 6 7 8}
unset ::do_not_use_limit
set ::do_not_use_offset 1
do_execsql_test 3.6 {
SELECT * FROM y1 LIMIT 5 OFFSET 3
} {4 5 6 7 8}
unset ::do_not_use_offset
#-------------------------------------------------------------------------
reset_db
proc vtab_command {lVal method args} {
switch -- $method {
xConnect { error "not happy!" }
}
return {}
}
register_tcl_module db
do_catchsql_test 4.0 {
CREATE VIRTUAL TABLE y1 USING tcl(vtab_command 1);
} {1 {not happy!}}
do_test 4.1 {
sqlite3_errcode db
} SQLITE_ERROR
proc vtab_command {lVal method args} {
switch -- $method {
xConnect {
return $lVal
}
}
return {}
}
do_catchsql_test 4.2 {
CREATE VIRTUAL TABLE y1 USING tcl(vtab_command "PRAGMA page_size=1024");
} {1 {declare_vtab: syntax error}}
do_catchsql_test 4.3 {
CREATE VIRTUAL TABLE y1 USING tcl(vtab_command "CREATE TABLE x1(");
} {1 {declare_vtab: incomplete input}}
do_catchsql_test 4.4 {
CREATE VIRTUAL TABLE y1 USING tcl(vtab_command "CREATE TABLE x1(insert)");
} {1 {declare_vtab: near "insert": syntax error}}
finish_test
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