mirror of https://github.com/sqlite/sqlite
102 lines
2.1 KiB
Plaintext
102 lines
2.1 KiB
Plaintext
# 2016 June 17
|
|
#
|
|
# 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.
|
|
#
|
|
#***********************************************************************
|
|
# This file implements regression tests for SQLite library. The
|
|
# focus is on testing that cursor-hints are correct for queries
|
|
# involving LEFT JOIN.
|
|
#
|
|
|
|
|
|
set testdir [file dirname $argv0]
|
|
source $testdir/tester.tcl
|
|
set ::testprefix cursorhint2
|
|
|
|
ifcapable !cursorhints {
|
|
finish_test
|
|
return
|
|
}
|
|
|
|
proc extract_hints {sql} {
|
|
|
|
db eval "SELECT tbl_name, rootpage FROM sqlite_master where rootpage" {
|
|
set lookup($rootpage) $tbl_name
|
|
}
|
|
|
|
set ret [list]
|
|
db eval "EXPLAIN $sql" a {
|
|
switch -- $a(opcode) {
|
|
OpenRead {
|
|
set csr($a(p1)) $lookup($a(p2))
|
|
}
|
|
CursorHint {
|
|
lappend ret $csr($a(p1)) $a(p4)
|
|
}
|
|
}
|
|
}
|
|
|
|
set ret
|
|
}
|
|
|
|
proc do_extract_hints_test {tn sql ret} {
|
|
uplevel [list do_test $tn [list extract_hints $sql] [list {*}$ret]]
|
|
}
|
|
|
|
do_execsql_test 1.0 {
|
|
PRAGMA automatic_index = 0;
|
|
CREATE TABLE t1(a, b);
|
|
CREATE TABLE t2(c, d);
|
|
CREATE TABLE t3(e, f);
|
|
}
|
|
|
|
do_extract_hints_test $tn.1.1 {
|
|
SELECT * FROM t1 WHERE a=1;
|
|
} {
|
|
t1 EQ(c0,1)
|
|
}
|
|
|
|
do_extract_hints_test $tn.1.2 {
|
|
SELECT * FROM t1 CROSS JOIN t2 ON (a=c) WHERE d IS NULL;
|
|
} {
|
|
t2 {AND(ISNULL(c1),EQ(r[1],c0))}
|
|
}
|
|
|
|
do_extract_hints_test $tn.1.3 {
|
|
SELECT * FROM t1 LEFT JOIN t2 ON (a=c) WHERE d IS NULL;
|
|
} {
|
|
t2 {EQ(r[2],c0)}
|
|
}
|
|
|
|
do_extract_hints_test $tn.1.4 {
|
|
SELECT * FROM t1 LEFT JOIN t2 ON (a=c AND a=10) WHERE d IS NULL;
|
|
} {
|
|
t2 {AND(EQ(r[2],c0),EQ(r[3],10))}
|
|
}
|
|
|
|
do_extract_hints_test $tn.1.5 {
|
|
SELECT * FROM t1 CROSS JOIN t2 ON (a=c AND a=10) WHERE d IS NULL;
|
|
} {
|
|
t1 EQ(c0,10) t2 {AND(ISNULL(c1),EQ(r[3],c0))}
|
|
}
|
|
|
|
do_extract_hints_test $tn.1.6 {
|
|
SELECT * FROM t1 LEFT JOIN t2 ON (a=c) LEFT JOIN t3 ON (d=f);
|
|
} {
|
|
t2 {EQ(r[2],c0)} t3 {EQ(r[6],c1)}
|
|
}
|
|
|
|
do_extract_hints_test $tn.1.6 {
|
|
SELECT * FROM t1 LEFT JOIN t2 ON (a=c AND d=e) LEFT JOIN t3 ON (d=f);
|
|
} {
|
|
t2 {EQ(r[2],c0)} t3 {EQ(r[6],c1)}
|
|
}
|
|
|
|
finish_test
|
|
|