2ed4f5016a
improved understandability and maintainability. FossilOrigin-Name: 41a41c173a9d15d94f23d73a5c04bfb1616cb9223bc81d41808f9b4d00817fbf
95 lines
2.7 KiB
Plaintext
95 lines
2.7 KiB
Plaintext
# 2024-08-15
|
|
#
|
|
# 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.
|
|
#
|
|
# Specifically, it tests cases with order-by-subquery optimization in which
|
|
# an ORDER BY in a subquery is used to help resolve an ORDER BY in the
|
|
# outer query without having to do an extra sort.
|
|
#
|
|
|
|
set testdir [file dirname $argv0]
|
|
source $testdir/tester.tcl
|
|
set ::testprefix orderbyb
|
|
|
|
db null NULL
|
|
do_execsql_test 1.0 {
|
|
CREATE TABLE t1(a TEXT, b TEXT, c INT);
|
|
INSERT INTO t1 VALUES(NULL,NULL,NULL);
|
|
WITH RECURSIVE c(n) AS (VALUES(1) UNION ALL SELECT n+1 FROM c WHERE n<7)
|
|
INSERT INTO t1(a,b,c) SELECT char(p,p), char(q,q), n FROM
|
|
(SELECT ((n-1)%4)+0x61 AS p, abs(n*2-9+(n>=5))+0x60 AS q, n FROM c);
|
|
UPDATE t1 SET b=upper(b) WHERE c=1;
|
|
CREATE TABLE t2(k TEXT PRIMARY KEY, v INT) WITHOUT ROWID;
|
|
WITH RECURSIVE c(n) AS (VALUES(1) UNION ALL SELECT n+1 FROM c WHERE n<7)
|
|
INSERT INTO t2(k,v) SELECT char(0x60+n,0x60+n), n FROM c;
|
|
WITH RECURSIVE c(n) AS (VALUES(1) UNION ALL SELECT n+1 FROM c WHERE n<7)
|
|
INSERT INTO t2(k,v) SELECT char(0x40+n,0x40+n), n FROM c;
|
|
SELECT a,b,c,tx.v AS 'v-a', ty.v AS 'v-b'
|
|
FROM t1 LEFT JOIN t2 AS tx ON tx.k=a
|
|
LEFT JOIN t2 AS ty ON ty.k=b
|
|
ORDER BY c;
|
|
} {
|
|
NULL NULL NULL NULL NULL
|
|
aa GG 1 1 7
|
|
bb ee 2 2 5
|
|
cc cc 3 3 3
|
|
dd aa 4 4 1
|
|
aa bb 5 1 2
|
|
bb dd 6 2 4
|
|
cc ff 7 3 6
|
|
}
|
|
|
|
do_eqp_execsql_test 1.1 {
|
|
WITH t3(x,y) AS (SELECT a, b FROM t1 ORDER BY a, b LIMIT 8)
|
|
SELECT x, y, v FROM t3 LEFT JOIN t2 ON k=t3.y ORDER BY x, y COLLATE nocase;
|
|
} {
|
|
QUERY PLAN
|
|
|--CO-ROUTINE t3
|
|
| |--SCAN t1
|
|
| `--USE TEMP B-TREE FOR ORDER BY
|
|
|--SCAN t3
|
|
|--SEARCH t2 USING PRIMARY KEY (k=?) LEFT-JOIN
|
|
`--USE TEMP B-TREE FOR LAST TERM OF ORDER BY
|
|
} {
|
|
NULL NULL NULL
|
|
aa bb 2
|
|
aa GG 7
|
|
bb dd 4
|
|
bb ee 5
|
|
cc cc 3
|
|
cc ff 6
|
|
dd aa 1
|
|
}
|
|
|
|
do_eqp_execsql_test 1.2 {
|
|
WITH t3(x,y) AS MATERIALIZED (SELECT a, b COLLATE nocase FROM t1 ORDER BY 1,2)
|
|
SELECT x, y, v FROM t3 LEFT JOIN t2 ON k=t3.y ORDER BY x,y;
|
|
} {
|
|
QUERY PLAN
|
|
|--MATERIALIZE t3
|
|
| |--SCAN t1
|
|
| `--USE TEMP B-TREE FOR ORDER BY
|
|
|--SCAN t3
|
|
`--SEARCH t2 USING PRIMARY KEY (k=?) LEFT-JOIN
|
|
} {
|
|
NULL NULL NULL
|
|
aa bb 2
|
|
aa GG 7
|
|
bb dd 4
|
|
bb ee 5
|
|
cc cc 3
|
|
cc ff 6
|
|
dd aa 1
|
|
}
|
|
|
|
|
|
finish_test
|