sqlite3/test/filter1.test

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# 2018 May 8
#
# 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.
#
set testdir [file dirname $argv0]
source $testdir/tester.tcl
set testprefix filter1
ifcapable !windowfunc {
finish_test
return
}
do_execsql_test 1.0 {
CREATE TABLE t1(a);
CREATE INDEX i1 ON t1(a);
INSERT INTO t1 VALUES(1), (2), (3), (4), (5), (6), (7), (8), (9);
}
do_execsql_test 1.1 { SELECT sum(a) FROM t1; } 45
do_execsql_test 1.2 { SELECT sum(a) FILTER( WHERE a<5 ) FROM t1; } 10
do_execsql_test 1.3 {
SELECT sum(a) FILTER( WHERE a>9 ),
sum(a) FILTER( WHERE a>8 ),
sum(a) FILTER( WHERE a>7 ),
sum(a) FILTER( WHERE a>6 ),
sum(a) FILTER( WHERE a>5 ),
sum(a) FILTER( WHERE a>4 ),
sum(a) FILTER( WHERE a>3 ),
sum(a) FILTER( WHERE a>2 ),
sum(a) FILTER( WHERE a>1 ),
sum(a) FILTER( WHERE a>0 )
FROM t1;
} {{} 9 17 24 30 35 39 42 44 45}
do_execsql_test 1.4 {
SELECT max(a) FILTER (WHERE (a % 2)==0) FROM t1
} {8}
do_execsql_test 1.5 {
SELECT min(a) FILTER (WHERE a>4) FROM t1
} {5}
do_execsql_test 1.6 {
SELECT count(*) FILTER (WHERE a!=5) FROM t1
} {8}
do_execsql_test 1.7 {
SELECT min(a) FILTER (WHERE a>3) FROM t1 GROUP BY (a%2) ORDER BY 1;
} {4 5}
do_execsql_test 1.8 {
CREATE VIEW vv AS
SELECT sum(a) FILTER( WHERE a>9 ),
sum(a) FILTER( WHERE a>8 ),
sum(a) FILTER( WHERE a>7 ),
sum(a) FILTER( WHERE a>6 ),
sum(a) FILTER( WHERE a>5 ),
sum(a) FILTER( WHERE a>4 ),
sum(a) FILTER( WHERE a>3 ),
sum(a) FILTER( WHERE a>2 ),
sum(a) FILTER( WHERE a>1 ),
sum(a) FILTER( WHERE a>0 )
FROM t1;
SELECT * FROM vv;
} {{} 9 17 24 30 35 39 42 44 45}
#-------------------------------------------------------------------------
# Test some errors:
#
# .1 FILTER on a non-aggregate function,
# .2 Window function in FILTER clause,
# .3 Aggregate function in FILTER clause,
#
reset_db
do_execsql_test 2.0 {
CREATE TABLE t1(a);
INSERT INTO t1 VALUES(1), (2), (3), (4), (5), (6), (7), (8), (9);
}
do_catchsql_test 2.1 {
SELECT upper(a) FILTER (WHERE a=1) FROM t1
} {1 {FILTER may not be used with non-aggregate upper()}}
do_catchsql_test 2.2 {
SELECT sum(a) FILTER (WHERE 1 - max(a) OVER () > 0) FROM t1
} {1 {misuse of window function max()}}
do_catchsql_test 2.3 {
SELECT sum(a) FILTER (WHERE 1 - count(a)) FROM t1
} {1 {misuse of aggregate function count()}}
#-------------------------------------------------------------------------
reset_db
do_execsql_test 3.0 {
CREATE TABLE t1(a,b);
INSERT INTO t1 VALUES(1, 1);
}
do_execsql_test 3.1 {
SELECT b, max(a) FILTER (WHERE b='x') FROM t1;
} {1 {}}
do_execsql_test 3.2 {
CREATE TABLE t2(a, b, c);
INSERT INTO t2 VALUES(1, 2, 3);
INSERT INTO t2 VALUES(1, 3, 4);
INSERT INTO t2 VALUES(2, 5, 6);
INSERT INTO t2 VALUES(2, 7, 8);
}
do_execsql_test 3.3 {
SELECT a, c, max(b) FILTER (WHERE c='x') FROM t2 GROUP BY a;
} {1 3 {} 2 6 {}}
do_execsql_test 3.4 {
DELETE FROM t2;
INSERT INTO t2 VALUES(1, 5, 'x');
INSERT INTO t2 VALUES(1, 2, 3);
INSERT INTO t2 VALUES(1, 4, 'x');
INSERT INTO t2 VALUES(2, 5, 6);
INSERT INTO t2 VALUES(2, 7, 8);
}
do_execsql_test 3.5 {
SELECT a, c, max(b) FILTER (WHERE c='x') FROM t2 GROUP BY a;
} {1 x 5 2 6 {}}
#-------------------------------------------------------------------------
reset_db
do_execsql_test 4.0 {
CREATE TABLE t1(a, b, c);
INSERT INTO t1 VALUES('a', 0, 5);
INSERT INTO t1 VALUES('a', 1, 10);
INSERT INTO t1 VALUES('a', 0, 15);
INSERT INTO t1 VALUES('b', 0, 5);
INSERT INTO t1 VALUES('b', 1, 1000);
INSERT INTO t1 VALUES('b', 0, 5);
INSERT INTO t1 VALUES('c', 0, 1);
INSERT INTO t1 VALUES('c', 1, 2);
INSERT INTO t1 VALUES('c', 0, 3);
}
do_execsql_test 4.1 {
SELECT avg(c) FILTER (WHERE b!=1) AS h FROM t1 GROUP BY a ORDER BY h;
} {2.0 5.0 10.0}
do_execsql_test 4.2 {
SELECT avg(c) FILTER (WHERE b!=1) AS h FROM t1 GROUP BY a ORDER BY (h+1.0);
} {2.0 5.0 10.0}
do_execsql_test 4.3 {
SELECT a, avg(c) FILTER (WHERE b!=1) AS h FROM t1 GROUP BY a ORDER BY avg(c);
} {c 2.0 a 10.0 b 5.0}
do_execsql_test 4.4 {
SELECT a, avg(c) FILTER (WHERE b!=1) FROM t1 GROUP BY a ORDER BY 2
} {c 2.0 b 5.0 a 10.0}
#-------------------------------------------------------------------------
reset_db
do_execsql_test 5.0 {
CREATE TABLE t1(a, b);
INSERT INTO t1 VALUES(1, 2);
INSERT INTO t1 VALUES(1, 3);
}
do_execsql_test 5.1 {
SELECT count(*) FILTER (WHERE b>2) FROM (SELECT * FROM t1)
} {1}
do_execsql_test 5.2 {
SELECT count(*) FILTER (WHERE b>2) OVER () FROM (SELECT * FROM t1)
} {1 1}
do_execsql_test 5.3 {
SELECT count(*) FILTER (WHERE b>2) OVER (ORDER BY b) FROM (SELECT * FROM t1)
} {0 1}
#-------------------------------------------------------------------------
reset_db
do_execsql_test 6.0 {
CREATE TABLE t1(a,b);
INSERT INTO t1 VALUES(1,1);
INSERT INTO t1 VALUES(2,2);
CREATE TABLE t2(x,y);
INSERT INTO t2 VALUES(1,1);
}
do_execsql_test 6.1 {
SELECT (SELECT COUNT(a) FILTER(WHERE x) FROM t2) FROM t1;
} {1 1}
do_execsql_test 6.2 {
SELECT (SELECT COUNT(a+x) FROM t2) FROM t1;
} {1 1}
do_execsql_test 6.3 {
SELECT (SELECT COUNT(a) FROM t2) FROM t1;
} {2}
#-------------------------------------------------------------------------
reset_db
do_execsql_test 7.0 {
CREATE TABLE t1(a INTEGER PRIMARY KEY, b);
INSERT INTO t1 VALUES(321, 100000);
INSERT INTO t1 VALUES(111, 110000);
INSERT INTO t1 VALUES(444, 120000);
INSERT INTO t1 VALUES(222, 130000);
}
do_execsql_test 7.1 {
SELECT max(a), max(a) FILTER (WHERE b<12345), b FROM t1;
} {
444 {} 120000
}
# 2023-02-17 dbsqlfuzz 4f8e0de6e272bbbb3e1b41cb5aea31e0b47297e3
# count() with FILTER clause using the COUNTOFVIEW optimization.
#
reset_db
do_execsql_test 8.0 {
CREATE TABLE t0(c0 INT);
CREATE TABLE t1a(a INTEGER PRIMARY KEY, b TEXT);
INSERT INTO t1a VALUES(1,'one'),(2,NULL),(3,'three');
CREATE TABLE t1b(c INTEGER PRIMARY KEY, d TEXT);
INSERT INTO t1b VALUES(4,'four'),(5,NULL),(6,'six');
CREATE VIEW t1 AS SELECT a, b FROM t1a UNION ALL SELECT c, d FROM t1b;
SELECT count()FILTER(WHERE b IS NULL) FROM t1;
} 2
finish_test