clang/sqlite | Gitverse

test/joinH.test
123 строки3 KB
dan
Avoid assuming that an expression in an ON() clause that evaluates to zero implies that the query will return zero rows when the query contains a RIGHT JOIN. [forum:95849acbe1|Forum Post 95849acbe1].
25 апр 2023, 17:37
25 апр 2023, 17:370941ea8
# 2022 May 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.
#

set testdir [file dirname $argv0]
source $testdir/tester.tcl
set testprefix joinH

do_execsql_test 1.0 {
  CREATE TABLE t1(a INT);
  CREATE TABLE t2(b INT);
  INSERT INTO t2(b) VALUES(NULL);
}

db nullvalue NULL

do_execsql_test 1.1 {
  SELECT DISTINCT a FROM t1 FULL JOIN t2 ON true WHERE (b ISNULL);
} {NULL}
do_execsql_test 1.2 {
  SELECT a FROM t1 FULL JOIN t2 ON true;
} {NULL}
do_execsql_test 1.3 {
  SELECT a FROM t1 FULL JOIN t2 ON true WHERE (b ISNULL);
} {NULL}
do_execsql_test 1.4 {
  SELECT DISTINCT a FROM t1 FULL JOIN t2 ON true;
} {NULL}

#-----------------------------------------------------------

reset_db
do_execsql_test 2.0 {
  CREATE TABLE r3(x);
  CREATE TABLE r4(y INTEGER PRIMARY KEY);
  INSERT INTO r4 VALUES(55);
}

do_execsql_test 2.1 {
  SELECT 'value!' FROM r3 FULL JOIN r4 ON (y=x);
} {value!}

do_execsql_test 2.2 {
  SELECT 'value!' FROM r3 FULL JOIN r4 ON (y=x) WHERE +y=55;
} {value!}

#-----------------------------------------------------------
reset_db
do_execsql_test 3.1 {
  CREATE TABLE t0 (c0);
  CREATE TABLE t1 (c0);
  CREATE TABLE t2 (c0 , c1 , c2 , UNIQUE (c0), UNIQUE (c2 DESC));
  INSERT INTO t2 VALUES ('x', 'y', 'z');
  ANALYZE;
  CREATE VIEW v0(c0) AS SELECT FALSE;
}

do_catchsql_test 3.2 {
  SELECT * FROM t0 LEFT OUTER JOIN t1 ON v0.c0 INNER JOIN v0 INNER JOIN t2 ON (t2.c2 NOT NULL); 
} {1 {ON clause references tables to its right}}

#-------------------------------------------------------------

reset_db
do_execsql_test 4.1 {
  CREATE TABLE t1(a,b,c,d,e,f,g,h,PRIMARY KEY(a,b,c)) WITHOUT ROWID;
  CREATE TABLE t2(i, j);
  INSERT INTO t2 VALUES(10, 20);
}

do_execsql_test 4.2 {
  SELECT (d IS NULL) FROM t1 RIGHT JOIN t2 ON (j=33);
} {1}

do_execsql_test 4.3 {
  CREATE INDEX i1 ON t1( (d IS NULL), d );
}

do_execsql_test 4.4 {
  SELECT (d IS NULL) FROM t1 RIGHT JOIN t2 ON (j=33);
} {1}

#-------------------------------------------------------------------------
#
reset_db
do_execsql_test 5.0 {
  CREATE TABLE t0(w);
  CREATE TABLE t1(x);
  CREATE TABLE t2(y);
  CREATE TABLE t3(z);
  INSERT INTO t3 VALUES('t3val');
}

do_execsql_test 5.1 {
  SELECT * FROM t1 INNER JOIN t2 ON (0) RIGHT OUTER JOIN t3;
} {{} {} t3val}

do_execsql_test 5.2 {
  SELECT * FROM t1 INNER JOIN t2 ON (0) FULL OUTER JOIN t3;
} {{} {} t3val}

do_execsql_test 5.3 {
  SELECT * FROM t3 LEFT JOIN t2 ON (0);
} {t3val {}}

do_execsql_test 5.4 {
  SELECT * FROM t0 RIGHT JOIN t1 INNER JOIN t2 ON (0) RIGHT JOIN t3
} {{} {} {} t3val}

do_execsql_test 5.5 {
  SELECT * FROM t0 RIGHT JOIN t1 INNER JOIN t2 ON (0)
} {}

finish_test