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When the left-most table of a RIGHT JOIN is implemented as a co-routine,

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make sure all its columns are flushed to NULL when it finishes so that
they appear to be NULL during the RIGHT JOIN post-processing.

FossilOrigin-Name: f84b2beca719758979d7a5a63c3d16d5121a7518b3fbe5039af474a83dd569c2
This commit is contained in:
drh
2022-04-10 19:51:22 +00:00
parent e21e36dd2c
commit fcde633f7c
4 changed files with 37 additions and 27 deletions
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45
test/join7.test
View File

@ -15,6 +15,7 @@
set testdir [file dirname $argv0]
source $testdir/tester.tcl
db nullvalue NULL
do_execsql_test join7-1.1 {
CREATE TABLE t1(a int,b int);
INSERT INTO t1 VALUES(1,2),(1,3),(1,4);
@ -22,7 +23,8 @@ do_execsql_test join7-1.1 {
CREATE TABLE t2(c int,d int);
INSERT INTO t2 VALUES(3,33),(4,44),(5,55);
CREATE INDEX t2c ON t2(c);
SELECT quote(b), quote(d) FROM t1 FULL OUTER JOIN t2 ON b=c ORDER BY +b;
CREATE VIEW dual AS SELECT 'x' AS dummy;
SELECT b, d FROM t1 FULL OUTER JOIN t2 ON b=c ORDER BY +b;
} {
NULL 55
2 NULL
@ -30,7 +32,7 @@ do_execsql_test join7-1.1 {
4 44
}
do_execsql_test join7-1.2 {
SELECT quote(a), quote(c) FROM t1 FULL OUTER JOIN t2 ON b=c ORDER BY +b;
SELECT a, c FROM t1 FULL OUTER JOIN t2 ON b=c ORDER BY +b;
} {
NULL 5
1 NULL
@ -38,25 +40,36 @@ do_execsql_test join7-1.2 {
1 4
}
do_execsql_test join7-1.3 {
SELECT quote(a), quote(b), quote(c), quote(d)
FROM t1 FULL OUTER JOIN t2 ON b=c ORDER BY +b;
SELECT * FROM t1 FULL OUTER JOIN t2 ON b=c ORDER BY +b;
} {
NULL NULL 5 55
1 2 NULL NULL
1 3 3 33
1 4 4 44
}
do_execsql_test join7-1.4 {
SELECT quote(a), quote(b), quote(c), quote(d)
FROM t1 RIGHT OUTER JOIN t2 ON b=c ORDER BY +b;
do_execsql_test join7-1.4a {
SELECT * FROM t1 RIGHT OUTER JOIN t2 ON b=c ORDER BY +b;
} {
NULL NULL 5 55
1 3 3 33
1 4 4 44
}
do_execsql_test join7-1.4b {
SELECT * FROM dual JOIN t1 ON true RIGHT OUTER JOIN t2 ON b=c ORDER BY +b;
} {
NULL NULL NULL 5 55
x 1 3 3 33
x 1 4 4 44
}
do_execsql_test join7-1.4c {
SELECT * FROM dual CROSS JOIN t1 RIGHT OUTER JOIN t2 ON b=c ORDER BY +b;
} {
NULL NULL NULL 5 55
x 1 3 3 33
x 1 4 4 44
}
do_execsql_test join7-1.5 {
SELECT quote(a), quote(b), quote(c), quote(d)
FROM t1 LEFT OUTER JOIN t2 ON b=c ORDER BY +b;
SELECT * FROM t1 LEFT OUTER JOIN t2 ON b=c ORDER BY +b;
} {
1 2 NULL NULL
1 3 3 33
@ -64,8 +77,7 @@ do_execsql_test join7-1.5 {
}
do_execsql_test join7-2.1 {
SELECT quote(a), quote(b), quote(c), quote(d)
FROM t1 FULL OUTER JOIN t2 ON b=c AND a=1 ORDER BY +b;
SELECT * FROM t1 FULL OUTER JOIN t2 ON b=c AND a=1 ORDER BY +b;
} {
NULL NULL 5 55
1 2 NULL NULL
@ -73,24 +85,21 @@ do_execsql_test join7-2.1 {
1 4 4 44
}
do_execsql_test join7-2.2 {
SELECT quote(a), quote(b), quote(c), quote(d)
FROM t1 FULL OUTER JOIN t2 ON b=c WHERE a=1 ORDER BY +b;
SELECT * FROM t1 FULL OUTER JOIN t2 ON b=c WHERE a=1 ORDER BY +b;
} {
1 2 NULL NULL
1 3 3 33
1 4 4 44
}
do_execsql_test join7-2.3 {
SELECT quote(a), quote(b), quote(c), quote(d)
FROM t1 FULL OUTER JOIN t2 ON b=c WHERE a IS NULL ORDER BY +d;
SELECT * FROM t1 FULL OUTER JOIN t2 ON b=c WHERE a IS NULL ORDER BY +d;
} {
NULL NULL 3 33
NULL NULL 4 44
NULL NULL 5 55
}
do_execsql_test join7-2.4 {
SELECT quote(a), quote(b), quote(c), quote(d)
FROM t1 FULL OUTER JOIN t2 ON b=c AND d<=0 ORDER BY +b, +d;
SELECT * FROM t1 FULL OUTER JOIN t2 ON b=c AND d<=0 ORDER BY +b, +d;
} {
NULL NULL 3 33
NULL NULL 4 44
@ -100,6 +109,4 @@ do_execsql_test join7-2.4 {
1 4 NULL NULL
}
finish_test