MDEV-27015 Assertion `!is_null()' failed in FixedBinTypeBundle<FbtImp…

…l>::Fbt FixedBinTypeBundle<FbtImpl>::Field_fbt::to_fbt()

The assuption that Field::is_null() is always false when
Field_fbt::val_native() or Field_fbt::to_fbt() are called
was wrong.

In some cases, e.g. when this helper Field method is called:

  inline String *val_str(String *str, const uchar *new_ptr)

we temporarily reset Field::ptr to some alternative record buffer
but don't reset null_ptr, so null_ptr still points to null flags
of the original record. In such cases it's meaningless to test
the original Field::null_ptr when Field::ptr is temporarily reset:
they don't relate to each other.

Removing the DBUG_ASSERT.

plugin/type_inet/mysql-test/type_inet/type_inet6.result

@@ -2213,3 +2213,31 @@ SELECT * FROM companies;
 id	name
 DROP TABLE divisions;
 DROP TABLE companies;
+#
+# MDEV-27015 Assertion `!is_null()' failed in FixedBinTypeBundle<FbtImpl>::Fbt FixedBinTypeBundle<FbtImpl>::Field_fbt::to_fbt()
+#
+CREATE TABLE t1 (id int NOT NULL PRIMARY KEY, a INET6(6) DEFAULT '::10');
+INSERT INTO t1(id) VALUES (1), (2), (3), (4);
+INSERT INTO t1 VALUES (5,'::5'), (6,'::6');
+SELECT * FROM t1 ORDER BY a;
+id	a
+5	::5
+6	::6
+1	::10
+2	::10
+3	::10
+4	::10
+CREATE VIEW v1(a, m) AS SELECT a, MIN(id) FROM t1 GROUP BY a;
+CREATE TABLE t2 SELECT * FROM v1;
+SELECT * FROM v1 ORDER BY a;
+a	m
+::5	5
+::6	6
+::10	1
+SELECT * FROM t2 ORDER BY a;
+a	m
+::5	5
+::6	6
+::10	1
+DROP VIEW v1;
+DROP TABLE t1, t2;

plugin/type_inet/mysql-test/type_inet/type_inet6.test

@@ -1629,3 +1629,18 @@ DELETE FROM companies WHERE id IN (SELECT company_id FROM divisions);
 SELECT * FROM companies;
 DROP TABLE divisions;
 DROP TABLE companies;
+
+--echo #
+--echo # MDEV-27015 Assertion `!is_null()' failed in FixedBinTypeBundle<FbtImpl>::Fbt FixedBinTypeBundle<FbtImpl>::Field_fbt::to_fbt()
+--echo #
+
+CREATE TABLE t1 (id int NOT NULL PRIMARY KEY, a INET6(6) DEFAULT '::10');
+INSERT INTO t1(id) VALUES (1), (2), (3), (4);
+INSERT INTO t1 VALUES (5,'::5'), (6,'::6');
+SELECT * FROM t1 ORDER BY a;
+CREATE VIEW v1(a, m) AS SELECT a, MIN(id) FROM t1 GROUP BY a;
+CREATE TABLE t2 SELECT * FROM v1;
+SELECT * FROM v1 ORDER BY a;
+SELECT * FROM t2 ORDER BY a;
+DROP VIEW v1;
+DROP TABLE t1, t2;

plugin/type_inet/mysql-test/type_inet/type_inet6_sum.result

@@ -0,0 +1,51 @@
+#
+# Start of 10.7 tests
+#
+#
+#  MDEV-27015 Assertion `!is_null()' failed in FixedBinTypeBundle<FbtImpl>::Fbt FixedBinTypeBundle<FbtImpl>::Field_fbt::to_fbt()
+#
+CREATE TABLE t1 (i6 INET6, a1 TIME, a2 VARCHAR(10));
+INSERT INTO t1 VALUES ('::','09:43:12','uw'), ('70:ef59::46:c7b:f:678:bd9f','00:00:00','a');
+SELECT GROUP_CONCAT(IF(a1, i6, a2) ORDER BY 1) FROM t1;
+GROUP_CONCAT(IF(a1, i6, a2) ORDER BY 1)
+::
+Warnings:
+Warning	1292	Incorrect inet6 value: 'a'
+DROP TABLE t1;
+CREATE TABLE t1 (i6 inet6, a2 varchar(10));
+INSERT INTO t1 VALUES ('::','uw'), (null,'a');
+SELECT group_concat(coalesce(i6, a2) ORDER BY 1) FROM t1;
+group_concat(coalesce(i6, a2) ORDER BY 1)
+::
+Warnings:
+Warning	1292	Incorrect inet6 value: 'a'
+DROP TABLE t1;
+CREATE TABLE t1 (a INET6);
+INSERT INTO t1 VALUES();
+SELECT JSON_ARRAYAGG(a ORDER BY a DESC) FROM t1;
+JSON_ARRAYAGG(a ORDER BY a DESC)
+[null]
+DROP TABLE t1;
+CREATE TABLE t1 (i6 INET6, a1 INT, a2 VARCHAR(10));
+INSERT INTO t1 VALUES ('::',1,'uw'), ('70:ef59::46:c7b:f:678:bd9f',0,'a');
+SELECT GROUP_CONCAT(IF(a1, i6, a2) ORDER BY 1) FROM t1;
+GROUP_CONCAT(IF(a1, i6, a2) ORDER BY 1)
+::
+Warnings:
+Warning	1292	Incorrect inet6 value: 'a'
+DROP TABLE t1;
+CREATE TABLE t1 (i6 INET6, a2 VARCHAR(10));
+INSERT INTO t1 VALUES ('::',''), (NULL,NULL);
+SELECT GROUP_CONCAT(COALESCE(i6, a2) ORDER BY 1) FROM t1;
+GROUP_CONCAT(COALESCE(i6, a2) ORDER BY 1)
+::
+DROP TABLE t1;
+CREATE TABLE t1 (i6 INET6, a2 VARCHAR(10));
+INSERT INTO t1 VALUES ('::',''), (NULL,NULL);
+SELECT GROUP_CONCAT(DISTINCT COALESCE(i6, a2)) FROM t1;
+GROUP_CONCAT(DISTINCT COALESCE(i6, a2))
+::
+DROP TABLE t1;
+#
+# End of 10.7 tests
+#

plugin/type_inet/mysql-test/type_inet/type_inet6_sum.test

@@ -0,0 +1,41 @@
+--echo #
+--echo # Start of 10.7 tests
+--echo #
+
+--echo #
+--echo #  MDEV-27015 Assertion `!is_null()' failed in FixedBinTypeBundle<FbtImpl>::Fbt FixedBinTypeBundle<FbtImpl>::Field_fbt::to_fbt()
+--echo #
+
+CREATE TABLE t1 (i6 INET6, a1 TIME, a2 VARCHAR(10));
+INSERT INTO t1 VALUES ('::','09:43:12','uw'), ('70:ef59::46:c7b:f:678:bd9f','00:00:00','a');
+SELECT GROUP_CONCAT(IF(a1, i6, a2) ORDER BY 1) FROM t1;
+DROP TABLE t1;
+
+CREATE TABLE t1 (i6 inet6, a2 varchar(10));
+INSERT INTO t1 VALUES ('::','uw'), (null,'a');
+SELECT group_concat(coalesce(i6, a2) ORDER BY 1) FROM t1;
+DROP TABLE t1;
+
+CREATE TABLE t1 (a INET6);
+INSERT INTO t1 VALUES();
+SELECT JSON_ARRAYAGG(a ORDER BY a DESC) FROM t1;
+DROP TABLE t1;
+
+CREATE TABLE t1 (i6 INET6, a1 INT, a2 VARCHAR(10));
+INSERT INTO t1 VALUES ('::',1,'uw'), ('70:ef59::46:c7b:f:678:bd9f',0,'a');
+SELECT GROUP_CONCAT(IF(a1, i6, a2) ORDER BY 1) FROM t1;
+DROP TABLE t1;
+
+CREATE TABLE t1 (i6 INET6, a2 VARCHAR(10));
+INSERT INTO t1 VALUES ('::',''), (NULL,NULL);
+SELECT GROUP_CONCAT(COALESCE(i6, a2) ORDER BY 1) FROM t1;
+DROP TABLE t1;
+
+CREATE TABLE t1 (i6 INET6, a2 VARCHAR(10));
+INSERT INTO t1 VALUES ('::',''), (NULL,NULL);
+SELECT GROUP_CONCAT(DISTINCT COALESCE(i6, a2)) FROM t1;
+DROP TABLE t1;
+
+--echo #
+--echo # End of 10.7 tests
+--echo #

plugin/type_uuid/mysql-test/type_uuid/type_uuid_sum.result

@@ -0,0 +1,17 @@
+#
+# Start of 10.7 tests
+#
+#
+#  MDEV-27015 Assertion `!is_null()' failed in FixedBinTypeBundle<FbtImpl>::Fbt FixedBinTypeBundle<FbtImpl>::Field_fbt::to_fbt()
+#
+CREATE TABLE t1 (i6 UUID, a1 TIME, a2 VARCHAR(10));
+INSERT INTO t1 VALUES ('ffffffff-ffff-ffff-ffff-fffffffffffe','09:43:12','uw'), (uuid(),'00:00:00','a');
+SELECT GROUP_CONCAT(IF(a1, i6, a2) ORDER BY 1) FROM t1;
+GROUP_CONCAT(IF(a1, i6, a2) ORDER BY 1)
+ffffffff-ffff-ffff-ffff-fffffffffffe
+Warnings:
+Warning	1292	Incorrect uuid value: 'a'
+DROP TABLE t1;
+#
+# End of 10.7 tests
+#

plugin/type_uuid/mysql-test/type_uuid/type_uuid_sum.test

@@ -0,0 +1,17 @@
+--echo #
+--echo # Start of 10.7 tests
+--echo #
+
+--echo #
+--echo #  MDEV-27015 Assertion `!is_null()' failed in FixedBinTypeBundle<FbtImpl>::Fbt FixedBinTypeBundle<FbtImpl>::Field_fbt::to_fbt()
+--echo #
+
+CREATE TABLE t1 (i6 UUID, a1 TIME, a2 VARCHAR(10));
+INSERT INTO t1 VALUES ('ffffffff-ffff-ffff-ffff-fffffffffffe','09:43:12','uw'), (uuid(),'00:00:00','a');
+SELECT GROUP_CONCAT(IF(a1, i6, a2) ORDER BY 1) FROM t1;
+DROP TABLE t1;
+
+
+--echo #
+--echo # End of 10.7 tests
+--echo #

sql/sql_type_fixedbin.h

@@ -1190,7 +1190,6 @@ class FixedBinTypeBundle
     bool val_native(Native *to) override
     {
       DBUG_ASSERT(marked_for_read());
-      DBUG_ASSERT(!is_null());
       if (to->alloc(FbtImpl::binary_length()))
         return true;
       to->length(FbtImpl::binary_length());
@@ -1201,7 +1200,6 @@ class FixedBinTypeBundle
     Fbt to_fbt() const
     {
       DBUG_ASSERT(marked_for_read());
-      DBUG_ASSERT(!is_null());
       return Fbt::record_to_memory((const char*) ptr);
     }