MDEV-8525 mariadb 10.0.20 crashing when data is read by Kodi media center (http://kodi.tv).

Item_direct_view_ref maintains its own item_const() method so should use it when asked of temporary table field to be in sync with it.

mysql-test/r/view.result

@@ -5597,6 +5597,108 @@ count(v3.i)
 0
 drop table t1, t2;
 drop view v3;
+#
+# MDEV-8525: mariadb 10.0.20 crashing when data is read by Kodi 
+# media center (http://kodi.tv).
+#
+CREATE TABLE `t1` (
+`idSong` int(11) NOT NULL AUTO_INCREMENT,
+`idAlbum` int(11) DEFAULT NULL,
+`idPath` int(11) DEFAULT NULL,
+`strArtists` text,
+`strGenres` text,
+`strTitle` varchar(512) DEFAULT NULL,
+`iTrack` int(11) DEFAULT NULL,
+`iDuration` int(11) DEFAULT NULL,
+`iYear` int(11) DEFAULT NULL,
+`dwFileNameCRC` text,
+`strFileName` text,
+`strMusicBrainzTrackID` text,
+`iTimesPlayed` int(11) DEFAULT NULL,
+`iStartOffset` int(11) DEFAULT NULL,
+`iEndOffset` int(11) DEFAULT NULL,
+`idThumb` int(11) DEFAULT NULL,
+`lastplayed` varchar(20) DEFAULT NULL,
+`rating` char(1) DEFAULT '0',
+`comment` text,
+`mood` text,
+PRIMARY KEY (`idSong`),
+UNIQUE KEY `idxSong7` (`idAlbum`,`strMusicBrainzTrackID`(36)),
+KEY `idxSong` (`strTitle`(255)),
+KEY `idxSong1` (`iTimesPlayed`),
+KEY `idxSong2` (`lastplayed`),
+KEY `idxSong3` (`idAlbum`),
+KEY `idxSong6` (`idPath`,`strFileName`(255))
+)  DEFAULT CHARSET=utf8;
+INSERT INTO `t1` VALUES (1,1,1,'strArtists1','strGenres1','strTitle1',1,100,2000,NULL,'strFileName1','strMusicBrainzTrackID1',0,0,0,NULL,NULL,'0','',''),(2,2,2,'strArtists2','strGenres2','strTitle2',2,200,2001,NULL,'strFileName2','strMusicBrainzTrackID2',0,0,0,NULL,NULL,'0','','');
+CREATE TABLE `t2` (
+`idAlbum` int(11) NOT NULL AUTO_INCREMENT,
+`strAlbum` varchar(256) DEFAULT NULL,
+`strMusicBrainzAlbumID` text,
+`strArtists` text,
+`strGenres` text,
+`iYear` int(11) DEFAULT NULL,
+`idThumb` int(11) DEFAULT NULL,
+`bCompilation` int(11) NOT NULL DEFAULT '0',
+`strMoods` text,
+`strStyles` text,
+`strThemes` text,
+`strReview` text,
+`strImage` text,
+`strLabel` text,
+`strType` text,
+`iRating` int(11) DEFAULT NULL,
+`lastScraped` varchar(20) DEFAULT NULL,
+`dateAdded` varchar(20) DEFAULT NULL,
+`strReleaseType` text,
+PRIMARY KEY (`idAlbum`),
+UNIQUE KEY `idxAlbum_2` (`strMusicBrainzAlbumID`(36)),
+KEY `idxAlbum` (`strAlbum`(255)),
+KEY `idxAlbum_1` (`bCompilation`)
+) DEFAULT CHARSET=utf8;
+INSERT INTO `t2` VALUES (1,'strAlbum1','strMusicBrainzAlbumID1','strArtists1','strGenres1',2000,NULL,0,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,'album');
+CREATE TABLE `t3` (
+`idArtist` int(11) DEFAULT NULL,
+`idAlbum` int(11) DEFAULT NULL,
+`strJoinPhrase` text,
+`boolFeatured` int(11) DEFAULT NULL,
+`iOrder` int(11) DEFAULT NULL,
+`strArtist` text,
+UNIQUE KEY `idxAlbumArtist_1` (`idAlbum`,`idArtist`),
+UNIQUE KEY `idxAlbumArtist_2` (`idArtist`,`idAlbum`),
+KEY `idxAlbumArtist_3` (`boolFeatured`)
+) DEFAULT CHARSET=utf8;
+INSERT INTO `t3` VALUES (1,1,'',0,0,'strArtist1');
+CREATE TABLE `t4` (
+`idArtist` int(11) NOT NULL AUTO_INCREMENT,
+`strArtist` varchar(256) DEFAULT NULL,
+`strMusicBrainzArtistID` text,
+`strBorn` text,
+`strFormed` text,
+`strGenres` text,
+`strMoods` text,
+`strStyles` text,
+`strInstruments` text,
+`strBiography` text,
+`strDied` text,
+`strDisbanded` text,
+`strYearsActive` text,
+`strImage` text,
+`strFanart` text,
+`lastScraped` varchar(20) DEFAULT NULL,
+`dateAdded` varchar(20) DEFAULT NULL,
+PRIMARY KEY (`idArtist`),
+UNIQUE KEY `idxArtist1` (`strMusicBrainzArtistID`(36)),
+KEY `idxArtist` (`strArtist`(255))
+) DEFAULT CHARSET=utf8;
+INSERT INTO `t4` VALUES (1,'strArtist1','strMusicBrainzArtistID',NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL);
+CREATE VIEW `v1` AS select `t2`.`idAlbum` AS `idAlbum`,`t2`.`strAlbum` AS `strAlbum`,`t2`.`strMusicBrainzAlbumID` AS `strMusicBrainzAlbumID`,`t2`.`strArtists` AS `strArtists`,`t2`.`strGenres` AS `strGenres`,`t2`.`iYear` AS `iYear`,`t2`.`strMoods` AS `strMoods`,`t2`.`strStyles` AS `strStyles`,`t2`.`strThemes` AS `strThemes`,`t2`.`strReview` AS `strReview`,`t2`.`strLabel` AS `strLabel`,`t2`.`strType` AS `strType`,`t2`.`strImage` AS `strImage`,`t2`.`iRating` AS `iRating`,`t2`.`bCompilation` AS `bCompilation`,(select min(`t1`.`iTimesPlayed`) from `t1` where (`t1`.`idAlbum` = `t2`.`idAlbum`)) AS `iTimesPlayed`,`t2`.`strReleaseType` AS `strReleaseType` from `t2`;
+CREATE VIEW `v2` AS select `t3`.`idAlbum` AS `idAlbum`,`t3`.`idArtist` AS `idArtist`,`t4`.`strArtist` AS `strArtist`,`t4`.`strMusicBrainzArtistID` AS `strMusicBrainzArtistID`,`t3`.`boolFeatured` AS `boolFeatured`,`t3`.`strJoinPhrase` AS `strJoinPhrase`,`t3`.`iOrder` AS `iOrder` from (`t3` join `t4` on((`t3`.`idArtist` = `t4`.`idArtist`)));
+SELECT v1.*,v2.* FROM v1 LEFT JOIN v2 ON v1.idAlbum = v2.idAlbum WHERE v1.idAlbum = 1 ORDER BY v2.iOrder;
+idAlbum	strAlbum	strMusicBrainzAlbumID	strArtists	strGenres	iYear	strMoods	strStyles	strThemes	strReview	strLabel	strType	strImage	iRating	bCompilation	iTimesPlayed	strReleaseType	idAlbum	idArtist	strArtist	strMusicBrainzArtistID	boolFeatured	strJoinPhrase	iOrder
+1	strAlbum1	strMusicBrainzAlbumID1	strArtists1	strGenres1	2000	NULL	NULL	NULL	NULL	NULL	NULL	NULL	NULL	0	0	album	1	1	strArtist1	strMusicBrainzArtistID	0		0
+drop view v1,v2;
+drop table t1,t2,t3,t4;
 # -----------------------------------------------------------------
 # -- End of 10.0 tests.
 # -----------------------------------------------------------------

mysql-test/t/view.test

@@ -5489,6 +5489,119 @@ execute stmt;
 drop table t1, t2;
 drop view v3;
 
+--echo #
+--echo # MDEV-8525: mariadb 10.0.20 crashing when data is read by Kodi 
+--echo # media center (http://kodi.tv).
+--echo #
+
+CREATE TABLE `t1` (
+  `idSong` int(11) NOT NULL AUTO_INCREMENT,
+  `idAlbum` int(11) DEFAULT NULL,
+  `idPath` int(11) DEFAULT NULL,
+  `strArtists` text,
+  `strGenres` text,
+  `strTitle` varchar(512) DEFAULT NULL,
+  `iTrack` int(11) DEFAULT NULL,
+  `iDuration` int(11) DEFAULT NULL,
+  `iYear` int(11) DEFAULT NULL,
+  `dwFileNameCRC` text,
+  `strFileName` text,
+  `strMusicBrainzTrackID` text,
+  `iTimesPlayed` int(11) DEFAULT NULL,
+  `iStartOffset` int(11) DEFAULT NULL,
+  `iEndOffset` int(11) DEFAULT NULL,
+  `idThumb` int(11) DEFAULT NULL,
+  `lastplayed` varchar(20) DEFAULT NULL,
+  `rating` char(1) DEFAULT '0',
+  `comment` text,
+  `mood` text,
+  PRIMARY KEY (`idSong`),
+  UNIQUE KEY `idxSong7` (`idAlbum`,`strMusicBrainzTrackID`(36)),
+  KEY `idxSong` (`strTitle`(255)),
+  KEY `idxSong1` (`iTimesPlayed`),
+  KEY `idxSong2` (`lastplayed`),
+  KEY `idxSong3` (`idAlbum`),
+  KEY `idxSong6` (`idPath`,`strFileName`(255))
+)  DEFAULT CHARSET=utf8;
+
+INSERT INTO `t1` VALUES (1,1,1,'strArtists1','strGenres1','strTitle1',1,100,2000,NULL,'strFileName1','strMusicBrainzTrackID1',0,0,0,NULL,NULL,'0','',''),(2,2,2,'strArtists2','strGenres2','strTitle2',2,200,2001,NULL,'strFileName2','strMusicBrainzTrackID2',0,0,0,NULL,NULL,'0','','');
+
+CREATE TABLE `t2` (
+  `idAlbum` int(11) NOT NULL AUTO_INCREMENT,
+  `strAlbum` varchar(256) DEFAULT NULL,
+  `strMusicBrainzAlbumID` text,
+  `strArtists` text,
+  `strGenres` text,
+  `iYear` int(11) DEFAULT NULL,
+  `idThumb` int(11) DEFAULT NULL,
+  `bCompilation` int(11) NOT NULL DEFAULT '0',
+  `strMoods` text,
+  `strStyles` text,
+  `strThemes` text,
+  `strReview` text,
+  `strImage` text,
+  `strLabel` text,
+  `strType` text,
+  `iRating` int(11) DEFAULT NULL,
+  `lastScraped` varchar(20) DEFAULT NULL,
+  `dateAdded` varchar(20) DEFAULT NULL,
+  `strReleaseType` text,
+  PRIMARY KEY (`idAlbum`),
+  UNIQUE KEY `idxAlbum_2` (`strMusicBrainzAlbumID`(36)),
+  KEY `idxAlbum` (`strAlbum`(255)),
+  KEY `idxAlbum_1` (`bCompilation`)
+) DEFAULT CHARSET=utf8;
+
+INSERT INTO `t2` VALUES (1,'strAlbum1','strMusicBrainzAlbumID1','strArtists1','strGenres1',2000,NULL,0,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,'album');
+
+CREATE TABLE `t3` (
+  `idArtist` int(11) DEFAULT NULL,
+  `idAlbum` int(11) DEFAULT NULL,
+  `strJoinPhrase` text,
+  `boolFeatured` int(11) DEFAULT NULL,
+  `iOrder` int(11) DEFAULT NULL,
+  `strArtist` text,
+  UNIQUE KEY `idxAlbumArtist_1` (`idAlbum`,`idArtist`),
+  UNIQUE KEY `idxAlbumArtist_2` (`idArtist`,`idAlbum`),
+  KEY `idxAlbumArtist_3` (`boolFeatured`)
+) DEFAULT CHARSET=utf8;
+
+INSERT INTO `t3` VALUES (1,1,'',0,0,'strArtist1');
+
+CREATE TABLE `t4` (
+  `idArtist` int(11) NOT NULL AUTO_INCREMENT,
+  `strArtist` varchar(256) DEFAULT NULL,
+  `strMusicBrainzArtistID` text,
+  `strBorn` text,
+  `strFormed` text,
+  `strGenres` text,
+  `strMoods` text,
+  `strStyles` text,
+  `strInstruments` text,
+  `strBiography` text,
+  `strDied` text,
+  `strDisbanded` text,
+  `strYearsActive` text,
+  `strImage` text,
+  `strFanart` text,
+  `lastScraped` varchar(20) DEFAULT NULL,
+  `dateAdded` varchar(20) DEFAULT NULL,
+  PRIMARY KEY (`idArtist`),
+  UNIQUE KEY `idxArtist1` (`strMusicBrainzArtistID`(36)),
+  KEY `idxArtist` (`strArtist`(255))
+) DEFAULT CHARSET=utf8;
+
+INSERT INTO `t4` VALUES (1,'strArtist1','strMusicBrainzArtistID',NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL);
+
+CREATE VIEW `v1` AS select `t2`.`idAlbum` AS `idAlbum`,`t2`.`strAlbum` AS `strAlbum`,`t2`.`strMusicBrainzAlbumID` AS `strMusicBrainzAlbumID`,`t2`.`strArtists` AS `strArtists`,`t2`.`strGenres` AS `strGenres`,`t2`.`iYear` AS `iYear`,`t2`.`strMoods` AS `strMoods`,`t2`.`strStyles` AS `strStyles`,`t2`.`strThemes` AS `strThemes`,`t2`.`strReview` AS `strReview`,`t2`.`strLabel` AS `strLabel`,`t2`.`strType` AS `strType`,`t2`.`strImage` AS `strImage`,`t2`.`iRating` AS `iRating`,`t2`.`bCompilation` AS `bCompilation`,(select min(`t1`.`iTimesPlayed`) from `t1` where (`t1`.`idAlbum` = `t2`.`idAlbum`)) AS `iTimesPlayed`,`t2`.`strReleaseType` AS `strReleaseType` from `t2`;
+
+CREATE VIEW `v2` AS select `t3`.`idAlbum` AS `idAlbum`,`t3`.`idArtist` AS `idArtist`,`t4`.`strArtist` AS `strArtist`,`t4`.`strMusicBrainzArtistID` AS `strMusicBrainzArtistID`,`t3`.`boolFeatured` AS `boolFeatured`,`t3`.`strJoinPhrase` AS `strJoinPhrase`,`t3`.`iOrder` AS `iOrder` from (`t3` join `t4` on((`t3`.`idArtist` = `t4`.`idArtist`)));
+
+SELECT v1.*,v2.* FROM v1 LEFT JOIN v2 ON v1.idAlbum = v2.idAlbum WHERE v1.idAlbum = 1 ORDER BY v2.iOrder;
+
+drop view v1,v2;
+drop table t1,t2,t3,t4;
+
 --echo # -----------------------------------------------------------------
 --echo # -- End of 10.0 tests.
 --echo # -----------------------------------------------------------------

sql/item.h

@@ -3770,6 +3770,8 @@ public:
   bool eq(const Item *item, bool binary_cmp) const;
   Item *get_tmp_table_item(THD *thd)
   {
+    if (const_item())
+      return copy_or_same(thd);
     Item *item= Item_ref::get_tmp_table_item(thd);
     item->name= name;
     return item;