MDEV-13005: Fixing bugs in SEQUENCE, part 3, 5/5

Task 6:
We can find the .frm type of file. If it is sequence then is_sequence
passed to dd_frm_type() will be true. Since there is already a check
to give error message if we trigger is on temporary table or view, an
additional condition is added to check if .frm is sequence
(is_sequence==true) and error message is changed to show
"Trigger's '%-.192s' is view, temporary table or sequence" instead of
"Trigger's '%-.192s' is view or temporary table".

mysql-test/main/trigger.result

@@ -319,7 +319,7 @@ drop table t1;
 drop table t3;
 create temporary table t1 (i int);
 create trigger trg before insert on t1 for each row set @a:=1;
-ERROR HY000: Trigger's 't1' is view or temporary table
+ERROR HY000: Trigger's 't1' is view, temporary table or sequence
 drop table t1;
 create table t1 (x1col char);
 create trigger tx1 before insert on t1 for each row set new.x1col = 'x';

mysql-test/suite/funcs_1/r/innodb_trig_0407.result

@@ -237,7 +237,7 @@ Testcase 3.5.5.2:
 Create temporary table t1_temp (f1 bigint signed, f2 bigint unsigned);
 Create trigger trg2 before INSERT
 on t1_temp for each row set new.f2=9999;
-ERROR HY000: Trigger's 't1_temp' is view or temporary table
+ERROR HY000: Trigger's 't1_temp' is view, temporary table or sequence
 drop table t1_temp;
 
 Testcase 3.5.5.3:

mysql-test/suite/funcs_1/r/memory_trig_0407.result

@@ -237,7 +237,7 @@ Testcase 3.5.5.2:
 Create temporary table t1_temp (f1 bigint signed, f2 bigint unsigned);
 Create trigger trg2 before INSERT
 on t1_temp for each row set new.f2=9999;
-ERROR HY000: Trigger's 't1_temp' is view or temporary table
+ERROR HY000: Trigger's 't1_temp' is view, temporary table or sequence
 drop table t1_temp;
 
 Testcase 3.5.5.3:

mysql-test/suite/funcs_1/r/myisam_trig_0407.result

@@ -237,7 +237,7 @@ Testcase 3.5.5.2:
 Create temporary table t1_temp (f1 bigint signed, f2 bigint unsigned);
 Create trigger trg2 before INSERT
 on t1_temp for each row set new.f2=9999;
-ERROR HY000: Trigger's 't1_temp' is view or temporary table
+ERROR HY000: Trigger's 't1_temp' is view, temporary table or sequence
 drop table t1_temp;
 
 Testcase 3.5.5.3:

mysql-test/suite/sql_sequence/create.result

@@ -711,3 +711,9 @@ CREATE TEMPORARY TABLE s1 (s1 INT);
 CREATE TEMPORARY SEQUENCE s1 (s1 INT);
 ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near '(s1 INT)' at line 1
 DROP TEMPORARY TABLE s1;
+# Task 6:
+CREATE SEQUENCE seq1 START WITH 2;
+CREATE TRIGGER s1 BEFORE UPDATE ON seq1 FOR EACH ROW SET @a= 5;
+ERROR HY000: Trigger's 'seq1' is view, temporary table or sequence
+DROP SEQUENCE seq1;
+# End of 10.4 test

mysql-test/suite/sql_sequence/create.test

@@ -545,3 +545,11 @@ CREATE TEMPORARY TABLE s1 (s1 INT);
 --error ER_PARSE_ERROR
 CREATE TEMPORARY SEQUENCE s1 (s1 INT);
 DROP TEMPORARY TABLE s1;
+
+--echo # Task 6:
+CREATE SEQUENCE seq1 START WITH 2;
+--error ER_TRG_ON_VIEW_OR_TEMP_TABLE
+CREATE TRIGGER s1 BEFORE UPDATE ON seq1 FOR EACH ROW SET @a= 5;
+DROP SEQUENCE seq1;
+
+--echo # End of 10.4 test

sql/share/errmsg-utf8.txt

@@ -5421,8 +5421,8 @@ ER_TRG_DOES_NOT_EXIST
         ger "Trigger existiert nicht"
         hindi "TRIGGER मौजूद नहीं है"
 ER_TRG_ON_VIEW_OR_TEMP_TABLE  
-        eng "Trigger's '%-.192s' is view or temporary table"
-        ger "'%-.192s' des Triggers ist View oder temporäre Tabelle"
+        eng "Trigger's '%-.192s' is view, temporary table or sequence"
+        hindi "'%-.192s' एक व्यू, टेम्पररी टेबल या सीक्वेंस है"
 ER_TRG_CANT_CHANGE_ROW  
         eng "Updating of %s row is not allowed in %strigger"
         ger "Aktualisieren einer %s-Zeile ist in einem %s-Trigger nicht erlaubt"

sql/sql_trigger.cc

@@ -413,6 +413,11 @@ bool mysql_create_or_drop_trigger(THD *thd, TABLE_LIST *tables, bool create)
   bool lock_upgrade_done= FALSE;
   MDL_ticket *mdl_ticket= NULL;
   Query_tables_list backup;
+   char path[FN_REFLEN + 1];
+  char engine_name_buf[NAME_CHAR_LEN + 1];
+  LEX_CSTRING engine_name= { engine_name_buf, 0 };
+  bool is_sequence= 0;
+  
   DBUG_ENTER("mysql_create_or_drop_trigger");
 
   /* Charset of the buffer for statement must be system one. */
@@ -529,8 +534,11 @@ bool mysql_create_or_drop_trigger(THD *thd, TABLE_LIST *tables, bool create)
   /* We should have only one table in table list. */
   DBUG_ASSERT(tables->next_global == 0);
 
-  /* We do not allow creation of triggers on temporary tables. */
-  if (create && thd->find_tmp_table_share(tables))
+  build_table_filename(path, sizeof(path) - 1, tables->db.str, tables->alias.str, ".frm", 0);
+  tables->required_type= dd_frm_type(NULL, path, &engine_name, &is_sequence);
+
+  /* We do not allow creation of triggers on temporary tables or sequence. */
+  if (is_sequence || (create && thd->find_tmp_table_share(tables)))
   {
     my_error(ER_TRG_ON_VIEW_OR_TEMP_TABLE, MYF(0), tables->alias.str);
     goto end;