MDEV-26053 : TRUNCATE on table with Foreign Key Constraint no longer replicated to other nodes

Problem was that there was extra condition !thd->lex->no_write_to_binlog
before call to begin TOI. It seems that this variable is not initialized.
TRUNCATE does not support [NO_WRITE_TO_BINLOG | LOCAL] keywords, thus
we should not check this condition. All this was hidden in a macro,
so I decided to remove those macros that were used only a few places
with actual function calls.

include/wsrep.h

@@ -23,8 +23,6 @@
 #define DBUG_ASSERT_IF_WSREP(A) DBUG_ASSERT(A)
 
 #define WSREP_MYSQL_DB (char *)"mysql"
-#define WSREP_TO_ISOLATION_BEGIN_IF(db_, table_, table_list_)                 \
-  if (WSREP_ON && WSREP(thd) && wsrep_to_isolation_begin(thd, db_, table_, table_list_))
 
 #define WSREP_TO_ISOLATION_BEGIN(db_, table_, table_list_)              \
   if (WSREP_ON && WSREP(thd) && wsrep_to_isolation_begin(thd, db_, table_, table_list_)) \
@@ -48,10 +46,6 @@
   if (WSREP(thd) && !thd->lex->no_write_to_binlog                                   \
          && wsrep_to_isolation_begin(thd, db_, table_, table_list_)) goto wsrep_error_label;
 
-#define WSREP_TO_ISOLATION_BEGIN_FK_TABLES(db_, table_, table_list_, fk_tables)    \
-  if (WSREP(thd) && !thd->lex->no_write_to_binlog                                   \
-      && wsrep_to_isolation_begin(thd, db_, table_, table_list_, NULL, fk_tables))
-
 #define WSREP_DEBUG(...)                                                \
     if (wsrep_debug)     WSREP_LOG(sql_print_information, ##__VA_ARGS__)
 #define WSREP_INFO(...)  WSREP_LOG(sql_print_information, ##__VA_ARGS__)
@@ -75,7 +69,6 @@
 #define WSREP_ERROR(...)
 #define WSREP_TO_ISOLATION_BEGIN(db_, table_, table_list_) do { } while(0)
 #define WSREP_TO_ISOLATION_BEGIN_ALTER(db_, table_, table_list_, alter_info_)
-#define WSREP_TO_ISOLATION_BEGIN_FK_TABLES(db_, table_, table_list_, fk_tables_)
 #define WSREP_TO_ISOLATION_END
 #define WSREP_TO_ISOLATION_BEGIN_WRTCHK(db_, table_, table_list_)
 #define WSREP_SYNC_WAIT(thd_, before_)

mysql-test/suite/galera/r/galera_fk_truncate.result

@@ -0,0 +1,47 @@
+connection node_2;
+connection node_1;
+CREATE TABLE author (
+id SMALLINT UNSIGNED NOT NULL AUTO_INCREMENT PRIMARY KEY,
+name VARCHAR(100) NOT NULL
+) ENGINE = InnoDB;
+CREATE TABLE book (
+id MEDIUMINT UNSIGNED NOT NULL AUTO_INCREMENT PRIMARY KEY,
+title VARCHAR(200) NOT NULL,
+author_id SMALLINT UNSIGNED NOT NULL,
+CONSTRAINT `fk_book_author`
+    FOREIGN KEY (author_id) REFERENCES author (id)
+ON DELETE CASCADE
+ON UPDATE RESTRICT
+) ENGINE = InnoDB;
+INSERT INTO author (name) VALUES ('Abdul Alhazred');
+INSERT INTO book (title, author_id) VALUES ('Necronomicon', LAST_INSERT_ID());
+TRUNCATE TABLE book;
+SELECT * FROM author;
+id	name
+1	Abdul Alhazred
+SELECT * FROM book;
+id	title	author_id
+connection node_2;
+SELECT * FROM author;
+id	name
+1	Abdul Alhazred
+SELECT * FROM book;
+id	title	author_id
+INSERT INTO author (name) VALUES ('Abdul Alhazred');
+INSERT INTO book (title, author_id) VALUES ('Necronomicon', LAST_INSERT_ID());
+TRUNCATE TABLE book;
+SELECT * FROM author;
+id	name
+1	Abdul Alhazred
+2	Abdul Alhazred
+SELECT * FROM book;
+id	title	author_id
+connection node_1;
+TRUNCATE TABLE book;
+SELECT * FROM author;
+id	name
+1	Abdul Alhazred
+2	Abdul Alhazred
+SELECT * FROM book;
+id	title	author_id
+DROP TABLE book, author;

mysql-test/suite/galera/t/galera_fk_truncate.test

@@ -0,0 +1,39 @@
+--source include/galera_cluster.inc
+
+CREATE TABLE author (
+  id SMALLINT UNSIGNED NOT NULL AUTO_INCREMENT PRIMARY KEY,
+  name VARCHAR(100) NOT NULL
+) ENGINE = InnoDB;
+
+CREATE TABLE book (
+  id MEDIUMINT UNSIGNED NOT NULL AUTO_INCREMENT PRIMARY KEY,
+  title VARCHAR(200) NOT NULL,
+  author_id SMALLINT UNSIGNED NOT NULL,
+  CONSTRAINT `fk_book_author`
+    FOREIGN KEY (author_id) REFERENCES author (id)
+    ON DELETE CASCADE
+    ON UPDATE RESTRICT
+) ENGINE = InnoDB;
+
+INSERT INTO author (name) VALUES ('Abdul Alhazred');
+INSERT INTO book (title, author_id) VALUES ('Necronomicon', LAST_INSERT_ID());
+
+TRUNCATE TABLE book;
+SELECT * FROM author;
+SELECT * FROM book;
+
+--connection node_2
+SELECT * FROM author;
+SELECT * FROM book;
+INSERT INTO author (name) VALUES ('Abdul Alhazred');
+INSERT INTO book (title, author_id) VALUES ('Necronomicon', LAST_INSERT_ID());
+TRUNCATE TABLE book;
+SELECT * FROM author;
+SELECT * FROM book;
+
+--connection node_1
+TRUNCATE TABLE book;
+SELECT * FROM author;
+SELECT * FROM book;
+
+DROP TABLE book, author;

sql/sql_admin.cc

@@ -466,16 +466,17 @@ static bool wsrep_toi_replication(THD *thd, TABLE_LIST *tables)
   /* now TOI replication, with no locks held */
   if (keys.empty())
   {
-    WSREP_TO_ISOLATION_BEGIN_WRTCHK(NULL, NULL, tables);
-  } else {
-    WSREP_TO_ISOLATION_BEGIN_FK_TABLES(NULL, NULL, tables, &keys) {
+    if (!thd->lex->no_write_to_binlog &&
+	wsrep_to_isolation_begin(thd, NULL, NULL, tables))
+      return true;
+  }
+  else
+  {
+    if (!thd->lex->no_write_to_binlog &&
+	wsrep_to_isolation_begin(thd, NULL, NULL, tables, NULL, &keys))
       return true;
-    }
   }
   return false;
-
- wsrep_error_label:
-  return true;
 }
 #endif /* WITH_WSREP */
 

sql/sql_truncate.cc

@@ -424,15 +424,13 @@ bool Sql_cmd_truncate_table::truncate_table(THD *thd, TABLE_LIST *table_ref)
       {
         if (keys.empty())
         {
-          WSREP_TO_ISOLATION_BEGIN_IF(table_ref->db.str, table_ref->table_name.str, NULL)
-          {
+          if (wsrep_to_isolation_begin(thd, table_ref->db.str, table_ref->table_name.str, NULL))
             DBUG_RETURN(TRUE);
-          }
-        } else {
-          WSREP_TO_ISOLATION_BEGIN_FK_TABLES(NULL, NULL, table_ref, &keys)
-          {
+        }
+        else
+        {
+          if (wsrep_to_isolation_begin(thd, NULL, NULL, table_ref, NULL, &keys))
             DBUG_RETURN(TRUE);
-          }
         }
       }
     }

sql/wsrep_mysqld.cc

@@ -2164,8 +2164,9 @@ int wsrep_to_isolation_begin(THD *thd, const char *db_, const char *table_,
 {
   /*
     No isolation for applier or replaying threads.
-   */
-  if (!wsrep_thd_is_local(thd)) return 0;
+  */
+  if (!wsrep_thd_is_local(thd))
+    return 0;
 
   int ret= 0;
   mysql_mutex_lock(&thd->LOCK_thd_data);