MDEV-13577 slave_parallel_mode=optimistic should not report the mode's specific temporary errors

Revert 7bbe324fc1
Fix the bug differently (in log_event.cc)
Fix the test case to actually fail without the bug fix

include/my_sys.h

@@ -112,7 +112,6 @@ typedef struct my_aio_result {
 #define ME_JUST_INFO    1024    /**< not error but just info */
 #define ME_JUST_WARNING 2048    /**< not error but just warning */
 #define ME_FATALERROR   4096    /* Fatal statement error */
-#define ME_LOG_AS_WARN  8192    /* is error but error-logged as warning */
 
 	/* Bits in last argument to fn_format */
 #define MY_REPLACE_DIR		1	/* replace dir in name with 'dir' */

mysql-test/suite/rpl/r/rpl_parallel_optimistic.result

@@ -1,6 +1,4 @@
 include/rpl_init.inc [topology=1->2]
-call mtr.add_suppression("Warning.*Deadlock found when trying to get lock; try restarting transaction");
-call mtr.add_suppression("Warning.*mysqld: Can't find record in 't2'");
 ALTER TABLE mysql.gtid_slave_pos ENGINE=InnoDB;
 CREATE TABLE t1 (a int PRIMARY KEY, b INT) ENGINE=InnoDB;
 SET @old_parallel_threads=@@GLOBAL.slave_parallel_threads;
@@ -549,6 +547,7 @@ DELETE FROM t1;
 DELETE FROM t2;
 include/save_master_gtid.inc
 include/sync_with_master_gtid.inc
+set global log_warnings=2;
 BEGIN;
 INSERT INTO t1 SET a=1;
 SET @save.binlog_format=@@session.binlog_format;
@@ -567,6 +566,7 @@ DELETE FROM t2;
 include/save_master_gtid.inc
 include/sync_with_master_gtid.inc
 include/stop_slave.inc
+set global log_warnings=default;
 SET GLOBAL slave_parallel_mode=@old_parallel_mode;
 SET GLOBAL slave_parallel_threads=@old_parallel_threads;
 include/start_slave.inc

mysql-test/suite/rpl/t/rpl_parallel_optimistic.test

@@ -4,11 +4,6 @@
 --let $rpl_topology=1->2
 --source include/rpl_init.inc
 
---connection server_2
-call mtr.add_suppression("Warning.*Deadlock found when trying to get lock; try restarting transaction");
-# The following instruction is a part of the proof of MDEV-13577 fixes, below.
-call mtr.add_suppression("Warning.*mysqld: Can't find record in 't2'");
-
 --connection server_1
 ALTER TABLE mysql.gtid_slave_pos ENGINE=InnoDB;
 CREATE TABLE t1 (a int PRIMARY KEY, b INT) ENGINE=InnoDB;
@@ -500,6 +495,7 @@ DELETE FROM t2;
 
 # The 1st of the following two trx:s a blocker on slave
 --connection server_2
+set global log_warnings=2;
 BEGIN;
 INSERT INTO t1 SET a=1;
 
@@ -546,6 +542,7 @@ DELETE FROM t2;
 #
 --connection server_2
 --source include/stop_slave.inc
+set global log_warnings=default;
 SET GLOBAL slave_parallel_mode=@old_parallel_mode;
 SET GLOBAL slave_parallel_threads=@old_parallel_threads;
 --source include/start_slave.inc

sql/handler.cc

@@ -3639,13 +3639,10 @@ void handler::print_error(int error, myf errflag)
     if ((debug_assert_if_crashed_table ||
                       global_system_variables.log_warnings > 1))
     {
-      THD *thd= ha_thd();
       /*
         Log error to log before we crash or if extended warnings are requested
       */
       errflag|= ME_NOREFRESH;
-      if (thd && thd->is_optimistic_slave_worker())
-        errflag|= ME_LOG_AS_WARN;
     }
   }
 

sql/log_event.cc

@@ -12080,6 +12080,16 @@ void issue_long_find_row_warning(Log_event_type type,
 }
 
 
+/*
+  HA_ERR_KEY_NOT_FOUND is a fatal error normally, but it's an expected
+  error in speculate optimistic mode, so use something non-fatal instead
+*/
+static int row_not_found_error(rpl_group_info *rgi)
+{
+  return rgi->speculation != rpl_group_info::SPECULATE_OPTIMISTIC
+         ? HA_ERR_KEY_NOT_FOUND : HA_ERR_RECORD_CHANGED;
+}
+
 /**
   Locate the current row in event's table.
 
@@ -12167,8 +12177,8 @@ int Rows_log_event::find_row(rpl_group_info *rgi)
     if (error)
     {
       DBUG_PRINT("info",("rnd_pos returns error %d",error));
-      if (error == HA_ERR_RECORD_DELETED)
+      if (error == HA_ERR_RECORD_DELETED || error == HA_ERR_KEY_NOT_FOUND)
-        error= HA_ERR_KEY_NOT_FOUND;
+        error= row_not_found_error(rgi);
       table->file->print_error(error, MYF(0));
     }
     DBUG_RETURN(error);
@@ -12233,8 +12243,8 @@ int Rows_log_event::find_row(rpl_group_info *rgi)
                                                HA_READ_KEY_EXACT)))
     {
       DBUG_PRINT("info",("no record matching the key found in the table"));
-      if (error == HA_ERR_RECORD_DELETED)
+      if (error == HA_ERR_RECORD_DELETED || error == HA_ERR_KEY_NOT_FOUND)
-        error= HA_ERR_KEY_NOT_FOUND;
+        error= row_not_found_error(rgi);
       table->file->print_error(error, MYF(0));
       table->file->ha_index_end();
       goto end;

sql/mysqld.cc

@@ -3517,16 +3517,6 @@ void my_message_sql(uint error, const char *str, myf MyFlags)
     level= Sql_condition::WARN_LEVEL_WARN;
     func= sql_print_warning;
   }
-  else if (MyFlags & ME_LOG_AS_WARN)
-  {
-    /*
-      Typical use case is optimistic parallel slave where DA needs to hold
-      an error condition caused by the current error, but the error-log
-      level is relaxed to the warning one.
-    */
-    level= Sql_condition::WARN_LEVEL_ERROR;
-    func= sql_print_warning;
-  }
   else
   {
     level= Sql_condition::WARN_LEVEL_ERROR;

sql/sql_class.cc

@@ -7003,13 +7003,6 @@ bool THD::rgi_have_temporary_tables()
   return rgi_slave->rli->save_temporary_tables != 0;
 }
 
-bool THD::is_optimistic_slave_worker()
-{
-  DBUG_ASSERT(system_thread != SYSTEM_THREAD_SLAVE_SQL || rgi_slave);
-
-  return system_thread == SYSTEM_THREAD_SLAVE_SQL && rgi_slave &&
-    rgi_slave->speculation == rpl_group_info::SPECULATE_OPTIMISTIC;
-}
 
 void
 wait_for_commit::reinit()

sql/sql_class.h

@@ -4168,12 +4168,6 @@ public:
        (THD_TRANS::DID_WAIT | THD_TRANS::CREATED_TEMP_TABLE |
         THD_TRANS::DROPPED_TEMP_TABLE | THD_TRANS::DID_DDL));
   }
-
-  /*
-    Returns true when the thread handle belongs to a slave worker thread
-    running in the optimistic execution mode.
-  */
-  bool is_optimistic_slave_worker();
 };