MDEV-16437: merge 5.7 P_S replication instrumentation and tables

Merge 'replication_applier_configuration' table.

This table captures SQL_THREAD configuration parameters.

Replaced following column:
  - CHANNEL_NAME with CONNECTION_NAME

mysql-test/suite/perfschema/r/information_schema.result

@@ -228,7 +228,7 @@ mutex_instances	10	Dynamic
 objects_summary_global_by_type	10	Dynamic
 performance_timers	10	Fixed
 prepared_statements_instances	10	Dynamic
-replication_applier_configuration	10	Fixed
+replication_applier_configuration	10	Dynamic
 replication_applier_status	10	Fixed
 replication_applier_status_by_coordinator	10	Dynamic
 replication_applier_status_by_worker	10	Dynamic

mysql-test/suite/perfschema/r/table_schema.result

@@ -853,7 +853,7 @@ def	performance_schema	prepared_statements_instances	SUM_SORT_ROWS	32	NULL	NO	bi
 def	performance_schema	prepared_statements_instances	SUM_SORT_SCAN	33	NULL	NO	bigint	NULL	NULL	20	0	NULL	NULL	NULL	bigint(20) unsigned			select,insert,update,references		NEVER	NULL
 def	performance_schema	prepared_statements_instances	SUM_NO_INDEX_USED	34	NULL	NO	bigint	NULL	NULL	20	0	NULL	NULL	NULL	bigint(20) unsigned			select,insert,update,references		NEVER	NULL
 def	performance_schema	prepared_statements_instances	SUM_NO_GOOD_INDEX_USED	35	NULL	NO	bigint	NULL	NULL	20	0	NULL	NULL	NULL	bigint(20) unsigned			select,insert,update,references		NEVER	NULL
-def	performance_schema	replication_applier_configuration	CHANNEL_NAME	1	NULL	NO	char	64	192	NULL	NULL	NULL	utf8	utf8_general_ci	char(64)			select,insert,update,references		NEVER	NULL
+def	performance_schema	replication_applier_configuration	CONNECTION_NAME	1	NULL	NO	varchar	256	768	NULL	NULL	NULL	utf8	utf8_general_ci	varchar(256)			select,insert,update,references		NEVER	NULL
 def	performance_schema	replication_applier_configuration	DESIRED_DELAY	2	NULL	NO	int	NULL	NULL	10	0	NULL	NULL	NULL	int(11)			select,insert,update,references		NEVER	NULL
 def	performance_schema	replication_applier_status	CHANNEL_NAME	1	NULL	NO	char	64	192	NULL	NULL	NULL	utf8	utf8_general_ci	char(64)			select,insert,update,references		NEVER	NULL
 def	performance_schema	replication_applier_status	SERVICE_STATE	2	NULL	NO	enum	3	9	NULL	NULL	NULL	utf8	utf8_general_ci	enum('ON','OFF')			select,insert,update,references		NEVER	NULL

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

+include/master-slave.inc
+[connection master]
+include/assert.inc [On master, the table should return an empty set.]
+connection slave;
+
+# Verify that SELECT works and produces an output similar to
+# the corresponding field in SHOW SLAVE STATUS(SSS) in all scenarios.
+
+
+# Verify that output is same as SSS on a fresh slave.
+
+include/assert.inc [Value returned by SSS and PS table for Desired_Delay should be same.]
+
+# Verify that the value of this field is correct after STOP SLAVE.
+
+include/stop_slave.inc
+include/assert.inc [Value returned by SSS and PS table for Desired_Delay should be same.]
+
+# Verify that, when desired delay is set, the value is shown corectly.
+
+change master to master_delay= 2;
+include/start_slave.inc
+include/assert.inc [Value returned by SSS and PS table for Desired_Delay should be same.]
+
+# Verify that the value is preserved after STOP SLAVE.
+
+include/stop_slave.inc
+include/assert.inc [Value returned by SSS and PS table for Desired_Delay should be same.]
+
+# Verify that, when desired delay is reset, the value is shown corectly.
+
+change master to master_delay= 0;
+include/start_slave.inc
+include/assert.inc [Value returned by SSS and PS table for Desired_Delay should be same.]
+include/rpl_end.inc

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

+# ==== Purpose ====
+#
+# This test script serves as the functionality testing for the table
+# performance_schema.replication_applier_configuration. Test for ddl and dml
+# operations is a part of the perfschema suite. The ddl/dml tests are named:
+# 1) ddl_replication_applier_configuration.test and
+# 2) dml_replication_applier_configuration.test.
+#
+# The follwing scenarios are tested in this script:
+#
+#  - Verify that output is same as SSS on a fresh slave.
+#  - Verify that the value of this field is correct after STOP SLAVE.
+#  - Verify that, when desired delay is set, the value is shown corectly.
+#  - Verify that the value is preserved after STOP SLAVE.
+#  - Verify that, when desired delay is reset, the value is shown corectly.
+#
+#  ==== Related Worklog ====
+#
+#  MDEV-16437: merge 5.7 P_S replication instrumentation and tables
+#
+
+source include/master-slave.inc;
+source include/have_binlog_format_mixed.inc;
+
+let $assert_text= On master, the table should return an empty set.;
+let $assert_cond= count(*) = 0 from performance_schema.replication_applier_configuration;
+source include/assert.inc;
+
+--connection slave
+
+--echo
+--echo # Verify that SELECT works and produces an output similar to
+--echo # the corresponding field in SHOW SLAVE STATUS(SSS) in all scenarios.
+--echo
+
+--echo
+--echo # Verify that output is same as SSS on a fresh slave.
+--echo
+
+let $sss_value= query_get_value(SHOW SLAVE STATUS, SQL_Delay, 1);
+let $ps_value= query_get_value(select Desired_Delay from performance_schema.replication_applier_configuration, Desired_Delay, 1);
+let $assert_text= Value returned by SSS and PS table for Desired_Delay should be same.;
+let $assert_cond= "$sss_value" = "$ps_value";
+source include/assert.inc;
+
+--echo
+--echo # Verify that the value of this field is correct after STOP SLAVE.
+--echo
+
+source include/stop_slave.inc;
+
+let $sss_value= query_get_value(SHOW SLAVE STATUS, SQL_Delay, 1);
+let $ps_value= query_get_value(select Desired_Delay from performance_schema.replication_applier_configuration, Desired_Delay, 1);
+let $assert_text= Value returned by SSS and PS table for Desired_Delay should be same.;
+let $assert_cond= "$sss_value" = "$ps_value";
+source include/assert.inc;
+
+--echo
+--echo # Verify that, when desired delay is set, the value is shown corectly.
+--echo
+
+eval change master to master_delay= 2;
+source include/start_slave.inc;
+
+let $sss_value= query_get_value(SHOW SLAVE STATUS, SQL_Delay, 1);
+let $ps_value= query_get_value(select Desired_Delay from performance_schema.replication_applier_configuration, Desired_Delay, 1);
+let $assert_text= Value returned by SSS and PS table for Desired_Delay should be same.;
+let $assert_cond= "$sss_value" = "$ps_value";
+source include/assert.inc;
+
+--echo
+--echo # Verify that the value is preserved after STOP SLAVE.
+--echo
+
+source include/stop_slave.inc;
+
+let $ss_value= query_get_value(SHOW SLAVE STATUS, SQL_Delay, 1);
+let $ps_value= query_get_value(select Desired_Delay from performance_schema.replication_applier_configuration, Desired_Delay, 1);
+let $assert_text= Value returned by SSS and PS table for Desired_Delay should be same.;
+let $assert_cond= "$sss_value" = "$ps_value";
+source include/assert.inc;
+
+--echo
+--echo # Verify that, when desired delay is reset, the value is shown corectly.
+--echo
+
+eval change master to master_delay= 0;
+source include/start_slave.inc;
+
+let $sss_value= query_get_value(SHOW SLAVE STATUS, SQL_Delay, 1);
+let $ps_value= query_get_value(select Desired_Delay from performance_schema.replication_applier_configuration, Desired_Delay, 1);
+let $assert_text= Value returned by SSS and PS table for Desired_Delay should be same.;
+let $assert_cond= "$sss_value" = "$ps_value";
+source include/assert.inc;
+
+source include/rpl_end.inc;

storage/perfschema/table_replication_applier_configuration.cc

@@ -29,17 +29,15 @@
 //#define HAVE_REPLICATION
 
 #include "my_global.h"
+#ifdef HAVE_REPLICATION
 #include "table_replication_applier_configuration.h"
 #include "pfs_instr_class.h"
 #include "pfs_instr.h"
 #include "slave.h"
-//#include "rpl_info.h"
 #include "rpl_rli.h"
 #include "rpl_mi.h"
 #include "sql_parse.h"
-//#include "rpl_msr.h"   /* Multisource replication */
 
-#ifdef HAVE_REPLICATION
 THR_LOCK table_replication_applier_configuration::m_table_lock;
 
 PFS_engine_table_share
@@ -54,7 +52,7 @@ table_replication_applier_configuration::m_share=
   sizeof(pos_t), /* ref length */
   &m_table_lock,
   { C_STRING_WITH_LEN("CREATE TABLE replication_applier_configuration("
-  "CHANNEL_NAME CHAR(64) collate utf8_general_ci not null,"
+  "CONNECTION_NAME VARCHAR(256) collate utf8_general_ci not null,"
   "DESIRED_DELAY INTEGER not null)") },
   false  /* perpetual */
 };
@@ -139,9 +137,9 @@ void table_replication_applier_configuration::make_row(Master_info *mi)
   mysql_mutex_lock(&mi->data_lock);
   mysql_mutex_lock(&mi->rli.data_lock);
 
-  m_row.channel_name_length= static_cast<uint>(mi->connection_name.length);
-  memcpy(m_row.channel_name, mi->connection_name.str, m_row.channel_name_length);
-  m_row.desired_delay= 0; //mi->rli->get_sql_delay();
+  m_row.connection_name_length= static_cast<uint>(mi->connection_name.length);
+  memcpy(m_row.connection_name, mi->connection_name.str, m_row.connection_name_length);
+  m_row.desired_delay= mi->rli.get_sql_delay();
 
   mysql_mutex_unlock(&mi->rli.data_lock);
   mysql_mutex_unlock(&mi->data_lock);
@@ -159,18 +157,7 @@ int table_replication_applier_configuration::read_row_values(TABLE *table,
   if (unlikely(! m_row_exists))
     return HA_ERR_RECORD_DELETED;
 
-  /*
-    Note:
-    There are no NULL columns in this table,
-    so there are no null bits reserved for NULL flags per column.
-    There are no VARCHAR columns either, so the record is not
-    in HA_OPTION_PACK_RECORD format as most other performance_schema tables.
-    When HA_OPTION_PACK_RECORD is not set,
-    the table record reserves an extra null byte, see open_binary_frm().
-  */
-
-  DBUG_ASSERT(table->s->null_bytes == 1);
-  buf[0]= 0;
+  DBUG_ASSERT(table->s->null_bytes == 0);
 
   for (; (f= *fields) ; fields++)
   {
@@ -178,10 +165,10 @@ int table_replication_applier_configuration::read_row_values(TABLE *table,
     {
       switch(f->field_index)
       {
-      case 0: /**channel_name*/
-        set_field_char_utf8(f, m_row.channel_name, m_row.channel_name_length);
+      case 0: /* connection_name */
+        set_field_varchar_utf8(f, m_row.connection_name, m_row.connection_name_length);
         break;
-      case 1: /** desired_delay */
+      case 1: /* desired_delay */
         set_field_ulong(f, static_cast<ulong>(m_row.desired_delay));
         break;
       default:

storage/perfschema/table_replication_applier_configuration.h

@@ -35,8 +35,6 @@
 #include "rpl_mi.h"
 #include "mysql_com.h"
 #include "my_thread.h"
-//#include "rpl_msr.h"
-//#include "rpl_info.h"  /*CHANNEL_NAME_LENGTH*/
 
 class Master_info;
 
@@ -47,8 +45,8 @@ class Master_info;
 
 /** A row in the table*/
 struct st_row_applier_config {
-  char channel_name[CHANNEL_NAME_LENGTH];
-  uint channel_name_length;
+  char connection_name[CHANNEL_NAME_LENGTH];
+  uint connection_name_length;
   time_t desired_delay;
   bool desired_delay_is_set;
 };