add ability to track per-database applied hlc (facebook#1113) (facebo…

…ok#1113)

Summary:
Adds the ability in HybridLogicalClock to maintain per-database applied HLC. The
feature is guarded by a new sysvar 'maintain_database_hlc'.

The database name is extracted from all Table_map_log_event or Query_log_event
in a trx and stored as a set in THD. This gives a list of all databases touched
by this trx. After engine commit, the HLC of the trx is updated as
'applied_hlc' for every database touched by the trx.

We track the per-database applied_hlc as a map (with the key as the database
name and value as applied hlc) per instance.

Per-database applied HLC is exposed as a information schema table
'database_applied_hlc'. On querying this table, we get the map of per-database
applied hlc and populate the result set.

Reference Patch: facebook@b90a327

8.0 porting notes:
* 'sys_vars.maintain_database_hlc_basic' MTR test case expanded and
   unified.

Pull Request resolved: facebook#1113

Reviewed By: luqun

Differential Revision: D20131111

Pulled By: bhatvinay

mysql-test/r/dd_is_compatibility_ci.result

@@ -164,6 +164,7 @@ COLUMNS
 COLUMNS_EXTENSIONS
 COLUMN_PRIVILEGES
 COLUMN_STATISTICS
+DATABASE_APPLIED_HLC
 ENABLED_ROLES
 ENGINES
 EVENTS

mysql-test/r/dd_is_compatibility_cs.result

@@ -164,6 +164,7 @@ COLUMNS
 COLUMNS_EXTENSIONS
 COLUMN_PRIVILEGES
 COLUMN_STATISTICS
+DATABASE_APPLIED_HLC
 ENABLED_ROLES
 ENGINES
 EVENTS

mysql-test/r/information_schema_ci.result

@@ -72,6 +72,7 @@ COLUMNS
 COLUMNS_EXTENSIONS
 COLUMN_PRIVILEGES
 COLUMN_STATISTICS
+DATABASE_APPLIED_HLC
 ENABLED_ROLES
 ENGINES
 EVENTS
@@ -904,7 +905,7 @@ AND table_name COLLATE utf8_general_ci not like 'innodb_%'
 AND table_name COLLATE utf8_general_ci not like 'rocksdb_%'
 GROUP BY TABLE_SCHEMA;
 TABLE_SCHEMA	count(*)
-information_schema	51
+information_schema	52
 mysql	35
 create table t1 (i int, j int);
 create trigger trg1 before insert on t1 for each row
@@ -2510,6 +2511,7 @@ COLUMNS	TABLE_SCHEMA
 COLUMNS_EXTENSIONS	TABLE_SCHEMA
 COLUMN_PRIVILEGES	TABLE_SCHEMA
 COLUMN_STATISTICS	SCHEMA_NAME
+DATABASE_APPLIED_HLC	DATABASE_NAME
 ENABLED_ROLES	ROLE_NAME
 ENGINES	ENGINE
 EVENTS	EVENT_SCHEMA
@@ -2581,6 +2583,7 @@ COLUMNS	TABLE_SCHEMA
 COLUMNS_EXTENSIONS	TABLE_SCHEMA
 COLUMN_PRIVILEGES	TABLE_SCHEMA
 COLUMN_STATISTICS	SCHEMA_NAME
+DATABASE_APPLIED_HLC	DATABASE_NAME
 ENABLED_ROLES	ROLE_NAME
 ENGINES	ENGINE
 EVENTS	EVENT_SCHEMA

mysql-test/r/information_schema_cs.result

@@ -72,6 +72,7 @@ COLUMNS
 COLUMNS_EXTENSIONS
 COLUMN_PRIVILEGES
 COLUMN_STATISTICS
+DATABASE_APPLIED_HLC
 ENABLED_ROLES
 ENGINES
 EVENTS
@@ -904,7 +905,7 @@ AND table_name COLLATE utf8_general_ci not like 'innodb_%'
 AND table_name COLLATE utf8_general_ci not like 'rocksdb_%'
 GROUP BY TABLE_SCHEMA;
 TABLE_SCHEMA	count(*)
-information_schema	51
+information_schema	52
 mysql	35
 create table t1 (i int, j int);
 create trigger trg1 before insert on t1 for each row
@@ -2510,6 +2511,7 @@ COLUMNS	TABLE_SCHEMA
 COLUMNS_EXTENSIONS	TABLE_SCHEMA
 COLUMN_PRIVILEGES	TABLE_SCHEMA
 COLUMN_STATISTICS	SCHEMA_NAME
+DATABASE_APPLIED_HLC	DATABASE_NAME
 ENABLED_ROLES	ROLE_NAME
 ENGINES	ENGINE
 EVENTS	EVENT_SCHEMA
@@ -2581,6 +2583,7 @@ COLUMNS	TABLE_SCHEMA
 COLUMNS_EXTENSIONS	TABLE_SCHEMA
 COLUMN_PRIVILEGES	TABLE_SCHEMA
 COLUMN_STATISTICS	SCHEMA_NAME
+DATABASE_APPLIED_HLC	DATABASE_NAME
 ENABLED_ROLES	ROLE_NAME
 ENGINES	ENGINE
 EVENTS	EVENT_SCHEMA

mysql-test/r/mysqld--help-notwin.result

@@ -726,6 +726,8 @@ The following options may be given as the first argument:
  If set to 1 table names are stored in lowercase on disk
  and table names will be case-insensitive.  Should be set
  to 2 if you are using a case insensitive file system
+ --maintain-database-hlc 
+ Enable maintaining of max HLC applied per database
  --mandatory-roles=name 
  All the specified roles are always considered granted to
  every user and they can't be revoked. Mandatory roles
@@ -2603,6 +2605,7 @@ log-timestamps UTC
 long-query-time 10
 low-priority-updates FALSE
 lower-case-table-names 1
+maintain-database-hlc FALSE
 mandatory-roles 
 master-info-file master.info
 master-info-repository TABLE

mysql-test/r/mysqld--help-win.result

@@ -644,6 +644,8 @@ The following options may be given as the first argument:
  If set to 1 table names are stored in lowercase on disk
  and table names will be case-insensitive.  Should be set
  to 2 if you are using a case insensitive file system
+ --maintain-database-hlc 
+ Enable maintaining of max HLC applied per database
  --mandatory-roles=name 
  All the specified roles are always considered granted to
  every user and they can't be revoked. Mandatory roles
@@ -1820,6 +1822,7 @@ log-timestamps UTC
 long-query-time 10
 low-priority-updates FALSE
 lower-case-table-names 1
+maintain-database-hlc FALSE
 mandatory-roles 
 master-info-file master.info
 master-info-repository TABLE

mysql-test/r/mysqlshow_ci.result

@@ -90,6 +90,7 @@ Database: information_schema
 | COLUMN_STATISTICS                     |
 | COLUMNS                               |
 | COLUMNS_EXTENSIONS                    |
+| DATABASE_APPLIED_HLC                  |
 | ENABLED_ROLES                         |
 | ENGINES                               |
 | EVENTS                                |
@@ -192,6 +193,7 @@ Database: INFORMATION_SCHEMA
 | COLUMN_STATISTICS                     |
 | COLUMNS                               |
 | COLUMNS_EXTENSIONS                    |
+| DATABASE_APPLIED_HLC                  |
 | ENABLED_ROLES                         |
 | ENGINES                               |
 | EVENTS                                |

mysql-test/r/mysqlshow_cs.result

@@ -90,6 +90,7 @@ Database: information_schema
 | COLUMNS_EXTENSIONS                    |
 | COLUMN_PRIVILEGES                     |
 | COLUMN_STATISTICS                     |
+| DATABASE_APPLIED_HLC                  |
 | ENABLED_ROLES                         |
 | ENGINES                               |
 | EVENTS                                |
@@ -193,6 +194,7 @@ Database: INFORMATION_SCHEMA
 | COLUMNS_EXTENSIONS                    |
 | COLUMN_PRIVILEGES                     |
 | COLUMN_STATISTICS                     |
+| DATABASE_APPLIED_HLC                  |
 | ENABLED_ROLES                         |
 | ENGINES                               |
 | EVENTS                                |

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

@@ -80,6 +80,8 @@ def	information_schema	COLUMN_STATISTICS	SCHEMA_NAME	1	NULL	NO	varchar	64	192	NU
 def	information_schema	COLUMN_STATISTICS	TABLE_NAME	2	NULL	NO	varchar	64	192	NULL	NULL	NULL	utf8mb3	utf8_bin	varchar(64)			select			NULL
 def	information_schema	COLUMN_STATISTICS	COLUMN_NAME	3	NULL	NO	varchar	64	192	NULL	NULL	NULL	utf8mb3	utf8_bin	varchar(64)			select			NULL
 def	information_schema	COLUMN_STATISTICS	HISTOGRAM	4	NULL	NO	json	NULL	NULL	NULL	NULL	NULL	NULL	NULL	json			select			NULL
+def	information_schema	DATABASE_APPLIED_HLC	DATABASE_NAME	1		NO	varchar	64	192	NULL	NULL	NULL	utf8	utf8_general_ci	varchar(192)			select			NULL
+def	information_schema	DATABASE_APPLIED_HLC	APPLIED_HLC	2		NO	bigint	NULL	NULL	NULL	NULL	NULL	NULL	NULL	bigint unsigned			select			NULL
 def	information_schema	ENABLED_ROLES	ROLE_NAME	1	NULL	YES	varchar	255	1020	NULL	NULL	NULL	utf8mb4	utf8mb4_0900_ai_ci	varchar(255)			select			NULL
 def	information_schema	ENABLED_ROLES	ROLE_HOST	2	NULL	YES	varchar	255	1020	NULL	NULL	NULL	utf8mb4	utf8mb4_0900_ai_ci	varchar(255)			select			NULL
 def	information_schema	ENABLED_ROLES	IS_DEFAULT	3	NULL	YES	varchar	3	9	NULL	NULL	NULL	utf8mb3	utf8mb3_general_ci	varchar(3)			select			NULL
@@ -736,6 +738,8 @@ NULL	information_schema	COLUMNS_EXTENSIONS	SECONDARY_ENGINE_ATTRIBUTE	json	NULL
 3.0000	information_schema	COLUMN_STATISTICS	TABLE_NAME	varchar	64	192	utf8mb3	utf8_bin	varchar(64)
 3.0000	information_schema	COLUMN_STATISTICS	COLUMN_NAME	varchar	64	192	utf8mb3	utf8_bin	varchar(64)
 NULL	information_schema	COLUMN_STATISTICS	HISTOGRAM	json	NULL	NULL	NULL	NULL	json
+3.0000	information_schema	DATABASE_APPLIED_HLC	DATABASE_NAME	varchar	64	192	utf8	utf8_general_ci	varchar(192)
+NULL	information_schema	DATABASE_APPLIED_HLC	APPLIED_HLC	bigint	NULL	NULL	NULL	NULL	bigint unsigned
 4.0000	information_schema	ENABLED_ROLES	ROLE_NAME	varchar	255	1020	utf8mb4	utf8mb4_0900_ai_ci	varchar(255)
 4.0000	information_schema	ENABLED_ROLES	ROLE_HOST	varchar	255	1020	utf8mb4	utf8mb4_0900_ai_ci	varchar(255)
 3.0000	information_schema	ENABLED_ROLES	IS_DEFAULT	varchar	3	9	utf8mb3	utf8mb3_general_ci	varchar(3)

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

@@ -85,6 +85,8 @@ def	information_schema	COLUMN_STATISTICS	SCHEMA_NAME	1	NULL	NO	varchar	64	192	NU
 def	information_schema	COLUMN_STATISTICS	TABLE_NAME	2	NULL	NO	varchar	64	192	NULL	NULL	NULL	utf8mb3	utf8mb3_bin	varchar(64)			select			NULL
 def	information_schema	COLUMN_STATISTICS	COLUMN_NAME	3	NULL	NO	varchar	64	192	NULL	NULL	NULL	utf8mb3	utf8_bin	varchar(64)			select			NULL
 def	information_schema	COLUMN_STATISTICS	HISTOGRAM	4	NULL	NO	json	NULL	NULL	NULL	NULL	NULL	NULL	NULL	json			select			NULL
+def	information_schema	DATABASE_APPLIED_HLC	DATABASE_NAME	1		NO	varchar	64	192	NULL	NULL	NULL	utf8mb3	utf8mb3_general_ci	varchar(192)			select			NULL
+def	information_schema	DATABASE_APPLIED_HLC	APPLIED_HLC	2		NO	bigint	NULL	NULL	NULL	NULL	NULL	NULL	NULL	bigint unsigned			select			NULL
 def	information_schema	ENABLED_ROLES	ROLE_NAME	1	NULL	YES	varchar	255	1020	NULL	NULL	NULL	utf8mb4	utf8mb4_0900_ai_ci	varchar(255)			select			NULL
 def	information_schema	ENABLED_ROLES	ROLE_HOST	2	NULL	YES	varchar	255	1020	NULL	NULL	NULL	utf8mb4	utf8mb4_0900_ai_ci	varchar(255)			select			NULL
 def	information_schema	ENABLED_ROLES	IS_DEFAULT	3	NULL	YES	varchar	3	9	NULL	NULL	NULL	utf8mb3	utf8mb3_general_ci	varchar(3)			select			NULL
@@ -759,6 +761,8 @@ NULL	information_schema	COLUMNS_EXTENSIONS	SECONDARY_ENGINE_ATTRIBUTE	json	NULL
 3.0000	information_schema	COLUMN_STATISTICS	TABLE_NAME	varchar	64	192	utf8mb3	utf8mb3_bin	varchar(64)
 3.0000	information_schema	COLUMN_STATISTICS	COLUMN_NAME	varchar	64	192	utf8mb3	utf8_bin	varchar(64)
 NULL	information_schema	COLUMN_STATISTICS	HISTOGRAM	json	NULL	NULL	NULL	NULL	json
+3.0000	information_schema	DATABASE_APPLIED_HLC	DATABASE_NAME	varchar	64	192	utf8mb3	utf8mb3_general_ci	varchar(192)
+NULL	information_schema	DATABASE_APPLIED_HLC	APPLIED_HLC	bigint	NULL	NULL	NULL	NULL	bigint unsigned
 4.0000	information_schema	ENABLED_ROLES	ROLE_NAME	varchar	255	1020	utf8mb4	utf8mb4_0900_ai_ci	varchar(255)
 4.0000	information_schema	ENABLED_ROLES	ROLE_HOST	varchar	255	1020	utf8mb4	utf8mb4_0900_ai_ci	varchar(255)
 3.0000	information_schema	ENABLED_ROLES	IS_DEFAULT	varchar	3	9	utf8mb3	utf8mb3_general_ci	varchar(3)

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

@@ -271,6 +271,29 @@ user_comment
 Separator	-----------------------------------------------------
 TABLE_CATALOG	def
 TABLE_SCHEMA	information_schema
+TABLE_NAME	DATABASE_APPLIED_HLC
+TABLE_TYPE	SYSTEM VIEW
+ENGINE	NULL
+VERSION	10
+ROW_FORMAT	NULL
+TABLE_ROWS	#TBLR#
+AVG_ROW_LENGTH	#ARL#
+DATA_LENGTH	#DL#
+MAX_DATA_LENGTH	#MDL#
+INDEX_LENGTH	#IL#
+DATA_FREE	#DF#
+AUTO_INCREMENT	#AI#
+CREATE_TIME	#CRT#
+UPDATE_TIME	#UT#
+CHECK_TIME	#CT#
+TABLE_COLLATION	NULL
+CHECKSUM	NULL
+CREATE_OPTIONS	#CO#
+TABLE_COMMENT	#TC#
+user_comment	
+Separator	-----------------------------------------------------
+TABLE_CATALOG	def
+TABLE_SCHEMA	information_schema
 TABLE_NAME	ENABLED_ROLES
 TABLE_TYPE	SYSTEM VIEW
 ENGINE	NULL
@@ -1441,6 +1464,29 @@ user_comment
 Separator	-----------------------------------------------------
 TABLE_CATALOG	def
 TABLE_SCHEMA	information_schema
+TABLE_NAME	DATABASE_APPLIED_HLC
+TABLE_TYPE	SYSTEM VIEW
+ENGINE	NULL
+VERSION	10
+ROW_FORMAT	NULL
+TABLE_ROWS	#TBLR#
+AVG_ROW_LENGTH	#ARL#
+DATA_LENGTH	#DL#
+MAX_DATA_LENGTH	#MDL#
+INDEX_LENGTH	#IL#
+DATA_FREE	#DF#
+AUTO_INCREMENT	#AI#
+CREATE_TIME	#CRT#
+UPDATE_TIME	#UT#
+CHECK_TIME	#CT#
+TABLE_COLLATION	NULL
+CHECKSUM	NULL
+CREATE_OPTIONS	#CO#
+TABLE_COMMENT	#TC#
+user_comment	
+Separator	-----------------------------------------------------
+TABLE_CATALOG	def
+TABLE_SCHEMA	information_schema
 TABLE_NAME	ENABLED_ROLES
 TABLE_TYPE	SYSTEM VIEW
 ENGINE	NULL

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

@@ -17,6 +17,7 @@ COLUMNS
 COLUMNS_EXTENSIONS
 COLUMN_PRIVILEGES
 COLUMN_STATISTICS
+DATABASE_APPLIED_HLC
 ENABLED_ROLES
 ENGINES
 EVENTS