MDEV-12542 Add bind_address system variable.

        bind_address variable added.

mysql-test/suite/sys_vars/r/bind_address_basic.result

+'#---------------------BS_STVARS_001_01----------------------#'
+SELECT COUNT(@@GLOBAL.bind_address);
+COUNT(@@GLOBAL.bind_address)
+1
+1 Expected
+'#---------------------BS_STVARS_001_02----------------------#'
+SET @@GLOBAL.bind_address=1;
+ERROR HY000: Variable 'bind_address' is a read only variable
+Expected error 'Read only variable'
+SELECT COUNT(@@GLOBAL.bind_address);
+COUNT(@@GLOBAL.bind_address)
+1
+1 Expected
+'#---------------------BS_STVARS_001_03----------------------#'
+SELECT VARIABLE_VALUE = ''
+FROM INFORMATION_SCHEMA.GLOBAL_VARIABLES
+WHERE VARIABLE_NAME='bind_address';
+VARIABLE_VALUE = ''
+0
+0 Expected
+SELECT COUNT(@@GLOBAL.bind_address);
+COUNT(@@GLOBAL.bind_address)
+1
+1 Expected
+SELECT COUNT(VARIABLE_VALUE)
+FROM INFORMATION_SCHEMA.GLOBAL_VARIABLES 
+WHERE VARIABLE_NAME='bind_address';
+COUNT(VARIABLE_VALUE)
+1
+1 Expected
+'#---------------------BS_STVARS_001_04----------------------#'
+SELECT @@bind_address is NULL AND @@GLOBAL.bind_address is NULL;
+@@bind_address is NULL AND @@GLOBAL.bind_address is NULL
+0
+0 Expected
+SELECT @@bind_address is NOT NULL AND @@GLOBAL.bind_address is NOT NULL;
+@@bind_address is NOT NULL AND @@GLOBAL.bind_address is NOT NULL
+1
+1 Expected
+'#---------------------BS_STVARS_001_05----------------------#'
+SELECT COUNT(@@bind_address);
+COUNT(@@bind_address)
+1
+1 Expected
+SELECT COUNT(@@local.bind_address);
+ERROR HY000: Variable 'bind_address' is a GLOBAL variable
+Expected error 'Variable is a GLOBAL variable'
+SELECT COUNT(@@SESSION.bind_address);
+ERROR HY000: Variable 'bind_address' is a GLOBAL variable
+Expected error 'Variable is a GLOBAL variable'
+SELECT COUNT(@@GLOBAL.bind_address);
+COUNT(@@GLOBAL.bind_address)
+1
+1 Expected
+SELECT bind_address = @@SESSION.bind_address;
+ERROR 42S22: Unknown column 'bind_address' in 'field list'
+Expected error 'Readonly variable'

mysql-test/suite/sys_vars/r/sysvars_server_notembedded.result

@@ -122,6 +122,20 @@ NUMERIC_BLOCK_SIZE	NULL
 ENUM_VALUE_LIST	OFF,ON
 READ_ONLY	NO
 COMMAND_LINE_ARGUMENT	OPTIONAL
+VARIABLE_NAME	BIND_ADDRESS
+SESSION_VALUE	NULL
+GLOBAL_VALUE	127.0.0.1
+GLOBAL_VALUE_ORIGIN	CONFIG
+DEFAULT_VALUE	
+VARIABLE_SCOPE	GLOBAL
+VARIABLE_TYPE	VARCHAR
+VARIABLE_COMMENT	IP address to bind to.
+NUMERIC_MIN_VALUE	NULL
+NUMERIC_MAX_VALUE	NULL
+NUMERIC_BLOCK_SIZE	NULL
+ENUM_VALUE_LIST	NULL
+READ_ONLY	YES
+COMMAND_LINE_ARGUMENT	REQUIRED
 VARIABLE_NAME	BINLOG_ANNOTATE_ROW_EVENTS
 SESSION_VALUE	ON
 GLOBAL_VALUE	ON

mysql-test/suite/sys_vars/t/bind_address_basic.test

+
+
+################## mysql-test\t\bind_address_basic.test ############################
+#                                                                             #
+# Variable Name: bind_address                                                 #
+# Scope: Global                                                               #
+# Access Type: Static                                                         #
+# Data Type: filename                                                         #
+###############################################################################
+
+--source include/not_embedded.inc
+
+--echo '#---------------------BS_STVARS_001_01----------------------#'
+####################################################################
+#   Displaying default value                                       #
+####################################################################
+SELECT COUNT(@@GLOBAL.bind_address);
+--echo 1 Expected
+
+
+--echo '#---------------------BS_STVARS_001_02----------------------#'
+####################################################################
+#   Check if Value can set                                         #
+####################################################################
+
+--error ER_INCORRECT_GLOBAL_LOCAL_VAR
+SET @@GLOBAL.bind_address=1;
+--echo Expected error 'Read only variable'
+
+SELECT COUNT(@@GLOBAL.bind_address);
+--echo 1 Expected
+
+
+
+
+--echo '#---------------------BS_STVARS_001_03----------------------#'
+#################################################################
+# Check if the value in GLOBAL Table matches value in variable  #
+#################################################################
+
+--disable_warnings
+SELECT VARIABLE_VALUE = ''
+FROM INFORMATION_SCHEMA.GLOBAL_VARIABLES
+WHERE VARIABLE_NAME='bind_address';
+--enable_warnings
+--echo 0 Expected
+
+SELECT COUNT(@@GLOBAL.bind_address);
+--echo 1 Expected
+
+--disable_warnings
+SELECT COUNT(VARIABLE_VALUE)
+FROM INFORMATION_SCHEMA.GLOBAL_VARIABLES 
+WHERE VARIABLE_NAME='bind_address';
+--enable_warnings
+--echo 1 Expected
+
+
+
+--echo '#---------------------BS_STVARS_001_04----------------------#'
+################################################################################
+#  Check if accessing variable with and without GLOBAL point to same variable  #
+################################################################################
+SELECT @@bind_address is NULL AND @@GLOBAL.bind_address is NULL;
+--echo 0 Expected
+
+SELECT @@bind_address is NOT NULL AND @@GLOBAL.bind_address is NOT NULL;
+--echo 1 Expected
+
+
+
+--echo '#---------------------BS_STVARS_001_05----------------------#'
+################################################################################
+#   Check if bind_address can be accessed with and without @@ sign                  #
+################################################################################
+
+SELECT COUNT(@@bind_address);
+--echo 1 Expected
+
+--Error ER_INCORRECT_GLOBAL_LOCAL_VAR
+SELECT COUNT(@@local.bind_address);
+--echo Expected error 'Variable is a GLOBAL variable'
+
+--Error ER_INCORRECT_GLOBAL_LOCAL_VAR
+SELECT COUNT(@@SESSION.bind_address);
+--echo Expected error 'Variable is a GLOBAL variable'
+
+SELECT COUNT(@@GLOBAL.bind_address);
+--echo 1 Expected
+
+--Error ER_BAD_FIELD_ERROR
+SELECT bind_address = @@SESSION.bind_address;
+--echo Expected error 'Readonly variable'
+
+

sql/mysqld.cc

@@ -7297,9 +7297,6 @@ struct my_option my_long_options[]=
   {"autocommit", 0, "Set default value for autocommit (0 or 1)",
    &opt_autocommit, &opt_autocommit, 0,
    GET_BOOL, OPT_ARG, 1, 0, 0, 0, 0, NULL},
-  {"bind-address", 0, "IP address to bind to.",
-   &my_bind_addr_str, &my_bind_addr_str, 0, GET_STR,
-   REQUIRED_ARG, 0, 0, 0, 0, 0, 0},
   {"binlog-do-db", OPT_BINLOG_DO_DB,
    "Tells the master it should log updates for the specified database, "
    "and exclude all others not explicitly mentioned.",

sql/mysqld.h

@@ -152,6 +152,7 @@ extern my_bool opt_enable_shared_memory;
 extern ulong opt_replicate_events_marked_for_skip;
 extern char *default_tz_name;
 extern Time_zone *default_tz;
+extern char *my_bind_addr_str;
 extern char *default_storage_engine, *default_tmp_storage_engine;
 extern char *enforced_storage_engine;
 extern char *gtid_pos_auto_engines;

sql/sys_vars.cc

@@ -382,6 +382,13 @@ static Sys_var_charptr Sys_basedir(
        READ_ONLY GLOBAL_VAR(mysql_home_ptr), CMD_LINE(REQUIRED_ARG, 'b'),
        IN_FS_CHARSET, DEFAULT(0));
 
+#ifndef EMBEDDED_LIBRARY
+static Sys_var_charptr Sys_my_bind_addr(
+       "bind_address", "IP address to bind to.",
+       READ_ONLY GLOBAL_VAR(my_bind_addr_str), CMD_LINE(REQUIRED_ARG),
+       IN_FS_CHARSET, DEFAULT(0));
+#endif
+
 static Sys_var_ulonglong Sys_binlog_cache_size(
        "binlog_cache_size", "The size of the transactional cache for "
        "updates to transactional engines for the binary log. "