MDEV-27106 Spider: specify connection to data node by engine-defined attributes

We introduce engine-defined attributes to specify remote data nodes.

The engine attributes do not cover all the existing DSN parameters
because most of them need not be specified at the table level.
We introduce the following three attributes: REMOTE_SERVER,
REMOTE_DATABASE, REMOTE_TABLE.

One cannot specify both DSN parameter, in COMMENT or CONNECT, and
engine-defined attribute that are for the same SPIDER_SHARE attribute.
For example, Spider returns an error if both COMMENT='table "t1"'
and REMOTE_TABLE="t2" are specified for a single Spider table or
a single partition in a Spider table.

storage/spider/mysql-test/spider/feature/r/engine_defined_attributes.result

+#
+# MDEV-27106 Spider: specify connection to data node by engine-defined attributes
+#
+for master_1
+for child2
+child2_1
+child2_2
+child2_3
+for child3
+connection master_1;
+CREATE DATABASE auto_test_local;
+USE auto_test_local;
+connection child2_1;
+CREATE DATABASE auto_test_remote;
+USE auto_test_remote;
+CREATE TABLE tbl_a (
+a INT,
+b VARCHAR(255),
+PRIMARY KEY(a)
+) ENGINE=InnoDB DEFAULT CHARSET=utf8;
+connection child2_2;
+CREATE DATABASE auto_test_remote2;
+USE auto_test_remote2;
+CREATE TABLE tbl_a (
+a INT,
+b VARCHAR(255),
+PRIMARY KEY(a)
+) ENGINE=InnoDB DEFAULT CHARSET=utf8;
+# Single data node
+connection master_1;
+CREATE TABLE tbl_a (
+a INT,
+b VARCHAR(255),
+PRIMARY KEY(a)
+) ENGINE=Spider DEFAULT CHARSET=utf8
+REMOTE_SERVER="s_2_1" REMOTE_TABLE="tbl_a";
+INSERT INTO tbl_a VALUES (1, "aaa"), (2, "bbb"), (3, "ccc"), (4, "ddd");
+SELECT * FROM tbl_a;
+a	b
+1	aaa
+2	bbb
+3	ccc
+4	ddd
+DELETE FROM tbl_a;
+DROP TABLE tbl_a;
+# Multiple data nodes with high availability setting
+connection master_1;
+CREATE TABLE tbl_a (
+a INT,
+b VARCHAR(255),
+PRIMARY KEY(a)
+) ENGINE=Spider DEFAULT CHARSET=utf8
+REMOTE_SERVER="s_2_1 s_2_2" REMOTE_TABLE="tbl_a";
+INSERT INTO tbl_a VALUES (1, "aaa"), (2, "bbb"), (3, "ccc"), (4, "ddd");
+SELECT * FROM tbl_a;
+a	b
+1	aaa
+2	bbb
+3	ccc
+4	ddd
+connection child2_1;
+SELECT * FROM tbl_a;
+a	b
+1	aaa
+2	bbb
+3	ccc
+4	ddd
+connection child2_2;
+SELECT * FROM tbl_a;
+a	b
+1	aaa
+2	bbb
+3	ccc
+4	ddd
+connection master_1;
+DELETE FROM tbl_a;
+DROP TABLE tbl_a;
+# Multiple data nodes with partition options
+connection master_1;
+CREATE TABLE tbl_a (
+a INT,
+b VARCHAR(255),
+PRIMARY KEY(a)
+) ENGINE=Spider DEFAULT CHARSET=utf8
+PARTITION BY RANGE (a) (
+PARTITION p1 VALUES LESS THAN (3) REMOTE_SERVER="s_2_1" REMOTE_TABLE="tbl_a",
+PARTITION p2 VALUES LESS THAN MAXVALUE REMOTE_SERVER="s_2_2" REMOTE_TABLE="tbl_a"
+);
+INSERT INTO tbl_a VALUES (1, "aaa"), (2, "bbb"), (3, "ccc"), (4, "ddd");
+SELECT * FROM tbl_a;
+a	b
+1	aaa
+2	bbb
+3	ccc
+4	ddd
+DELETE FROM tbl_a;
+DROP TABLE tbl_a;
+# Multiple data nodes with table options + partition options
+connection master_1;
+CREATE TABLE tbl_a (
+a INT,
+b VARCHAR(255),
+PRIMARY KEY(a)
+) ENGINE=Spider DEFAULT CHARSET=utf8
+REMOTE_SERVER="s_2_1" REMOTE_TABLE="tbl_a"
+PARTITION BY RANGE (a) (
+PARTITION p1 VALUES LESS THAN (3),
+PARTITION p2 VALUES LESS THAN MAXVALUE REMOTE_SERVER="s_2_2"
+);
+INSERT INTO tbl_a VALUES (1, "aaa"), (2, "bbb"), (3, "ccc"), (4, "ddd");
+SELECT * FROM tbl_a;
+a	b
+1	aaa
+2	bbb
+3	ccc
+4	ddd
+connection child2_1;
+SELECT * FROM tbl_a;
+a	b
+1	aaa
+2	bbb
+connection master_1;
+DELETE FROM tbl_a;
+DROP TABLE tbl_a;
+# COMMENT + engine-defined option
+connection master_1;
+CREATE TABLE tbl_a (
+a INT,
+b VARCHAR(255),
+PRIMARY KEY(a)
+) ENGINE=Spider DEFAULT CHARSET=utf8
+COMMENT='tbl "tbl_a"'
+PARTITION BY RANGE (a) (
+PARTITION p1 VALUES LESS THAN (3) COMMENT='srv "s_2_1"',
+PARTITION p2 VALUES LESS THAN MAXVALUE REMOTE_SERVER="s_2_2"
+);
+INSERT INTO tbl_a VALUES (1, "aaa"), (2, "bbb"), (3, "ccc"), (4, "ddd");
+SELECT * FROM tbl_a;
+a	b
+1	aaa
+2	bbb
+3	ccc
+4	ddd
+connection child2_1;
+SELECT * FROM tbl_a;
+a	b
+1	aaa
+2	bbb
+connection master_1;
+DELETE FROM tbl_a;
+DROP TABLE tbl_a;
+# COMMENT + engine-defined option (invalid)
+connection master_1;
+CREATE TABLE tbl_a (
+a INT,
+b VARCHAR(255),
+PRIMARY KEY(a)
+) ENGINE=Spider DEFAULT CHARSET=utf8
+REMOTE_SERVER="s_2_1" REMOTE_TABLE="tbl_a" COMMENT='tbl "tbl_b"';
+ERROR HY000: Can't create table `auto_test_local`.`tbl_a` (errno: 12501 "Unknown error 12501")
+CREATE TABLE tbl_a (
+a INT,
+b VARCHAR(255),
+PRIMARY KEY(a)
+) ENGINE=Spider DEFAULT CHARSET=utf8
+COMMENT='srv "s_2_1"' REMOTE_TABLE="tbl_a"
+PARTITION BY RANGE (a) (
+PARTITION p1 VALUES LESS THAN (3),
+PARTITION p2 VALUES LESS THAN MAXVALUE REMOTE_SERVER="s_2_2"
+);
+ERROR HY000: Can't create table `auto_test_local`.`tbl_a` (errno: 12501 "Unknown error 12501")
+# Various combinations of COMMENTs and options
+CREATE TABLE tbl_a (
+a INT,
+b VARCHAR(255),
+PRIMARY KEY(a)
+) ENGINE=Spider DEFAULT CHARSET=utf8
+REMOTE_SERVER="s_2_1" REMOTE_DATABASE="auto_test_remote" REMOTE_TABLE="tbl_a";
+SELECT * FROM tbl_a;
+a	b
+DROP TABLE tbl_a;
+CREATE TABLE tbl_a (
+a INT,
+b VARCHAR(255),
+PRIMARY KEY(a)
+) ENGINE=Spider DEFAULT CHARSET=utf8
+REMOTE_TABLE="tbl_a"
+PARTITION BY RANGE (a) (
+PARTITION p1 VALUES LESS THAN (3)
+REMOTE_SERVER="s_2_1" COMMENT='database "auto_test_remote"',
+PARTITION p2 VALUES LESS THAN MAXVALUE
+REMOTE_SERVER="s_2_2" REMOTE_DATABASE="auto_test_remote2"
+);
+SELECT * FROM tbl_a;
+a	b
+DROP TABLE tbl_a;
+CREATE TABLE tbl_a (
+a INT,
+b VARCHAR(255),
+PRIMARY KEY(a)
+) ENGINE=Spider DEFAULT CHARSET=utf8
+COMMENT='tbl "tbl_a"'
+PARTITION BY RANGE (a) (
+PARTITION p1 VALUES LESS THAN (3)
+REMOTE_SERVER="s_2_1" REMOTE_DATABASE="auto_test_remote",
+PARTITION p2 VALUES LESS THAN MAXVALUE
+REMOTE_SERVER="s_2_2" REMOTE_DATABASE="auto_test_remote2"
+);
+SELECT * FROM tbl_a;
+a	b
+DROP TABLE tbl_a;
+connection child2_1;
+DROP DATABASE auto_test_remote;
+connection child2_2;
+DROP DATABASE auto_test_remote2;
+connection master_1;
+DROP DATABASE auto_test_local;
+for master_1
+for child2
+child2_1
+child2_2
+child2_3
+for child3

storage/spider/mysql-test/spider/feature/t/engine_defined_attributes.cnf

+!include include/default_mysqld.cnf
+!include ../my_1_1.cnf
+!include ../my_2_1.cnf
+!include ../my_2_2.cnf

storage/spider/mysql-test/spider/feature/t/engine_defined_attributes.test

+--echo #
+--echo # MDEV-27106 Spider: specify connection to data node by engine-defined attributes
+--echo #
+
+--disable_query_log
+--disable_result_log
+--source ../t/test_init.inc
+--enable_result_log
+--enable_query_log
+
+--connection master_1
+CREATE DATABASE auto_test_local;
+USE auto_test_local;
+
+--connection child2_1
+CREATE DATABASE auto_test_remote;
+USE auto_test_remote;
+eval CREATE TABLE tbl_a (
+  a INT,
+  b VARCHAR(255),
+  PRIMARY KEY(a)
+) $CHILD2_1_ENGINE $CHILD2_1_CHARSET;
+
+--connection child2_2
+CREATE DATABASE auto_test_remote2;
+USE auto_test_remote2;
+eval CREATE TABLE tbl_a (
+  a INT,
+  b VARCHAR(255),
+  PRIMARY KEY(a)
+) $CHILD2_1_ENGINE $CHILD2_1_CHARSET;
+
+--echo # Single data node
+--connection master_1
+eval CREATE TABLE tbl_a (
+  a INT,
+  b VARCHAR(255),
+  PRIMARY KEY(a)
+) $MASTER_1_ENGINE $MASTER_1_CHARSET
+REMOTE_SERVER="s_2_1" REMOTE_TABLE="tbl_a";
+
+INSERT INTO tbl_a VALUES (1, "aaa"), (2, "bbb"), (3, "ccc"), (4, "ddd");
+SELECT * FROM tbl_a;
+
+DELETE FROM tbl_a;
+DROP TABLE tbl_a;
+
+--echo # Multiple data nodes with high availability setting
+--connection master_1
+eval CREATE TABLE tbl_a (
+  a INT,
+  b VARCHAR(255),
+  PRIMARY KEY(a)
+) $MASTER_1_ENGINE $MASTER_1_CHARSET
+REMOTE_SERVER="s_2_1 s_2_2" REMOTE_TABLE="tbl_a";
+
+INSERT INTO tbl_a VALUES (1, "aaa"), (2, "bbb"), (3, "ccc"), (4, "ddd");
+SELECT * FROM tbl_a;
+
+--connection child2_1
+SELECT * FROM tbl_a;
+
+--connection child2_2
+SELECT * FROM tbl_a;
+
+--connection master_1
+DELETE FROM tbl_a;
+DROP TABLE tbl_a;
+
+--echo # Multiple data nodes with partition options
+--connection master_1
+eval CREATE TABLE tbl_a (
+  a INT,
+  b VARCHAR(255),
+  PRIMARY KEY(a)
+) $MASTER_1_ENGINE $MASTER_1_CHARSET
+PARTITION BY RANGE (a) (
+    PARTITION p1 VALUES LESS THAN (3) REMOTE_SERVER="s_2_1" REMOTE_TABLE="tbl_a",
+    PARTITION p2 VALUES LESS THAN MAXVALUE REMOTE_SERVER="s_2_2" REMOTE_TABLE="tbl_a"
+);
+
+INSERT INTO tbl_a VALUES (1, "aaa"), (2, "bbb"), (3, "ccc"), (4, "ddd");
+SELECT * FROM tbl_a;
+
+DELETE FROM tbl_a;
+DROP TABLE tbl_a;
+
+--echo # Multiple data nodes with table options + partition options
+--connection master_1
+eval CREATE TABLE tbl_a (
+  a INT,
+  b VARCHAR(255),
+  PRIMARY KEY(a)
+) $MASTER_1_ENGINE $MASTER_1_CHARSET
+REMOTE_SERVER="s_2_1" REMOTE_TABLE="tbl_a"
+PARTITION BY RANGE (a) (
+    PARTITION p1 VALUES LESS THAN (3),
+    PARTITION p2 VALUES LESS THAN MAXVALUE REMOTE_SERVER="s_2_2"
+);
+
+INSERT INTO tbl_a VALUES (1, "aaa"), (2, "bbb"), (3, "ccc"), (4, "ddd");
+SELECT * FROM tbl_a;
+
+--connection child2_1
+SELECT * FROM tbl_a;
+
+--connection master_1
+DELETE FROM tbl_a;
+DROP TABLE tbl_a;
+
+--echo # COMMENT + engine-defined option
+--connection master_1
+eval CREATE TABLE tbl_a (
+  a INT,
+  b VARCHAR(255),
+  PRIMARY KEY(a)
+) $MASTER_1_ENGINE $MASTER_1_CHARSET
+COMMENT='tbl "tbl_a"'
+PARTITION BY RANGE (a) (
+    PARTITION p1 VALUES LESS THAN (3) COMMENT='srv "s_2_1"',
+    PARTITION p2 VALUES LESS THAN MAXVALUE REMOTE_SERVER="s_2_2"
+);
+
+INSERT INTO tbl_a VALUES (1, "aaa"), (2, "bbb"), (3, "ccc"), (4, "ddd");
+SELECT * FROM tbl_a;
+
+--connection child2_1
+SELECT * FROM tbl_a;
+
+--connection master_1
+DELETE FROM tbl_a;
+DROP TABLE tbl_a;
+
+--echo # COMMENT + engine-defined option (invalid)
+--connection master_1
+
+--error ER_CANT_CREATE_TABLE
+eval CREATE TABLE tbl_a (
+  a INT,
+  b VARCHAR(255),
+  PRIMARY KEY(a)
+) $MASTER_1_ENGINE $MASTER_1_CHARSET
+REMOTE_SERVER="s_2_1" REMOTE_TABLE="tbl_a" COMMENT='tbl "tbl_b"';
+
+--error ER_CANT_CREATE_TABLE
+eval CREATE TABLE tbl_a (
+  a INT,
+  b VARCHAR(255),
+  PRIMARY KEY(a)
+) $MASTER_1_ENGINE $MASTER_1_CHARSET
+COMMENT='srv "s_2_1"' REMOTE_TABLE="tbl_a"
+PARTITION BY RANGE (a) (
+    PARTITION p1 VALUES LESS THAN (3),
+    PARTITION p2 VALUES LESS THAN MAXVALUE REMOTE_SERVER="s_2_2"
+);
+
+--echo # Various combinations of COMMENTs and options
+eval CREATE TABLE tbl_a (
+  a INT,
+  b VARCHAR(255),
+  PRIMARY KEY(a)
+) $MASTER_1_ENGINE $MASTER_1_CHARSET
+REMOTE_SERVER="s_2_1" REMOTE_DATABASE="auto_test_remote" REMOTE_TABLE="tbl_a";
+SELECT * FROM tbl_a;
+DROP TABLE tbl_a;
+
+eval CREATE TABLE tbl_a (
+  a INT,
+  b VARCHAR(255),
+  PRIMARY KEY(a)
+) $MASTER_1_ENGINE $MASTER_1_CHARSET
+REMOTE_TABLE="tbl_a"
+PARTITION BY RANGE (a) (
+  PARTITION p1 VALUES LESS THAN (3)
+    REMOTE_SERVER="s_2_1" COMMENT='database "auto_test_remote"',
+  PARTITION p2 VALUES LESS THAN MAXVALUE
+    REMOTE_SERVER="s_2_2" REMOTE_DATABASE="auto_test_remote2"
+);
+SELECT * FROM tbl_a;
+DROP TABLE tbl_a;
+
+eval CREATE TABLE tbl_a (
+  a INT,
+  b VARCHAR(255),
+  PRIMARY KEY(a)
+) $MASTER_1_ENGINE $MASTER_1_CHARSET
+COMMENT='tbl "tbl_a"'
+PARTITION BY RANGE (a) (
+  PARTITION p1 VALUES LESS THAN (3)
+    REMOTE_SERVER="s_2_1" REMOTE_DATABASE="auto_test_remote",
+  PARTITION p2 VALUES LESS THAN MAXVALUE
+    REMOTE_SERVER="s_2_2" REMOTE_DATABASE="auto_test_remote2"
+);
+SELECT * FROM tbl_a;
+DROP TABLE tbl_a;
+
+--connection child2_1
+DROP DATABASE auto_test_remote;
+
+--connection child2_2
+DROP DATABASE auto_test_remote2;
+
+--connection master_1
+DROP DATABASE auto_test_local;
+
+--disable_query_log
+--disable_result_log
+--source ../t/test_deinit.inc
+--enable_result_log
+--enable_query_log

storage/spider/spd_table.cc

@@ -31,6 +31,7 @@
 #include "sql_select.h"
 #include "tztime.h"
 #include "sql_parse.h"
+#include "create_options.h"
 #endif
 #include "spd_err.h"
 #include "spd_param.h"
@@ -311,6 +312,18 @@ static PSI_thread_info all_spider_threads[] = {
 };
 #endif
 
+struct ha_table_option_struct
+{
+  char *remote_server;
+  char *remote_database;
+  char *remote_table;
+};
+
+ha_create_table_option spider_table_option_list[]= {
+    HA_TOPTION_STRING("REMOTE_SERVER", remote_server),
+    HA_TOPTION_STRING("REMOTE_DATABASE", remote_database),
+    HA_TOPTION_STRING("REMOTE_TABLE", remote_table), HA_TOPTION_END};
+
 extern HASH spider_open_connections;
 extern HASH spider_ipport_conns;
 extern uint spider_open_connections_id;
@@ -1175,7 +1188,8 @@ int spider_create_string_list(
   DBUG_ENTER("spider_create_string_list");
 
   *list_length = 0;
-  param_string_parse->init_param_value();
+  if (param_string_parse)
+    param_string_parse->init_param_value();
   if (!str)
   {
     *string_list = NULL;
@@ -1375,8 +1389,9 @@ int spider_create_string_list(
     }
   }
 
-  param_string_parse->set_param_value(tmp_ptr3,
-                                      tmp_ptr3 + strlen(tmp_ptr3) + 1);
+  if (param_string_parse)
+    param_string_parse->set_param_value(tmp_ptr3,
+                                        tmp_ptr3 + strlen(tmp_ptr3) + 1);
 
   DBUG_PRINT("info",("spider string_list[%d]=%s", roop_count,
     (*string_list)[roop_count]));
@@ -1834,9 +1849,16 @@ int st_spider_param_string_parse::print_param_error()
 #define SPIDER_PARAM_STR_LENS(name) name ## _lengths
 #define SPIDER_PARAM_STR_CHARLEN(name) name ## _charlen
 #define SPIDER_PARAM_STR_LIST(title_name, param_name) \
+  SPIDER_PARAM_STR_LIST_CHECK(title_name, param_name, FALSE)
+#define SPIDER_PARAM_STR_LIST_CHECK(title_name, param_name, already_set) \
   if (!strncasecmp(tmp_ptr, title_name, title_length)) \
   { \
     DBUG_PRINT("info",("spider " title_name " start")); \
+    if (already_set)                                    \
+    {                                                   \
+      error_num= ER_SPIDER_INVALID_CONNECT_INFO_NUM;    \
+      goto error;                                       \
+    }                                                   \
     if (!share->param_name) \
     { \
       if ((tmp_ptr2 = spider_get_string_between_quote( \
@@ -2061,6 +2083,31 @@ int st_spider_param_string_parse::print_param_error()
     break; \
   }
 
+/*
+  Set a given engine-defined option, which holds a string list, to the
+  corresponding attribute of SPIDER_SHARE.
+*/
+#define SPIDER_OPTION_STR_LIST(title_name, option_name, param_name) \
+  if (option_struct->option_name)                                             \
+  {                                                                           \
+    DBUG_PRINT("info", ("spider " title_name " start overwrite"));            \
+    share->SPIDER_PARAM_STR_CHARLEN(param_name)=                              \
+        strlen(option_struct->option_name);                                   \
+    if ((error_num= spider_create_string_list(                                \
+             &share->param_name, &share->SPIDER_PARAM_STR_LENS(param_name),   \
+             &share->SPIDER_PARAM_STR_LEN(param_name),                        \
+             option_struct->option_name,                                      \
+             share->SPIDER_PARAM_STR_CHARLEN(param_name), NULL)))             \
+      goto error;                                                             \
+  }
+
+/*
+  Parse connection information specified by COMMENT, CONNECT, or engine-defined
+  options.
+
+  TODO: Deprecate the connection specification by COMMENT and CONNECT,
+  and then solely utilize engine-defined options.
+*/
 int spider_parse_connect_info(
   SPIDER_SHARE *share,
   TABLE_SHARE *table_share,
@@ -2077,6 +2124,7 @@ int spider_parse_connect_info(
   int title_length;
   SPIDER_PARAM_STRING_PARSE connect_string_parse;
   SPIDER_ALTER_TABLE *share_alter;
+  ha_table_option_struct *option_struct;
 #ifdef WITH_PARTITION_STORAGE_ENGINE
   partition_element *part_elem;
   partition_element *sub_elem;
@@ -2099,7 +2147,14 @@ int spider_parse_connect_info(
 #ifdef WITH_PARTITION_STORAGE_ENGINE
   spider_get_partition_info(share->table_name, share->table_name_length,
     table_share, part_info, &part_elem, &sub_elem);
+  if (part_info)
+    if (part_info->is_sub_partitioned())
+      option_struct= sub_elem->option_struct;
+    else
+      option_struct= part_elem->option_struct;
+  else
 #endif
+    option_struct= table_share->option_struct;
 #ifndef WITHOUT_SPIDER_BG_SEARCH
   share->sts_bg_mode = -1;
 #endif
@@ -2425,7 +2480,8 @@ int spider_parse_connect_info(
           SPIDER_PARAM_STR_LIST("sqn", tgt_sequence_names);
           SPIDER_PARAM_LONGLONG("srd", second_read, 0);
           SPIDER_PARAM_DOUBLE("srt", scan_rate, 0);
-          SPIDER_PARAM_STR_LIST("srv", server_names);
+          SPIDER_PARAM_STR_LIST_CHECK("srv", server_names,
+                                      option_struct->remote_server);
           SPIDER_PARAM_DOUBLE("ssr", semi_split_read, 0);
           SPIDER_PARAM_LONGLONG("ssl", semi_split_read_limit, 0);
 #ifdef WITH_PARTITION_STORAGE_ENGINE
@@ -2435,7 +2491,8 @@ int spider_parse_connect_info(
           SPIDER_PARAM_INT_WITH_MAX("stl", semi_table_lock, 0, 1);
           SPIDER_PARAM_LONGLONG("srs", static_records_for_status, 0);
           SPIDER_PARAM_LONG_LIST_WITH_MAX("svc", tgt_ssl_vscs, 0, 1);
-          SPIDER_PARAM_STR_LIST("tbl", tgt_table_names);
+          SPIDER_PARAM_STR_LIST_CHECK("tbl", tgt_table_names,
+                                      option_struct->remote_table);
           SPIDER_PARAM_INT_WITH_MAX("tcm", table_count_mode, 0, 3);
           SPIDER_PARAM_LONG_LIST_WITH_MAX("uhd", use_handlers, 0, 3);
 #if defined(HS_HAS_SQLCOM) && defined(HAVE_HANDLERSOCKET)
@@ -2455,12 +2512,14 @@ int spider_parse_connect_info(
           error_num = connect_string_parse.print_param_error();
           goto error;
         case 5:
-          SPIDER_PARAM_STR_LIST("table", tgt_table_names);
+          SPIDER_PARAM_STR_LIST_CHECK("table", tgt_table_names,
+                                      option_struct->remote_table);
           error_num = connect_string_parse.print_param_error();
           goto error;
         case 6:
           SPIDER_PARAM_STR_LIST("driver", tgt_drivers);
-          SPIDER_PARAM_STR_LIST("server", server_names);
+          SPIDER_PARAM_STR_LIST_CHECK("server", server_names,
+                                      option_struct->remote_server);
           SPIDER_PARAM_STR_LIST("socket", tgt_sockets);
           SPIDER_PARAM_HINT("idx", key_hint, 3, (int) table_share->keys,
             spider_db_append_key_hint);
@@ -2477,7 +2536,8 @@ int spider_parse_connect_info(
           error_num = connect_string_parse.print_param_error();
           goto error;
         case 8:
-          SPIDER_PARAM_STR_LIST("database", tgt_dbs);
+          SPIDER_PARAM_STR_LIST_CHECK("database", tgt_dbs,
+                                      option_struct->remote_database);
           SPIDER_PARAM_STR_LIST("password", tgt_passwords);
           SPIDER_PARAM_INT_WITH_MAX("sts_mode", sts_mode, 1, 2);
 #ifdef WITH_PARTITION_STORAGE_ENGINE
@@ -2730,6 +2790,10 @@ int spider_parse_connect_info(
     }
   }
 
+  SPIDER_OPTION_STR_LIST("server", remote_server, server_names);
+  SPIDER_OPTION_STR_LIST("database", remote_database, tgt_dbs);
+  SPIDER_OPTION_STR_LIST("table", remote_table, tgt_table_names);
+
   /* check all_link_count */
   share->all_link_count = 1;
   if (share->all_link_count < share->server_names_length)
@@ -7404,6 +7468,7 @@ int spider_db_init(
 #ifdef SPIDER_HAS_GROUP_BY_HANDLER
   spider_hton->create_group_by = spider_create_group_by_handler;
 #endif
+  spider_hton->table_options= spider_table_option_list;
 
   if (my_gethwaddr((uchar *) addr))
   {
@@ -7977,6 +8042,12 @@ char *spider_create_table_name_string(
 }
 
 #ifdef WITH_PARTITION_STORAGE_ENGINE
+/*
+  Get the target partition_elements.
+
+  The target partition and subpartition are detected by the table name,
+  which is in the form like "t1#P#pt1".
+*/
 void spider_get_partition_info(
   const char *table_name,
   uint table_name_length,