Add information_schema.spider_wrapper_protocols for knowing available wrappers of Spider

storage/spider/mysql-test/spider/include/deinit_spider.inc

@@ -33,6 +33,7 @@ DROP FUNCTION spider_copy_tables;
 DROP FUNCTION spider_ping_table;
 DROP FUNCTION spider_bg_direct_sql;
 DROP FUNCTION spider_direct_sql;
+UNINSTALL PLUGIN spider_wrapper_protocols;
 UNINSTALL PLUGIN spider_alloc_mem;
 UNINSTALL PLUGIN spider;
 DROP TABLE IF EXISTS mysql.spider_xa;

storage/spider/mysql-test/spider/r/spider_wrapper_protocols.result

@@ -0,0 +1,22 @@
+for master_1
+for child2
+child2_1
+child2_2
+child2_3
+for child3
+child3_1
+child3_2
+child3_3
+connection master_1;
+SELECT * FROM information_schema.spider_wrapper_protocols;
+for master_1
+for child2
+child2_1
+child2_2
+child2_3
+for child3
+child3_1
+child3_2
+child3_3
+
+end of test

storage/spider/mysql-test/spider/t/spider_wrapper_protocols.test

@@ -0,0 +1,16 @@
+--disable_warnings
+--disable_query_log
+--disable_result_log
+--source test_init.inc
+--enable_query_log
+
+--connection master_1
+SELECT * FROM information_schema.spider_wrapper_protocols;
+
+--disable_query_log
+--source test_deinit.inc
+--enable_result_log
+--enable_query_log
+--enable_warnings
+--echo
+--echo end of test

storage/spider/spd_db_handlersocket.cc

@@ -127,7 +127,10 @@ SPIDER_DBTON spider_dbton_handlersocket = {
   NULL,
   spider_handlersocket_create_conn,
   spider_handlersocket_support_direct_join,
-  &spider_db_handlersocket_utility
+  &spider_db_handlersocket_utility,
+  "For communicating using the handlersocket protocol",
+  "0.1.0",
+  SPIDER_MATURITY_BETA
 };
 
 #ifndef HANDLERSOCKET_MYSQL_UTIL

storage/spider/spd_db_include.h

@@ -1923,6 +1923,23 @@ enum spider_db_access_type
   SPIDER_DB_ACCESS_TYPE_NOSQL
 };
 
+#define SPIDER_MATURITY_UNKNOWN      0
+#define SPIDER_MATURITY_EXPERIMENTAL 1
+#define SPIDER_MATURITY_ALPHA        2
+#define SPIDER_MATURITY_BETA         3
+#define SPIDER_MATURITY_GAMMA        4
+#define SPIDER_MATURITY_STABLE       5
+
+static const LEX_CSTRING maturity_name[] =
+{
+  { STRING_WITH_LEN("Unknown") },
+  { STRING_WITH_LEN("Experimental") },
+  { STRING_WITH_LEN("Alpha") },
+  { STRING_WITH_LEN("Beta") },
+  { STRING_WITH_LEN("Gamma") },
+  { STRING_WITH_LEN("Stable") }
+};
+
 typedef struct st_spider_dbton
 {
   uint dbton_id;
@@ -1938,6 +1955,9 @@ typedef struct st_spider_dbton
   SPIDER_DB_CONN *(*create_db_conn)(SPIDER_CONN *conn);
   bool (*support_direct_join)();
   spider_db_util *db_util;
+  const char *descr;
+  const char *version_info;
+  unsigned int maturity;
 } SPIDER_DBTON;
 
 typedef struct st_spider_position

storage/spider/spd_db_mysql.cc

@@ -329,7 +329,10 @@ SPIDER_DBTON spider_dbton_mysql = {
   spider_mysql_create_copy_table,
   spider_mysql_create_conn,
   spider_mysql_support_direct_join,
-  &spider_db_mysql_utility
+  &spider_db_mysql_utility,
+  "For communicating to MySQL using native protocol",
+  "3.4.0",
+  SPIDER_MATURITY_STABLE
 };
 
 SPIDER_DBTON spider_dbton_mariadb = {
@@ -343,7 +346,10 @@ SPIDER_DBTON spider_dbton_mariadb = {
   spider_mariadb_create_copy_table,
   spider_mariadb_create_conn,
   spider_mariadb_support_direct_join,
-  &spider_db_mariadb_utility
+  &spider_db_mariadb_utility,
+  "For communicating to MariaDB using native protocol",
+  "3.4.0",
+  SPIDER_MATURITY_STABLE
 };
 
 spider_db_mbase_row::spider_db_mbase_row(

storage/spider/spd_db_oracle.cc

@@ -336,7 +336,10 @@ SPIDER_DBTON spider_dbton_oracle = {
   spider_oracle_create_copy_table,
   spider_oracle_create_conn,
   spider_oracle_support_direct_join,
-  &spider_db_oracle_utility
+  &spider_db_oracle_utility,
+  "For communicating Oracle using native protocol",
+  "1.0.0",
+  SPIDER_MATURITY_BETA
 };
 
 spider_db_oracle_row::spider_db_oracle_row() :

storage/spider/spd_environ.h

@@ -1,5 +1,5 @@
-/* Copyright (C) 2008-2019 Kentoku Shiba
+/* Copyright (C) 2008-2020 Kentoku Shiba
-   Copyright (C) 2017-2019 MariaDB corp
+   Copyright (C) 2017-2020 MariaDB corp
 
   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
@@ -54,4 +54,8 @@
 #define SPIDER_LIKE_FUNC_HAS_GET_NEGATED
 #define HA_HAS_CHECKSUM_EXTENDED
 #endif
+
+#if defined(MARIADB_BASE_VERSION) && MYSQL_VERSION_ID >=	100500
+#define SPIDER_I_S_USE_SHOW_FOR_COLUMN
+#endif
 #endif /* SPD_ENVIRON_INCLUDED */

storage/spider/spd_i_s.cc

@@ -1,4 +1,5 @@
-/* Copyright (C) 2012-2018 Kentoku Shiba
+/* Copyright (C) 2012-2020 Kentoku Shiba
+   Copyright (C) 2020 MariaDB corp
 
   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
@@ -45,7 +46,7 @@ static struct st_mysql_storage_engine spider_i_s_info =
 { MYSQL_INFORMATION_SCHEMA_INTERFACE_VERSION };
 
 namespace Show {
-
+#ifdef SPIDER_I_S_USE_SHOW_FOR_COLUMN
 static ST_FIELD_INFO spider_i_s_alloc_mem_fields_info[] =
 {
   Column("ID",                ULong(10),     NOT_NULL, "id"),
@@ -58,6 +59,27 @@ static ST_FIELD_INFO spider_i_s_alloc_mem_fields_info[] =
   Column("FREE_MEM_COUNT",    ULonglong(20), NULLABLE, "free_mem_count"),
   CEnd()
 };
+#else
+static ST_FIELD_INFO spider_i_s_alloc_mem_fields_info[] =
+{
+  {"ID", 10, MYSQL_TYPE_LONG, 0, MY_I_S_UNSIGNED, "id", SKIP_OPEN_TABLE},
+  {"FUNC_NAME", 64, MYSQL_TYPE_STRING, 0,
+    MY_I_S_MAYBE_NULL, "func_name", SKIP_OPEN_TABLE},
+  {"FILE_NAME", 64, MYSQL_TYPE_STRING, 0,
+    MY_I_S_MAYBE_NULL, "file_name", SKIP_OPEN_TABLE},
+  {"LINE_NO", 10, MYSQL_TYPE_LONG, 0,
+    MY_I_S_UNSIGNED | MY_I_S_MAYBE_NULL, "line_no", SKIP_OPEN_TABLE},
+  {"TOTAL_ALLOC_MEM", 20, MYSQL_TYPE_LONGLONG, 0,
+    MY_I_S_UNSIGNED | MY_I_S_MAYBE_NULL, "total_alloc_mem", SKIP_OPEN_TABLE},
+  {"CURRENT_ALLOC_MEM", 20, MYSQL_TYPE_LONGLONG, 0,
+    MY_I_S_MAYBE_NULL, "current_alloc_mem", SKIP_OPEN_TABLE},
+  {"ALLOC_MEM_COUNT", 20, MYSQL_TYPE_LONGLONG, 0,
+    MY_I_S_UNSIGNED | MY_I_S_MAYBE_NULL, "alloc_mem_count", SKIP_OPEN_TABLE},
+  {"FREE_MEM_COUNT", 20, MYSQL_TYPE_LONGLONG, 0,
+    MY_I_S_UNSIGNED | MY_I_S_MAYBE_NULL, "free_mem_count", SKIP_OPEN_TABLE},
+  {NULL, 0,  MYSQL_TYPE_STRING, 0, 0, NULL, 0}
+};
+#endif
 } // namespace Show
 
 static int spider_i_s_alloc_mem_fill_table(
@@ -163,3 +185,127 @@ struct st_maria_plugin spider_i_s_alloc_mem_maria =
   MariaDB_PLUGIN_MATURITY_STABLE,
 };
 #endif
+
+extern SPIDER_DBTON spider_dbton[SPIDER_DBTON_SIZE];
+
+namespace Show {
+#ifdef SPIDER_I_S_USE_SHOW_FOR_COLUMN
+static ST_FIELD_INFO spider_i_s_wrapper_protocols_fields_info[] =
+{
+  Column("WRAPPER_NAME",        Varchar(NAME_CHAR_LEN), NOT_NULL, ""),
+  Column("WRAPPER_VERSION",     Varchar(20),            NOT_NULL, ""),
+  Column("WRAPPER_DESCRIPTION", Longtext(65535),        NULLABLE, ""),
+  Column("WRAPPER_MATURITY",    Varchar(12),            NOT_NULL, ""),
+  CEnd()
+};
+#else
+static ST_FIELD_INFO spider_i_s_wrapper_protocols_fields_info[] =
+{
+  {"WRAPPER_NAME", NAME_CHAR_LEN, MYSQL_TYPE_STRING, 0, 0, 0, SKIP_OPEN_TABLE},
+  {"WRAPPER_VERSION", 20, MYSQL_TYPE_STRING, 0, 0, 0, SKIP_OPEN_TABLE},
+  {"WRAPPER_DESCRIPTION", 65535, MYSQL_TYPE_STRING, 0, 1, 0, SKIP_OPEN_TABLE},
+  {"WRAPPER_MATURITY", 12, MYSQL_TYPE_STRING, 0, 0, 0, SKIP_OPEN_TABLE},
+  {0, 0,  MYSQL_TYPE_STRING, 0, 0, 0, 0}
+};
+#endif
+} // namespace Show
+
+static int spider_i_s_wrapper_protocols_fill_table(
+  THD *thd,
+  TABLE_LIST *tables,
+  COND *cond
+) {
+  uint roop_count;
+  SPIDER_DBTON *dbton;
+  TABLE *table = tables->table;
+  DBUG_ENTER("spider_i_s_wrapper_protocols_fill_table");
+  for (roop_count = 0; roop_count < SPIDER_DBTON_SIZE; roop_count++)
+  {
+    dbton = &spider_dbton[roop_count];
+    if (!dbton->wrapper)
+    {
+      continue;
+    }
+    table->field[0]->store(dbton->wrapper,
+      strlen(dbton->wrapper), system_charset_info);
+    table->field[1]->store(dbton->version_info,
+      strlen(dbton->version_info), system_charset_info);
+    if (dbton->descr)
+    {
+      table->field[2]->set_notnull();
+      table->field[2]->store(dbton->descr,
+        strlen(dbton->descr), system_charset_info);
+    } else {
+      table->field[2]->set_null();
+    }
+    if (dbton->maturity <= SPIDER_MATURITY_STABLE)
+    {
+      table->field[3]->store(maturity_name[dbton->maturity].str,
+        maturity_name[dbton->maturity].length, system_charset_info);
+    } else {
+      table->field[3]->store(maturity_name[0].str,
+        maturity_name[0].length, system_charset_info);
+    }
+    if (schema_table_store_record(thd, table))
+    {
+      DBUG_RETURN(1);
+    }
+  }
+  DBUG_RETURN(0);
+}
+
+static int spider_i_s_wrapper_protocols_init(
+  void *p
+) {
+  ST_SCHEMA_TABLE *schema = (ST_SCHEMA_TABLE *) p;
+  DBUG_ENTER("spider_i_s_wrapper_protocols_init");
+  schema->fields_info = Show::spider_i_s_wrapper_protocols_fields_info;
+  schema->fill_table = spider_i_s_wrapper_protocols_fill_table;
+  schema->idx_field1 = 0;
+  DBUG_RETURN(0);
+}
+
+static int spider_i_s_wrapper_protocols_deinit(
+  void *p
+) {
+  DBUG_ENTER("spider_i_s_wrapper_protocols_deinit");
+  DBUG_RETURN(0);
+}
+
+struct st_mysql_plugin spider_i_s_wrapper_protocols =
+{
+  MYSQL_INFORMATION_SCHEMA_PLUGIN,
+  &spider_i_s_info,
+  "SPIDER_WRAPPER_PROTOCOLS",
+  "Kentoku Shiba, MariaDB Corp",
+  "Available wrapper protocols of Spider",
+  PLUGIN_LICENSE_GPL,
+  spider_i_s_wrapper_protocols_init,
+  spider_i_s_wrapper_protocols_deinit,
+  0x0001,
+  NULL,
+  NULL,
+  NULL,
+#if MYSQL_VERSION_ID >= 50600
+  0,
+#endif
+};
+
+#ifdef MARIADB_BASE_VERSION
+struct st_maria_plugin spider_i_s_wrapper_protocols_maria =
+{
+  MYSQL_INFORMATION_SCHEMA_PLUGIN,
+  &spider_i_s_info,
+  "SPIDER_WRAPPER_PROTOCOLS",
+  "Kentoku Shiba, MariaDB Corp",
+  "Available wrapper protocols of Spider",
+  PLUGIN_LICENSE_GPL,
+  spider_i_s_wrapper_protocols_init,
+  spider_i_s_wrapper_protocols_deinit,
+  0x0100,
+  NULL,
+  NULL,
+  "1.0",
+  MariaDB_PLUGIN_MATURITY_STABLE,
+};
+#endif

storage/spider/spd_init_query.h

@@ -1,5 +1,5 @@
-/* Copyright (C) 2010-2019 Kentoku Shiba
+/* Copyright (C) 2010-2020 Kentoku Shiba
-   Copyright (C) 2019 MariaDB corp
+   Copyright (C) 2019-2020 MariaDB corp
 
   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
@@ -686,6 +686,31 @@ static LEX_STRING spider_init_queries[] = {
     "      install plugin spider_alloc_mem soname 'ha_spider.dll';"
     "    end if;"
     "  end if;"
+/*
+  Install spider_wrapper_protocols plugin
+*/
+    "  set @have_spider_i_s_wrapper_protocols_plugin := 0;"
+    "  select @have_spider_i_s_wrapper_protocols_plugin := 1"
+    "    from INFORMATION_SCHEMA.plugins"
+    "    where PLUGIN_NAME = 'SPIDER_WRAPPER_PROTOCOLS';"
+    "  set @have_spider_wrapper_protocols_plugin := 0;"
+    "  select @have_spider_wrapper_protocols_plugin := 1 from mysql.plugin"
+    "    where name = 'spider_wrapper_protocols';"
+    "  if @have_spider_i_s_wrapper_protocols_plugin = 0 then"
+    "    if @have_spider_wrapper_protocols_plugin = 1 then"
+    "      /*"
+    "        spider_wrapper_protocols plugin is present in mysql.plugin but not in"
+    "        information_schema.plugins. Remove spider_wrapper_protocols plugin entry"
+    "        in mysql.plugin first."
+    "      */"
+    "      delete from mysql.plugin where name = 'spider_wrapper_protocols';"
+    "    end if;"
+    "    if @win_plugin = 0 then "
+    "      install plugin spider_wrapper_protocols soname 'ha_spider.so';"
+    "    else"
+    "      install plugin spider_wrapper_protocols soname 'ha_spider.dll';"
+    "    end if;"
+    "  end if;"
     "  set @have_spider_direct_sql_udf := 0;"
     "  select @have_spider_direct_sql_udf := 1 from mysql.func"
     "    where name = 'spider_direct_sql';"

storage/spider/spd_param.cc

@@ -35,8 +35,10 @@
 #include "spd_trx.h"
 
 extern struct st_mysql_plugin spider_i_s_alloc_mem;
+extern struct st_mysql_plugin spider_i_s_wrapper_protocols;
 #ifdef MARIADB_BASE_VERSION
 extern struct st_maria_plugin spider_i_s_alloc_mem_maria;
+extern struct st_maria_plugin spider_i_s_wrapper_protocols_maria;
 #endif
 
 extern volatile ulonglong spider_mon_table_cache_version;
@@ -3652,7 +3654,8 @@ mysql_declare_plugin(spider)
   0,
 #endif
 },
-spider_i_s_alloc_mem
+spider_i_s_alloc_mem,
+spider_i_s_wrapper_protocols
 mysql_declare_plugin_end;
 
 #ifdef MARIADB_BASE_VERSION
@@ -3672,6 +3675,7 @@ maria_declare_plugin(spider)
   SPIDER_DETAIL_VERSION,
   MariaDB_PLUGIN_MATURITY_BETA
 },
-spider_i_s_alloc_mem_maria
+spider_i_s_alloc_mem_maria,
+spider_i_s_wrapper_protocols_maria
 maria_declare_plugin_end;
 #endif