WL#7947 Service for server sessions

This WL will provide means for a daemon and non-daemon plugins to open an
session allowing them running various server commands, SQL queries among them.

WL#8177 SQL service API

Goal of this WL is to allow to run SQL queries and get the result in the current
thread or obtained from Session service

WL#8733 Session information service

Get/set more information about session, e.g peer (client) port,
current database, etc.

include/decimal.h

@@ -36,6 +36,7 @@ typedef struct st_decimal_t {
   decimal_digit_t *buf;
 } decimal_t;
 
+#ifndef MYSQL_ABI_CHECK
 int internal_str2dec(const char *from, decimal_t *to, char **end,
                      my_bool fixed);
 int decimal2string(const decimal_t *from, char *to, int *to_len,
@@ -131,4 +132,6 @@ void max_decimal(int precision, int frac, decimal_t *to);
 #define E_DEC_ERROR            31
 #define E_DEC_FATAL_ERROR      30
 
-#endif  // DECIMAL_INCLUDED
+#endif // !MYSQL_ABI_CHECK
+
+#endif

include/mysql/com_data.h

@@ -0,0 +1,125 @@
+/* Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved.
+
+   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 the Free
+   Software Foundation; version 2 of the License.
+
+   This program is distributed in the hope that it will be useful, but WITHOUT
+   ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+   FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+   more details.
+
+   You should have received a copy of the GNU General Public License along
+   with this program; if not, write to the Free Software Foundation, Inc., 51
+   Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */
+#ifndef PLUGIN_PROTOCOL_INCLUDED
+#define PLUGIN_PROTOCOL_INCLUDED
+
+#ifndef MYSQL_ABI_CHECK
+#include "my_global.h" /* Needed for my_bool in mysql_com.h */
+#include "mysql_com.h" /* mysql_enum_shutdown_level */
+#endif
+
+
+/**
+@file
+  Definition of COM_DATA to be used with the Command service as data input
+  structure.
+*/
+
+
+typedef struct st_com_init_db_data
+{
+  const char *db_name;
+  unsigned long length;
+} COM_INIT_DB_DATA;
+
+typedef struct st_com_refresh_data
+{
+  unsigned char options;
+} COM_REFRESH_DATA;
+
+typedef struct st_com_shutdown_data
+{
+  enum mysql_enum_shutdown_level level;
+} COM_SHUTDOWN_DATA;
+
+typedef struct st_com_kill_data
+{
+  unsigned long id;
+} COM_KILL_DATA;
+
+typedef struct st_com_set_option_data
+{
+  unsigned int opt_command;
+} COM_SET_OPTION_DATA;
+
+typedef struct st_com_stmt_execute_data
+{
+  unsigned long stmt_id;
+  unsigned long flags;
+  unsigned char *params;
+  unsigned long params_length;
+} COM_STMT_EXECUTE_DATA;
+
+typedef struct st_com_stmt_fetch_data
+{
+  unsigned long stmt_id;
+  unsigned long num_rows;
+} COM_STMT_FETCH_DATA;
+
+typedef struct st_com_stmt_send_long_data_data
+{
+  unsigned long stmt_id;
+  unsigned int  param_number;
+  unsigned char *longdata;
+  unsigned long length;
+} COM_STMT_SEND_LONG_DATA_DATA;
+
+typedef struct st_com_stmt_prepare_data
+{
+  const char *query;
+  unsigned int length;
+} COM_STMT_PREPARE_DATA;
+
+typedef struct st_stmt_close_data
+{
+  unsigned int stmt_id;
+} COM_STMT_CLOSE_DATA;
+
+typedef struct st_com_stmt_reset_data
+{
+  unsigned int stmt_id;
+} COM_STMT_RESET_DATA;
+
+typedef struct st_com_query_data
+{
+  const char *query;
+  unsigned int length;
+} COM_QUERY_DATA;
+
+typedef struct st_com_field_list_data
+{
+  unsigned char   *table_name;
+  unsigned int    table_name_length;
+  const unsigned char *query;
+  unsigned int        query_length;
+} COM_FIELD_LIST_DATA;
+
+union COM_DATA {
+  COM_INIT_DB_DATA com_init_db;
+  COM_REFRESH_DATA com_refresh;
+  COM_SHUTDOWN_DATA com_shutdown;
+  COM_KILL_DATA com_kill;
+  COM_SET_OPTION_DATA com_set_option;
+  COM_STMT_EXECUTE_DATA com_stmt_execute;
+  COM_STMT_FETCH_DATA com_stmt_fetch;
+  COM_STMT_SEND_LONG_DATA_DATA com_stmt_send_long_data;
+  COM_STMT_PREPARE_DATA com_stmt_prepare;
+  COM_STMT_CLOSE_DATA com_stmt_close;
+  COM_STMT_RESET_DATA com_stmt_reset;
+  COM_QUERY_DATA com_query;
+  COM_FIELD_LIST_DATA com_field_list;
+};
+
+#endif /* PLUGIN_PROTOCOL_INCLUDED */