45e0e8bb59
The enums exposed by the connector are not intended to be used by the users of the library. The fact that the protocol, and other, modules used it was in violation of how the library is intended to be used. Adding an internal mapping into MaxScale also removes some of the dependencies that the core has on the connector.
147 lines
3.6 KiB
C
147 lines
3.6 KiB
C
#pragma once
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#ifndef _MAXINFO_H
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#define _MAXINFO_H
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/*
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* Copyright (c) 2016 MariaDB Corporation Ab
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*
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* Use of this software is governed by the Business Source License included
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* in the LICENSE.TXT file and at www.mariadb.com/bsl11.
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*
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* Change Date: 2020-01-01
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*
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* On the date above, in accordance with the Business Source License, use
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* of this software will be governed by version 2 or later of the General
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* Public License.
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*/
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/**
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* @file maxinfo.h The MaxScale information schema provider
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*
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* @verbatim
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* Revision History
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*
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* Date Who Description
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* 16/02/15 Mark Riddoch Initial implementation
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*
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* @endverbatim
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*/
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#define MXS_MODULE_NAME "maxinfo"
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#include <maxscale/cdefs.h>
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#include <maxscale/service.h>
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#include <maxscale/session.h>
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#include <maxscale/spinlock.h>
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MXS_BEGIN_DECLS
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struct maxinfo_session;
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/**
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* The INFO_INSTANCE structure. There is one instane of the maxinfo "router" for
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* each service that uses the MaxScale information schema.
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*/
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typedef struct maxinfo_instance
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{
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SPINLOCK lock; /*< The instance spinlock */
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SERVICE *service; /*< The debug cli service */
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struct maxinfo_session
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*sessions; /*< Linked list of sessions within this instance */
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struct maxinfo_instance
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*next; /*< The next pointer for the list of instances */
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} INFO_INSTANCE;
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/**
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* The INFO_SESSION structure. As INFO_SESSION is created for each user that logs into
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* the MaxScale information schema.
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*/
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typedef struct maxinfo_session
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{
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MXS_SESSION *session; /*< The MaxScale session */
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DCB *dcb; /*< DCB of the client side */
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GWBUF *queue; /*< Queue for building contiguous requests */
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struct maxinfo_session
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*next; /*< The next pointer for the list of sessions */
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} INFO_SESSION;
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/**
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* The operators that can be in the parse tree
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*/
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typedef enum
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{
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MAXOP_SHOW,
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MAXOP_SELECT,
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MAXOP_TABLE,
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MAXOP_COLUMNS,
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MAXOP_ALL_COLUMNS,
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MAXOP_LITERAL,
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MAXOP_PREDICATE,
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MAXOP_LIKE,
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MAXOP_EQUAL,
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MAXOP_FLUSH,
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MAXOP_SET,
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MAXOP_CLEAR,
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MAXOP_SHUTDOWN,
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MAXOP_RESTART
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} MAXINFO_OPERATOR;
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/**
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* The Parse tree nodes for the MaxInfo parser
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*/
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typedef struct maxinfo_tree
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{
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MAXINFO_OPERATOR op; /*< The operator */
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char *value; /*< The value */
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struct maxinfo_tree *left; /*< The left hand side of the operator */
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struct maxinfo_tree *right; /*< The right hand side of the operator */
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} MAXINFO_TREE;
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#define MYSQL_COMMAND(buf) (*((uint8_t *)GWBUF_DATA(buf) + 4))
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/**
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* Token values for the tokeniser used by the parser for maxinfo
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*/
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#define LT_STRING 1
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#define LT_SHOW 2
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#define LT_LIKE 3
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#define LT_SELECT 4
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#define LT_EQUAL 5
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#define LT_COMMA 6
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#define LT_FROM 7
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#define LT_STAR 8
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#define LT_VARIABLE 9
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#define LT_FLUSH 10
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#define LT_SET 11
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#define LT_CLEAR 12
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#define LT_SHUTDOWN 13
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#define LT_RESTART 14
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/**
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* Possible parse errors
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*/
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typedef enum
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{
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PARSE_NOERROR,
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PARSE_MALFORMED_SHOW,
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PARSE_EXPECTED_LIKE,
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PARSE_SYNTAX_ERROR
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} PARSE_ERROR;
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extern MAXINFO_TREE *maxinfo_parse(char *, PARSE_ERROR *);
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extern void maxinfo_free_tree(MAXINFO_TREE *);
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extern void maxinfo_execute(DCB *, MAXINFO_TREE *);
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extern void maxinfo_send_error(DCB *, int, char *);
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extern void maxinfo_send_parse_error(DCB *, char *, PARSE_ERROR);
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extern void maxinfo_send_error(DCB *, int, char *);
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extern RESULTSET *maxinfo_variables();
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extern RESULTSET *maxinfo_status();
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MXS_END_DECLS
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#endif
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