130 lines
4.9 KiB
C
130 lines
4.9 KiB
C
#ifndef QUERY_CLASSIFIER_HG
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#define QUERY_CLASSIFIER_HG
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/*
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This file is distributed as part of the MariaDB Corporation MaxScale. It is free
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software: you can redistribute it and/or modify it under the terms of the
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GNU General Public License as published by the Free Software Foundation,
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version 2.
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This program is distributed in the hope that it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
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details.
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You should have received a copy of the GNU General Public License along with
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this program; if not, write to the Free Software Foundation, Inc., 51
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Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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Copyright MariaDB Corporation Ab
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*/
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/** getpid */
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#include <my_config.h>
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#include <unistd.h>
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#include <mysql.h>
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#include <skygw_utils.h>
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#include <buffer.h>
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EXTERN_C_BLOCK_BEGIN
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/**
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* Query type for skygateway.
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* The meaninful difference is where operation is done and whether master data
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* is modified
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*/
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typedef enum
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{
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QUERY_TYPE_UNKNOWN = 0x000000, /*< Initial value, can't be tested bitwisely */
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QUERY_TYPE_LOCAL_READ = 0x000001, /*< Read non-database data, execute in MaxScale:any */
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QUERY_TYPE_READ = 0x000002, /*< Read database data:any */
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QUERY_TYPE_WRITE = 0x000004, /*< Master data will be modified:master */
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QUERY_TYPE_MASTER_READ = 0x000008, /*< Read from the master:master */
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QUERY_TYPE_SESSION_WRITE = 0x000010, /*< Session data will be modified:master or all */
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/** Not implemented yet */
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// QUERY_TYPE_USERVAR_WRITE = 0x000020, /*< Write a user variable:master or all */
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QUERY_TYPE_USERVAR_READ = 0x000040, /*< Read a user variable:master or any */
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QUERY_TYPE_SYSVAR_READ = 0x000080, /*< Read a system variable:master or any */
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/** Not implemented yet */
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// QUERY_TYPE_SYSVAR_WRITE = 0x000100, /*< Write a system variable:master or all */
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QUERY_TYPE_GSYSVAR_READ = 0x000200, /*< Read global system variable:master or any */
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QUERY_TYPE_GSYSVAR_WRITE = 0x000400, /*< Write global system variable:master or all */
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QUERY_TYPE_BEGIN_TRX = 0x000800, /*< BEGIN or START TRANSACTION */
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QUERY_TYPE_ENABLE_AUTOCOMMIT = 0x001000, /*< SET autocommit=1 */
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QUERY_TYPE_DISABLE_AUTOCOMMIT = 0x002000, /*< SET autocommit=0 */
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QUERY_TYPE_ROLLBACK = 0x004000, /*< ROLLBACK */
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QUERY_TYPE_COMMIT = 0x008000, /*< COMMIT */
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QUERY_TYPE_PREPARE_NAMED_STMT = 0x010000, /*< Prepared stmt with name from user:all */
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QUERY_TYPE_PREPARE_STMT = 0x020000, /*< Prepared stmt with id provided by server:all */
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QUERY_TYPE_EXEC_STMT = 0x040000, /*< Execute prepared statement:master or any */
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QUERY_TYPE_CREATE_TMP_TABLE = 0x080000, /*< Create temporary table:master (could be all) */
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QUERY_TYPE_READ_TMP_TABLE = 0x100000, /*< Read temporary table:master (could be any) */
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QUERY_TYPE_SHOW_DATABASES = 0x200000, /*< Show list of databases */
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QUERY_TYPE_SHOW_TABLES = 0x400000 /*< Show list of tables */
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} skygw_query_type_t;
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typedef enum
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{
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QUERY_OP_UNDEFINED = 0,
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QUERY_OP_SELECT = 1,
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QUERY_OP_UPDATE = (1 << 1),
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QUERY_OP_INSERT = (1 << 2),
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QUERY_OP_DELETE = (1 << 3),
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QUERY_OP_INSERT_SELECT = (1 << 4),
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QUERY_OP_TRUNCATE = (1 << 5),
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QUERY_OP_ALTER_TABLE = (1 << 6),
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QUERY_OP_CREATE_TABLE = (1 << 7),
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QUERY_OP_CREATE_INDEX = (1 << 8),
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QUERY_OP_DROP_TABLE = (1 << 9),
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QUERY_OP_DROP_INDEX = (1 << 10),
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QUERY_OP_CHANGE_DB = (1 << 11),
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QUERY_OP_LOAD = (1 << 12)
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} skygw_query_op_t;
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typedef struct parsing_info_st
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{
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#if defined(SS_DEBUG)
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skygw_chk_t pi_chk_top;
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#endif
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void* pi_handle; /*< parsing info object pointer */
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char* pi_query_plain_str; /*< query as plain string */
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void (*pi_done_fp)(void *); /*< clean-up function for parsing info */
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#if defined(SS_DEBUG)
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skygw_chk_t pi_chk_tail;
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#endif
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} parsing_info_t;
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#define QUERY_IS_TYPE(mask,type) ((mask & type) == type)
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/**
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* Create THD and use it for creating parse tree. Examine parse tree and
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* classify the query.
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*/
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skygw_query_type_t query_classifier_get_type(GWBUF* querybuf);
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skygw_query_op_t query_classifier_get_operation(GWBUF* querybuf);
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#if defined(NOT_USED)
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char* skygw_query_classifier_get_stmtname(GWBUF* buf);
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#endif
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char* skygw_get_created_table_name(GWBUF* querybuf);
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bool is_drop_table_query(GWBUF* querybuf);
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bool skygw_is_real_query(GWBUF* querybuf);
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char** skygw_get_table_names(GWBUF* querybuf, int* tblsize, bool fullnames);
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char* skygw_get_canonical(GWBUF* querybuf);
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bool parse_query(GWBUF* querybuf);
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parsing_info_t* parsing_info_init(void (*donefun)(void *));
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/** Free THD context and close MYSQL */
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void parsing_info_done(void* ptr);
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bool query_is_parsed(GWBUF* buf);
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bool skygw_query_has_clause(GWBUF* buf);
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char* skygw_get_qtype_str(skygw_query_type_t qtype);
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char* skygw_get_affected_fields(GWBUF* buf);
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char** skygw_get_database_names(GWBUF* querybuf, int* size);
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EXTERN_C_BLOCK_END
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#endif
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