ee52ac64a9
query_classifier.h: added parsing information structure to query classifier away from buffer.h. buffer.c:introduced a buffer object which includes object pointer and a clean-up call-back function. Buffer objects form a list which is cleaned up by the last referrer of the buffer, as a part of gwbuf_free. Buffer object list is protected by a spinlock gwbuf_lock. Also added identifier type, bufobj_id_t which is enumerated type and currently includes one value only, GWBUF_PARSING_INFO. Added also a bitfield for information about the buffer. It currently has one type only, GWBUF_INFO_PARSED indicating that buffer content is parsed and there is buffer object of type GWBUF_PARSING_INFO. skygw_utils.cc:replace_literal:changed regexec matching to case insensitive because user-defined literals are sometimes converted to upper-case ones.
83 lines
3.1 KiB
C
83 lines
3.1 KiB
C
/*
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This file is distributed as part of the SkySQL Gateway. 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 SkySQL Ab
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*/
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/** getpid */
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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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QUERY_TYPE_UNKNOWN = 0x0000, /*< Initial value, can't be tested bitwisely */
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QUERY_TYPE_LOCAL_READ = 0x0001, /*< Read non-database data, execute in MaxScale */
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QUERY_TYPE_READ = 0x0002, /*< No updates */
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QUERY_TYPE_WRITE = 0x0004, /*< Master data will be modified */
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QUERY_TYPE_SESSION_WRITE = 0x0008, /*< Session data will be modified */
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QUERY_TYPE_GLOBAL_WRITE = 0x0010, /*< Global system variable modification */
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QUERY_TYPE_BEGIN_TRX = 0x0020, /*< BEGIN or START TRANSACTION */
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QUERY_TYPE_ENABLE_AUTOCOMMIT = 0x0040, /*< SET autocommit=1 */
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QUERY_TYPE_DISABLE_AUTOCOMMIT = 0x0080, /*< SET autocommit=0 */
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QUERY_TYPE_ROLLBACK = 0x0100, /*< ROLLBACK */
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QUERY_TYPE_COMMIT = 0x0200, /*< COMMIT */
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QUERY_TYPE_PREPARE_NAMED_STMT = 0x0400, /*< Prepared stmt with name from user */
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QUERY_TYPE_PREPARE_STMT = 0x0800, /*< Prepared stmt with id provided by server */
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QUERY_TYPE_EXEC_STMT = 0x1000 /*< Execute prepared statement */
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} skygw_query_type_t;
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typedef struct parsing_info_st {
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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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/** Free THD context and close MYSQL */
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char* skygw_query_classifier_get_stmtname(MYSQL* mysql);
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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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void parsing_info_done(void* ptr);
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bool query_is_parsed(GWBUF* buf);
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EXTERN_C_BLOCK_END
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