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Diffstat (limited to 'storage/archive/ha_archive.h')
| -rw-r--r-- | storage/archive/ha_archive.h | 163 |
1 files changed, 163 insertions, 0 deletions
diff --git a/storage/archive/ha_archive.h b/storage/archive/ha_archive.h new file mode 100644 index 00000000..2e03ac63 --- /dev/null +++ b/storage/archive/ha_archive.h @@ -0,0 +1,163 @@ +/* Copyright (c) 2003, 2011, 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 02110-1335 USA */ + +#ifdef USE_PRAGMA_INTERFACE +#pragma interface /* gcc class implementation */ +#endif + +#include <zlib.h> +#include "azlib.h" + +/* + Please read ha_archive.cc first. If you are looking for more general + answers on how storage engines work, look at ha_example.cc and + ha_example.h. +*/ + +typedef struct st_archive_record_buffer { + uchar *buffer; + uint32 length; +} archive_record_buffer; + + +class Archive_share : public Handler_share +{ +public: + mysql_mutex_t mutex; + THR_LOCK lock; + azio_stream archive_write; /* Archive file we are working with */ + ha_rows rows_recorded; /* Number of rows in tables */ + char table_name[FN_REFLEN]; + char data_file_name[FN_REFLEN]; + bool in_optimize; + bool archive_write_open; + bool dirty; /* Flag for if a flush should occur */ + bool crashed; /* Meta file is crashed */ + Archive_share(); + virtual ~Archive_share(); + int init_archive_writer(); + void close_archive_writer(); + int write_v1_metafile(); + int read_v1_metafile(); +}; + +/* + Version for file format. + 1 - Initial Version (Never Released) + 2 - Stream Compression, seperate blobs, no packing + 3 - One stream (row and blobs), with packing +*/ +#define ARCHIVE_VERSION 3 + +class ha_archive final : public handler +{ + THR_LOCK_DATA lock; /* MySQL lock */ + Archive_share *share; /* Shared lock info */ + + azio_stream archive; /* Archive file we are working with */ + my_off_t current_position; /* The position of the row we just read */ + uchar byte_buffer[IO_SIZE]; /* Initial buffer for our string */ + String buffer; /* Buffer used for blob storage */ + ha_rows scan_rows; /* Number of rows left in scan */ + bool delayed_insert; /* If the insert is delayed */ + bool bulk_insert; /* If we are performing a bulk insert */ + const uchar *current_key; + uint current_key_len; + uint current_k_offset; + archive_record_buffer *record_buffer; + bool archive_reader_open; + + archive_record_buffer *create_record_buffer(unsigned int length); + void destroy_record_buffer(archive_record_buffer *r); + int frm_copy(azio_stream *src, azio_stream *dst); + int frm_compare(azio_stream *src); + unsigned int pack_row_v1(const uchar *record); + +public: + ha_archive(handlerton *hton, TABLE_SHARE *table_arg); + ~ha_archive() = default; + const char *index_type(uint inx) { return "NONE"; } + ulonglong table_flags() const + { + return (HA_NO_TRANSACTIONS | HA_REC_NOT_IN_SEQ | HA_CAN_BIT_FIELD | + HA_BINLOG_ROW_CAPABLE | HA_BINLOG_STMT_CAPABLE | + HA_STATS_RECORDS_IS_EXACT | HA_CAN_EXPORT | + HA_HAS_RECORDS | HA_CAN_REPAIR | HA_SLOW_RND_POS | + HA_FILE_BASED | HA_CAN_INSERT_DELAYED | HA_CAN_GEOMETRY); + } + ulong index_flags(uint idx, uint part, bool all_parts) const + { + return HA_ONLY_WHOLE_INDEX; + } + virtual void get_auto_increment(ulonglong offset, ulonglong increment, + ulonglong nb_desired_values, + ulonglong *first_value, + ulonglong *nb_reserved_values); + uint max_supported_keys() const { return 1; } + uint max_supported_key_length() const { return sizeof(ulonglong); } + uint max_supported_key_part_length() const { return sizeof(ulonglong); } + ha_rows records() { return share->rows_recorded; } + int index_init(uint keynr, bool sorted); + virtual int index_read(uchar * buf, const uchar * key, + uint key_len, enum ha_rkey_function find_flag); + virtual int index_read_idx(uchar * buf, uint index, const uchar * key, + uint key_len, enum ha_rkey_function find_flag); + int index_next(uchar * buf); + int open(const char *name, int mode, uint test_if_locked); + int close(void); + int write_row(const uchar * buf); + int real_write_row(const uchar *buf, azio_stream *writer); + int truncate(); + int rnd_init(bool scan=1); + int rnd_next(uchar *buf); + int rnd_pos(uchar * buf, uchar *pos); + int get_row(azio_stream *file_to_read, uchar *buf); + int get_row_version2(azio_stream *file_to_read, uchar *buf); + int get_row_version3(azio_stream *file_to_read, uchar *buf); + Archive_share *get_share(const char *table_name, int *rc); + int init_archive_reader(); + // Always try auto_repair in case of HA_ERR_CRASHED_ON_USAGE + bool auto_repair(int error) const + { return error == HA_ERR_CRASHED_ON_USAGE; } + int read_data_header(azio_stream *file_to_read); + void position(const uchar *record); + int info(uint); + int extra(enum ha_extra_function operation); + void update_create_info(HA_CREATE_INFO *create_info); + int create(const char *name, TABLE *form, HA_CREATE_INFO *create_info); + int optimize(THD* thd, HA_CHECK_OPT* check_opt); + int repair(THD* thd, HA_CHECK_OPT* check_opt); + int check_for_upgrade(HA_CHECK_OPT *check_opt); + void start_bulk_insert(ha_rows rows, uint flags); + int end_bulk_insert(); + enum row_type get_row_type() const + { + return ROW_TYPE_COMPRESSED; + } + THR_LOCK_DATA **store_lock(THD *thd, THR_LOCK_DATA **to, + enum thr_lock_type lock_type); + bool is_crashed() const; + int check(THD* thd, HA_CHECK_OPT* check_opt); + bool check_and_repair(THD *thd); + uint32 max_row_length(const uchar *buf); + bool fix_rec_buff(unsigned int length); + int unpack_row(azio_stream *file_to_read, uchar *record); + unsigned int pack_row(const uchar *record, azio_stream *writer); + bool check_if_incompatible_data(HA_CREATE_INFO *info, uint table_changes); + int external_lock(THD *thd, int lock_type); +private: + void flush_and_clear_pending_writes(); +}; + |