/* -*- mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; -*- * vim:expandtab:shiftwidth=2:tabstop=2:smarttab: * * Copyright (C) 2008 Sun Microsystems * * 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; either version 2 of the License, or * (at your option) any later version. * * 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 */ /* The old structures from unireg */ #ifndef DRIZZLED_STRUCTS_H #define DRIZZLED_STRUCTS_H #include #include #include class Table; class Field; typedef struct st_io_cache IO_CACHE; typedef struct st_keyfile_info { /* used with ha_info() */ unsigned char ref[MAX_REFLENGTH]; /* Pointer to current row */ unsigned char dupp_ref[MAX_REFLENGTH]; /* Pointer to dupp row */ uint32_t ref_length; /* Length of ref (1-8) */ uint32_t block_size; /* index block size */ File filenr; /* (uniq) filenr for table */ ha_rows records; /* Records i datafilen */ ha_rows deleted; /* Deleted records */ uint64_t data_file_length; /* Length off data file */ uint64_t max_data_file_length; /* Length off data file */ uint64_t index_file_length; uint64_t max_index_file_length; uint64_t delete_length; /* Free bytes */ uint64_t auto_increment_value; int errkey,sortkey; /* Last errorkey and sorted by */ time_t create_time; /* When table was created */ time_t check_time; time_t update_time; uint64_t mean_rec_length; /* physical reclength */ } KEYFILE_INFO; typedef struct st_key_part_info { /* Info about a key part */ Field *field; uint offset; /* offset in record (from 0) */ uint null_offset; /* Offset to null_bit in record */ /* Length of key part in bytes, excluding NULL flag and length bytes */ uint16_t length; /* Number of bytes required to store the keypart value. This may be different from the "length" field as it also counts - possible NULL-flag byte (see HA_KEY_NULL_LENGTH) [if null_bit != 0, the first byte stored at offset is 1 if null, 0 if non-null; the actual value is stored from offset+1]. - possible HA_KEY_BLOB_LENGTH bytes needed to store actual value length. */ uint16_t store_length; uint16_t key_type; uint16_t fieldnr; /* Fieldnum in UNIREG (1,2,3,...) */ uint16_t key_part_flag; /* 0 or HA_REVERSE_SORT */ uint8_t type; uint8_t null_bit; /* Position to null_bit */ } KEY_PART_INFO ; typedef struct st_key { uint key_length; /* Tot length of key */ enum ha_key_alg algorithm; ulong flags; /* dupp key and pack flags */ uint key_parts; /* How many key_parts */ uint32_t extra_length; uint usable_key_parts; /* Should normally be = key_parts */ uint32_t block_size; KEY_PART_INFO *key_part; char *name; /* Name of key */ /* Array of AVG(#records with the same field value) for 1st ... Nth key part. 0 means 'not known'. For temporary heap tables this member is NULL. */ ulong *rec_per_key; Table *table; LEX_STRING comment; } KEY; class JoinTable; struct RegInfo { /* Extra info about reg */ JoinTable *join_tab; /* Used by SELECT() */ enum thr_lock_type lock_type; /* How database is used */ bool not_exists_optimize; bool impossible_range; RegInfo() : join_tab(NULL), lock_type(TL_UNLOCK), not_exists_optimize(false), impossible_range(false) {} void reset() { join_tab= NULL; lock_type= TL_UNLOCK; not_exists_optimize= false; impossible_range= false; } }; struct st_read_record; /* For referense later */ class SQL_SELECT; class Session; class handler; typedef struct st_read_record { /* Parameter to read_record */ Table *table; /* Head-form */ handler *file; Table **forms; /* head and ref forms */ int (*read_record)(struct st_read_record *); Session *session; SQL_SELECT *select; uint32_t cache_records; uint32_t ref_length,struct_length,reclength,rec_cache_size,error_offset; uint32_t index; unsigned char *ref_pos; /* pointer to form->refpos */ unsigned char *record; unsigned char *rec_buf; /* to read field values after filesort */ unsigned char *cache,*cache_pos,*cache_end,*read_positions; IO_CACHE *io_cache; bool print_error, ignore_not_found_rows; JoinTable *do_insideout_scan; } READ_RECORD; extern const char *show_comp_option_name[]; typedef int *(*update_var)(Session *, struct st_mysql_show_var *); /* Bits in form->update */ #define REG_MAKE_DUPP 1 /* Make a copy of record when read */ #define REG_NEW_RECORD 2 /* Write a new record if not found */ #define REG_UPDATE 4 /* Uppdate record */ #define REG_DELETE 8 /* Delete found record */ #define REG_PROG 16 /* User is updating database */ #define REG_CLEAR_AFTER_WRITE 32 #define REG_MAY_BE_UPDATED 64 #define REG_AUTO_UPDATE 64 /* Used in D-forms for scroll-tables */ #define REG_OVERWRITE 128 #define REG_SKIP_DUP 256 /* Bits in form->status */ #define STATUS_NO_RECORD (1+2) /* Record isn't usably */ #define STATUS_GARBAGE 1 #define STATUS_NOT_FOUND 2 /* No record in database when needed */ #define STATUS_NO_PARENT 4 /* Parent record wasn't found */ #define STATUS_NOT_READ 8 /* Record isn't read */ #define STATUS_UPDATED 16 /* Record is updated by formula */ #define STATUS_NULL_ROW 32 /* table->null_row is set */ #define STATUS_DELETED 64 #endif /* DRIZZLED_STRUCTS_H */