/* Copyright (c) 2000-2008 MySQL AB, 2008-2010 Sun Microsystems, Inc. Use is subject to license terms. 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 02110-1301 USA */ /* The old structures from unireg */ struct st_table; class Field; typedef struct st_date_time_format { uchar positions[8]; char time_separator; /* Separator between hour and minute */ uint flag; /* For future */ LEX_STRING format; } DATE_TIME_FORMAT; typedef struct st_keyfile_info { /* used with ha_info() */ uchar ref[MAX_REFLENGTH]; /* Pointer to current row */ uchar dupp_ref[MAX_REFLENGTH]; /* Pointer to dupp row */ uint ref_length; /* Length of ref (1-8) */ uint block_size; /* index block size */ File filenr; /* (uniq) filenr for table */ ha_rows records; /* Records i datafilen */ ha_rows deleted; /* Deleted records */ ulonglong data_file_length; /* Length off data file */ ulonglong max_data_file_length; /* Length off data file */ ulonglong index_file_length; ulonglong max_index_file_length; ulonglong delete_length; /* Free bytes */ ulonglong 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; ulong 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 */ uint16 length; /* Length of keypart value in bytes */ /* 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) - possible HA_KEY_BLOB_LENGTH bytes needed to store actual value length. */ uint16 store_length; uint16 key_type; uint16 fieldnr; /* Fieldnum in UNIREG */ uint16 key_part_flag; /* 0 or HA_REVERSE_SORT */ uint8 type; uint8 null_bit; /* Position to null_bit */ } KEY_PART_INFO ; typedef struct st_key { uint key_length; /* Tot length of key */ ulong flags; /* dupp key and pack flags */ uint key_parts; /* How many key_parts */ uint extra_length; uint usable_key_parts; /* Should normally be = key_parts */ uint block_size; enum ha_key_alg algorithm; /* Note that parser is used when the table is opened for use, and parser_name is used when the table is being created. */ union { plugin_ref parser; /* Fulltext [pre]parser */ LEX_STRING *parser_name; /* Fulltext [pre]parser name */ }; 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; union { int bdb_return_if_eq; } handler; struct st_table *table; } KEY; struct st_join_table; typedef struct st_reginfo { /* Extra info about reg */ struct st_join_table *join_tab; /* Used by SELECT() */ enum thr_lock_type lock_type; /* How database is used */ bool not_exists_optimize; /* TRUE <=> range optimizer found that there is no rows satisfying table conditions. */ bool impossible_range; } REGINFO; class SQL_SELECT; class THD; class handler; struct st_join_table; void rr_unlock_row(st_join_table *tab); struct READ_RECORD { /* Parameter to read_record */ typedef int (*Read_func)(READ_RECORD*); typedef void (*Unlock_row_func)(st_join_table *); struct st_table *table; /* Head-form */ handler *file; struct st_table **forms; /* head and ref forms */ Read_func read_record; Unlock_row_func unlock_row; THD *thd; SQL_SELECT *select; uint cache_records; uint ref_length,struct_length,reclength,rec_cache_size,error_offset; uint index; uchar *ref_pos; /* pointer to form->refpos */ uchar *record; uchar *rec_buf; /* to read field values after filesort */ uchar *cache,*cache_pos,*cache_end,*read_positions; IO_CACHE *io_cache; bool print_error, ignore_not_found_rows; }; /* Originally MySQL used MYSQL_TIME structure inside server only, but since 4.1 it's exported to user in the new client API. Define aliases for new names to keep existing code simple. */ typedef enum enum_mysql_timestamp_type timestamp_type; typedef struct { ulong year,month,day,hour; ulonglong minute,second,second_part; bool neg; } INTERVAL; typedef struct st_known_date_time_format { const char *format_name; const char *date_format; const char *datetime_format; const char *time_format; } KNOWN_DATE_TIME_FORMAT; enum SHOW_COMP_OPTION { SHOW_OPTION_YES, SHOW_OPTION_NO, SHOW_OPTION_DISABLED}; extern const char *show_comp_option_name[]; typedef int *(*update_var)(THD *, struct st_mysql_show_var *); typedef struct st_lex_user { LEX_STRING user, host, password; } LEX_USER; /* This structure specifies the maximum amount of resources which can be consumed by each account. Zero value of a member means there is no limit. */ typedef struct user_resources { /* Maximum number of queries/statements per hour. */ uint questions; /* Maximum number of updating statements per hour (which statements are updating is defined by sql_command_flags array). */ uint updates; /* Maximum number of connections established per hour. */ uint conn_per_hour; /* Maximum number of concurrent connections. */ uint user_conn; /* Values of this enum and specified_limits member are used by the parser to store which user limits were specified in GRANT statement. */ enum {QUERIES_PER_HOUR= 1, UPDATES_PER_HOUR= 2, CONNECTIONS_PER_HOUR= 4, USER_CONNECTIONS= 8}; uint specified_limits; } USER_RESOURCES; /* This structure is used for counting resources consumed and for checking them against specified user limits. */ typedef struct user_conn { /* Pointer to user+host key (pair separated by '\0') defining the entity for which resources are counted (By default it is user account thus priv_user/priv_host pair is used. If --old-style-user-limits option is enabled, resources are counted for each user+host separately). */ char *user; /* Pointer to host part of the key. */ char *host; /** The moment of time when per hour counters were reset last time (i.e. start of "hour" for conn_per_hour, updates, questions counters). */ ulonglong reset_utime; /* Total length of the key. */ uint len; /* Current amount of concurrent connections for this account. */ uint connections; /* Current number of connections per hour, number of updating statements per hour and total number of statements per hour for this account. */ uint conn_per_hour, updates, questions; /* Maximum amount of resources which account is allowed to consume. */ USER_RESOURCES user_resources; } USER_CONN; /* 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 /* Such interval is "discrete": it is the set of { auto_inc_interval_min + k * increment, 0 <= k <= (auto_inc_interval_values-1) } Where "increment" is maintained separately by the user of this class (and is currently only thd->variables.auto_increment_increment). It mustn't derive from Sql_alloc, because SET INSERT_ID needs to allocate memory which must stay allocated for use by the next statement. */ class Discrete_interval { private: ulonglong interval_min; ulonglong interval_values; ulonglong interval_max; // excluded bound. Redundant. public: Discrete_interval *next; // used when linked into Discrete_intervals_list void replace(ulonglong start, ulonglong val, ulonglong incr) { interval_min= start; interval_values= val; interval_max= (val == ULONGLONG_MAX) ? val : start + val * incr; } Discrete_interval(ulonglong start, ulonglong val, ulonglong incr) : next(NULL) { replace(start, val, incr); }; Discrete_interval() : next(NULL) { replace(0, 0, 0); }; ulonglong minimum() const { return interval_min; }; ulonglong values() const { return interval_values; }; ulonglong maximum() const { return interval_max; }; /* If appending [3,5] to [1,2], we merge both in [1,5] (they should have the same increment for that, user of the class has to ensure that). That is just a space optimization. Returns 0 if merge succeeded. */ bool merge_if_contiguous(ulonglong start, ulonglong val, ulonglong incr) { if (interval_max == start) { if (val == ULONGLONG_MAX) { interval_values= interval_max= val; } else { interval_values+= val; interval_max= start + val * incr; } return 0; } return 1; }; }; /* List of Discrete_interval objects */ class Discrete_intervals_list { private: Discrete_interval *head; Discrete_interval *tail; /* When many intervals are provided at the beginning of the execution of a statement (in a replication slave or SET INSERT_ID), "current" points to the interval being consumed by the thread now (so "current" goes from "head" to "tail" then to NULL). */ Discrete_interval *current; uint elements; // number of elements void set_members(Discrete_interval *h, Discrete_interval *t, Discrete_interval *c, uint el) { head= h; tail= t; current= c; elements= el; } void operator=(Discrete_intervals_list &); /* prevent use of these */ Discrete_intervals_list(const Discrete_intervals_list &); public: Discrete_intervals_list() : head(NULL), current(NULL), elements(0) {}; void empty_no_free() { set_members(NULL, NULL, NULL, 0); } void empty() { for (Discrete_interval *i= head; i;) { Discrete_interval *next= i->next; delete i; i= next; } empty_no_free(); } void copy_shallow(const Discrete_intervals_list * dli) { head= dli->get_head(); tail= dli->get_tail(); current= dli->get_current(); elements= dli->nb_elements(); } void swap (Discrete_intervals_list * dli) { Discrete_interval *h, *t, *c; uint el; h= dli->get_head(); t= dli->get_tail(); c= dli->get_current(); el= dli->nb_elements(); dli->copy_shallow(this); set_members(h, t, c, el); } const Discrete_interval* get_next() { Discrete_interval *tmp= current; if (current != NULL) current= current->next; return tmp; } ~Discrete_intervals_list() { empty(); }; bool append(ulonglong start, ulonglong val, ulonglong incr); bool append(Discrete_interval *interval); ulonglong minimum() const { return (head ? head->minimum() : 0); }; ulonglong maximum() const { return (head ? tail->maximum() : 0); }; uint nb_elements() const { return elements; } Discrete_interval* get_head() const { return head; }; Discrete_interval* get_tail() const { return tail; }; Discrete_interval* get_current() const { return current; }; };