mariadb/sql/mysql_priv.h

/* Copyright (C) 2000 MySQL AB & MySQL Finland AB & TCX DataKonsult AB

   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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA */

#ifndef _MYSQL_PRIV_H
#define _MYSQL_PRIV_H

#include <global.h>
#include <my_sys.h>
#include <m_string.h>
#include "mysql_version.h"
#include <hash.h>
#include <signal.h>
#include <thr_lock.h>
#include <my_base.h>			/* Needed by field.h */
#include <my_bitmap.h>
#include <violite.h>

#ifdef __EMX__
#undef write  // remove pthread.h macro definition for EMX
#endif

typedef ulong table_map;		/* Used for table bits in join */
typedef ulong key_map;			/* Used for finding keys */
typedef ulong key_part_map;		/* Used for finding key parts */

#include "mysql_com.h"
#include "unireg.h"

void init_sql_alloc(MEM_ROOT *root, uint block_size, uint pre_alloc_size);
gptr sql_alloc(unsigned size);
gptr sql_calloc(unsigned size);
char *sql_strdup(const char *str);
char *sql_strmake(const char *str,uint len);
gptr sql_memdup(const void * ptr,unsigned size);
void sql_element_free(void *ptr);
void kill_one_thread(THD *thd, ulong id);

#define x_free(A)	{ my_free((gptr) (A),MYF(MY_WME | MY_FAE | MY_ALLOW_ZERO_PTR)); }
#define safeFree(x)	{ if(x) { my_free((gptr) x,MYF(0)); x = NULL; } }
#define PREV_BITS(type,A)	((type) (((type) 1 << (A)) -1))
#define all_bits_set(A,B) ((A) & (B) != (B))

#ifndef LL
#ifdef HAVE_LONG_LONG
#define LL(A) A ## LL
#else
#define LL(A) A ## L
#endif
#endif

/***************************************************************************
  Configuration parameters
****************************************************************************/

#define ACL_CACHE_SIZE		256
#define HASH_PASSWORD_LENGTH	16
#define HOST_CACHE_SIZE		128
#define MAX_ACCEPT_RETRY	10	// Test accept this many times
#define MAX_BLOB_WIDTH		8192	// Default width for blob
#define MAX_FIELDS_BEFORE_HASH	32
#define USER_VARS_HASH_SIZE     16
#define STACK_MIN_SIZE		8192	// Abort if less stack during eval.
#define STACK_BUFF_ALLOC	32	// For stack overrun checks
#ifndef MYSQLD_NET_RETRY_COUNT
#define MYSQLD_NET_RETRY_COUNT  10	// Abort read after this many int.
#endif
#define TEMP_POOL_SIZE          128
/*
  The following parameters is to decide when to use an extra cache to
   optimise seeks when reading a big table in sorted order
*/
#define MIN_FILE_LENGTH_TO_USE_ROW_CACHE (16L*1024*1024)
#define MIN_ROWS_TO_USE_TABLE_CACHE	 100

/*
  The following is used to decide if MySQL should use table scanning
  instead of reading with keys.  The number says how many evaluation of the
  WHERE clause is comparable to reading one extra row from a table.
*/
#define TIME_FOR_COMPARE   5	// 5 compares == one read

/*
  Number of rows in a reference table when refereed through a not unique key.
  This value is only used when we don't know anything about the key
  distribution.
*/
#define MATCHING_ROWS_IN_OTHER_TABLE 10

/* Don't pack string keys shorter than this (if PACK_KEYS=1 isn't used) */
#define KEY_DEFAULT_PACK_LENGTH 8

/* Characters shown for the command in 'show processlist' */
#define PROCESS_LIST_WIDTH 100

/* Time handling defaults */
#define TIMESTAMP_MAX_YEAR 2038
#define YY_PART_YEAR	   70
#define PRECISION_FOR_DOUBLE 53
#define PRECISION_FOR_FLOAT  24

/* The following can also be changed from the command line */
#define CONNECT_TIMEOUT		5		// Do not wait long for connect
#define DEFAULT_CONCURRENCY	10
#define DELAYED_LIMIT		100		/* pause after xxx inserts */
#define DELAYED_QUEUE_SIZE	1000
#define DELAYED_WAIT_TIMEOUT	5*60		/* Wait for delayed insert */
#define FLUSH_TIME		0		/* Don't flush tables */
#define MAX_CONNECT_ERRORS	10		// errors before disabling host

#if defined(__WIN__) || defined(OS2)
#define IF_WIN(A,B) (A)
#undef	FLUSH_TIME
#define FLUSH_TIME	1800			/* Flush every half hour */

#define INTERRUPT_PRIOR -2
#define CONNECT_PRIOR	-1
#define WAIT_PRIOR	0
#define QUERY_PRIOR	2
#else
#define IF_WIN(A,B) (B)
#define INTERRUPT_PRIOR 10
#define CONNECT_PRIOR	9
#define WAIT_PRIOR	8
#define QUERY_PRIOR	6
#endif /* __WIN92__ */

	/* Bits from testflag */
#define TEST_PRINT_CACHED_TABLES 1
#define TEST_NO_KEY_GROUP	 2
#define TEST_MIT_THREAD		4
#define TEST_BLOCKING		8
#define TEST_KEEP_TMP_TABLES	16
#define TEST_NO_THREADS		32	/* For debugging under Linux */
#define TEST_READCHECK		64	/* Force use of readcheck */
#define TEST_NO_EXTRA		128
#define TEST_CORE_ON_SIGNAL	256	/* Give core if signal */
#define TEST_NO_STACKTRACE	512

/* options for select set by the yacc parser (stored in lex->options) */
#define SELECT_DISTINCT		1
#define SELECT_STRAIGHT_JOIN	2
#define SELECT_DESCRIBE		4
#define SELECT_SMALL_RESULT	8
#define SELECT_BIG_RESULT	16
#define SELECT_HIGH_PRIORITY	64		/* Intern */
#define SELECT_USE_CACHE	256		/* Intern */
#define SELECT_COUNT_DISTINCT	512		/* Intern */

#define OPTION_BIG_TABLES	512		/* for SQL OPTION */
#define OPTION_BIG_SELECTS	1024		/* for SQL OPTION */
#define OPTION_LOG_OFF		2048
#define OPTION_UPDATE_LOG	4096		/* update log flag */
#define OPTION_LOW_PRIORITY_UPDATES	8192
#define OPTION_WARNINGS		16384
#define OPTION_AUTO_IS_NULL	32768
#define OPTION_FOUND_COMMENT	65536L
#define OPTION_SAFE_UPDATES	OPTION_FOUND_COMMENT*2
#define OPTION_BUFFER_RESULT	OPTION_SAFE_UPDATES*2
#define OPTION_BIN_LOG          OPTION_BUFFER_RESULT*2
#define OPTION_NOT_AUTO_COMMIT	OPTION_BIN_LOG*2
#define OPTION_BEGIN		OPTION_NOT_AUTO_COMMIT*2
#define OPTION_TABLE_LOCK	OPTION_BEGIN*2
#define OPTION_QUICK		OPTION_TABLE_LOCK*2
#define OPTION_QUOTE_SHOW_CREATE OPTION_QUICK*2
#define OPTION_INTERNAL_SUBTRANSACTIONS OPTION_QUOTE_SHOW_CREATE*2

/* Set if we are updating a non-transaction safe table */
#define OPTION_STATUS_NO_TRANS_UPDATE OPTION_INTERNAL_SUBTRANSACTIONS*2

/* The following is set when parsing the query */
#define QUERY_NO_INDEX_USED		OPTION_STATUS_NO_TRANS_UPDATE*2
#define QUERY_NO_GOOD_INDEX_USED	QUERY_NO_INDEX_USED*2
/* The following can be set when importing tables in a 'wrong order'
   to suppress foreign key checks */
#define OPTION_NO_FOREIGN_KEY_CHECKS  QUERY_NO_GOOD_INDEX_USED*2
/* The following speeds up inserts to InnoDB tables by suppressing unique
   key checks in some cases */
#define OPTION_RELAXED_UNIQUE_CHECKS  OPTION_NO_FOREIGN_KEY_CHECKS*2
/* NOTE: we have now used 31 bits of the OPTION flag! */

/* Bits for different SQL modes modes (including ANSI mode) */
#define MODE_REAL_AS_FLOAT      1
#define MODE_PIPES_AS_CONCAT    2
#define MODE_ANSI_QUOTES        4
#define MODE_IGNORE_SPACE	8
#define MODE_SERIALIZABLE	16
#define MODE_ONLY_FULL_GROUP_BY	32

#define RAID_BLOCK_SIZE 1024

/* BINLOG_DUMP options */

#define BINLOG_DUMP_NON_BLOCK   1

/* sql_show.cc:show_log_files() */
#define SHOW_LOG_STATUS_FREE "FREE"
#define SHOW_LOG_STATUS_INUSE "IN USE"

/* Some portable defines */

#define portable_sizeof_char_ptr 8

#define tmp_file_prefix "#sql"			/* Prefix for tmp tables */
#define tmp_file_prefix_length 4

struct st_table;
class THD;

/* Struct to handle simple linked lists */

typedef struct st_sql_list {
  uint elements;
  byte *first;
  byte **next;
} SQL_LIST;


uint nr_of_decimals(const char *str);		/* Neaded by sql_string.h */

extern pthread_key(THD*, THR_THD);
inline THD *_current_thd(void)
{
  return my_pthread_getspecific_ptr(THD*,THR_THD);
}
#define current_thd _current_thd()

#include "sql_string.h"
#include "sql_list.h"
#include "sql_map.h"
#include "handler.h"
#include "table.h"
#include "field.h"				/* Field definitions */
#include "sql_udf.h"
#include "item.h"
#include "sql_class.h"
#include "opt_range.h"


void mysql_create_db(THD *thd, char *db, uint create_info);
void mysql_binlog_send(THD* thd, char* log_ident, ulong pos, ushort flags);
int mysql_rm_table(THD *thd,TABLE_LIST *tables, my_bool if_exists);
int quick_rm_table(enum db_type base,const char *db,
		   const char *table_name);
bool mysql_rename_tables(THD *thd, TABLE_LIST *table_list);
bool mysql_change_db(THD *thd,const char *name);
void mysql_parse(THD *thd,char *inBuf,uint length);
void mysql_init_select(LEX *lex);
void init_max_user_conn(void);
void free_max_user_conn(void);
pthread_handler_decl(handle_one_connection,arg);
pthread_handler_decl(handle_bootstrap,arg);
sig_handler end_thread_signal(int sig);
void end_thread(THD *thd,bool put_in_cache);
void flush_thread_cache();
void mysql_execute_command(void);
bool do_command(THD *thd);
bool check_stack_overrun(THD *thd,char *dummy);
bool reload_acl_and_cache(THD *thd, uint options, TABLE_LIST *tables);
void mysql_rm_db(THD *thd,char *db,bool if_exists);
void table_cache_init(void);
void table_cache_free(void);
uint cached_tables(void);
void kill_mysql(void);
void close_connection(NET *net,uint errcode=0,bool lock=1);
bool check_access(THD *thd,uint access,const char *db=0,uint *save_priv=0,
		  bool no_grant=0);
bool check_table_access(THD *thd,uint want_access,TABLE_LIST *tables);
bool check_process_priv(THD *thd=0);

int generate_table(THD *thd, TABLE_LIST *table_list,
		   TABLE *locked_table);


int mysql_backup_table(THD* thd, TABLE_LIST* table_list);
int mysql_restore_table(THD* thd, TABLE_LIST* table_list);

int mysql_check_table(THD* thd, TABLE_LIST* table_list,
		      HA_CHECK_OPT* check_opt);
int mysql_repair_table(THD* thd, TABLE_LIST* table_list,
		       HA_CHECK_OPT* check_opt);
int mysql_analyze_table(THD* thd, TABLE_LIST* table_list,
			HA_CHECK_OPT* check_opt);
int mysql_optimize_table(THD* thd, TABLE_LIST* table_list,
			 HA_CHECK_OPT* check_opt);

/* net_pkg.c */
void send_error(NET *net,uint sql_errno=0, const char *err=0);
void send_warning(NET *net, uint sql_errno, const char *err=0);
void net_printf(NET *net,uint sql_errno, ...);
void send_ok(NET *net,ha_rows affected_rows=0L,ulonglong id=0L,
	     const char *info=0);
void send_eof(NET *net,bool no_flush=0);
char *net_store_length(char *packet,ulonglong length);
char *net_store_length(char *packet,uint length);
char *net_store_data(char *to,const char *from);
char *net_store_data(char *to,int32 from);
char *net_store_data(char *to,longlong from);

bool net_store_null(String *packet);
bool net_store_data(String *packet,uint32 from);
bool net_store_data(String *packet,longlong from);
bool net_store_data(String *packet,const char *from);
bool net_store_data(String *packet,const char *from,uint length);
bool net_store_data(String *packet,struct tm *tmp);
bool net_store_data(String* packet, I_List<i_string>* str_list);
bool net_store_data(String *packet,CONVERT *convert, const char *from,
		    uint length);
bool net_store_data(String *packet, CONVERT *convert, const char *from);

SORT_FIELD * make_unireg_sortorder(ORDER *order, uint *length);
int setup_order(THD *thd,TABLE_LIST *tables, List<Item> &fields,
                List <Item> &all_fields, ORDER *order);

int mysql_select(THD *thd,TABLE_LIST *tables,List<Item> &list,COND *conds,
		 ORDER *order, ORDER *group,Item *having,ORDER *proc_param,
		 uint select_type,select_result *result);
Field *create_tmp_field(TABLE *table,Item *item, Item::Type type,
			Item_result_field ***copy_func, Field **from_field,
			bool group,bool modify_item);
int mysql_create_table(THD *thd,const char *db, const char *table_name,
		       HA_CREATE_INFO *create_info,
		       List<create_field> &fields, List<Key> &keys,
		       bool tmp_table, bool no_log);
// no_log is needed for the case of CREATE TABLE ... SELECT , as the logging
// will be done later in sql_insert.cc

TABLE *create_table_from_items(THD *thd, HA_CREATE_INFO *create_info,
			       const char *db, const char *name,
			       List<create_field> *extra_fields,
			       List<Key> *keys,
			       List<Item> *items,
			       MYSQL_LOCK **lock);
int mysql_alter_table(THD *thd, char *new_db, char *new_name,
		      HA_CREATE_INFO *create_info,
		      TABLE_LIST *table_list,
		      List<create_field> &fields,
		      List<Key> &keys,List<Alter_drop> &drop_list,
		      List<Alter_column> &alter_list,
                      ORDER *order,
		      bool drop_primary,
		      enum enum_duplicates handle_duplicates);
bool mysql_rename_table(enum db_type base,
			const char *old_db,
			const char * old_name,
			const char *new_db,
			const char * new_name);
bool close_cached_table(THD *thd,TABLE *table);
int mysql_create_index(THD *thd, TABLE_LIST *table_list, List<Key> &keys);
int mysql_drop_index(THD *thd, TABLE_LIST *table_list,
		     List<Alter_drop> &drop_list);
int mysql_update(THD *thd,TABLE_LIST *tables,List<Item> &fields,
		 List<Item> &values,COND *conds, ha_rows limit,
		 enum enum_duplicates handle_duplicates,
		 thr_lock_type lock_type);
int mysql_insert(THD *thd,TABLE_LIST *table,List<Item> &fields,
		 List<List_item> &values, enum_duplicates flag,
		 thr_lock_type lock_type);
void kill_delayed_threads(void);
int mysql_delete(THD *thd,TABLE_LIST *table,COND *conds,ha_rows rows,
		 thr_lock_type lock_type, ulong options);
TABLE *open_ltable(THD *thd, TABLE_LIST *table_list, thr_lock_type update);
TABLE *open_table(THD *thd,const char *db,const char *table,const char *alias,
		  bool *refresh);
TABLE *reopen_name_locked_table(THD* thd, TABLE_LIST* table);
TABLE *find_locked_table(THD *thd, const char *db,const char *table_name);
bool reopen_table(TABLE *table,bool locked=0);
bool reopen_tables(THD *thd,bool get_locks,bool in_refresh);
void close_old_data_files(THD *thd, TABLE *table, bool abort_locks,
			  bool send_refresh);
bool close_data_tables(THD *thd,const char *db, const char *table_name);
bool wait_for_tables(THD *thd);
bool table_is_used(TABLE *table, bool wait_for_name_lock);
bool drop_locked_tables(THD *thd,const char *db, const char *table_name);
void abort_locked_tables(THD *thd,const char *db, const char *table_name);
Field *find_field_in_tables(THD *thd,Item_field *item,TABLE_LIST *tables);
Field *find_field_in_table(THD *thd,TABLE *table,const char *name,uint length,
			   bool check_grant,bool allow_rowid);

/* sql_do.cc */
int mysql_do(THD *thd, List<Item> &values);

/* sql_list.c */
int mysqld_show_dbs(THD *thd,const char *wild);
int mysqld_show_open_tables(THD *thd,const char *db,const char *wild);
int mysqld_show_tables(THD *thd,const char *db,const char *wild);
int mysqld_extend_show_tables(THD *thd,const char *db,const char *wild);
int mysqld_show_fields(THD *thd,TABLE_LIST *table, const char *wild,
		       bool verbose);
int mysqld_show_keys(THD *thd, TABLE_LIST *table);
int mysqld_show_logs(THD *thd);
void mysqld_list_fields(THD *thd,TABLE_LIST *table, const char *wild);
int mysqld_dump_create_info(THD *thd, TABLE *table, int fd = -1);
int mysqld_show_create(THD *thd, TABLE_LIST *table_list);

void mysqld_list_processes(THD *thd,const char *user,bool verbose);
int mysqld_show_status(THD *thd);
int mysqld_show_variables(THD *thd,const char *wild);
int mysqld_show(THD *thd, const char *wild, show_var_st *variables);

/* sql_base.cc */
void set_item_name(Item *item,char *pos,uint length);
bool add_field_to_list(char *field_name, enum enum_field_types type,
		       char *length, char *decimal,
		       uint type_modifier, Item *default_value,char *change,
		       TYPELIB *interval);
void store_position_for_column(const char *name);
bool add_to_list(SQL_LIST &list,Item *group,bool asc=0);
TABLE_LIST *add_table_to_list(Table_ident *table,LEX_STRING *alias,
			      bool updating,
			      thr_lock_type flags=TL_UNLOCK,
			      List<String> *use_index=0,
			      List<String> *ignore_index=0);
void add_join_on(TABLE_LIST *b,Item *expr);
void add_join_natural(TABLE_LIST *a,TABLE_LIST *b);
bool add_proc_to_list(Item *item);
TABLE *unlink_open_table(THD *thd,TABLE *list,TABLE *find);

SQL_SELECT *make_select(TABLE *head, table_map const_tables,
			table_map read_tables, COND *conds, int *error);
Item ** find_item_in_list(Item *item,List<Item> &items);
bool setup_tables(TABLE_LIST *tables);
int setup_fields(THD *thd,TABLE_LIST *tables,List<Item> &item,
		 bool set_query_id,List<Item> *sum_func_list);
int setup_conds(THD *thd,TABLE_LIST *tables,COND **conds);
int setup_ftfuncs(THD *thd);
int init_ftfuncs(THD *thd, bool no_order);
void wait_for_refresh(THD *thd);
int open_tables(THD *thd,TABLE_LIST *tables);
int open_and_lock_tables(THD *thd,TABLE_LIST *tables);
int lock_tables(THD *thd,TABLE_LIST *tables);
TABLE *open_temporary_table(THD *thd, const char *path, const char *db,
			    const char *table_name, bool link_in_list);
bool rm_temporary_table(enum db_type base, char *path);
bool send_fields(THD *thd,List<Item> &item,uint send_field_count);
void free_io_cache(TABLE *entry);
void intern_close_table(TABLE *entry);
bool close_thread_table(THD *thd, TABLE **table_ptr);
void close_thread_tables(THD *thd,bool locked=0);
void close_temporary_tables(THD *thd);
TABLE **find_temporary_table(THD *thd, const char *db, const char *table_name);
bool close_temporary_table(THD *thd, const char *db, const char *table_name);
void close_temporary(TABLE *table, bool delete_table=1);
bool rename_temporary_table(THD* thd, TABLE *table, const char *new_db,
			    const char *table_name);
void remove_db_from_cache(const my_string db);
void flush_tables();
bool remove_table_from_cache(THD *thd, const char *db, const char *table,
			     bool return_if_owned_by_thd=0);
bool close_cached_tables(THD *thd, bool wait_for_refresh, TABLE_LIST *tables);
void copy_field_from_tmp_record(Field *field,int offset);
int fill_record(List<Item> &fields,List<Item> &values);
int fill_record(Field **field,List<Item> &values);
int list_open_tables(THD *thd,List<char> *files, const char *db,const char *wild);
char* query_table_status(THD *thd,const char *db,const char *table_name);

/* sql_calc.cc */
bool eval_const_cond(COND *cond);

/* sql_load.cc */
int mysql_load(THD *thd,sql_exchange *ex, TABLE_LIST *table_list,
	       List<Item> &fields, enum enum_duplicates handle_duplicates,
	       bool local_file,thr_lock_type lock_type);
int write_record(TABLE *table,COPY_INFO *info);

/* sql_manager.cc */
/* bits set in manager_status */
#define MANAGER_BERKELEY_LOG_CLEANUP    (1L << 0)
extern ulong volatile manager_status;
extern bool volatile manager_thread_in_use;
extern pthread_t manager_thread;
extern pthread_mutex_t LOCK_manager;
extern pthread_cond_t COND_manager;
pthread_handler_decl(handle_manager, arg);

/* sql_test.cc */
#ifndef DBUG_OFF
void print_where(COND *cond,const char *info);
void print_cached_tables(void);
void TEST_filesort(TABLE **form,SORT_FIELD *sortorder,uint s_length,
		   ha_rows special);
#endif
void mysql_print_status(THD *thd);
/* key.cc */
int find_ref_key(TABLE *form,Field *field, uint *offset);
void key_copy(byte *key,TABLE *form,uint index,uint key_length);
void key_restore(TABLE *form,byte *key,uint index,uint key_length);
int key_cmp(TABLE *form,const byte *key,uint index,uint key_length);
void key_unpack(String *to,TABLE *form,uint index);
bool check_if_key_used(TABLE *table, uint idx, List<Item> &fields);
void init_errmessage(void);

void sql_perror(const char *message);
void sql_print_error(const char *format,...)
	        __attribute__ ((format (printf, 1, 2)));

extern uint32 server_id;
extern char mysql_data_home[2],server_version[SERVER_VERSION_LENGTH],
	    max_sort_char, mysql_real_data_home[];
extern my_string mysql_unix_port,mysql_tmpdir;
extern const char *first_keyword, *localhost, *delayed_user;
extern ulong refresh_version,flush_version, thread_id,query_id,opened_tables,
	     created_tmp_tables, created_tmp_disk_tables,
	     aborted_threads,aborted_connects,
	     delayed_insert_timeout,
	     delayed_insert_limit, delayed_queue_size,
	     delayed_insert_threads, delayed_insert_writes,
	     delayed_rows_in_use,delayed_insert_errors;
extern ulong filesort_rows, filesort_range_count, filesort_scan_count;
extern ulong filesort_merge_passes;
extern ulong select_range_check_count, select_range_count, select_scan_count;
extern ulong select_full_range_join_count,select_full_join_count,
			 slave_open_temp_tables;
extern uint test_flags,select_errors,mysql_port,ha_open_options;
extern ulong thd_startup_options, slow_launch_threads, slow_launch_time;
extern time_t start_time;
extern const char *command_name[];
extern I_List<THD> threads;
extern MYSQL_LOG mysql_log,mysql_update_log,mysql_slow_log,mysql_bin_log;
extern FILE *bootstrap_file;
extern pthread_key(MEM_ROOT*,THR_MALLOC);
extern pthread_key(NET*, THR_NET);
extern pthread_mutex_t LOCK_mysql_create_db,LOCK_Acl,LOCK_open,
       LOCK_thread_count,LOCK_mapped_file,LOCK_user_locks, LOCK_status,
       LOCK_grant, LOCK_error_log, LOCK_delayed_insert,
       LOCK_delayed_status, LOCK_delayed_create, LOCK_crypt, LOCK_timezone,
       LOCK_binlog_update, LOCK_slave, LOCK_server_id;
extern pthread_cond_t COND_refresh,COND_thread_count, COND_binlog_update,
                      COND_slave_stopped, COND_slave_start;
extern pthread_attr_t connection_attrib;
extern bool opt_endinfo, using_udf_functions, locked_in_memory,
            opt_using_transactions, use_temp_pool, opt_local_infile;
extern char f_fyllchar;
extern ulong ha_read_count, ha_write_count, ha_delete_count, ha_update_count,
	     ha_read_key_count, ha_read_next_count, ha_read_prev_count,
	     ha_read_first_count, ha_read_last_count,
  	     ha_read_rnd_count, ha_read_rnd_next_count;
extern MY_BITMAP temp_pool;
extern uchar *days_in_month;
extern DATE_FORMAT dayord;
extern double log_10[32];
extern uint protocol_version,dropping_tables;
extern ulong keybuff_size,sortbuff_size,max_item_sort_length,table_cache_size,
	     max_join_size,join_buff_size,tmp_table_size,
	     max_connections,max_connect_errors,long_query_time,
	     max_insert_delayed_threads, max_user_connections,
	     long_query_count,net_wait_timeout,net_interactive_timeout,
	     net_read_timeout,net_write_timeout,
	     what_to_log,flush_time, opt_sql_mode,
	     max_tmp_tables,max_heap_table_size,query_buff_size,
	     lower_case_table_names,thread_stack,thread_stack_min,
	     binlog_cache_size, max_binlog_cache_size, record_rnd_cache_size;
extern ulong com_stat[(uint) SQLCOM_END], com_other;
extern ulong specialflag, current_pid;
extern bool low_priority_updates, using_update_log,opt_warnings;
extern bool opt_sql_bin_update, opt_safe_show_db, opt_safe_user_create;
extern char language[LIBLEN],reg_ext[FN_EXTLEN],blob_newline;
extern const char **errmesg;			/* Error messages */
extern const char *default_tx_isolation_name;
extern String empty_string;
extern struct show_var_st init_vars[];
extern struct show_var_st status_vars[];
extern enum db_type default_table_type;
extern enum enum_tx_isolation default_tx_isolation;

#ifndef __WIN__
extern pthread_t signal_thread;
#endif

extern bool volatile abort_loop, shutdown_in_progress, grant_option;
extern uint volatile thread_count, thread_running, global_read_lock;

MYSQL_LOCK *mysql_lock_tables(THD *thd,TABLE **table,uint count);
void mysql_unlock_tables(THD *thd, MYSQL_LOCK *sql_lock);
void mysql_unlock_read_tables(THD *thd, MYSQL_LOCK *sql_lock);
void mysql_unlock_some_tables(THD *thd, TABLE **table,uint count);
void mysql_lock_remove(THD *thd, MYSQL_LOCK *locked,TABLE *table);
void mysql_lock_abort(THD *thd, TABLE *table);
MYSQL_LOCK *mysql_lock_merge(MYSQL_LOCK *a,MYSQL_LOCK *b);

/* Lock based on name */
int lock_table_name(THD *thd, TABLE_LIST *table_list);
void unlock_table_name(THD *thd, TABLE_LIST *table_list);
bool wait_for_locked_table_names(THD *thd, TABLE_LIST *table_list);


/* old unireg functions */

void unireg_init(ulong options);
void unireg_end(int signal);
int rea_create_table(my_string file_name,HA_CREATE_INFO *create_info,
		     List<create_field> &create_field,
		     uint key_count,KEY *key_info);
int format_number(uint inputflag,uint max_length,my_string pos,uint length,
		  my_string *errpos);
int openfrm(const char *name,const char *alias,uint filestat,uint prgflag,
	    uint ha_open_flags, TABLE *outparam);
int closefrm(TABLE *table);
db_type get_table_type(const char *name);
int read_string(File file, gptr *to, uint length);
void free_blobs(TABLE *table);
int set_zone(int nr,int min_zone,int max_zone);
ulong convert_period_to_month(ulong period);
ulong convert_month_to_period(ulong month);
long calc_daynr(uint year,uint month,uint day);
uint calc_days_in_year(uint year);
void get_date_from_daynr(long daynr,uint *year, uint *month,
			 uint *day);
void init_time(void);
long my_gmt_sec(TIME *);
time_t str_to_timestamp(const char *str,uint length);
bool str_to_time(const char *str,uint length,TIME *l_time);
longlong str_to_datetime(const char *str,uint length,bool fuzzy_date);
timestamp_type str_to_TIME(const char *str, uint length, TIME *l_time,
			   bool fuzzy_date);

int test_if_number(char *str,int *res,bool allow_wildcards);
void change_byte(byte *,uint,char,char);
void unireg_abort(int exit_code);
void init_read_record(READ_RECORD *info, THD *thd, TABLE *reg_form,
		      SQL_SELECT *select,
		      int use_record_cache, bool print_errors);
void end_read_record(READ_RECORD *info);
ha_rows filesort(TABLE **form,struct st_sort_field *sortorder, uint s_length,
		 SQL_SELECT *select, ha_rows special,ha_rows max_rows,
		 ha_rows *examined_rows);
void change_double_for_sort(double nr,byte *to);
int get_quick_record(SQL_SELECT *select);
int calc_weekday(long daynr,bool sunday_first_day_of_week);
uint calc_week(TIME *ltime, bool with_year, bool sunday_first_day_of_week,
	       uint *year);
void find_date(char *pos,uint *vek,uint flag);
TYPELIB *convert_strings_to_array_type(my_string *typelibs, my_string *end);
TYPELIB *typelib(List<String> &strings);
void clean_up(bool print_message=1);
ulong get_form_pos(File file, uchar *head, TYPELIB *save_names);
ulong make_new_entry(File file,uchar *fileinfo,TYPELIB *formnames,
		     const char *newname);
ulong next_io_size(ulong pos);
void append_unescaped(String *res,const char *pos);
int create_frm(char *name,uint reclength,uchar *fileinfo,
	       HA_CREATE_INFO *create_info, uint keys);
void update_create_info_from_table(HA_CREATE_INFO *info, TABLE *form);
int rename_file_ext(const char * from,const char * to,const char * ext);
bool check_db_name(char *db);
bool check_column_name(const char *name);
bool check_table_name(const char *name, uint length);
char *get_field(MEM_ROOT *mem,TABLE *table,uint fieldnr);
int wild_case_compare(const char *str,const char *wildstr);
int wild_compare(const char *str,const char *str_end,
		 const char *wildstr,const char *wildend,char escape);
int wild_case_compare(const char *str,const char *str_end,
		 const char *wildstr,const char *wildend,char escape);

/* from hostname.cc */
struct in_addr;
my_string ip_to_hostname(struct in_addr *in,uint *errors);
void inc_host_errors(struct in_addr *in);
void reset_host_errors(struct in_addr *in);
bool hostname_cache_init();
void hostname_cache_free();
void hostname_cache_refresh(void);
bool get_interval_info(const char *str,uint length,uint count,
		       long *values);
/* sql_cache */

extern bool sql_cache_init();
extern void sql_cache_free();
extern int sql_cache_hit(THD *thd, char *inBuf, uint length);

/* Some inline functions for more speed */

inline bool add_item_to_list(Item *item)
{
  return current_lex->item_list.push_back(item);
}
inline bool add_value_to_list(Item *value)
{
  return current_lex->value_list.push_back(value);
}
inline bool add_order_to_list(Item *item,bool asc)
{
  return add_to_list(current_lex->order_list,item,asc);
}
inline bool add_group_to_list(Item *item,bool asc)
{
  return add_to_list(current_lex->group_list,item,asc);
}
inline void mark_as_null_row(TABLE *table)
{
  table->null_row=1;
  table->status|=STATUS_NULL_ROW;
  bfill(table->null_flags,table->null_bytes,255);
}

#endif