path: root/sql/mysql_priv.h

/* Copyright (C) 2000-2003 MySQL 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 */

#include <my_global.h>
#include <mysql_version.h>
#include <mysql_embed.h>
#include <my_sys.h>
#include <m_string.h>
#include <hash.h>
#include <signal.h>
#include <thr_lock.h>
#include <my_base.h>			/* Needed by field.h */
#include <my_bitmap.h>
#include <assert.h>

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

typedef ulonglong 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 <violite.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);
char *sql_strmake_with_convert(const char *str, uint32 arg_length,
			       CHARSET_INFO *from_cs,
			       uint32 max_res_length,
			       CHARSET_INFO *to_cs, uint32 *result_length);
void kill_one_thread(THD *thd, ulong id);
bool net_request_file(NET* net, const char* fname);
char* query_table_status(THD *thd,const char *db,const char *table_name);

#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

extern CHARSET_INFO *system_charset_info, *files_charset_info ;
extern CHARSET_INFO *national_charset_info, *table_alias_charset;

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

#define ACL_CACHE_SIZE		256
/* Password lengh for 4.1 version previous versions had 16 bytes password hash */
#define HASH_PASSWORD_LENGTH	45
#define HASH_OLD_PASSWORD_LENGTH 16
#define HOST_CACHE_SIZE		128
#define MAX_ACCEPT_RETRY	10	// Test accept this many times
#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	64	// 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
#define MIN_ROWS_TO_USE_BULK_INSERT	 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 OPTION_FOUND_ROWS	32
#define OPTION_TO_QUERY_CACHE   64
#define SELECT_NO_JOIN_CACHE	256		/* 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 TMP_TABLE_ALL_COLUMNS	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_AUTOCOMMIT	OPTION_BIN_LOG*2
#define OPTION_BEGIN		OPTION_NOT_AUTOCOMMIT*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
#define SELECT_NO_UNLOCK	((ulong) OPTION_RELAXED_UNIQUE_CHECKS*2)
/* NOTE: we have now used up all 32 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_NOT_USED			16
#define MODE_ONLY_FULL_GROUP_BY		32
#define MODE_NO_UNSIGNED_SUBTRACTION	64
#define MODE_POSTGRESQL			128
#define MODE_ORACLE			256
#define MODE_MSSQL			512
#define MODE_DB2			1024
#define MODE_SAPDB			2048
#define MODE_NO_KEY_OPTIONS             4096
#define MODE_NO_TABLE_OPTIONS           8192
#define MODE_NO_FIELD_OPTIONS          16384
#define MODE_MYSQL323                  32768
#define MODE_MYSQL40                   65536
#define MODE_ANSI	               (MODE_MYSQL40*2)

#define RAID_BLOCK_SIZE 1024

#ifdef EXTRA_DEBUG
/*
  Sync points allow us to force the server to reach a certain line of code
  and block there until the client tells the server it is ok to go on.
  The client tells the server to block with SELECT GET_LOCK()
  and unblocks it with SELECT RELEASE_LOCK(). Used for debugging difficult
  concurrency problems
*/
#define DBUG_SYNC_POINT(lock_name,lock_timeout) \
 debug_sync_point(lock_name,lock_timeout)
void debug_sync_point(const char* lock_name, uint lock_timeout);
#else
#define DBUG_SYNC_POINT(lock_name,lock_timeout)
#endif /* EXTRA_DEBUG */

/* 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"

/* Options to add_table_to_list() */
#define TL_OPTION_UPDATING	1
#define TL_OPTION_FORCE_INDEX	2
#define TL_OPTION_IGNORE_LEAVES 4

/* 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;

  inline void empty()
  {
    elements=0;
    first=0;
    next= &first;
  }
  inline void link_in_list(byte *element,byte **next_ptr)
  {
    elements++;
    (*next)=element;
    next= next_ptr;
    *next=0;
  }
} 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 "protocol.h"
#include "sql_udf.h"
#include "item.h"
typedef compare_func_creator (*chooser_compare_func_creator)(bool invert);
#include "sql_class.h"
#include "opt_range.h"

#ifdef HAVE_QUERY_CACHE
#include "sql_cache.h"
#define query_cache_store_query(A, B) query_cache.store_query(A, B)
#define query_cache_destroy() query_cache.destroy()
#define query_cache_result_size_limit(A) query_cache.result_size_limit(A)
#define query_cache_resize(A) query_cache.resize(A)
#define query_cache_set_min_res_unit(A) query_cache.set_min_res_unit(A)
#define query_cache_invalidate3(A, B, C) query_cache.invalidate(A, B, C)
#define query_cache_invalidate1(A) query_cache.invalidate(A)
#define query_cache_send_result_to_client(A, B, C) \
  query_cache.send_result_to_client(A, B, C)
#define query_cache_invalidate_by_MyISAM_filename_ref \
  &query_cache_invalidate_by_MyISAM_filename
#else
#define query_cache_store_query(A, B)
#define query_cache_destroy()
#define query_cache_result_size_limit(A)
#define query_cache_resize(A)
#define query_cache_set_min_res_unit(A)
#define query_cache_invalidate3(A, B, C)
#define query_cache_invalidate1(A)
#define query_cache_send_result_to_client(A, B, C) 0
#define query_cache_invalidate_by_MyISAM_filename_ref NULL

#define query_cache_abort(A)
#define query_cache_end_of_result(A)
#define query_cache_invalidate_by_MyISAM_filename_ref NULL
#endif /*HAVE_QUERY_CACHE*/

#define prepare_execute(A) ((A)->command == COM_EXECUTE)

int mysql_create_db(THD *thd, char *db, HA_CREATE_INFO *create, bool silent);
int mysql_alter_db(THD *thd, const char *db, HA_CREATE_INFO *create);
int mysql_rm_db(THD *thd,char *db,bool if_exists, bool silent);
void mysql_binlog_send(THD* thd, char* log_ident, my_off_t pos, ushort flags);
int mysql_rm_table(THD *thd,TABLE_LIST *tables, my_bool if_exists,
		   my_bool drop_temporary);
int mysql_rm_table_part2(THD *thd, TABLE_LIST *tables, bool if_exists,
			 bool drop_temporary, bool log_query);
int mysql_rm_table_part2_with_lock(THD *thd, TABLE_LIST *tables,
				   bool if_exists, bool drop_temporary,
				   bool log_query);
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);
bool is_update_query(enum enum_sql_command command);
void free_items(Item *item);
bool alloc_query(THD *thd, char *packet, ulong packet_length);
void mysql_init_select(LEX *lex);
void mysql_init_query(THD *thd);
bool mysql_new_select(LEX *lex, bool move_down);
void create_select_for_variable(const char *var_name);
void mysql_init_multi_delete(LEX *lex);
void init_max_user_conn(void);
void init_update_queries(void);
void free_max_user_conn(void);
extern "C" pthread_handler_decl(handle_one_connection,arg);
extern "C" pthread_handler_decl(handle_bootstrap,arg);
void end_thread(THD *thd,bool put_in_cache);
void flush_thread_cache();
void mysql_execute_command(THD *thd);
bool do_command(THD *thd);
bool dispatch_command(enum enum_server_command command, THD *thd,
		      char* packet, uint packet_length);
#ifndef EMBEDDED_LIBRARY
bool check_stack_overrun(THD *thd,char *dummy);
#else
#define check_stack_overrun(A, B) 0
#endif

bool reload_acl_and_cache(THD *thd, ulong options, TABLE_LIST *tables, 
                          bool *write_to_binlog);
void table_cache_init(void);
void table_cache_free(void);
uint cached_tables(void);
void kill_mysql(void);
void close_connection(THD *thd, uint errcode, bool lock);
bool check_access(THD *thd, ulong access, const char *db=0, ulong *save_priv=0,
		  bool no_grant=0, bool no_errors=0);
bool check_table_access(THD *thd, ulong want_access, TABLE_LIST *tables,
			bool no_errors=0);
bool check_global_access(THD *thd, ulong want_access);

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);
int mysql_preload_keys(THD* thd, TABLE_LIST* table_list);

bool check_simple_select();

SORT_FIELD * make_unireg_sortorder(ORDER *order, uint *length);
int setup_ref_array(THD *thd, Item ***rref_pointer_array, uint elements);
int setup_order(THD *thd, Item **ref_pointer_array, TABLE_LIST *tables,
		List<Item> &fields, List <Item> &all_fields, ORDER *order);
int setup_group(THD *thd, Item **ref_pointer_array, TABLE_LIST *tables,
		List<Item> &fields, List<Item> &all_fields, ORDER *order,
		bool *hidden_group_fields);

int handle_select(THD *thd, LEX *lex, select_result *result);
int mysql_select(THD *thd, Item ***rref_pointer_array,
		 TABLE_LIST *tables, uint wild_num,  List<Item> &list,
		 COND *conds, uint og_num, ORDER *order, ORDER *group,
		 Item *having, ORDER *proc_param, ulong select_type, 
		 select_result *result, SELECT_LEX_UNIT *unit, 
		 SELECT_LEX *select_lex,  bool tables_and_fields_initied);
void free_underlaid_joins(THD *thd, SELECT_LEX *select);
void fix_tables_pointers(SELECT_LEX *select_lex);
void fix_tables_pointers(SELECT_LEX_UNIT *select_lex);
int mysql_explain_union(THD *thd, SELECT_LEX_UNIT *unit,
			select_result *result);
int mysql_explain_select(THD *thd, SELECT_LEX *sl, char const *type,
			 select_result *result);
int mysql_union(THD *thd, LEX *lex, select_result *result,
		SELECT_LEX_UNIT *unit, bool tables_and_fields_initied);
int mysql_derived(THD *thd, LEX *lex, SELECT_LEX_UNIT *s, TABLE_LIST *t);
Field *create_tmp_field(THD *thd, TABLE *table,Item *item, Item::Type type,
			Item ***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, uint select_field_count);
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,
                      uint order_num, ORDER *order,
		      bool drop_primary,
		      enum enum_duplicates handle_duplicates,
		      enum enum_enable_or_disable keys_onoff=LEAVE_AS_IS,
		      bool simple_alter=0);
int mysql_create_like_table(THD *thd, TABLE_LIST *table,
                            HA_CREATE_INFO *create_info,
                            Table_ident *src_table);
bool mysql_rename_table(enum db_type base,
			const char *old_db,
			const char * old_name,
			const char *new_db,
			const char * new_name);
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,
                 uint order_num, ORDER *order, ha_rows limit,
		 enum enum_duplicates handle_duplicates);
int mysql_multi_update(THD *thd, TABLE_LIST *table_list,
		       List<Item> *fields, List<Item> *values,
		       COND *conds, ulong options,
		       enum enum_duplicates handle_duplicates,
		       SELECT_LEX_UNIT *unit, SELECT_LEX *select_lex);
int mysql_insert(THD *thd,TABLE_LIST *table,List<Item> &fields,
		 List<List_item> &values, List<Item> &update_fields,
		 List<Item> &update_values, enum_duplicates flag);
void kill_delayed_threads(void);
int mysql_delete(THD *thd, TABLE_LIST *table, COND *conds, ORDER *order,
                 ha_rows rows, ulong options);
int mysql_truncate(THD *thd, TABLE_LIST *table_list, bool dont_send_ok=0);
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);
extern const Field *not_found_field;
Field *find_field_in_tables(THD *thd, Item_ident *item, TABLE_LIST *tables,
			    TABLE_LIST **where, bool report_error);
Field *find_field_in_table(THD *thd,TABLE *table,const char *name,uint length,
			   bool check_grant,bool allow_rowid);
#ifdef HAVE_OPENSSL
#include <openssl/des.h>
struct st_des_keyblock
{
  des_cblock key1, key2, key3;
};
struct st_des_keyschedule
{
  des_key_schedule ks1, ks2, ks3;
};
extern char *des_key_file;
extern struct st_des_keyschedule des_keyschedule[10];
extern uint des_default_key;
extern pthread_mutex_t LOCK_des_key_file;
bool load_des_key_file(const char *file_name);
void free_des_key_file();
#endif /* HAVE_OPENSSL */

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

/* sql_show.cc */
int mysqld_show_dbs(THD *thd,const char *wild);
int mysqld_show_open_tables(THD *thd,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);
int mysqld_show_create_db(THD *thd, char *dbname, HA_CREATE_INFO *create);

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,
		enum enum_var_type value_type);
int mysqld_show_charsets(THD *thd,const char *wild);
int mysqld_show_collations(THD *thd,const char *wild);
int mysqld_show_table_types(THD *thd);
int mysqld_show_privileges(THD *thd);
int mysqld_show_column_types(THD *thd);
int mysqld_help (THD *thd, const char *text);

/* sql_prepare.cc */
int compare_prep_stmt(void *not_used, PREP_STMT *stmt, ulong *key);
void free_prep_stmt(PREP_STMT *stmt, TREE_FREE mode, void *not_used);
bool mysql_stmt_prepare(THD *thd, char *packet, uint packet_length);
void mysql_stmt_execute(THD *thd, char *packet);
void mysql_stmt_free(THD *thd, char *packet);
void mysql_stmt_get_longdata(THD *thd, char *pos, ulong packet_length);
int check_insert_fields(THD *thd,TABLE *table,List<Item> &fields,
			List<Item> &values, ulong counter);

/* sql_error.cc */
MYSQL_ERROR *push_warning(THD *thd, MYSQL_ERROR::enum_warning_level level, uint code,
                          const char *msg);
void push_warning_printf(THD *thd, MYSQL_ERROR::enum_warning_level level,
			 uint code, const char *format, ...);
void mysql_reset_errors(THD *thd);
my_bool mysqld_show_warnings(THD *thd, ulong levels_to_show);

/* sql_handler.cc */
int mysql_ha_open(THD *thd, TABLE_LIST *tables);
int mysql_ha_close(THD *thd, TABLE_LIST *tables, bool dont_send_ok=0);
int mysql_ha_closeall(THD *thd, TABLE_LIST *tables);
int mysql_ha_read(THD *, TABLE_LIST *,enum enum_ha_read_modes,char *,
               List<Item> *,enum ha_rkey_function,Item *,ha_rows,ha_rows);

/* sql_base.cc */
void set_item_name(Item *item,char *pos,uint length);
bool add_field_to_list(THD *thd, char *field_name, enum enum_field_types type,
		       char *length, char *decimal,
		       uint type_modifier,
		       Item *default_value, Item *comment,
		       char *change, TYPELIB *interval,CHARSET_INFO *cs,
		       uint uint_geom_type);
void store_position_for_column(const char *name);
bool add_to_list(THD *thd, SQL_LIST &list,Item *group,bool asc=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(THD *thd, 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);
enum find_item_error_report_type {REPORT_ALL_ERRORS, REPORT_EXCEPT_NOT_FOUND,
				  IGNORE_ERRORS};
extern const Item **not_found_item;
Item ** find_item_in_list(Item *item, List<Item> &items, uint *counter,
			  find_item_error_report_type report_error);
key_map get_key_map_from_key_list(TABLE *table, 
				  List<String> *index_list);
bool insert_fields(THD *thd,TABLE_LIST *tables,
		   const char *db_name, const char *table_name,
		   List_iterator<Item> *it);
bool setup_tables(TABLE_LIST *tables);
int setup_wild(THD *thd, TABLE_LIST *tables, List<Item> &fields,
	       List<Item> *sum_func_list, uint wild_num);
int setup_fields(THD *thd, Item** ref_pointer_array, TABLE_LIST *tables,
		 List<Item> &item, bool set_query_id, 
		 List<Item> *sum_func_list, bool allow_sum_func);
int setup_conds(THD *thd,TABLE_LIST *tables,COND **conds);
int setup_ftfuncs(SELECT_LEX* select);
int init_ftfuncs(THD *thd, SELECT_LEX* select, 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);
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, bool skip_derived=0);
void close_temporary_tables(THD *thd);
TABLE_LIST * find_table_in_list(TABLE_LIST *table,
				const char *db_name, const char *table_name);
TABLE_LIST * find_real_table_in_list(TABLE_LIST *table,
				     const char *db_name,
				     const char *table_name);
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, bool ignore_errors);
int fill_record(Field **field,List<Item> &values, bool ignore_errors);
OPEN_TABLE_LIST *list_open_tables(THD *thd, const char *wild);

/* 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, mqh_used;
extern pthread_t manager_thread;
extern "C" 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(SORT_FIELD *sortorder,uint s_length);
#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)));
bool fn_format_relative_to_data_home(my_string to, const char *name,
				     const char *dir, const char *extension);
bool open_log(MYSQL_LOG *log, const char *hostname,
	      const char *opt_name, const char *extension,
	      const char *index_file_name,
	      enum_log_type type, bool read_append = 0,
	      bool no_auto_events = 0);

/*
  External variables
*/

extern time_t start_time;
extern char *mysql_data_home,server_version[SERVER_VERSION_LENGTH],
	    mysql_real_data_home[], *opt_mysql_tmpdir;
#define mysql_tmpdir (my_tmpdir(&mysql_tmpdir_list))
extern MY_TMPDIR mysql_tmpdir_list;
extern const char *command_name[];
extern const char *first_keyword, *localhost, *delayed_user, *binary_keyword;
extern const char **errmesg;			/* Error messages */
extern const char *myisam_recover_options_str;
extern uchar *days_in_month;
extern char language[LIBLEN],reg_ext[FN_EXTLEN];
extern char glob_hostname[FN_REFLEN], mysql_home[FN_REFLEN];
extern char pidfile_name[FN_REFLEN], time_zone[30], *opt_init_file;
extern char log_error_file[FN_REFLEN];
extern double log_10[32];
extern ulonglong keybuff_size;
extern ulong refresh_version,flush_version, thread_id,query_id,opened_tables;
extern ulong created_tmp_tables, created_tmp_disk_tables;
extern ulong aborted_threads,aborted_connects;
extern ulong delayed_insert_timeout;
extern ulong delayed_insert_limit, delayed_queue_size;
extern ulong delayed_insert_threads, delayed_insert_writes;
extern ulong 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;
extern ulong slave_open_temp_tables;
extern ulong query_cache_size, query_cache_min_res_unit;
extern ulong thd_startup_options, slow_launch_threads, slow_launch_time;
extern ulong server_id, concurrency;
extern ulong ha_read_count, ha_write_count, ha_delete_count, ha_update_count;
extern ulong ha_read_key_count, ha_read_next_count, ha_read_prev_count;
extern ulong ha_read_first_count, ha_read_last_count;
extern ulong ha_read_rnd_count, ha_read_rnd_next_count;
extern ulong ha_commit_count, ha_rollback_count,table_cache_size;
extern ulong max_connections,max_connect_errors, connect_timeout;
extern ulong max_insert_delayed_threads, max_user_connections;
extern ulong long_query_count, what_to_log,flush_time;
extern ulong query_buff_size, thread_stack,thread_stack_min;
extern ulong binlog_cache_size, max_binlog_cache_size, open_files_limit;
extern ulong max_binlog_size, rpl_recovery_rank, thread_cache_size;
extern ulong com_stat[(uint) SQLCOM_END], com_other, back_log;
extern ulong specialflag, current_pid;
extern ulong expire_logs_days;
extern my_bool relay_log_purge;
extern uint test_flags,select_errors,ha_open_options;
extern uint protocol_version, mysqld_port, dropping_tables;
extern uint delay_key_write_options;
extern bool opt_endinfo, using_udf_functions, locked_in_memory;
extern bool opt_using_transactions, mysql_embedded;
extern bool using_update_log, opt_large_files;
extern bool opt_log, opt_update_log, opt_bin_log, opt_slow_log, opt_error_log;
extern bool opt_disable_networking, opt_skip_show_db;
extern bool volatile abort_loop, shutdown_in_progress, grant_option;
extern uint volatile thread_count, thread_running, global_read_lock;
extern my_bool opt_sql_bin_update, opt_safe_user_create, opt_no_mix_types;
extern my_bool opt_safe_show_db, opt_local_infile, lower_case_table_names;
extern my_bool opt_slave_compressed_protocol, use_temp_pool;
extern my_bool opt_readonly;
extern my_bool opt_enable_named_pipe;
extern my_bool opt_old_passwords, use_old_passwords;
extern char *shared_memory_base_name, *mysqld_unix_port;
extern bool opt_enable_shared_memory;

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_mutex_t LOCK_mysql_create_db,LOCK_Acl,LOCK_open,
       LOCK_thread_count,LOCK_mapped_file,LOCK_user_locks, LOCK_status,
       LOCK_error_log, LOCK_delayed_insert,
       LOCK_delayed_status, LOCK_delayed_create, LOCK_crypt, LOCK_timezone,
       LOCK_slave_list, LOCK_active_mi, LOCK_manager,
       LOCK_global_system_variables;
extern rw_lock_t	LOCK_grant;
extern pthread_cond_t COND_refresh, COND_thread_count, COND_manager;
extern pthread_attr_t connection_attrib;
extern I_List<THD> threads;
extern MY_BITMAP temp_pool;
extern DATE_FORMAT dayord;
extern String empty_string;
extern SHOW_VAR init_vars[],status_vars[], internal_vars[];
extern struct show_table_type_st table_type_vars[];
extern SHOW_COMP_OPTION have_isam;
extern SHOW_COMP_OPTION have_innodb;
extern SHOW_COMP_OPTION have_berkeley_db;
extern struct system_variables global_system_variables;
extern struct system_variables max_system_variables;
extern struct rand_struct sql_rand;

/* optional things, have_* variables */

extern SHOW_COMP_OPTION have_isam, have_innodb, have_berkeley_db;
extern SHOW_COMP_OPTION have_raid, have_openssl, have_symlink;
extern SHOW_COMP_OPTION have_query_cache, have_berkeley_db, have_innodb;
extern SHOW_COMP_OPTION have_crypt;
extern SHOW_COMP_OPTION have_compress;

#ifndef __WIN__
extern pthread_t signal_thread;
#endif

#ifdef HAVE_OPENSSL
extern struct st_VioSSLAcceptorFd * ssl_acceptor_fd;
#endif /* HAVE_OPENSSL */

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);
void mysql_lock_abort_for_thread(THD *thd, TABLE *table);
MYSQL_LOCK *mysql_lock_merge(MYSQL_LOCK *a,MYSQL_LOCK *b);
bool lock_global_read_lock(THD *thd);
void unlock_global_read_lock(THD *thd);
bool wait_if_global_read_lock(THD *thd, bool abort_on_refresh);
void start_waiting_global_read_lock(THD *thd);

/* Lock based on name */
int lock_and_wait_for_table_name(THD *thd, TABLE_LIST *table_list);
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);
bool lock_table_names(THD *thd, TABLE_LIST *table_list);
void unlock_table_names(THD *thd, TABLE_LIST *table_list,
			TABLE_LIST *last_table= 0);


/* old unireg functions */

void unireg_init(ulong options);
void unireg_end(void);
int rea_create_table(THD *thd, 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 *, long *current_timezone);
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);
void localtime_to_TIME(TIME *to, struct tm *from);

int test_if_number(char *str,int *res,bool allow_wildcards);
void change_byte(byte *,uint,char,char);
extern "C" 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(THD *thd, TABLE *form,struct st_sort_field *sortorder,
		 uint s_length, SQL_SELECT *select,
		 ha_rows max_rows, ha_rows *examined_rows);
void filesort_free_buffers(TABLE *table);
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);
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, uint length);
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, Field *field);
bool get_field(MEM_ROOT *mem, Field *field, class String *res);
int wild_case_compare(CHARSET_INFO *cs, const char *str,const char *wildstr);

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

/* item.cc */
Item *get_system_var(enum_var_type var_type, LEX_STRING name);
Item *get_system_var(enum_var_type var_type, const char *var_name, uint length,
		     const char *item_name);
/* log.cc */
bool flush_error_log(void);

/* Some inline functions for more speed */

inline bool add_item_to_list(THD *thd, Item *item)
{
  return thd->lex.current_select->add_item_to_list(thd, item);
}

inline bool add_value_to_list(THD *thd, Item *value)
{
  return thd->lex.value_list.push_back(value);
}

inline bool add_order_to_list(THD *thd, Item *item, bool asc)
{
  return thd->lex.current_select->add_order_to_list(thd, item, asc);
}

inline bool add_group_to_list(THD *thd, Item *item, bool asc)
{
  return thd->lex.current_select->add_group_to_list(thd, 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);
}

compare_func_creator comp_eq_creator(bool invert);
compare_func_creator comp_ge_creator(bool invert);
compare_func_creator comp_gt_creator(bool invert);
compare_func_creator comp_le_creator(bool invert);
compare_func_creator comp_lt_creator(bool invert);
compare_func_creator comp_ne_creator(bool invert);