Extension of .frm file (not yet ready for push)

include/m_ctype.h

@@ -51,52 +51,54 @@ typedef struct my_uni_idx_st {
 
 typedef struct charset_info_st
 {
-    uint      number;
-    const char *name;
-    uchar    *ctype;
-    uchar    *to_lower;
-    uchar    *to_upper;
-    uchar    *sort_order;
-    uint16      *tab_to_uni;
-    MY_UNI_IDX  *tab_from_uni;
+  uint      number;
+  const char *name;
+  uchar    *ctype;
+  uchar    *to_lower;
+  uchar    *to_upper;
+  uchar    *sort_order;
+  uint16      *tab_to_uni;
+  MY_UNI_IDX  *tab_from_uni;
     
-    /* Collation routines */
-    uint      strxfrm_multiply;
-    int     (*strnncoll)(struct charset_info_st *,
-                         const uchar *, uint, const uchar *, uint);
-    int     (*strnxfrm)(struct charset_info_st *,
-                         uchar *, uint, const uchar *, uint);
-    my_bool (*like_range)(struct charset_info_st *,
-                          const char *, uint, pchar, uint,
-                          char *, char *, uint *, uint *);
+  /* Collation routines */
+  uint      strxfrm_multiply;
+  int     (*strnncoll)(struct charset_info_st *,
+		       const uchar *, uint, const uchar *, uint);
+  int     (*strnxfrm)(struct charset_info_st *,
+		      uchar *, uint, const uchar *, uint);
+  my_bool (*like_range)(struct charset_info_st *,
+			const char *, uint, pchar, uint,
+			char *, char *, uint *, uint *);
     
-    /* Multibyte routines */
-    uint      mbmaxlen;
-    int     (*ismbchar)(struct charset_info_st *, const char *, const char *);
-    my_bool (*ismbhead)(struct charset_info_st *, uint);
-    int     (*mbcharlen)(struct charset_info_st *, uint);
+  /* Multibyte routines */
+  uint      mbmaxlen;
+  int     (*ismbchar)(struct charset_info_st *, const char *, const char *);
+  my_bool (*ismbhead)(struct charset_info_st *, uint);
+  int     (*mbcharlen)(struct charset_info_st *, uint);
     
-    /* Unicode convertion */
-    int (*mb_wc)(struct charset_info_st *cs,my_wc_t *wc,
-    		 const unsigned char *s,const unsigned char *e);
-    int (*wc_mb)(struct charset_info_st *cs,my_wc_t wc,
-    		 unsigned char *s,unsigned char *e);
+  /* Unicode convertion */
+  int (*mb_wc)(struct charset_info_st *cs,my_wc_t *wc,
+	       const unsigned char *s,const unsigned char *e);
+  int (*wc_mb)(struct charset_info_st *cs,my_wc_t wc,
+	       unsigned char *s,unsigned char *e);
     
-    /* Functions for case convertion */
-    void    (*caseup_str)(struct charset_info_st *, char *);
-    void    (*casedn_str)(struct charset_info_st *, char *);
-    void    (*caseup)(struct charset_info_st *, char *, uint);
-    void    (*casedn)(struct charset_info_st *, char *, uint);
+  /* Functions for case convertion */
+  void    (*caseup_str)(struct charset_info_st *, char *);
+  void    (*casedn_str)(struct charset_info_st *, char *);
+  void    (*caseup)(struct charset_info_st *, char *, uint);
+  void    (*casedn)(struct charset_info_st *, char *, uint);
     
-    /* Functions for case comparison */
-    int  (*strcasecmp)(struct charset_info_st *, const char *, const char *);
-    int  (*strncasecmp)(struct charset_info_st *, const char *, const char *, uint);
+  /* Functions for case comparison */
+  int  (*strcasecmp)(struct charset_info_st *, const char *, const char *);
+  int  (*strncasecmp)(struct charset_info_st *, const char *, const char *,
+		      uint);
     
-    /* Hash calculation */
-    uint (*hash_caseup)(struct charset_info_st *cs, const byte *key, uint len);
-    void (*hash_sort)(struct charset_info_st *cs, const uchar *key, uint len, ulong *nr1, ulong *nr2); 
+  /* Hash calculation */
+  uint (*hash_caseup)(struct charset_info_st *cs, const byte *key, uint len);
+  void (*hash_sort)(struct charset_info_st *cs, const uchar *key, uint len,
+		    ulong *nr1, ulong *nr2); 
     
-    char    max_sort_char; /* For LIKE otimization */
+  char    max_sort_char; /* For LIKE optimization */
 } CHARSET_INFO;
 
 /* strings/ctype.c */

include/mysqld_error.h

@@ -243,4 +243,6 @@
 #define ER_MIXING_NOT_ALLOWED 1224
 #define ER_DUP_ARGUMENT 1225
 #define ER_USER_LIMIT_REACHED 1226
-#define ER_ERROR_MESSAGES 227
+#define ER_WRONG_FK_DEF 1227
+#define ER_KEY_REF_DO_NOT_MATCH_TABLE_REF 1228
+#define ER_ERROR_MESSAGES 229

sql/field.cc

@@ -4489,9 +4489,7 @@ void Field_enum::sql_type(String &res) const
   {
     if (flag)
       res.append(',');
-    res.append('\'');
-    append_unescaped(&res,*pos);
-    res.append('\'');
+    append_unescaped(&res, *pos, strlen(*pos));
     flag=1;
   }
   res.append(')');
@@ -4610,9 +4608,7 @@ void Field_set::sql_type(String &res) const
   {
     if (flag)
       res.append(',');
-    res.append('\'');
-    append_unescaped(&res,*pos);
-    res.append('\'');
+    append_unescaped(&res, *pos, strlen(*pos));
     flag=1;
   }
   res.append(')');
@@ -4713,6 +4709,7 @@ uint pack_length_to_packflag(uint type)
 Field *make_field(char *ptr, uint32 field_length,
 		  uchar *null_pos, uchar null_bit,
 		  uint pack_flag,
+		  enum_field_types field_type,
 		  Field::utype unireg_check,
 		  TYPELIB *interval,
 		  const char *field_name,
@@ -4728,7 +4725,8 @@ Field *make_field(char *ptr, uint32 field_length,
     if (!f_is_packed(pack_flag))
       return new Field_string(ptr,field_length,null_pos,null_bit,
 			      unireg_check, field_name, table,
-			      f_is_binary(pack_flag) != 0, default_charset_info);
+			      f_is_binary(pack_flag) != 0,
+			      default_charset_info);
 
     uint pack_length=calc_pack_length((enum_field_types)
 				      f_packtype(pack_flag),
@@ -4756,7 +4754,7 @@ Field *make_field(char *ptr, uint32 field_length,
     }
   }
 
-  switch ((enum enum_field_types) f_packtype(pack_flag)) {
+  switch (field_type) {
   case FIELD_TYPE_DECIMAL:
     return new Field_decimal(ptr,field_length,null_pos,null_bit,
 			     unireg_check, field_name, table,

sql/field.h

@@ -41,6 +41,7 @@ public:
   uchar		*null_ptr;		// Byte where null_bit is
   struct st_table *table;		// Pointer for table
   const char	*table_name,*field_name;
+  LEX_STRING	comment;
   ulong		query_id;		// For quick test of used fields
   // Field is part of the following keys
   key_map 	key_start,part_of_key,part_of_sortkey;
@@ -1013,6 +1014,7 @@ public:
   const char *field_name;
   const char *change;				// If done with alter table
   const char *after;				// Put column after this one
+  LEX_STRING comment;				// Comment for field
   Item	*def;					// Default value
   enum	enum_field_types sql_type;
   uint32 length;
@@ -1020,6 +1022,7 @@ public:
   Field::utype unireg_check;
   TYPELIB *interval;				// Which interval to use
   Field *field;					// For alter table
+  CHARSET_INFO *charset;
 
   uint8 row,col,sc_length,interval_id;		// For rea_create_table
   uint	offset,pack_flag;
@@ -1067,7 +1070,8 @@ public:
 
 Field *make_field(char *ptr, uint32 field_length,
 		  uchar *null_pos, uchar null_bit,
-		  uint pack_flag, Field::utype unireg_check,
+		  uint pack_flag, enum_field_types field_type,
+		  Field::utype unireg_check,
 		  TYPELIB *interval, const char *field_name,
 		  struct st_table *table);
 uint pack_length_to_packflag(uint type);

sql/handler.h

@@ -149,22 +149,23 @@ enum enum_tx_isolation { ISO_READ_UNCOMMITTED, ISO_READ_COMMITTED,
 
 typedef struct st_ha_create_information
 {
-  ulong table_options;
-  enum db_type db_type;
-  enum row_type row_type;
-  ulong avg_row_length;
-  ulonglong max_rows,min_rows;
-  ulonglong auto_increment_value;
+  CHARSET_INFO *table_charset;
   char *comment,*password;
   char *data_file_name, *index_file_name;
   char *create_statement;
-  uint options;					/* OR of HA_CREATE_ options */
-  uint raid_type,raid_chunks;
+  ulonglong max_rows,min_rows;
+  ulonglong auto_increment_value;
+  ulong table_options;
+  ulong avg_row_length;
   ulong raid_chunksize;
-  bool if_not_exists;
   ulong used_fields;
   SQL_LIST merge_list;
+  enum db_type db_type;
+  enum row_type row_type;
+  uint options;					/* OR of HA_CREATE_ options */
+  uint raid_type,raid_chunks;
   uint merge_insert_method;
+  bool if_not_exists;
 } HA_CREATE_INFO;
 
 

sql/item_strfunc.cc

@@ -2342,7 +2342,8 @@ String *Item_func_spatial_collection::val_str(String *str)
     }
     else
     {
-      uint32 wkb_type, len=res->length();
+      enum Geometry::wkbType wkb_type;
+      uint32 len=res->length();
       const char *data=res->ptr()+1;
 
       /* 
@@ -2351,75 +2352,74 @@ String *Item_func_spatial_collection::val_str(String *str)
          do this checking now
       */
       
-      if (len<5)
+      if (len < 5)
         goto ret;
-      wkb_type=uint4korr(data);
+      wkb_type= (Geometry::wkbType) uint4korr(data);
       data+=4;
       len-=5;
-      if ( wkb_type != item_type )
+      if (wkb_type != item_type)
         goto ret;
       
-      switch(coll_type)
-      {
-         case Geometry::wkbMultiPoint:
-         case Geometry::wkbMultiLineString:
-         case Geometry::wkbMultiPolygon:
-           if (len<WKB_HEADER_SIZE) 
-             goto ret;
+      switch (coll_type) {
+      case Geometry::wkbMultiPoint:
+      case Geometry::wkbMultiLineString:
+      case Geometry::wkbMultiPolygon:
+	if (len < WKB_HEADER_SIZE) 
+	  goto ret;
            
-           data+=WKB_HEADER_SIZE;
-           len-=WKB_HEADER_SIZE;
-           if (str->reserve(len,512))
-             goto ret;
-           str->q_append(data,len);
-           break;
-
-         case Geometry::wkbLineString:
-           if (str->reserve(POINT_DATA_SIZE,512))
-             goto ret;
-           str->q_append(data,POINT_DATA_SIZE);
-           break;
-
-         case Geometry::wkbPolygon:
-           { 
-             uint32 n_points;
-             double x1, y1, x2, y2;
-
-             if (len < WKB_HEADER_SIZE + 4 + 8 + 8) 
-               goto ret;
-             data+=WKB_HEADER_SIZE;
-             len-=WKB_HEADER_SIZE;
-
-             uint32 llen=len;
-             const char *ldata=data;
+	data+=WKB_HEADER_SIZE;
+	len-=WKB_HEADER_SIZE;
+	if (str->reserve(len,512))
+	  goto ret;
+	str->q_append(data,len);
+	break;
+
+      case Geometry::wkbLineString:
+	if (str->reserve(POINT_DATA_SIZE,512))
+	  goto ret;
+	str->q_append(data,POINT_DATA_SIZE);
+	break;
+
+      case Geometry::wkbPolygon:
+      { 
+	uint32 n_points;
+	double x1, y1, x2, y2;
+
+	if (len < WKB_HEADER_SIZE + 4 + 8 + 8) 
+	  goto ret;
+	data+=WKB_HEADER_SIZE;
+	len-=WKB_HEADER_SIZE;
+
+	uint32 llen=len;
+	const char *ldata=data;
              
-             n_points=uint4korr(data);
-             data+=4;
-             float8get(x1,data);
-             data+=8;
-             float8get(y1,data);
-             data+=8;
+	n_points=uint4korr(data);
+	data+=4;
+	float8get(x1,data);
+	data+=8;
+	float8get(y1,data);
+	data+=8;
              
-             len-= 4 + 8 + 8;
+	len-= 4 + 8 + 8;
              
-             if (len < n_points * POINT_DATA_SIZE)
-               goto ret;
-             data+=(n_points-2) * POINT_DATA_SIZE;
+	if (len < n_points * POINT_DATA_SIZE)
+	  goto ret;
+	data+=(n_points-2) * POINT_DATA_SIZE;
 
-             float8get(x2,data);
-             float8get(y2,data+8);
+	float8get(x2,data);
+	float8get(y2,data+8);
              
-             if ((x1 != x2) || (y1 != y2))
-               goto ret;
+	if ((x1 != x2) || (y1 != y2))
+	  goto ret;
              
-             if (str->reserve(llen,512))
-               goto ret;
-             str->q_append(ldata, llen);
-           }
-           break;
+	if (str->reserve(llen,512))
+	  goto ret;
+	str->q_append(ldata, llen);
+      }
+      break;
          
-         default:
-           goto ret;
+      default:
+	goto ret;
       }
     }
   }

sql/lex.h

@@ -309,6 +309,7 @@ static SYMBOL symbols[] = {
   { "SESSION",		SYM(SESSION_SYM),0,0},
   { "SET",		SYM(SET),0,0},
   { "SIGNED",		SYM(SIGNED_SYM),0,0},
+  { "SIMPLE",		SYM(SIMPLE_SYM),0,0},
   { "SHARE",		SYM(SHARE_SYM),0,0},
   { "SHOW",		SYM(SHOW),0,0},
   { "SHUTDOWN",		SYM(SHUTDOWN),0,0},

sql/mysql_priv.h

@@ -474,8 +474,9 @@ int mysql_ha_read(THD *, TABLE_LIST *,enum enum_ha_read_modes,char *,
 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);
+		       uint type_modifier,
+		       Item *default_value, Item *comment,
+		       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,
@@ -726,7 +727,7 @@ 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);
+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);

sql/slave.cc

@@ -1104,14 +1104,16 @@ static inline int add_relay_log(RELAY_LOG_INFO* rli,LOG_INFO* linfo)
 
 static bool wait_for_relay_log_space(RELAY_LOG_INFO* rli)
 {
-  bool slave_killed;
+  bool slave_killed=0;
   MASTER_INFO* mi = rli->mi;
   const char* save_proc_info;
   THD* thd = mi->io_thd;
   DBUG_ENTER("wait_for_relay_log_space");
+
   pthread_mutex_lock(&rli->log_space_lock);
   save_proc_info = thd->proc_info;
   thd->proc_info = "Waiting for relay log space to free";
+
   while (rli->log_space_limit < rli->log_space_total &&
 	 !(slave_killed=io_slave_killed(thd,mi)))
   {

sql/spatial.h

@@ -3,8 +3,8 @@
 
 #include "gstream.h"
 
-const int POINT_DATA_SIZE = 8+8; 
-const int WKB_HEADER_SIZE = 1+4;
+const uint POINT_DATA_SIZE = 8+8; 
+const uint WKB_HEADER_SIZE = 1+4;
 
 struct stPoint2D
 {

sql/sql_class.h

@@ -69,11 +69,13 @@ class MYSQL_LOG {
   char log_file_name[FN_REFLEN],index_file_name[FN_REFLEN];
   bool write_error,inited;
   uint file_id; // current file sequence number for load data infile
-  // binary logging
-  bool no_rotate; // for binlog - if log name can never change
-  // we should not try to rotate it or write any rotation events
-  // the user should use FLUSH MASTER instead of FLUSH LOGS for
-  // purging
+  /*
+    For binlog - if log name can never change
+    we should not try to rotate it or write any rotation events
+    the user should use FLUSH MASTER instead of FLUSH LOGS for
+    purging
+  */
+  bool no_rotate;
   enum cache_type io_cache_type;
   bool need_start_event;
   pthread_cond_t update_cond;
@@ -215,19 +217,40 @@ public:
 
 class Key :public Sql_alloc {
 public:
-  enum Keytype { PRIMARY, UNIQUE, MULTIPLE, FULLTEXT, SPATIAL };
+  enum Keytype { PRIMARY, UNIQUE, MULTIPLE, FULLTEXT, SPATIAL, FOREIGN_KEY};
   enum Keytype type;
   enum ha_key_alg algorithm;
   List<key_part_spec> columns;
-  const char *Name;
+  const char *name;
 
-  Key(enum Keytype type_par, enum ha_key_alg alg_par, const char *name_arg, List<key_part_spec> &cols)
-    :type(type_par), algorithm(alg_par), columns(cols), Name(name_arg)
+  Key(enum Keytype type_par, const char *name_arg, enum ha_key_alg alg_par,
+      List<key_part_spec> &cols)
+    :type(type_par), algorithm(alg_par), columns(cols), name(name_arg)
   {}
   ~Key() {}
-  const char *name() { return Name; }
 };
 
+class Table_ident;
+
+class foreign_key: public Key {
+public:
+  enum fk_match_opt { FK_MATCH_UNDEF, FK_MATCH_FULL,
+		      FK_MATCH_PARTIAL, FK_MATCH_SIMPLE};
+  enum fk_option { FK_OPTION_UNDEF, FK_OPTION_RESTRICT, FK_OPTION_CASCADE,
+		   FK_OPTION_SET_NULL, FK_OPTION_NO_ACTION, FK_OPTION_DEFAULT};
+
+  Table_ident *ref_table;
+  List<key_part_spec> ref_columns;
+  uint delete_opt, update_opt, match_opt;
+  foreign_key(const char *name_arg, List<key_part_spec> &cols,
+	      Table_ident *table,   List<key_part_spec> &ref_cols,
+	      uint delete_opt_arg, uint update_opt_arg, uint match_opt_arg)
+    :Key(FOREIGN_KEY, name_arg, HA_KEY_ALG_UNDEF, cols),
+    ref_table(table), ref_columns(cols),
+    delete_opt(delete_opt_arg), update_opt(update_opt_arg),
+    match_opt(match_opt_arg)
+  {}
+};
 
 typedef struct st_mysql_lock
 {
@@ -247,8 +270,8 @@ public:
 
 #include "sql_lex.h"				/* Must be here */
 
-// needed to be able to have an I_List of char* strings.in mysqld.cc where we cannot use String
-// because it is Sql_alloc'ed
+/* Needed to be able to have an I_List of char* strings in mysqld.cc. */
+
 class i_string: public ilink
 {
 public:
@@ -257,7 +280,7 @@ public:
   i_string(char* s) : ptr(s) {}
 };
 
-//needed for linked list of two strings for replicate-rewrite-db
+/* needed for linked list of two strings for replicate-rewrite-db */
 class i_string_pair: public ilink
 {
 public:
@@ -275,39 +298,42 @@ class delayed_insert;
 
 #define THD_CHECK_SENTRY(thd) DBUG_ASSERT(thd->dbug_sentry == THD_SENTRY_MAGIC)
 
-/* For each client connection we create a separate thread with THD serving as
-   a thread/connection descriptor */
+/*
+  For each client connection we create a separate thread with THD serving as
+  a thread/connection descriptor.
+*/
 
 class THD :public ilink {
 public:
-  NET	  net; // client connection descriptor
-  LEX	  lex; // parse tree descriptor
-  MEM_ROOT mem_root; // 1 command-life memory allocation pool
-  HASH     user_vars; // hash for user variables
-  String  packet; // dynamic string buffer used for network I/O		
-  struct  sockaddr_in remote; // client socket address
-  struct  rand_struct rand; // used for authentication
+  NET	  net;				// client connection descriptor
+  LEX	  lex;				// parse tree descriptor
+  MEM_ROOT mem_root;			// 1 command-life memory
+  HASH     user_vars;			// hash for user variables
+  String  packet;			// buffer used for network I/O		
+  struct  sockaddr_in remote;		// client socket address
+  struct  rand_struct rand;		// used for authentication
   
-  /* query points to the current query,
-     thread_stack is a pointer to the stack frame of handle_one_connection(),
-     which is called first in the thread for handling a client 
-   */
+  /*
+    Query points to the current query,
+    thread_stack is a pointer to the stack frame of handle_one_connection(),
+    which is called first in the thread for handling a client 
+  */
   char	  *query,*thread_stack;
   /*
     host - host of the client
     user - user of the client, set to NULL until the user has been read from
      the connection
-    priv_user - not sure why we have it, but it is set to "boot" when we run
-     with --bootstrap
+    priv_user - The user privilege we are using. May be '' for anonymous user.
     db - currently selected database
     ip - client IP
    */
   
   char	  *host,*user,*priv_user,*db,*ip;
-  /* proc_info points to a string that will show in the Info column of
-     SHOW PROCESSLIST output
-     host_or_ip points to host if host is available, otherwise points to ip   
-   */
+  /*
+    Proc_info points to a string that will show in the Info column of
+    SHOW PROCESSLIST output
+    host_or_ip points to host if host is available, otherwise points to ip   
+  */
   const   char *proc_info, *host_or_ip;
   
   /*
@@ -334,7 +360,8 @@ public:
    */
   TABLE   *open_tables,*temporary_tables, *handler_tables;
   // TODO: document the variables below
-  MYSQL_LOCK *lock,*locked_tables;
+  MYSQL_LOCK *lock;				/* Current locks */
+  MYSQL_LOCK *locked_tables;			/* Tables locked with LOCK */
   ULL	  *ull;
 #ifndef DBUG_OFF
   uint dbug_sentry; // watch out for memory corruption
@@ -538,7 +565,7 @@ public:
 #include "log_event.h"
 
 /*
-** This is used to get result from a select
+  This is used to get result from a select
 */
 
 class JOIN;
@@ -787,7 +814,6 @@ public:
 
  class multi_update : public select_result {
    TABLE_LIST *update_tables, *table_being_updated;
-//   Unique  **tempfiles;
    COPY_INFO *infos;
    TABLE **tmp_tables;
    THD *thd;

sql/sql_lex.h

@@ -154,6 +154,7 @@ typedef struct st_lex {
   sql_exchange *exchange;
 
   List<key_part_spec> col_list;
+  List<key_part_spec> ref_list;
   List<Alter_drop>    drop_list;
   List<Alter_column>  alter_list;
   List<String>	      interval_list;
@@ -167,7 +168,7 @@ typedef struct st_lex {
   SQL_LIST	      proc_list, auxilliary_table_list;
   TYPELIB	      *interval;
   create_field	      *last_field;
-  Item *default_value;
+  Item *default_value, *comment;
   CONVERT *convert_set;
   LEX_USER *grant_user;
   gptr yacc_yyss,yacc_yyvs;
@@ -178,14 +179,15 @@ typedef struct st_lex {
   LEX_MASTER_INFO mi;				// used by CHANGE MASTER
   ulong thread_id,type;
   enum_sql_command sql_command;
+  thr_lock_type lock_option;
   enum lex_states next_state;
   enum enum_duplicates duplicates;
   enum enum_tx_isolation tx_isolation;
   enum enum_ha_read_modes ha_read_mode;
   enum ha_rkey_function ha_rkey_mode;
   enum enum_enable_or_disable alter_keys_onoff;
-  uint grant,grant_tot_col,which_columns, union_option, mqh;
-  thr_lock_type lock_option;
+  uint grant, grant_tot_col, which_columns, union_option, mqh;
+  uint fk_delete_opt, fk_update_opt, fk_match_option;
   bool	drop_primary,drop_if_exists,local_file;
   bool  in_comment,ignore_space,verbose,simple_alter, option_type, derived_tables;
   uint slave_thd_opt;

sql/sql_parse.cc

@@ -2770,8 +2770,9 @@ link_in_list(SQL_LIST *list,byte *element,byte **next)
 
 bool add_field_to_list(char *field_name, enum_field_types type,
 		       char *length, char *decimals,
-		       uint type_modifier, Item *default_value,char *change,
-		       TYPELIB *interval)
+		       uint type_modifier,
+		       Item *default_value, Item *comment,
+		       char *change, TYPELIB *interval)
 {
   register create_field *new_field;
   THD	*thd=current_thd;
@@ -2787,14 +2788,14 @@ bool add_field_to_list(char *field_name, enum_field_types type,
   if (type_modifier & PRI_KEY_FLAG)
   {
     lex->col_list.push_back(new key_part_spec(field_name,0));
-    lex->key_list.push_back(new Key(Key::PRIMARY, HA_KEY_ALG_UNDEF, NullS,
+    lex->key_list.push_back(new Key(Key::PRIMARY, NullS, HA_KEY_ALG_UNDEF,
 				    lex->col_list));
     lex->col_list.empty();
   }
   if (type_modifier & (UNIQUE_FLAG | UNIQUE_KEY_FLAG))
   {
     lex->col_list.push_back(new key_part_spec(field_name,0));
-    lex->key_list.push_back(new Key(Key::UNIQUE, HA_KEY_ALG_UNDEF, NullS,
+    lex->key_list.push_back(new Key(Key::UNIQUE, NullS, HA_KEY_ALG_UNDEF,
 				    lex->col_list));
     lex->col_list.empty();
   }
@@ -2824,6 +2825,17 @@ bool add_field_to_list(char *field_name, enum_field_types type,
   new_field->change=change;
   new_field->interval=0;
   new_field->pack_length=0;
+  if (!comment)
+  {
+    new_field->comment.str=0;
+    new_field->comment.length=0;
+  }
+  else
+  {
+    /* In this case comment is always of type Item_string */
+    new_field->comment.str=   (char*) comment->str_value.ptr();
+    new_field->comment.length=comment->str_value.length();
+  }
   if (length)
     if (!(new_field->length= (uint) atoi(length)))
       length=0; /* purecov: inspected */

sql/sql_show.cc

@@ -454,8 +454,10 @@ mysqld_show_fields(THD *thd, TABLE_LIST *table_list,const char *wild,
   field_list.push_back(new Item_empty_string("Default",NAME_LEN));
   field_list.push_back(new Item_empty_string("Extra",20));
   if (verbose)
+  {
     field_list.push_back(new Item_empty_string("Privileges",80));
-
+    field_list.push_back(new Item_empty_string("Comment",255));
+  }
         // Send first number of fields and records
   {
     char *pos;
@@ -522,7 +524,7 @@ mysqld_show_fields(THD *thd, TABLE_LIST *table_list,const char *wild,
 
 	if (verbose)
 	{
-	  /* Add grant options */
+	  /* Add grant options & comments */
 	  col_access= get_column_grant(thd,table_list,field) & COL_ACLS;
 	  end=tmp;
 	  for (uint bitnr=0; col_access ; col_access>>=1,bitnr++)
@@ -534,6 +536,7 @@ mysqld_show_fields(THD *thd, TABLE_LIST *table_list,const char *wild,
 	    }
 	  }
 	  net_store_data(packet,convert, tmp+1,end == tmp ? 0 : (uint) (end-tmp-1));
+	  net_store_data(packet, field->comment.str,field->comment.length);
 	}
         if (my_net_write(&thd->net,(char*) packet->ptr(),packet->length()))
           DBUG_RETURN(1);
@@ -571,21 +574,28 @@ mysqld_show_create(THD *thd, TABLE_LIST *table_list)
   {
     packet->length(0);
     net_store_data(packet,convert, table->table_name);
-    // a hack - we need to reserve some space for the length before
-    // we know what it is - let's assume that the length of create table
-    // statement will fit into 3 bytes ( 16 MB max :-) )
+    /*
+      A hack - we need to reserve some space for the length before
+      we know what it is - let's assume that the length of create table
+      statement will fit into 3 bytes ( 16 MB max :-) )
+    */
     ulong store_len_offset = packet->length();
     packet->length(store_len_offset + 4);
     if (store_create_info(thd, table, packet))
       DBUG_RETURN(-1);
     ulong create_len = packet->length() - store_len_offset - 4;
+    /*
+      Just in case somebody manages to create a table
+      with *that* much stuff in the definition
+    */
     if (create_len > 0x00ffffff) // better readable in HEX ...
-      DBUG_RETURN(1);  // just in case somebody manages to create a table
-    // with *that* much stuff in the definition
+      DBUG_RETURN(1); 
 
-    // now we have to store the length in three bytes, even if it would fit
-    // into fewer, so we cannot use net_store_data() anymore,
-    // and do it ourselves
+    /*
+      Now we have to store the length in three bytes, even if it would fit
+      into fewer, so we cannot use net_store_data() anymore,
+      and do it ourselves
+    */
     char* p = (char*)packet->ptr() + store_len_offset;
     *p++ = (char) 253; // The client the length is stored using 3-bytes
     int3store(p, create_len);
@@ -848,10 +858,10 @@ store_create_info(THD *thd, TABLE *table, String *packet)
       {                                             // Not null by default
         type.set(tmp,sizeof(tmp),default_charset_info);
         field->val_str(&type,&type);
-        packet->append('\'');
 	if (type.length())
-          append_unescaped(packet, type.c_ptr());
-        packet->append('\'');
+          append_unescaped(packet, type.ptr(), type.length());
+        else
+	  packet->append("''",2);
       }
       else if (field->maybe_null())
         packet->append("NULL", 4);                    // Null as default
@@ -860,7 +870,13 @@ store_create_info(THD *thd, TABLE *table, String *packet)
     }
 
     if (field->unireg_check == Field::NEXT_NUMBER)
-          packet->append(" auto_increment", 15 );
+      packet->append(" auto_increment", 15 );
+
+    if (field->comment.length)
+    {
+      packet->append(" COMMENT ",9);
+      append_unescaped(packet, field->comment.str, field->comment.length);
+    }
   }
 
   KEY *key_info=table->key_info;
@@ -890,8 +906,9 @@ store_create_info(THD *thd, TABLE *table, String *packet)
      append_identifier(thd,packet,key_info->name);
 
     // +BAR: send USING only in non-default case: non-spatial rtree
-    if((key_info->algorithm == HA_KEY_ALG_RTREE) && !(key_info->flags & HA_SPATIAL))
-          packet->append(" USING RTREE",12);
+    if((key_info->algorithm == HA_KEY_ALG_RTREE) &&
+       !(key_info->flags & HA_SPATIAL))
+      packet->append(" USING RTREE",12);
 
     packet->append(" (", 2);
 
@@ -972,9 +989,8 @@ store_create_info(THD *thd, TABLE *table, String *packet)
   table->file->append_create_info(packet);
   if (table->comment && table->comment[0])
   {
-    packet->append(" COMMENT='", 10);
-    append_unescaped(packet, table->comment);
-    packet->append('\'');
+    packet->append(" COMMENT=", 9);
+    append_unescaped(packet, table->comment, strlen(table->comment));
   }
   if (file->raid_type)
   {

sql/sql_table.cc

@@ -266,7 +266,7 @@ int mysql_create_table(THD *thd,const char *db, const char *table_name,
   DBUG_ENTER("mysql_create_table");
 
   /*
-  ** Check for duplicate fields and check type of table to create
+    Check for duplicate fields and check type of table to create
   */
 
   if (!fields.elements)
@@ -398,35 +398,50 @@ int mysql_create_table(THD *thd,const char *db, const char *table_name,
   /* Create keys */
 
   List_iterator<Key> key_iterator(keys);
-  uint key_parts=0,key_count=keys.elements;
+  uint key_parts=0, key_count=0, fk_key_count=0;
   List<Key> keys_in_order;			// Add new keys here
   bool primary_key=0,unique_key=0;
   Key *key;
   uint tmp, key_number;
-  tmp=min(file->max_keys(), MAX_KEY);
-  if (key_count > tmp)
-  {
-    my_error(ER_TOO_MANY_KEYS,MYF(0),tmp);
-    DBUG_RETURN(-1);
-  }
 
   /* Calculate number of key segements */
 
   while ((key=key_iterator++))
   {
+    if (key->type == Key::FOREIGN_KEY)
+    {
+      fk_key_count++;
+      foreign_key *fk_key= (foreign_key*) key;
+      if (fk_key->ref_columns.elements &&
+	  fk_key->ref_columns.elements != fk_key->columns.elements)
+      {
+	my_error(ER_WRONG_FK_DEF, MYF(0), fk_key->name ? fk_key->name :
+		 "foreign key without name",
+		 ER(ER_KEY_REF_DO_NOT_MATCH_TABLE_REF));
+	DBUG_RETURN(-1);
+      }
+      continue;
+    }
+    key_count++;
     tmp=max(file->max_key_parts(),MAX_REF_PARTS);
     if (key->columns.elements > tmp)
     {
       my_error(ER_TOO_MANY_KEY_PARTS,MYF(0),tmp);
       DBUG_RETURN(-1);
     }
-    if (key->name() && strlen(key->name()) > NAME_LEN)
+    if (key->name && strlen(key->name) > NAME_LEN)
     {
-      my_error(ER_TOO_LONG_IDENT, MYF(0), key->name());
+      my_error(ER_TOO_LONG_IDENT, MYF(0), key->name);
       DBUG_RETURN(-1);
     }
     key_parts+=key->columns.elements;
   }
+  tmp=min(file->max_keys(), MAX_KEY);
+  if (key_count > tmp)
+  {
+    my_error(ER_TOO_MANY_KEYS,MYF(0),tmp);
+    DBUG_RETURN(-1);
+  }
 
   key_info_buffer=key_info=(KEY*) sql_calloc(sizeof(KEY)*key_count);
   key_part_info=(KEY_PART_INFO*) sql_calloc(sizeof(KEY_PART_INFO)*key_parts);
@@ -450,7 +465,10 @@ int mysql_create_table(THD *thd,const char *db, const char *table_name,
       case Key::SPATIAL:
         key_info->flags = HA_SPATIAL;
         break;
-      default:
+    case Key::FOREIGN_KEY:
+      key_number--;				// Skip this key
+      continue;
+    default:
         key_info->flags = HA_NOSAME;
     }
 
@@ -623,7 +641,7 @@ int mysql_create_table(THD *thd,const char *db, const char *table_name,
 	  key_name=primary_key_name;
 	  primary_key=1;
 	}
-	else if (!(key_name = key->name()))
+	else if (!(key_name = key->name))
 	  key_name=make_unique_key_name(sql_field->field_name,
 					key_info_buffer,key_info);
 	if (check_if_keyname_exists(key_name,key_info_buffer,key_info))
@@ -1395,7 +1413,7 @@ int mysql_alter_table(THD *thd,char *new_db, char *new_name,
   List<Key> key_list;				// Add new keys here
 
   /*
-  ** First collect all fields from table which isn't in drop_list
+    First collect all fields from table which isn't in drop_list
   */
 
   create_field *def;
@@ -1511,8 +1529,8 @@ int mysql_alter_table(THD *thd,char *new_db, char *new_name,
   }
 
   /*
-  ** Collect all keys which isn't in drop list. Add only those
-  ** for which some fields exists.
+    Collect all keys which isn't in drop list. Add only those
+    for which some fields exists.
   */
 
   List_iterator<Key> key_it(keys);
@@ -1583,18 +1601,20 @@ int mysql_alter_table(THD *thd,char *new_db, char *new_name,
 				 (!my_strcasecmp(system_charset_info,
                                                  key_name, "PRIMARY") ?
 				  Key::PRIMARY  : Key::UNIQUE) :
-                                 (key_info->flags & HA_FULLTEXT ?
-                                 Key::FULLTEXT : Key::MULTIPLE)),
+				  (key_info->flags & HA_FULLTEXT ?
+				   Key::FULLTEXT : Key::MULTIPLE)),
+				 key_name,
                                  key_info->algorithm,
-				 key_name,key_parts));
+				 key_parts));
   }
-  key_it.rewind();
   {
     Key *key;
     while ((key=key_it++))			// Add new keys
-      key_list.push_back(key);
+    {
+      if (key->type != Key::FOREIGN_KEY)
+	key_list.push_back(key);
+    }
   }
-
   if (drop_list.elements)
   {
     my_error(ER_CANT_DROP_FIELD_OR_KEY,MYF(0),drop_list.head()->name);
@@ -1764,9 +1784,9 @@ int mysql_alter_table(THD *thd,char *new_db, char *new_name,
     goto err;
   }
   /*
-  ** Data is copied.  Now we rename the old table to a temp name,
-  ** rename the new one to the old name, remove all entries from the old table
-  ** from the cash, free all locks, close the old table and remove it.
+    Data is copied.  Now we rename the old table to a temp name,
+    rename the new one to the old name, remove all entries from the old table
+    from the cash, free all locks, close the old table and remove it.
   */
 
   thd->proc_info="rename result table";

sql/sql_yacc.yy

@@ -302,6 +302,7 @@ bool my_yyoverflow(short **a, YYSTYPE **b,int *yystacksize);
 %token	SET
 %token	SERIALIZABLE_SYM
 %token	SESSION_SYM
+%token	SIMPLE_SYM
 %token	SHUTDOWN
 %token	SPATIAL_SYM
 %token	SQL_CACHE_SYM
@@ -520,7 +521,7 @@ bool my_yyoverflow(short **a, YYSTYPE **b,int *yystacksize);
 	opt_table_alias
 
 %type <table>
-	table_ident
+	table_ident references
 
 %type <simple_string>
 	remember_name remember_end opt_len opt_ident opt_db text_or_password
@@ -532,7 +533,7 @@ bool my_yyoverflow(short **a, YYSTYPE **b,int *yystacksize);
 %type <num>
 	type int_type real_type order_dir opt_field_spec set_option lock_option
 	udf_type if_exists opt_local opt_table_options table_options
-	table_option opt_if_not_exists 
+	table_option opt_if_not_exists delete_option 
 
 %type <ulong_num>
 	ULONG_NUM raid_types merge_insert_types
@@ -600,7 +601,7 @@ bool my_yyoverflow(short **a, YYSTYPE **b,int *yystacksize);
 	opt_precision opt_ignore opt_column opt_restrict
 	grant revoke set lock unlock string_list field_options field_option
 	field_opt_list opt_binary table_lock_list table_lock varchar
-	references opt_on_delete opt_on_delete_list opt_on_delete_item use
+	ref_list opt_on_delete opt_on_delete_list opt_on_delete_item use
 	opt_delete_options opt_delete_option
 	opt_outer table_list table_name opt_option opt_place opt_low_priority
 	opt_attribute opt_attribute_list attribute column_list column_list_id
@@ -612,7 +613,7 @@ bool my_yyoverflow(short **a, YYSTYPE **b,int *yystacksize);
 	table_to_table_list table_to_table opt_table_list opt_as
 	handler_rkey_function handler_read_or_scan
 	single_multi table_wild_list table_wild_one opt_wild union union_list
-	precision union_option
+	precision union_option opt_on_delete_item
 END_OF_INPUT
 
 %type <NONE>
@@ -756,6 +757,7 @@ create:
 	  bzero((char*) &lex->create_info,sizeof(lex->create_info));
 	  lex->create_info.options=$2 | $4;
 	  lex->create_info.db_type= default_table_type;
+	  lex->create_info.table_charset=default_charset_info;
 	}
 	create2
 
@@ -774,7 +776,7 @@ create:
 	  {
 	    LEX *lex=Lex;
 
-	    lex->key_list.push_back(new Key($2,$5,$4.str,lex->col_list));
+	    lex->key_list.push_back(new Key($2,$4.str, $5, lex->col_list));
 	    lex->col_list.empty();
 	  }
 	| CREATE DATABASE opt_if_not_exists ident default_charset
@@ -924,12 +926,19 @@ field_list_item:
 	| key_type opt_ident key_alg '(' key_list ')'
 	  {
 	    LEX *lex=Lex;
-	    lex->key_list.push_back(new Key($1,$3,$2,lex->col_list));
+	    lex->key_list.push_back(new Key($1,$2, $3, lex->col_list));
 	    lex->col_list.empty();		/* Alloced by sql_alloc */
 	  }
 	| opt_constraint FOREIGN KEY_SYM opt_ident '(' key_list ')' references
 	  {
-	    Lex->col_list.empty();		/* Alloced by sql_alloc */
+	    LEX *lex=Lex;
+	    lex->key_list.push_back(new foreign_key($4, lex->col_list,
+				    $8,
+				    lex->ref_list,
+				    lex->fk_delete_opt,
+				    lex->fk_update_opt,
+				    lex->fk_match_option));
+	    lex->col_list.empty();		/* Alloced by sql_alloc */
 	  }
 	| opt_constraint CHECK_SYM '(' expr ')'
 	  {
@@ -945,7 +954,7 @@ field_spec:
 	 {
 	   LEX *lex=Lex;
 	   lex->length=lex->dec=0; lex->type=0; lex->interval=0;
-	   lex->default_value=0;
+	   lex->default_value=lex->comment=0;
 	 }
 	type opt_attribute
 	{
@@ -953,8 +962,8 @@ field_spec:
 	  if (add_field_to_list($1.str,
 				(enum enum_field_types) $3,
 				lex->length,lex->dec,lex->type,
-				lex->default_value,lex->change,
-				lex->interval))
+				lex->default_value, lex->comment,
+				lex->change,lex->interval))
 	    YYABORT;
 	}
 
@@ -1093,6 +1102,7 @@ attribute:
 	| PRIMARY_SYM KEY_SYM { Lex->type|= PRI_KEY_FLAG | NOT_NULL_FLAG; }
 	| UNIQUE_SYM	  { Lex->type|= UNIQUE_FLAG; }
 	| UNIQUE_SYM KEY_SYM { Lex->type|= UNIQUE_KEY_FLAG; }
+	| COMMENT_SYM text_literal { Lex->comment= $2; }
 
 opt_binary:
 	/* empty */		{ Lex->charset=default_charset_info; }
@@ -1122,11 +1132,25 @@ default_charset:
 	  }
 
 references:
-	REFERENCES table_ident opt_on_delete {}
-	| REFERENCES table_ident '(' key_list ')' opt_on_delete
-	  {
-	    Lex->col_list.empty();		/* Alloced by sql_alloc */
-	  }
+	REFERENCES table_ident
+	{
+	  LEX *lex=Lex;	
+	  lex->fk_delete_opt= lex->fk_update_opt= lex->fk_match_option= 0;
+	  lex->ref_list.empty();
+	}
+	opt_ref_list
+	{
+	  $$=$2;
+	}
+	
+opt_ref_list:
+	/* empty */ {}
+	| '(' ref_list ')' opt_on_delete {}
+
+ref_list:
+	ref_list ',' ident	{ Lex->ref_list.push_back(new key_part_spec($3.str)); }
+	| ident			{ Lex->ref_list.push_back(new key_part_spec($1.str)); }
+
 
 opt_on_delete:
 	/* empty */ {}
@@ -1136,19 +1160,19 @@ opt_on_delete_list:
 	opt_on_delete_list opt_on_delete_item {}
 	| opt_on_delete_item {}
 
-
 opt_on_delete_item:
-	ON DELETE_SYM delete_option {}
-	| ON UPDATE_SYM delete_option {}
-	| MATCH FULL	{}
-	| MATCH PARTIAL {}
+	ON DELETE_SYM delete_option   { Lex->fk_delete_opt= $3; }
+	| ON UPDATE_SYM delete_option { Lex->fk_update_opt= $3; }
+	| MATCH FULL	{ Lex->fk_match_option= foreign_key::FK_MATCH_FULL; }
+	| MATCH PARTIAL { Lex->fk_match_option= foreign_key::FK_MATCH_PARTIAL; }
+	| MATCH SIMPLE_SYM { Lex->fk_match_option= foreign_key::FK_MATCH_SIMPLE; }
 
 delete_option:
-	RESTRICT	 {}
-	| CASCADE	 {}
-	| SET NULL_SYM {}
-	| NO_SYM ACTION {}
-	| SET DEFAULT {}
+	RESTRICT	 { $$= (int) foreign_key::FK_OPTION_RESTRICT; }
+	| CASCADE	 { $$= (int) foreign_key::FK_OPTION_CASCADE; }
+	| SET NULL_SYM   { $$= (int) foreign_key::FK_OPTION_SET_NULL; }
+	| NO_SYM ACTION  { $$= (int) foreign_key::FK_OPTION_NO_ACTION; }
+	| SET DEFAULT    { $$= (int) foreign_key::FK_OPTION_DEFAULT;  }
 
 key_type:
 	opt_constraint PRIMARY_SYM KEY_SYM  { $$= Key::PRIMARY; }
@@ -1225,6 +1249,7 @@ alter:
     	  bzero((char*) &lex->create_info,sizeof(lex->create_info));
 	  lex->create_info.db_type= DB_TYPE_DEFAULT;
 	  lex->create_info.row_type= ROW_TYPE_NOT_USED;
+	  lex->create_info.table_charset=default_charset_info;
           lex->alter_keys_onoff=LEAVE_AS_IS;
           lex->simple_alter=1;
 	}
@@ -1246,23 +1271,9 @@ alter_list_item:
 	     lex->change= $3.str; lex->simple_alter=0;
 	  }
           field_spec opt_place
-	| MODIFY_SYM opt_column field_ident
+	| MODIFY_SYM opt_column field_spec
 	  {
-	    LEX *lex=Lex;
-	    lex->length=lex->dec=0; lex->type=0; lex->interval=0;
-	    lex->default_value=0;
-            lex->simple_alter=0;
-	  }
-	  type opt_attribute
-	  {
-	    LEX *lex=Lex;
-	    if (add_field_to_list($3.str,
-				  (enum enum_field_types) $5,
-				  lex->length,lex->dec,lex->type,
-				  lex->default_value, $3.str,
-				  lex->interval))
-	     YYABORT;
-             lex->simple_alter=0;
+            Lex->simple_alter=0;
 	  }
 	  opt_place
 	| DROP opt_column field_ident opt_restrict
@@ -3209,6 +3220,7 @@ keyword:
 	| OFF			{}
 	| OPEN_SYM		{}
 	| PACK_KEYS_SYM		{}
+	| PARTIAL		{}
 	| PASSWORD		{}
 	| PREV_SYM		{}
 	| PROCESS		{}
@@ -3220,8 +3232,8 @@ keyword:
 	| RAID_CHUNKSIZE	{}
 	| RAID_STRIPED_SYM      {}
 	| RAID_TYPE		{}
-        | RELAY_LOG_FILE_SYM {}
-        | RELAY_LOG_POS_SYM {}
+        | RELAY_LOG_FILE_SYM	{}
+        | RELAY_LOG_POS_SYM	{}
 	| RELOAD		{}
 	| REPAIR		{}
 	| REPEATABLE_SYM	{}
@@ -3235,6 +3247,7 @@ keyword:
 	| SERIALIZABLE_SYM	{}
 	| SESSION_SYM		{}
 	| SIGNED_SYM		{}
+	| SIMPLE_SYM		{}
 	| SHARE_SYM		{}
 	| SHUTDOWN		{}
         | SLAVE		        {}

sql/unireg.cc

@@ -28,7 +28,7 @@
 #include "mysql_priv.h"
 #include <m_ctype.h>
 
-#define FCOMP			11		/* Byte per packat f{lt */
+#define FCOMP			11		/* Byte for packed field */
 
 static uchar * pack_screens(List<create_field> &create_fields,
 			    uint *info_length, uint *screens, bool small_file);
@@ -255,10 +255,11 @@ static uint pack_keys(uchar *keybuff,uint key_count,KEY *keyinfo)
   key_parts=0;
   for (key=keyinfo,end=keyinfo+key_count ; key != end ; key++)
   {
-    pos[0]=(uchar) (key->flags ^ HA_NOSAME);
-    int2store(pos+1,key->key_length);
-    pos[3]=key->key_parts;
-    pos+=4;
+    int2store(pos, (key->flags ^ HA_NOSAME));
+    int2store(pos+2,key->key_length);
+    pos[4]= (uchar) key->key_parts;
+    pos[5]= (uchar) key->algorithm;
+    pos+=8;
     key_parts+=key->key_parts;
     DBUG_PRINT("loop",("flags: %d  key_parts: %d at %lx",
 		       key->flags,key->key_parts,
@@ -290,13 +291,6 @@ static uint pack_keys(uchar *keybuff,uint key_count,KEY *keyinfo)
   }
   *(pos++)=0;
 
-  /* For MySQL 4.0;  Store key algoritms last */
-  key_alg_pos= pos;
-  for (key=keyinfo ; key != end ; key++)
-  {
-    *(pos++)= (uchar) key->algorithm;
-  }
-
   keybuff[0]=(uchar) key_count;
   keybuff[1]=(uchar) key_parts;
   length=(uint) (keyname_pos-keybuff);
@@ -314,8 +308,8 @@ static bool pack_header(uchar *forminfo, enum db_type table_type,
 			uint info_length, uint screens,uint table_options,
 			handler *file)
 {
-  uint length,int_count,int_length,no_empty, int_parts,
-    time_stamp_pos,null_fields;
+  uint length,int_count,int_length,no_empty, int_parts;
+  uint time_stamp_pos,null_fields, com_length;
   ulong reclength,totlength,n_length;
   DBUG_ENTER("pack_header");
 
@@ -326,7 +320,8 @@ static bool pack_header(uchar *forminfo, enum db_type table_type,
   }
 
   totlength=reclength=0L;
-  no_empty=int_count=int_parts=int_length=time_stamp_pos=null_fields=0;
+  no_empty=int_count=int_parts=int_length=time_stamp_pos=null_fields=
+    com_length=0;
   n_length=2L;
 
 	/* Check fields */
@@ -336,6 +331,7 @@ static bool pack_header(uchar *forminfo, enum db_type table_type,
   while ((field=it++))
   {
     totlength+= field->length;
+    com_length+= field->comment.length;
     if (MTYP_TYPENR(field->unireg_check) == Field::NOEMPTY ||
 	field->unireg_check & MTYP_NOEMPTY_BIT)
     {
@@ -378,14 +374,15 @@ static bool pack_header(uchar *forminfo, enum db_type table_type,
   /* Hack to avoid bugs with small static rows in MySQL */
   reclength=max(file->min_record_length(table_options),reclength);
   if (info_length+(ulong) create_fields.elements*FCOMP+288+
-      n_length+int_length > 65535L || int_count > 255)
+      n_length+int_length+com_length > 65535L || int_count > 255)
   {
     my_error(ER_TOO_MANY_FIELDS,MYF(0));
     DBUG_RETURN(1);
   }
 
   bzero((char*)forminfo,288);
-  length=info_length+create_fields.elements*FCOMP+288+n_length+int_length;
+  length=(info_length+create_fields.elements*FCOMP+288+n_length+int_length+
+	  com_length);
   int2store(forminfo,length);
   forminfo[256] = (uint8) screens;
   int2store(forminfo+258,create_fields.elements);
@@ -401,6 +398,7 @@ static bool pack_header(uchar *forminfo, enum db_type table_type,
   int2store(forminfo+278,80);			/* Columns needed */
   int2store(forminfo+280,22);			/* Rows needed */
   int2store(forminfo+282,null_fields);
+  int2store(forminfo+284,com_length);
   DBUG_RETURN(0);
 } /* pack_header */
 
@@ -438,7 +436,7 @@ static uint get_interval_id(uint *int_count,List<create_field> &create_fields,
 static bool pack_fields(File file,List<create_field> &create_fields)
 {
   reg2 uint i;
-  uint int_count;
+  uint int_count, comment_length=0;
   uchar buff[MAX_FIELD_WIDTH];
   create_field *field;
   DBUG_ENTER("pack_fields");
@@ -459,6 +457,11 @@ static bool pack_fields(File file,List<create_field> &create_fields)
     int2store(buff+6,field->pack_flag);
     int2store(buff+8,field->unireg_check);
     buff[10]= (uchar) field->interval_id;
+    buff[11]= (uchar) field->sql_type; 
+    buff[12]= (uchar) (field->charset ? field->charset->number :
+		       default_charset_info->number);
+    int2store(buff, field->comment.length);
+    comment_length+= field->comment.length;
     set_if_bigger(int_count,field->interval_id);
     if (my_write(file,(byte*) buff,FCOMP,MYF_RW))
       DBUG_RETURN(1);
@@ -505,6 +508,18 @@ static bool pack_fields(File file,List<create_field> &create_fields)
     if (my_write(file,(byte*) tmp.ptr(),tmp.length(),MYF_RW))
       DBUG_RETURN(1);
   }
+  if (comment_length)
+  {
+    it.rewind();
+    int_count=0;
+    while ((field=it++))
+    {
+      if (field->comment.length)
+	if (my_write(file, (byte*) field->comment.str, field->comment.length,
+		     MYF_RW))
+	  DBUG_RETURN(1);
+    }
+  }
   DBUG_RETURN(0);
 }
 
@@ -557,6 +572,7 @@ static bool make_empty_rec(File file,enum db_type table_type,
 			       null_pos+null_count/8,
 			       1 << (null_count & 7),
 			       field->pack_flag,
+			       field->sql_type,
 			       field->unireg_check,
 			       field->interval,
 			       field->field_name,