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mysql/src/5.1-dbg/sql/sql_db.cc File Reference

#include "mysql_priv.h"
#include <mysys_err.h>
#include "sp.h"
#include "events.h"
#include <my_dir.h>
#include <m_ctype.h>

Include dependency graph for sql_db.cc:

Go to the source code of this file.

Classes
struct	my_dblock_st
struct	my_dbopt_st
Defines
#define	MAX_DROP_TABLE_Q_LEN   1024
Typedefs
typedef my_dblock_st	my_dblock_t
typedef my_dbopt_st	my_dbopt_t
Functions
static long	mysql_rm_known_files (THD *thd, MY_DIR *dirp, const char *db, const char *path, uint level, TABLE_LIST **dropped_tables)
static long	mysql_rm_arc_files (THD *thd, MY_DIR *dirp, const char *org_path)
static my_bool	rm_dir_w_symlink (const char *org_path, my_bool send_error)
static byte *	lock_db_get_key (my_dblock_t *ptr, uint *length, my_bool not_used __attribute__((unused)))
static void	lock_db_free_element (void *ptr)
static my_bool	lock_db_insert (const char *dbname, uint length)
void	lock_db_delete (const char *name, uint length)
static byte *	dboptions_get_key (my_dbopt_t *opt, uint *length, my_bool not_used __attribute__((unused)))
static void	write_to_binlog (THD *thd, char *query, uint q_len, char *db, uint db_len)
static void	free_dbopt (void *dbopt)
bool	my_database_names_init (void)
void	my_database_names_free (void)
void	my_dbopt_cleanup (void)
static my_bool	get_dbopt (const char *dbname, HA_CREATE_INFO *create)
static my_bool	put_dbopt (const char *dbname, HA_CREATE_INFO *create)
void	del_dbopt (const char *path)
static bool	write_db_opt (THD *thd, const char *path, HA_CREATE_INFO *create)
bool	load_db_opt (THD *thd, const char *path, HA_CREATE_INFO *create)
bool	load_db_opt_by_name (THD *thd, const char *db_name, HA_CREATE_INFO *db_create_info)
bool	mysql_create_db (THD *thd, char *db, HA_CREATE_INFO *create_info, bool silent)
bool	mysql_alter_db (THD *thd, const char *db, HA_CREATE_INFO *create_info)
bool	mysql_rm_db (THD *thd, char *db, bool if_exists, bool silent)
bool	mysql_change_db (THD *thd, const char *name, bool no_access_check)
static int	lock_databases (THD *thd, const char *db1, uint length1, const char *db2, uint length2)
bool	mysql_rename_db (THD *thd, LEX_STRING *old_db, LEX_STRING *new_db)
bool	check_db_dir_existence (const char *db_name)
Variables
const char *	del_exts [] = {".frm", ".BAK", ".TMD",".opt", NullS}
static TYPELIB	deletable_extentions
HASH	lock_db_cache
pthread_mutex_t	LOCK_lock_db
int	creating_database = 0
static HASH	dboptions
static my_bool	dboptions_init = 0
static rw_lock_t	LOCK_dboptions

---

Define Documentation

#define MAX_DROP_TABLE_Q_LEN   1024

Definition at line 30 of file sql_db.cc.

Referenced by mysql_rm_db().

---

Typedef Documentation

typedef struct my_dblock_st my_dblock_t

typedef struct my_dbopt_st my_dbopt_t

---

Function Documentation

bool check_db_dir_existence

(

const char *

db_name

)

Definition at line 1728 of file sql_db.cc.

References build_table_filename(), F_OK, FN_LIBCHAR, FN_REFLEN, and my_access.

Referenced by mysql_change_db(), and mysqld_show_create_db().

{
  char db_dir_path[FN_REFLEN];
  uint db_dir_path_len;

  db_dir_path_len= build_table_filename(db_dir_path, sizeof(db_dir_path),
                                        db_name, "", "", 0);

  if (db_dir_path_len && db_dir_path[db_dir_path_len - 1] == FN_LIBCHAR)
    db_dir_path[db_dir_path_len - 1]= 0;

  /* Check access. */

  return my_access(db_dir_path, F_OK);
}

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static byte* dboptions_get_key	(	my_dbopt_t *	opt,
		uint *	length,
		my_bool not_used	__attribute__((unused))
	)			[static]

Definition at line 161 of file sql_db.cc.

References opt().

Referenced by my_database_names_init(), and my_dbopt_cleanup().

{
  *length= opt->name_length;
  return (byte*) opt->name;
}

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void del_dbopt

(

const char *

path

)

Definition at line 351 of file sql_db.cc.

References dboptions, hash_delete(), hash_search(), LOCK_dboptions, opt(), rw_unlock, rw_wrlock, and strlen().

Referenced by mysql_rm_db().

{
  my_dbopt_t *opt;
  rw_wrlock(&LOCK_dboptions);
  if ((opt= (my_dbopt_t *)hash_search(&dboptions, (const byte*) path,
                                      strlen(path))))
    hash_delete(&dboptions, (byte*) opt);
  rw_unlock(&LOCK_dboptions);
}

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static void free_dbopt

(

void *

dbopt

)

[static]

Definition at line 188 of file sql_db.cc.

References my_free, and MYF.

Referenced by my_database_names_init(), and my_dbopt_cleanup().

{
  my_free((gptr) dbopt, MYF(0));
}

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static my_bool get_dbopt	(	const char *	dbname,
		HA_CREATE_INFO *	create
	)			[static]

Definition at line 274 of file sql_db.cc.

References dboptions, st_ha_create_information::default_table_charset, error, hash_search(), LOCK_dboptions, opt(), rw_rdlock, rw_unlock, and strlen().

Referenced by load_db_opt().

{
  my_dbopt_t *opt;
  uint length;
  my_bool error= 1;
  
  length= (uint) strlen(dbname);
  
  rw_rdlock(&LOCK_dboptions);
  if ((opt= (my_dbopt_t*) hash_search(&dboptions, (byte*) dbname, length)))
  {
    create->default_table_charset= opt->charset;
    error= 0;
  }
  rw_unlock(&LOCK_dboptions);
  return error;
}

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bool load_db_opt	(	THD *	thd,
		const char *	path,
		HA_CREATE_INFO *	create
	)

Definition at line 418 of file sql_db.cc.

References buf, bzero, DBUG_ENTER, DBUG_RETURN, default_charset_info, end_io_cache(), ER, ER_UNKNOWN_CHARACTER_SET, ER_UNKNOWN_COLLATION, error, get_charset_by_csname(), get_charset_by_name(), get_dbopt(), init_io_cache(), IO_SIZE, my_b_gets(), my_charset_latin1, my_close(), MY_CS_PRIMARY, my_isgraph, my_open(), MYF, O_SHARE, pos(), put_dbopt(), READ_CACHE, sql_print_error(), and strchr().

Referenced by load_db_opt_by_name(), and mysql_rename_db().

{
  File file;
  char buf[256];
  DBUG_ENTER("load_db_opt");
  bool error=1;
  uint nbytes;

  bzero((char*) create,sizeof(*create));
  create->default_table_charset= thd->variables.collation_server;

  /* Check if options for this database are already in the hash */
  if (!get_dbopt(path, create))
    DBUG_RETURN(0);

  /* Otherwise, load options from the .opt file */
  if ((file=my_open(path, O_RDONLY | O_SHARE, MYF(0))) < 0)
    goto err1;

  IO_CACHE cache;
  if (init_io_cache(&cache, file, IO_SIZE, READ_CACHE, 0, 0, MYF(0)))
    goto err2;

  while ((int) (nbytes= my_b_gets(&cache, (char*) buf, sizeof(buf))) > 0)
  {
    char *pos= buf+nbytes-1;
    /* Remove end space and control characters */
    while (pos > buf && !my_isgraph(&my_charset_latin1, pos[-1]))
      pos--;
    *pos=0;
    if ((pos= strchr(buf, '=')))
    {
      if (!strncmp(buf,"default-character-set", (pos-buf)))
      {
        /*
           Try character set name, and if it fails
           try collation name, probably it's an old
           4.1.0 db.opt file, which didn't have
           separate default-character-set and
           default-collation commands.
        */
        if (!(create->default_table_charset=
        get_charset_by_csname(pos+1, MY_CS_PRIMARY, MYF(0))) &&
            !(create->default_table_charset=
              get_charset_by_name(pos+1, MYF(0))))
        {
          sql_print_error("Error while loading database options: '%s':",path);
          sql_print_error(ER(ER_UNKNOWN_CHARACTER_SET),pos+1);
          create->default_table_charset= default_charset_info;
        }
      }
      else if (!strncmp(buf,"default-collation", (pos-buf)))
      {
        if (!(create->default_table_charset= get_charset_by_name(pos+1,
                                                           MYF(0))))
        {
          sql_print_error("Error while loading database options: '%s':",path);
          sql_print_error(ER(ER_UNKNOWN_COLLATION),pos+1);
          create->default_table_charset= default_charset_info;
        }
      }
    }
  }
  /*
    Put the loaded value into the hash.
    Note that another thread could've added the same
    entry to the hash after we called get_dbopt(),
    but it's not an error, as put_dbopt() takes this
    possibility into account.
  */
  error= put_dbopt(path, create);

  end_io_cache(&cache);
err2:
  my_close(file,MYF(0));
err1:
  DBUG_RETURN(error);
}

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bool load_db_opt_by_name	(	THD *	thd,
		const char *	db_name,
		HA_CREATE_INFO *	db_create_info
	)

Definition at line 528 of file sql_db.cc.

References build_table_filename(), FN_REFLEN, and load_db_opt().

Referenced by sp_head::fill_field_definition(), fill_schema_shemata(), mysql_change_db(), mysqld_show_create_db(), and set_table_default_charset().

{
  char db_opt_path[FN_REFLEN];

  /*
    Pass an empty file name, and the database options file name as extension
    to avoid table name to file name encoding.
  */
  (void) build_table_filename(db_opt_path, sizeof(db_opt_path),
                              db_name, "", MY_DB_OPT_FILE, 0);

  return load_db_opt(thd, db_opt_path, db_create_info);
}

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static int lock_databases	(	THD *	thd,
		const char *	db1,
		uint	length1,
		const char *	db2,
		uint	length2
	)			[static]

Definition at line 1407 of file sql_db.cc.

References COND_refresh, creating_database, creating_table, hash_search(), lock_db_cache, lock_db_delete(), lock_db_insert(), LOCK_lock_db, pthread_mutex_lock, pthread_mutex_unlock, and wait_for_condition().

Referenced by mysql_rename_db().

{
  pthread_mutex_lock(&LOCK_lock_db);
  while (!thd->killed &&
         (hash_search(&lock_db_cache,(byte*) db1, length1) ||
          hash_search(&lock_db_cache,(byte*) db2, length2)))
  {
    wait_for_condition(thd, &LOCK_lock_db, &COND_refresh);
    pthread_mutex_lock(&LOCK_lock_db);
  }

  if (thd->killed)
  {
    pthread_mutex_unlock(&LOCK_lock_db);
    return 1;
  }

  lock_db_insert(db1, length1);
  lock_db_insert(db2, length2);
  creating_database++;

  /*
    Wait if a concurent thread is creating a table at the same time.
    The assumption here is that it will not take too long until
    there is a point in time when a table is not created.
  */

  while (!thd->killed && creating_table)
  {
    wait_for_condition(thd, &LOCK_lock_db, &COND_refresh);
    pthread_mutex_lock(&LOCK_lock_db);
  }

  if (thd->killed)
  {
    lock_db_delete(db1, length1);
    lock_db_delete(db2, length2);
    creating_database--;
    pthread_mutex_unlock(&LOCK_lock_db);
    pthread_cond_signal(&COND_refresh);
    return(1);
  }

  /*
    We can unlock now as the hash will protect against anyone creating a table
    in the databases we are using
  */
  pthread_mutex_unlock(&LOCK_lock_db);
  return 0;
}

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void lock_db_delete	(	const char *	name,
		uint	length
	)

Definition at line 133 of file sql_db.cc.

References hash_delete(), hash_search(), lock_db_cache, LOCK_lock_db, opt(), and safe_mutex_assert_owner.

Referenced by lock_databases(), and mysql_rename_db().

{
  my_dblock_t *opt;
  safe_mutex_assert_owner(&LOCK_lock_db);
  if ((opt= (my_dblock_t *)hash_search(&lock_db_cache,
                                       (const byte*) name, length)))
    hash_delete(&lock_db_cache, (byte*) opt);
}

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static void lock_db_free_element

(

void *

ptr

)

[static]

Definition at line 74 of file sql_db.cc.

References my_free, and MYF.

Referenced by my_database_names_init().

{
  my_free((gptr) ptr, MYF(0));
}

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static byte* lock_db_get_key	(	my_dblock_t *	ptr,
		uint *	length,
		my_bool not_used	__attribute__((unused))
	)			[static]

Definition at line 62 of file sql_db.cc.

References my_dblock_st::name, and my_dblock_st::name_length.

Referenced by my_database_names_init().

{
  *length= ptr->name_length;
  return (byte*) ptr->name;
}

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static my_bool lock_db_insert	(	const char *	dbname,
		uint	length
	)			[static]

Definition at line 92 of file sql_db.cc.

References DBUG_ENTER, DBUG_RETURN, error, hash_search(), lock_db_cache, LOCK_lock_db, my_free, my_hash_insert(), my_multi_malloc(), MY_WME, MY_ZEROFILL, MYF, NullS, opt(), safe_mutex_assert_owner, and strmov().

Referenced by lock_databases().

{
  my_dblock_t *opt;
  my_bool error= 0;
  DBUG_ENTER("lock_db_insert");
  
  safe_mutex_assert_owner(&LOCK_lock_db);

  if (!(opt= (my_dblock_t*) hash_search(&lock_db_cache,
                                        (byte*) dbname, length)))
  { 
    /* Db is not in the hash, insert it */
    char *tmp_name;
    if (!my_multi_malloc(MYF(MY_WME | MY_ZEROFILL),
                         &opt, (uint) sizeof(*opt), &tmp_name, length+1,
                         NullS))
    {
      error= 1;
      goto end;
    }
    
    opt->name= tmp_name;
    strmov(opt->name, dbname);
    opt->name_length= length;
    
    if ((error= my_hash_insert(&lock_db_cache, (byte*) opt)))
    {
      my_free((gptr) opt, MYF(0));
      goto end;
    }
  }

end:
  DBUG_RETURN(error);
}

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void my_database_names_free

(

void

)

Definition at line 234 of file sql_db.cc.

References dboptions, hash_free(), lock_db_cache, LOCK_dboptions, and rwlock_destroy.

Referenced by clean_up().

{
  if (dboptions_init)
  {
    dboptions_init= 0;
    hash_free(&dboptions);
    (void) rwlock_destroy(&LOCK_dboptions);
    hash_free(&lock_db_cache);
  }
}

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bool my_database_names_init

(

void

)

Definition at line 208 of file sql_db.cc.

References dboptions, dboptions_get_key(), error, free_dbopt(), hash_init, lock_db_cache, lock_db_free_element(), lock_db_get_key(), LOCK_dboptions, lower_case_table_names, my_charset_bin, my_rwlock_init, NULL, and system_charset_info.

Referenced by init_common_variables().

{
  bool error= 0;
  (void) my_rwlock_init(&LOCK_dboptions, NULL);
  if (!dboptions_init)
  {
    dboptions_init= 1;
    error= hash_init(&dboptions, lower_case_table_names ? 
                     &my_charset_bin : system_charset_info,
                     32, 0, 0, (hash_get_key) dboptions_get_key,
                     free_dbopt,0) ||
           hash_init(&lock_db_cache, lower_case_table_names ? 
                     &my_charset_bin : system_charset_info,
                     32, 0, 0, (hash_get_key) lock_db_get_key,
                     lock_db_free_element,0);

  }
  return error;
}

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void my_dbopt_cleanup

(

void

)

Definition at line 250 of file sql_db.cc.

References dboptions, dboptions_get_key(), free_dbopt(), hash_free(), hash_init, LOCK_dboptions, lower_case_table_names, my_charset_bin, rw_unlock, rw_wrlock, and system_charset_info.

Referenced by reload_acl_and_cache().

{
  rw_wrlock(&LOCK_dboptions);
  hash_free(&dboptions);
  hash_init(&dboptions, lower_case_table_names ? 
            &my_charset_bin : system_charset_info,
            32, 0, 0, (hash_get_key) dboptions_get_key,
            free_dbopt,0);
  rw_unlock(&LOCK_dboptions);
}

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bool mysql_alter_db	(	THD *	thd,
		const char *	db,
		HA_CREATE_INFO *	create_info
	)

Definition at line 723 of file sql_db.cc.

References build_table_filename(), DBUG_ENTER, DBUG_RETURN, st_ha_create_information::default_table_charset, error, exit, FN_REFLEN, ha_binlog_log_query, MYSQL_LOG::is_open(), LOCK_mysql_create_db, LOGCOM_ALTER_DB, mysql_bin_log, path, pthread_mutex_lock, pthread_mutex_unlock, Query_log_event::query, send_ok(), start_waiting_global_read_lock(), strcmp(), strlen(), TRUE, VOID, wait_if_global_read_lock(), MYSQL_BIN_LOG::write(), and write_db_opt().

Referenced by mysql_execute_command().

{
  char path[FN_REFLEN+16];
  long result=1;
  int error= 0;
  DBUG_ENTER("mysql_alter_db");

  /*
    Do not alter database if another thread is holding read lock.
    Wait for global read lock before acquiring LOCK_mysql_create_db.
    After wait_if_global_read_lock() we have protection against another
    global read lock. If we would acquire LOCK_mysql_create_db first,
    another thread could step in and get the global read lock before we
    reach wait_if_global_read_lock(). If this thread tries the same as we
    (admin a db), it would then go and wait on LOCK_mysql_create_db...
    Furthermore wait_if_global_read_lock() checks if the current thread
    has the global read lock and refuses the operation with
    ER_CANT_UPDATE_WITH_READLOCK if applicable.
  */
  if ((error=wait_if_global_read_lock(thd,0,1)))
    goto exit2;

  VOID(pthread_mutex_lock(&LOCK_mysql_create_db));

  /* 
     Recreate db options file: /dbpath/.db.opt
     We pass MY_DB_OPT_FILE as "extension" to avoid
     "table name to file name" encoding.
  */
  build_table_filename(path, sizeof(path), db, "", MY_DB_OPT_FILE, 0);
  if ((error=write_db_opt(thd, path, create_info)))
    goto exit;

  /*
     Change options if current database is being altered
     TODO: Delete this code
  */
  if (thd->db && !strcmp(thd->db,db))
  {
    thd->db_charset= create_info->default_table_charset ?
                     create_info->default_table_charset :
                     thd->variables.collation_server;
    thd->variables.collation_database= thd->db_charset;
  }

  ha_binlog_log_query(thd, 0, LOGCOM_ALTER_DB,
                      thd->query, thd->query_length,
                      db, "");

  if (mysql_bin_log.is_open())
  {
    Query_log_event qinfo(thd, thd->query, thd->query_length, 0,
                          /* suppress_use */ TRUE);

    /*
      Write should use the database being created as the "current
      database" and not the threads current database, which is the
      default.
    */
    qinfo.db     = db;
    qinfo.db_len = strlen(db);

    thd->clear_error();
    mysql_bin_log.write(&qinfo);
  }
  send_ok(thd, result);

exit:
  VOID(pthread_mutex_unlock(&LOCK_mysql_create_db));
  start_waiting_global_read_lock(thd);
exit2:
  DBUG_RETURN(error);
}

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bool mysql_change_db	(	THD *	thd,
		const char *	name,
		bool	no_access_check
	)

Definition at line 1298 of file sql_db.cc.

References acl_get(), check_db_dir_existence(), check_db_name(), check_grant_db(), COM_INIT_DB, DB_ACLS, DBUG_ASSERT, DBUG_ENTER, DBUG_PRINT, DBUG_RETURN, st_ha_create_information::default_table_charset, ER, ER_BAD_DB_ERROR, ER_DBACCESS_DENIED_ERROR, ER_NO_DB_ERROR, ER_WRONG_DB_NAME, FALSE, general_log_print(), grant_option, information_schema_name, LINT_INIT, load_db_opt_by_name(), my_error(), my_free, my_message(), my_strcasecmp, my_strdup(), MY_WME, MYF, NULL, SELECT_ACL, LEX_STRING::str, strlen(), system_charset_info, test_all_bits, and x_free.

Referenced by check_user(), db_create_event(), db_create_routine(), db_load_routine(), dispatch_command(), sp_head::execute(), mysql_execute_command(), mysql_rename_db(), and sp_use_new_db().

{
  int path_length, db_length;
  char *db_name;
  bool system_db= 0;
#ifndef NO_EMBEDDED_ACCESS_CHECKS
  ulong db_access;
  Security_context *sctx= thd->security_ctx;
  LINT_INIT(db_access);
#endif
  DBUG_ENTER("mysql_change_db");
  DBUG_PRINT("enter",("name: '%s'",name));

  if (name == NULL || name[0] == '\0' && no_access_check == FALSE)
  {
    my_message(ER_NO_DB_ERROR, ER(ER_NO_DB_ERROR), MYF(0));
    DBUG_RETURN(1);                             /* purecov: inspected */
  }
  else if (name[0] == '\0')
  {
    /* Called from SP to restore the original database, which was NULL */
    DBUG_ASSERT(no_access_check);
    system_db= 1;
    db_name= NULL;
    db_length= 0;
    goto end;
  }
  /*
    Now we need to make a copy because check_db_name requires a
    non-constant argument. TODO: fix check_db_name.
  */
  if ((db_name= my_strdup(name, MYF(MY_WME))) == NULL)
    DBUG_RETURN(1);                             /* the error is set */
  db_length= strlen(db_name);
  if (check_db_name(db_name))
  {
    my_error(ER_WRONG_DB_NAME, MYF(0), db_name);
    my_free(db_name, MYF(0));
    DBUG_RETURN(1);
  }
  DBUG_PRINT("info",("Use database: %s", db_name));
  if (!my_strcasecmp(system_charset_info, db_name, information_schema_name.str))
  {
    system_db= 1;
#ifndef NO_EMBEDDED_ACCESS_CHECKS
    db_access= SELECT_ACL;
#endif
    goto end;
  }

#ifndef NO_EMBEDDED_ACCESS_CHECKS
  if (!no_access_check)
  {
    if (test_all_bits(sctx->master_access, DB_ACLS))
      db_access=DB_ACLS;
    else
      db_access= (acl_get(sctx->host, sctx->ip, sctx->priv_user, db_name, 0) |
                  sctx->master_access);
    if (!(db_access & DB_ACLS) && (!grant_option ||
                                   check_grant_db(thd,db_name)))
    {
      my_error(ER_DBACCESS_DENIED_ERROR, MYF(0),
               sctx->priv_user,
               sctx->priv_host,
               db_name);
      general_log_print(thd, COM_INIT_DB, ER(ER_DBACCESS_DENIED_ERROR),
                        sctx->priv_user, sctx->priv_host, db_name);
      my_free(db_name,MYF(0));
      DBUG_RETURN(1);
    }
  }
#endif

  if (check_db_dir_existence(db_name))
  {
    my_error(ER_BAD_DB_ERROR, MYF(0), db_name);
    my_free(db_name, MYF(0));
    DBUG_RETURN(1);
  }

end:
  x_free(thd->db);
  DBUG_ASSERT(db_name == NULL || db_name[0] != '\0');
  thd->reset_db(db_name, db_length);            // THD::~THD will free this
#ifndef NO_EMBEDDED_ACCESS_CHECKS
  if (!no_access_check)
    sctx->db_access= db_access;
#endif
  if (system_db)
  {
    thd->db_charset= system_charset_info;
    thd->variables.collation_database= system_charset_info;
  }
  else
  {
    HA_CREATE_INFO create;

    load_db_opt_by_name(thd, db_name, &create);

    thd->db_charset= create.default_table_charset ?
      create.default_table_charset :
      thd->variables.collation_server;
    thd->variables.collation_database= thd->db_charset;
  }
  DBUG_RETURN(0);
}

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bool mysql_create_db	(	THD *	thd,
		char *	db,
		HA_CREATE_INFO *	create_info,
		bool	silent
	)

Definition at line 568 of file sql_db.cc.

References build_table_filename(), create_options, DBUG_ENTER, DBUG_RETURN, EE_STAT, ER, ER_CANT_CREATE_DB, ER_DB_CREATE_EXISTS, error, exit, FN_LIBCHAR, FN_REFLEN, ha_binlog_log_query, HA_LEX_CREATE_IF_NOT_EXISTS, information_schema_name, MYSQL_LOG::is_open(), LOCK_mysql_create_db, LOGCOM_CREATE_DB, my_errno, my_error(), my_mkdir(), my_stat(), MY_STAT, my_strcasecmp, MYF, mysql_bin_log, NullS, st_ha_create_information::options, path, pthread_mutex_lock, pthread_mutex_unlock, push_warning_printf(), send_ok(), start_waiting_global_read_lock(), LEX_STRING::str, strlen(), strmake(), strxmov(), system_charset_info, TRUE, VOID, wait_if_global_read_lock(), MYSQL_ERROR::WARN_LEVEL_NOTE, MYSQL_BIN_LOG::write(), and write_db_opt().

Referenced by dispatch_command(), mysql_execute_command(), and mysql_rename_db().

{
  char   path[FN_REFLEN+16];
  char   tmp_query[FN_REFLEN+16];
  long result= 1;
  int error= 0;
  MY_STAT stat_info;
  uint create_options= create_info ? create_info->options : 0;
  uint path_len;
  DBUG_ENTER("mysql_create_db");

  /* do not create 'information_schema' db */
  if (!my_strcasecmp(system_charset_info, db, information_schema_name.str))
  {
    my_error(ER_DB_CREATE_EXISTS, MYF(0), db);
    DBUG_RETURN(-1);
  }

  /*
    Do not create database if another thread is holding read lock.
    Wait for global read lock before acquiring LOCK_mysql_create_db.
    After wait_if_global_read_lock() we have protection against another
    global read lock. If we would acquire LOCK_mysql_create_db first,
    another thread could step in and get the global read lock before we
    reach wait_if_global_read_lock(). If this thread tries the same as we
    (admin a db), it would then go and wait on LOCK_mysql_create_db...
    Furthermore wait_if_global_read_lock() checks if the current thread
    has the global read lock and refuses the operation with
    ER_CANT_UPDATE_WITH_READLOCK if applicable.
  */
  if (wait_if_global_read_lock(thd, 0, 1))
  {
    error= -1;
    goto exit2;
  }

  VOID(pthread_mutex_lock(&LOCK_mysql_create_db));

  /* Check directory */
  path_len= build_table_filename(path, sizeof(path), db, "", "", 0);
  path[path_len-1]= 0;                    // Remove last '/' from path

  if (my_stat(path,&stat_info,MYF(0)))
  {
    if (!(create_options & HA_LEX_CREATE_IF_NOT_EXISTS))
    {
      my_error(ER_DB_CREATE_EXISTS, MYF(0), db);
      error= -1;
      goto exit;
    }
    push_warning_printf(thd, MYSQL_ERROR::WARN_LEVEL_NOTE,
                        ER_DB_CREATE_EXISTS, ER(ER_DB_CREATE_EXISTS), db);
    if (!silent)
      send_ok(thd);
    error= 0;
    goto exit;
  }
  else
  {
    if (my_errno != ENOENT)
    {
      my_error(EE_STAT, MYF(0), path, my_errno);
      goto exit;
    }
    if (my_mkdir(path,0777,MYF(0)) < 0)
    {
      my_error(ER_CANT_CREATE_DB, MYF(0), db, my_errno);
      error= -1;
      goto exit;
    }
  }

  path[path_len-1]= FN_LIBCHAR;
  strmake(path+path_len, MY_DB_OPT_FILE, sizeof(path)-path_len-1);
  if (write_db_opt(thd, path, create_info))
  {
    /*
      Could not create options file.
      Restore things to beginning.
    */
    path[path_len]= 0;
    if (rmdir(path) >= 0)
    {
      error= -1;
      goto exit;
    }
    /*
      We come here when we managed to create the database, but not the option
      file.  In this case it's best to just continue as if nothing has
      happened.  (This is a very unlikely senario)
    */
  }
  
  if (!silent)
  {
    char *query;
    uint query_length;

    if (!thd->query)                            // Only in replication
    {
      query=         tmp_query;
      query_length= (uint) (strxmov(tmp_query,"create database `",
                                    db, "`", NullS) - tmp_query);
    }
    else
    {
      query=        thd->query;
      query_length= thd->query_length;
    }

    ha_binlog_log_query(thd, 0, LOGCOM_CREATE_DB,
                        query, query_length,
                        db, "");

    if (mysql_bin_log.is_open())
    {
      Query_log_event qinfo(thd, query, query_length, 0, 
                            /* suppress_use */ TRUE);

      /*
        Write should use the database being created as the "current
        database" and not the threads current database, which is the
        default. If we do not change the "current database" to the
        database being created, the CREATE statement will not be
        replicated when using --binlog-do-db to select databases to be
        replicated. 

        An example (--binlog-do-db=sisyfos):
       
          CREATE DATABASE bob;        # Not replicated
          USE bob;                    # 'bob' is the current database
          CREATE DATABASE sisyfos;    # Not replicated since 'bob' is
                                      # current database.
          USE sisyfos;                # Will give error on slave since
                                      # database does not exist.
      */
      qinfo.db     = db;
      qinfo.db_len = strlen(db);

      mysql_bin_log.write(&qinfo);
    }
    send_ok(thd, result);
  }

exit:
  VOID(pthread_mutex_unlock(&LOCK_mysql_create_db));
  start_waiting_global_read_lock(thd);
exit2:
  DBUG_RETURN(error);
}

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bool mysql_rename_db	(	THD *	thd,
		LEX_STRING *	old_db,
		LEX_STRING *	new_db
	)

Definition at line 1494 of file sql_db.cc.

References build_table_filename(), COND_refresh, creating_database, DBUG_ENTER, DBUG_PRINT, DBUG_RETURN, st_ha_create_information::default_table_charset, st_my_dir::dir_entry, ER_BAD_DB_ERROR, error, exit, F_OK, filename_to_tablename(), files_charset_info, FN_LIBCHAR, FN_REFLEN, fn_rext(), MYSQL_LOG::is_open(), LEX_STRING::length, load_db_opt(), lock_databases(), lock_db_delete(), LOCK_lock_db, my_access, my_delete(), my_dir(), my_dirend(), MY_DONT_SORT, my_error(), my_rename(), my_strcasecmp, MY_WME, MYF, mysql_bin_log, mysql_change_db(), mysql_create_db(), mysql_rename_tables(), mysql_rm_db(), charset_info_st::name, NULL, st_my_dir::number_off_files, path, pthread_mutex_lock, pthread_mutex_unlock, Query_log_event::query, reg_ext, sql_memdup(), LEX_STRING::str, strcmp(), TL_IGNORE, TL_OPTION_UPDATING, TRUE, and MYSQL_BIN_LOG::write().

Referenced by mysql_execute_command().

{
  int error= 0, change_to_newdb= 0;
  char path[FN_REFLEN+16];
  uint length;
  HA_CREATE_INFO create_info;
  MY_DIR *dirp;
  TABLE_LIST *table_list;
  SELECT_LEX *sl= thd->lex->current_select;
  DBUG_ENTER("mysql_rename_db");

  if (lock_databases(thd, old_db->str, old_db->length,
                          new_db->str, new_db->length))
    return 1;

  /*
    Let's remember if we should do "USE newdb" afterwards.
    thd->db will be cleared in mysql_rename_db()
  */
  if (thd->db && !strcmp(thd->db, old_db->str))
    change_to_newdb= 1;

  build_table_filename(path, sizeof(path)-1,
                       old_db->str, "", MY_DB_OPT_FILE, 0);
  if ((load_db_opt(thd, path, &create_info)))
    create_info.default_table_charset= thd->variables.collation_server;

  length= build_table_filename(path, sizeof(path)-1, old_db->str, "", "", 0);
  if (length && path[length-1] == FN_LIBCHAR)
    path[length-1]=0;                            // remove ending '\'
  if ((error= my_access(path,F_OK)))
  {
    my_error(ER_BAD_DB_ERROR, MYF(0), old_db->str);
    goto exit;
  }

  /* Step1: Create the new database */
  if ((error= mysql_create_db(thd, new_db->str, &create_info, 1)))
    goto exit;

  /* Step2: Move tables to the new database */
  if ((dirp = my_dir(path,MYF(MY_DONT_SORT))))
  {
    uint nfiles= (uint) dirp->number_off_files;
    for (uint idx=0 ; idx < nfiles && !thd->killed ; idx++)
    {
      FILEINFO *file= dirp->dir_entry + idx;
      char *extension, tname[FN_REFLEN];
      LEX_STRING table_str;
      DBUG_PRINT("info",("Examining: %s", file->name));

      /* skiping non-FRM files */
      if (my_strcasecmp(files_charset_info,
                        (extension= fn_rext(file->name)), reg_ext))
        continue;

      /* A frm file found, add the table info rename list */
      *extension= '\0';
      
      table_str.length= filename_to_tablename(file->name,
                                              tname, sizeof(tname)-1);
      table_str.str= sql_memdup(tname, table_str.length + 1);
      Table_ident *old_ident= new Table_ident(thd, *old_db, table_str, 0);
      Table_ident *new_ident= new Table_ident(thd, *new_db, table_str, 0);
      if (!old_ident || !new_ident ||
          !sl->add_table_to_list(thd, old_ident, NULL,
                                 TL_OPTION_UPDATING, TL_IGNORE) ||
          !sl->add_table_to_list(thd, new_ident, NULL,
                                 TL_OPTION_UPDATING, TL_IGNORE))
      {
        error= 1;
        my_dirend(dirp);
        goto exit;
      }
    }
    my_dirend(dirp);  
  }

  if ((table_list= thd->lex->query_tables) &&
      (error= mysql_rename_tables(thd, table_list, 1)))
  {
    /*
      Failed to move all tables from the old database to the new one.
      In the best case mysql_rename_tables() moved all tables back to the old
      database. In the worst case mysql_rename_tables() moved some tables
      to the new database, then failed, then started to move the tables back,  and
      then failed again. In this situation we have some tables in the
      old database and some tables in the new database.
      Let's delete the option file, and then the new database directory.
      If some tables were left in the new directory, rmdir() will fail.
      It garantees we never loose any tables.
    */
    build_table_filename(path, sizeof(path)-1,
                         new_db->str,"",MY_DB_OPT_FILE, 0);
    my_delete(path, MYF(MY_WME));
    length= build_table_filename(path, sizeof(path)-1, new_db->str, "", "", 0);
    if (length && path[length-1] == FN_LIBCHAR)
      path[length-1]=0;                            // remove ending '\'
    rmdir(path);
    goto exit;
  }


  /*
    Step3: move all remaining files to the new db's directory.
    Skip db opt file: it's been created by mysql_create_db() in
    the new directory, and will be dropped by mysql_rm_db() in the old one.
    Trigger TRN and TRG files are be moved as regular files at the moment,
    without any special treatment.

    Triggers without explicit database qualifiers in table names work fine: 
      use d1;
      create trigger trg1 before insert on t2 for each row set @a:=1
      rename database d1 to d2;

    TODO: Triggers, having the renamed database explicitely written
    in the table qualifiers.
    1. when the same database is renamed:
        create trigger d1.trg1 before insert on d1.t1 for each row set @a:=1;
        rename database d1 to d2;
      Problem: After database renaming, the trigger's body
               still points to the old database d1.
    2. when another database is renamed:
        create trigger d3.trg1 before insert on d3.t1 for each row
          insert into d1.t1 values (...);
        rename database d1 to d2;
      Problem: After renaming d1 to d2, the trigger's body
               in the database d3 still points to database d1.
  */

  if ((dirp = my_dir(path,MYF(MY_DONT_SORT))))
  {
    uint nfiles= (uint) dirp->number_off_files;
    for (uint idx=0 ; idx < nfiles ; idx++)
    {
      FILEINFO *file= dirp->dir_entry + idx;
      char oldname[FN_REFLEN], newname[FN_REFLEN];
      DBUG_PRINT("info",("Examining: %s", file->name));

      /* skiping . and .. and MY_DB_OPT_FILE */
      if ((file->name[0] == '.' &&
           (!file->name[1] || (file->name[1] == '.' && !file->name[2]))) ||
          !my_strcasecmp(files_charset_info, file->name, MY_DB_OPT_FILE))
        continue;

      /* pass empty file name, and file->name as extension to avoid encoding */
      build_table_filename(oldname, sizeof(oldname)-1,
                           old_db->str, "", file->name, 0);
      build_table_filename(newname, sizeof(newname)-1,
                           new_db->str, "", file->name, 0);
      my_rename(oldname, newname, MYF(MY_WME));
    }
    my_dirend(dirp);  
  }

  /*
    Step4: TODO: moving stored procedures in the 'proc' system table
    We need a new function: sp_move_db_routines(thd, olddb, newdb)
    Which will basically have the same effect with:
    UPDATE proc SET db='newdb' WHERE db='olddb'
    Note, for 5.0 to 5.1 upgrade purposes we don't really need it.

    The biggest problem here is that we can't have a lock on LOCK_open() while
    calling open_table() for 'proc'.

    Two solutions:
    - Start by opening the 'event' and 'proc' (and other) tables for write
      even before creating the 'to' database.  (This will have the nice
      effect of blocking another 'rename database' while the lock is active).
    - Use the solution "Disable create of new tables during lock table"

    For an example of how to read through all rows, see:
    sql_help.cc::search_topics()
  */

  /*
    Step5: TODO: moving events in the 'event' system table
    We need a new function evex_move_db_events(thd, olddb, newdb)
    Which will have the same effect with:
    UPDATE event SET db='newdb' WHERE db='olddb'
    Note, for 5.0 to 5.1 upgrade purposes we don't really need it.
  */

  /*
    Step6: TODO: moving grants in the 'db', 'tables_priv', 'columns_priv'.
    Update each grant table, doing the same with:
    UPDATE system_table SET db='newdb' WHERE db='olddb'
  */

  /*
    Step7: drop the old database.
    remove_db_from_cache(olddb) and query_cache_invalidate(olddb)
    are done inside mysql_rm_db(), no needs to execute them again.
    mysql_rm_db() also "unuses" if we drop the current database.
  */
  error= mysql_rm_db(thd, old_db->str, 0, 1);

  /* Step8: logging */
  if (mysql_bin_log.is_open())
  {
    Query_log_event qinfo(thd, thd->query, thd->query_length, 0, TRUE);
    thd->clear_error();
    mysql_bin_log.write(&qinfo);
  }

  /* Step9: Let's do "use newdb" if we renamed the current database */
  if (change_to_newdb)
    error|= mysql_change_db(thd, new_db->str, 0);

exit:
  pthread_mutex_lock(&LOCK_lock_db);
  /* Remove the databases from db lock cache */
  lock_db_delete(old_db->str, old_db->length);
  lock_db_delete(new_db->str, new_db->length);
  creating_database--;
  /* Signal waiting CREATE TABLE's to continue */
  pthread_cond_signal(&COND_refresh);
  pthread_mutex_unlock(&LOCK_lock_db);

  DBUG_RETURN(error);
}

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static long mysql_rm_arc_files	(	THD *	thd,
		MY_DIR *	dirp,
		const char *	org_path
	)			[static]

Definition at line 1191 of file sql_db.cc.

References DBUG_ENTER, DBUG_PRINT, DBUG_RETURN, st_my_dir::dir_entry, err, fn_ext(), FN_REFLEN, my_delete_with_symlink(), my_dirend(), my_isdigit, MY_WME, MYF, fileinfo::name, NullS, st_my_dir::number_off_files, rm_dir_w_symlink(), strxmov(), and system_charset_info.

Referenced by mysql_rm_known_files().

{
  long deleted= 0;
  ulong found_other_files= 0;
  char filePath[FN_REFLEN];
  DBUG_ENTER("mysql_rm_arc_files");
  DBUG_PRINT("enter", ("path: %s", org_path));

  for (uint idx=0 ;
       idx < (uint) dirp->number_off_files && !thd->killed ;
       idx++)
  {
    FILEINFO *file=dirp->dir_entry+idx;
    char *extension, *revision;
    DBUG_PRINT("info",("Examining: %s", file->name));

    /* skiping . and .. */
    if (file->name[0] == '.' && (!file->name[1] ||
       (file->name[1] == '.' &&  !file->name[2])))
      continue;

    extension= fn_ext(file->name);
    if (extension[0] != '.' ||
        extension[1] != 'f' || extension[2] != 'r' ||
        extension[3] != 'm' || extension[4] != '-')
    {
      found_other_files++;
      continue;
    }
    revision= extension+5;
    while (*revision && my_isdigit(system_charset_info, *revision))
      revision++;
    if (*revision)
    {
      found_other_files++;
      continue;
    }
    strxmov(filePath, org_path, "/", file->name, NullS);
    if (my_delete_with_symlink(filePath,MYF(MY_WME)))
    {
      goto err;
    }
  }
  if (thd->killed)
    goto err;

  my_dirend(dirp);

  /*
    If the directory is a symbolic link, remove the link first, then
    remove the directory the symbolic link pointed at
  */
  if (!found_other_files &&
      rm_dir_w_symlink(org_path, 0))
    DBUG_RETURN(-1);
  DBUG_RETURN(deleted);

err:
  my_dirend(dirp);
  DBUG_RETURN(-1);
}

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bool mysql_rm_db	(	THD *	thd,
		char *	db,
		bool	if_exists,
		bool	silent
	)

Definition at line 815 of file sql_db.cc.

References build_table_filename(), DBUG_ENTER, DBUG_RETURN, del_dbopt(), Events::drop_schema_events(), ER, ER_DB_DROP_EXISTS, error, exit, FN_REFLEN, ha_drop_database(), MYSQL_LOG::is_open(), LOCK_mysql_create_db, LOCK_open, MAX_DROP_TABLE_Q_LEN, my_dir(), MY_DONT_SORT, my_error(), MYF, mysql_bin_log, mysql_rm_known_files(), st_table_list::next_local, NULL, NullS, path, pthread_mutex_lock, pthread_mutex_unlock, push_warning_printf(), remove_db_from_cache(), send_ok(), SERVER_STATUS_DB_DROPPED, sp_drop_db_routines(), start_waiting_global_read_lock(), strcmp(), strlen(), strmov(), strxmov(), st_table_list::table_name, TRUE, VOID, wait_if_global_read_lock(), MYSQL_ERROR::WARN_LEVEL_NOTE, MYSQL_BIN_LOG::write(), and write_to_binlog().

Referenced by dispatch_command(), mysql_execute_command(), and mysql_rename_db().

{
  long deleted=0;
  int error= 0;
  char  path[FN_REFLEN+16];
  MY_DIR *dirp;
  uint length;
  TABLE_LIST* dropped_tables= 0;
  DBUG_ENTER("mysql_rm_db");

  /*
    Do not drop database if another thread is holding read lock.
    Wait for global read lock before acquiring LOCK_mysql_create_db.
    After wait_if_global_read_lock() we have protection against another
    global read lock. If we would acquire LOCK_mysql_create_db first,
    another thread could step in and get the global read lock before we
    reach wait_if_global_read_lock(). If this thread tries the same as we
    (admin a db), it would then go and wait on LOCK_mysql_create_db...
    Furthermore wait_if_global_read_lock() checks if the current thread
    has the global read lock and refuses the operation with
    ER_CANT_UPDATE_WITH_READLOCK if applicable.
  */
  if (wait_if_global_read_lock(thd, 0, 1))
  {
    error= -1;
    goto exit2;
  }

  VOID(pthread_mutex_lock(&LOCK_mysql_create_db));

  length= build_table_filename(path, sizeof(path), db, "", "", 0);
  strmov(path+length, MY_DB_OPT_FILE);          // Append db option file name
  del_dbopt(path);                              // Remove dboption hash entry
  path[length]= '\0';                           // Remove file name

  /* See if the directory exists */
  if (!(dirp= my_dir(path,MYF(MY_DONT_SORT))))
  {
    if (!if_exists)
    {
      error= -1;
      my_error(ER_DB_DROP_EXISTS, MYF(0), db);
      goto exit;
    }
    else
      push_warning_printf(thd, MYSQL_ERROR::WARN_LEVEL_NOTE,
                          ER_DB_DROP_EXISTS, ER(ER_DB_DROP_EXISTS), db);
  }
  else
  {
    pthread_mutex_lock(&LOCK_open);
    remove_db_from_cache(db);
    pthread_mutex_unlock(&LOCK_open);

    
    error= -1;
    if ((deleted= mysql_rm_known_files(thd, dirp, db, path, 0,
                                       &dropped_tables)) >= 0)
    {
      ha_drop_database(path);
      query_cache_invalidate1(db);
      error = 0;
    }
  }
  if (!silent && deleted>=0)
  {
    const char *query;
    ulong query_length;
    if (!thd->query)
    {
      /* The client used the old obsolete mysql_drop_db() call */
      query= path;
      query_length= (uint) (strxmov(path, "drop database `", db, "`",
                                     NullS) - path);
    }
    else
    {
      query =thd->query;
      query_length= thd->query_length;
    }
    if (mysql_bin_log.is_open())
    {
      Query_log_event qinfo(thd, query, query_length, 0, 
                            /* suppress_use */ TRUE);
      /*
        Write should use the database being created as the "current
        database" and not the threads current database, which is the
        default.
      */
      qinfo.db     = db;
      qinfo.db_len = strlen(db);

      thd->clear_error();
      mysql_bin_log.write(&qinfo);
    }
    thd->server_status|= SERVER_STATUS_DB_DROPPED;
    send_ok(thd, (ulong) deleted);
    thd->server_status&= ~SERVER_STATUS_DB_DROPPED;
  }
  else if (mysql_bin_log.is_open())
  {
    char *query, *query_pos, *query_end, *query_data_start;
    TABLE_LIST *tbl;
    uint db_len;

    if (!(query= thd->alloc(MAX_DROP_TABLE_Q_LEN)))
      goto exit; /* not much else we can do */
    query_pos= query_data_start= strmov(query,"drop table ");
    query_end= query + MAX_DROP_TABLE_Q_LEN;
    db_len= strlen(db);

    for (tbl= dropped_tables; tbl; tbl= tbl->next_local)
    {
      uint tbl_name_len;

      /* 3 for the quotes and the comma*/
      tbl_name_len= strlen(tbl->table_name) + 3;
      if (query_pos + tbl_name_len + 1 >= query_end)
      {
        write_to_binlog(thd, query, query_pos -1 - query, db, db_len);
        query_pos= query_data_start;
      }

      *query_pos++ = '`';
      query_pos= strmov(query_pos,tbl->table_name);
      *query_pos++ = '`';
      *query_pos++ = ',';
    }

    if (query_pos != query_data_start)
    {
      write_to_binlog(thd, query, query_pos -1 - query, db, db_len);
    }
  }

exit:
  (void)sp_drop_db_routines(thd, db); /* QQ Ignore errors for now  */
  error= Events::drop_schema_events(thd, db);
  /*
    If this database was the client's selected database, we silently
    change the client's selected database to nothing (to have an empty
    SELECT DATABASE() in the future). For this we free() thd->db and set
    it to 0.
  */
  if (thd->db && !strcmp(thd->db, db))
    thd->set_db(NULL, 0);
  VOID(pthread_mutex_unlock(&LOCK_mysql_create_db));
  start_waiting_global_read_lock(thd);
exit2:
  DBUG_RETURN(error);
}

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static long mysql_rm_known_files	(	THD *	thd,
		MY_DIR *	dirp,
		const char *	db,
		const char *	path,
		uint	level,
		TABLE_LIST **	dropped_tables
	)			[static]

Definition at line 973 of file sql_db.cc.

References String::c_ptr(), DBUG_ENTER, DBUG_PRINT, DBUG_RETURN, deletable_extentions, st_my_dir::dir_entry, ER_DB_DROP_RMDIR, err, filename_to_tablename(), files_charset_info, find_type(), FN_REFLEN, ha_known_exts(), my_charset_bin, my_delete_with_symlink(), my_dir(), my_dirend(), MY_DONT_SORT, my_error(), my_isdigit, my_strcasecmp, MY_WME, MYF, mysql_rm_arc_files(), mysql_rm_table_part2_with_lock(), fileinfo::name, NullS, st_my_dir::number_off_files, List< T >::push_back(), reg_ext, rm_dir_w_symlink(), strend(), strlen(), strmov(), strrchr(), strxmov(), system_charset_info, unpack_filename(), and VOID.

Referenced by mysql_rm_db().

{
  long deleted=0;
  ulong found_other_files=0;
  char filePath[FN_REFLEN];
  TABLE_LIST *tot_list=0, **tot_list_next;
  List<String> raid_dirs;
  DBUG_ENTER("mysql_rm_known_files");
  DBUG_PRINT("enter",("path: %s", org_path));

  tot_list_next= &tot_list;

  for (uint idx=0 ;
       idx < (uint) dirp->number_off_files && !thd->killed ;
       idx++)
  {
    FILEINFO *file=dirp->dir_entry+idx;
    char *extension;
    DBUG_PRINT("info",("Examining: %s", file->name));

    /* skiping . and .. */
    if (file->name[0] == '.' && (!file->name[1] ||
       (file->name[1] == '.' &&  !file->name[2])))
      continue;

    /* Check if file is a raid directory */
    if ((my_isdigit(system_charset_info, file->name[0]) ||
         (file->name[0] >= 'a' && file->name[0] <= 'f')) &&
        (my_isdigit(system_charset_info, file->name[1]) ||
         (file->name[1] >= 'a' && file->name[1] <= 'f')) &&
        !file->name[2] && !level)
    {
      char newpath[FN_REFLEN], *copy_of_path;
      MY_DIR *new_dirp;
      String *dir;
      uint length;

      strxmov(newpath,org_path,"/",file->name,NullS);
      length= unpack_filename(newpath,newpath);
      if ((new_dirp = my_dir(newpath,MYF(MY_DONT_SORT))))
      {
        DBUG_PRINT("my",("New subdir found: %s", newpath));
        if ((mysql_rm_known_files(thd, new_dirp, NullS, newpath,1,0)) < 0)
          goto err;
        if (!(copy_of_path= thd->memdup(newpath, length+1)) ||
            !(dir= new (thd->mem_root) String(copy_of_path, length,
                                               &my_charset_bin)) ||
            raid_dirs.push_back(dir))
          goto err;
        continue;
      }
      found_other_files++;
      continue;
    }
    else if (file->name[0] == 'a' && file->name[1] == 'r' &&
             file->name[2] == 'c' && file->name[3] == '\0')
    {
      /* .frm archive */
      char newpath[FN_REFLEN];
      MY_DIR *new_dirp;
      strxmov(newpath, org_path, "/", "arc", NullS);
      (void) unpack_filename(newpath, newpath);
      if ((new_dirp = my_dir(newpath, MYF(MY_DONT_SORT))))
      {
        DBUG_PRINT("my",("Archive subdir found: %s", newpath));
        if ((mysql_rm_arc_files(thd, new_dirp, newpath)) < 0)
          goto err;
        continue;
      }
      found_other_files++;
      continue;
    }
    if (!(extension= strrchr(file->name, '.')))
      extension= strend(file->name);
    if (find_type(extension, &deletable_extentions,1+2) <= 0)
    {
      if (find_type(extension, ha_known_exts(),1+2) <= 0)
        found_other_files++;
      continue;
    }
    /* just for safety we use files_charset_info */
    if (db && !my_strcasecmp(files_charset_info,
                             extension, reg_ext))
    {
      /* Drop the table nicely */
      *extension= 0;                    // Remove extension
      TABLE_LIST *table_list=(TABLE_LIST*)
        thd->calloc(sizeof(*table_list)+ strlen(db)+strlen(file->name)+2);
      if (!table_list)
        goto err;
      table_list->db= (char*) (table_list+1);
      table_list->table_name= strmov(table_list->db, db) + 1;
      VOID(filename_to_tablename(file->name, table_list->table_name,
                                 strlen(file->name) + 1));
      table_list->alias= table_list->table_name;        // If lower_case_table_names=2
      /* Link into list */
      (*tot_list_next)= table_list;
      tot_list_next= &table_list->next_local;
      deleted++;
    }
    else
    {
      strxmov(filePath, org_path, "/", file->name, NullS);
      if (my_delete_with_symlink(filePath,MYF(MY_WME)))
      {
        goto err;
      }
    }
  }
  if (thd->killed ||
      (tot_list && mysql_rm_table_part2_with_lock(thd, tot_list, 1, 0, 1)))
    goto err;

  /* Remove RAID directories */
  {
    List_iterator<String> it(raid_dirs);
    String *dir;
    while ((dir= it++))
      if (rmdir(dir->c_ptr()) < 0)
        found_other_files++;
  }
  my_dirend(dirp);  
  
  if (dropped_tables)
    *dropped_tables= tot_list;
  
  /*
    If the directory is a symbolic link, remove the link first, then
    remove the directory the symbolic link pointed at
  */
  if (found_other_files)
  {
    my_error(ER_DB_DROP_RMDIR, MYF(0), org_path, EEXIST);
    DBUG_RETURN(-1);
  }
  else
  {
    /* Don't give errors if we can't delete 'RAID' directory */
    if (rm_dir_w_symlink(org_path, level == 0))
      DBUG_RETURN(-1);
  }

  DBUG_RETURN(deleted);

err:
  my_dirend(dirp);
  DBUG_RETURN(-1);
}

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static my_bool put_dbopt	(	const char *	dbname,
		HA_CREATE_INFO *	create
	)			[static]

Definition at line 305 of file sql_db.cc.

References dboptions, DBUG_ENTER, DBUG_RETURN, st_ha_create_information::default_table_charset, error, hash_search(), LOCK_dboptions, my_free, my_hash_insert(), my_multi_malloc(), MY_WME, MY_ZEROFILL, MYF, NullS, opt(), rw_unlock, rw_wrlock, strlen(), and strmov().

Referenced by load_db_opt(), and write_db_opt().

{
  my_dbopt_t *opt;
  uint length;
  my_bool error= 0;
  DBUG_ENTER("put_dbopt");

  length= (uint) strlen(dbname);
  
  rw_wrlock(&LOCK_dboptions);
  if (!(opt= (my_dbopt_t*) hash_search(&dboptions, (byte*) dbname, length)))
  { 
    /* Options are not in the hash, insert them */
    char *tmp_name;
    if (!my_multi_malloc(MYF(MY_WME | MY_ZEROFILL),
                         &opt, (uint) sizeof(*opt), &tmp_name, length+1,
                         NullS))
    {
      error= 1;
      goto end;
    }
    
    opt->name= tmp_name;
    strmov(opt->name, dbname);
    opt->name_length= length;
    
    if ((error= my_hash_insert(&dboptions, (byte*) opt)))
    {
      my_free((gptr) opt, MYF(0));
      goto end;
    }
  }

  /* Update / write options in hash */
  opt->charset= create->default_table_charset;

end:
  rw_unlock(&LOCK_dboptions);  
  DBUG_RETURN(error);
}

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static my_bool rm_dir_w_symlink	(	const char *	org_path,
		my_bool	send_error
	)			[static]

Definition at line 1137 of file sql_db.cc.

References DBUG_ENTER, DBUG_RETURN, ER_DB_DROP_RMDIR, errno, error, FN_LIBCHAR, FN_REFLEN, my_delete(), my_error(), my_readlink(), MY_WME, MYF, path, pos(), strend(), and unpack_filename().

Referenced by mysql_rm_arc_files(), and mysql_rm_known_files().

{
  char tmp_path[FN_REFLEN], *pos;
  char *path= tmp_path;
  DBUG_ENTER("rm_dir_w_symlink");
  unpack_filename(tmp_path, org_path);
#ifdef HAVE_READLINK
  int error;
  char tmp2_path[FN_REFLEN];

  /* Remove end FN_LIBCHAR as this causes problem on Linux in readlink */
  pos= strend(path);
  if (pos > path && pos[-1] == FN_LIBCHAR)
    *--pos=0;

  if ((error= my_readlink(tmp2_path, path, MYF(MY_WME))) < 0)
    DBUG_RETURN(1);
  if (!error)
  {
    if (my_delete(path, MYF(send_error ? MY_WME : 0)))
    {
      DBUG_RETURN(send_error);
    }
    /* Delete directory symbolic link pointed at */
    path= tmp2_path;
  }
#endif
  /* Remove last FN_LIBCHAR to not cause a problem on OS/2 */
  pos= strend(path);

  if (pos > path && pos[-1] == FN_LIBCHAR)
    *--pos=0;
  if (rmdir(path) < 0 && send_error)
  {
    my_error(ER_DB_DROP_RMDIR, MYF(0), path, errno);
    DBUG_RETURN(1);
  }
  DBUG_RETURN(0);
}

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static bool write_db_opt	(	THD *	thd,
		const char *	path,
		HA_CREATE_INFO *	create
	)			[static]

Definition at line 373 of file sql_db.cc.

References buf, CREATE_MODE, charset_info_st::csname, st_ha_create_information::default_table_charset, error, my_close(), my_create(), MY_NABP, MY_WME, my_write, MYF, charset_info_st::name, NullS, put_dbopt(), and strxnmov().

Referenced by mysql_alter_db(), and mysql_create_db().

{
  register File file;
  char buf[256]; // Should be enough for one option
  bool error=1;

  if (!create->default_table_charset)
    create->default_table_charset= thd->variables.collation_server;

  if (put_dbopt(path, create))
    return 1;

  if ((file=my_create(path, CREATE_MODE,O_RDWR | O_TRUNC,MYF(MY_WME))) >= 0)
  {
    ulong length;
    length= (ulong) (strxnmov(buf, sizeof(buf)-1, "default-character-set=",
                              create->default_table_charset->csname,
                              "\ndefault-collation=",
                              create->default_table_charset->name,
                              "\n", NullS) - buf);

    /* Error is written by my_write */
    if (!my_write(file,(byte*) buf, length, MYF(MY_NABP+MY_WME)))
      error=0;
    my_close(file,MYF(0));
  }
  return error;
}

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static void write_to_binlog	(	THD *	thd,
		char *	query,
		uint	q_len,
		char *	db,
		uint	db_len
	)			[inline, static]

Definition at line 173 of file sql_db.cc.

References Query_log_event::db, Query_log_event::db_len, Query_log_event::error_code, mysql_bin_log, and MYSQL_BIN_LOG::write().

Referenced by mysql_execute_command(), and mysql_rm_db().

{
  Query_log_event qinfo(thd, query, q_len, 0, 0);
  qinfo.error_code= 0;
  qinfo.db= db;
  qinfo.db_len= db_len;
  mysql_bin_log.write(&qinfo);
}  

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---

Variable Documentation

int creating_database = 0

Definition at line 47 of file sql_db.cc.

Referenced by lock_databases(), mysql_create_table(), and mysql_rename_db().

HASH dboptions [static]

Definition at line 144 of file sql_db.cc.

Referenced by del_dbopt(), get_dbopt(), my_database_names_free(), my_database_names_init(), my_dbopt_cleanup(), and put_dbopt().

my_bool dboptions_init = 0 [static]

Definition at line 145 of file sql_db.cc.

const char* del_exts[] = {".frm", ".BAK", ".TMD",".opt", NullS}

Definition at line 32 of file sql_db.cc.

TYPELIB deletable_extentions [static]

Initial value:

{array_elements(del_exts)-1,"del_exts", del_exts, NULL}

Definition at line 33 of file sql_db.cc.

Referenced by mysql_rm_known_files().

HASH lock_db_cache

Definition at line 45 of file sql_db.cc.

Referenced by lock_databases(), lock_db_delete(), lock_db_insert(), my_database_names_free(), my_database_names_init(), and mysql_create_table().

rw_lock_t LOCK_dboptions [static]

Definition at line 146 of file sql_db.cc.

Referenced by del_dbopt(), get_dbopt(), my_database_names_free(), my_database_names_init(), my_dbopt_cleanup(), and put_dbopt().

pthread_mutex_t LOCK_lock_db

Definition at line 46 of file sql_db.cc.

Referenced by clean_up_mutexes(), init_thread_environment(), lock_databases(), lock_db_delete(), lock_db_insert(), mysql_create_table(), and mysql_rename_db().

---

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