-consistently use struct GNUNET_HashCode
[oweals/gnunet.git] / src / datastore / plugin_datastore_mysql.c
index 3d0da61a0cc016317c93099cb2c76b5c5ff3f838..b92877d9809e7eb7a1e9c6a78b56d1ac2b8c0305 100644 (file)
 #include "platform.h"
 #include "gnunet_datastore_plugin.h"
 #include "gnunet_util_lib.h"
-#include <mysql/mysql.h>
+#include "gnunet_mysql_lib.h"
 
-#define DEBUG_MYSQL GNUNET_NO
 
 #define MAX_DATUM_SIZE 65536
 
-/**
- * Maximum number of supported parameters for a prepared
- * statement.  Increase if needed.
- */
-#define MAX_PARAM 16
-
-/**
- * Die with an error message that indicates
- * a failure of the command 'cmd' with the message given
- * by strerror(errno).
- */
-#define DIE_MYSQL(cmd, dbh) do { GNUNET_log(GNUNET_ERROR_TYPE_ERROR, _("`%s' failed at %s:%d with error: %s\n"), cmd, __FILE__, __LINE__, mysql_error((dbh)->dbf)); abort(); } while(0);
-
-/**
- * Log an error message at log-level 'level' that indicates
- * a failure of the command 'cmd' on file 'filename'
- * with the message given by strerror(errno).
- */
-#define LOG_MYSQL(level, cmd, dbh) do { GNUNET_log(level, _("`%s' failed at %s:%d with error: %s\n"), cmd, __FILE__, __LINE__, mysql_error((dbh)->dbf)); } while(0);
-
-
-struct GNUNET_MysqlStatementHandle
-{
-  struct GNUNET_MysqlStatementHandle *next;
-
-  struct GNUNET_MysqlStatementHandle *prev;
-
-  char *query;
-
-  MYSQL_STMT *statement;
-
-  int valid;
-
-};
-
 
 /**
  * Context for all functions in this plugin.
  */
-struct Plugin 
+struct Plugin
 {
   /**
    * Our execution environment.
@@ -174,64 +138,49 @@ struct Plugin
   /**
    * Handle to talk to MySQL.
    */
-  MYSQL *dbf;
-  
-  /**
-   * We keep all prepared statements in a DLL.  This is the head.
-   */
-  struct GNUNET_MysqlStatementHandle *shead;
-
-  /**
-   * We keep all prepared statements in a DLL.  This is the tail.
-   */
-  struct GNUNET_MysqlStatementHandle *stail;
-
-  /**
-   * Filename of "my.cnf" (msyql configuration).
-   */
-  char *cnffile;
+  struct GNUNET_MYSQL_Context *mc;
 
   /**
    * Prepared statements.
    */
 #define INSERT_ENTRY "INSERT INTO gn090 (repl,type,prio,anonLevel,expire,rvalue,hash,vhash,value) VALUES (?,?,?,?,?,?,?,?,?)"
-  struct GNUNET_MysqlStatementHandle *insert_entry;
-  
+  struct GNUNET_MYSQL_StatementHandle *insert_entry;
+
 #define DELETE_ENTRY_BY_UID "DELETE FROM gn090 WHERE uid=?"
-  struct GNUNET_MysqlStatementHandle *delete_entry_by_uid;
+  struct GNUNET_MYSQL_StatementHandle *delete_entry_by_uid;
 
 #define COUNT_ENTRY_BY_HASH "SELECT count(*) FROM gn090 FORCE INDEX (idx_hash) WHERE hash=?"
-  struct GNUNET_MysqlStatementHandle *count_entry_by_hash;
-  
+  struct GNUNET_MYSQL_StatementHandle *count_entry_by_hash;
+
 #define SELECT_ENTRY_BY_HASH "SELECT type,prio,anonLevel,expire,hash,value,uid FROM gn090 FORCE INDEX (idx_hash) WHERE hash=? ORDER BY uid LIMIT 1 OFFSET ?"
-  struct GNUNET_MysqlStatementHandle *select_entry_by_hash;
+  struct GNUNET_MYSQL_StatementHandle *select_entry_by_hash;
 
 #define COUNT_ENTRY_BY_HASH_AND_VHASH "SELECT count(*) FROM gn090 FORCE INDEX (idx_hash_vhash) WHERE hash=? AND vhash=?"
-  struct GNUNET_MysqlStatementHandle *count_entry_by_hash_and_vhash;
+  struct GNUNET_MYSQL_StatementHandle *count_entry_by_hash_and_vhash;
 
 #define SELECT_ENTRY_BY_HASH_AND_VHASH "SELECT type,prio,anonLevel,expire,hash,value,uid FROM gn090 FORCE INDEX (idx_hash_vhash) WHERE hash=? AND vhash=? ORDER BY uid LIMIT 1 OFFSET ?"
-  struct GNUNET_MysqlStatementHandle *select_entry_by_hash_and_vhash;
+  struct GNUNET_MYSQL_StatementHandle *select_entry_by_hash_and_vhash;
+
 #define COUNT_ENTRY_BY_HASH_AND_TYPE "SELECT count(*) FROM gn090 FORCE INDEX (idx_hash_type_uid) WHERE hash=? AND type=?"
-  struct GNUNET_MysqlStatementHandle *count_entry_by_hash_and_type;
+  struct GNUNET_MYSQL_StatementHandle *count_entry_by_hash_and_type;
 
 #define SELECT_ENTRY_BY_HASH_AND_TYPE "SELECT type,prio,anonLevel,expire,hash,value,uid FROM gn090 FORCE INDEX (idx_hash_type_uid) WHERE hash=? AND type=? ORDER BY uid LIMIT 1 OFFSET ?"
-  struct GNUNET_MysqlStatementHandle *select_entry_by_hash_and_type;
+  struct GNUNET_MYSQL_StatementHandle *select_entry_by_hash_and_type;
+
 #define COUNT_ENTRY_BY_HASH_VHASH_AND_TYPE "SELECT count(*) FROM gn090 FORCE INDEX (idx_hash_vhash) WHERE hash=? AND vhash=? AND type=?"
-  struct GNUNET_MysqlStatementHandle *count_entry_by_hash_vhash_and_type;
-  
+  struct GNUNET_MYSQL_StatementHandle *count_entry_by_hash_vhash_and_type;
+
 #define SELECT_ENTRY_BY_HASH_VHASH_AND_TYPE "SELECT type,prio,anonLevel,expire,hash,value,uid FROM gn090 FORCE INDEX (idx_hash_vhash) WHERE hash=? AND vhash=? AND type=? ORDER BY uid ASC LIMIT 1 OFFSET ?"
-  struct GNUNET_MysqlStatementHandle *select_entry_by_hash_vhash_and_type;
+  struct GNUNET_MYSQL_StatementHandle *select_entry_by_hash_vhash_and_type;
 
 #define UPDATE_ENTRY "UPDATE gn090 SET prio=prio+?,expire=IF(expire>=?,expire,?) WHERE uid=?"
-  struct GNUNET_MysqlStatementHandle *update_entry;
+  struct GNUNET_MYSQL_StatementHandle *update_entry;
 
 #define DEC_REPL "UPDATE gn090 SET repl=GREATEST (0, repl - 1) WHERE uid=?"
-  struct GNUNET_MysqlStatementHandle *dec_repl;
+  struct GNUNET_MYSQL_StatementHandle *dec_repl;
 
 #define SELECT_SIZE "SELECT SUM(BIT_LENGTH(value) DIV 8) FROM gn090"
-  struct GNUNET_MysqlStatementHandle *get_size;
+  struct GNUNET_MYSQL_StatementHandle *get_size;
 
 #define SELECT_IT_NON_ANONYMOUS "SELECT type,prio,anonLevel,expire,hash,value,uid "\
    "FROM gn090 FORCE INDEX (idx_anonLevel_type_rvalue) "\
@@ -239,13 +188,13 @@ struct Plugin
    "(rvalue >= ? OR"\
    "  NOT EXISTS (SELECT 1 FROM gn090 FORCE INDEX (idx_anonLevel_type_rvalue) WHERE anonLevel=0 AND type=? AND rvalue>=?)) "\
    "ORDER BY rvalue ASC LIMIT 1"
-  struct GNUNET_MysqlStatementHandle *zero_iter;
+  struct GNUNET_MYSQL_StatementHandle *zero_iter;
 
 #define SELECT_IT_EXPIRATION "SELECT type,prio,anonLevel,expire,hash,value,uid FROM gn090 FORCE INDEX (idx_expire) WHERE expire < ? ORDER BY expire ASC LIMIT 1"
-  struct GNUNET_MysqlStatementHandle *select_expiration;
+  struct GNUNET_MYSQL_StatementHandle *select_expiration;
 
 #define SELECT_IT_PRIORITY "SELECT type,prio,anonLevel,expire,hash,value,uid FROM gn090 FORCE INDEX (idx_prio) ORDER BY prio ASC LIMIT 1"
-  struct GNUNET_MysqlStatementHandle *select_priority;
+  struct GNUNET_MYSQL_StatementHandle *select_priority;
 
 #define SELECT_IT_REPLICATION "SELECT type,prio,anonLevel,expire,hash,value,uid "\
   "FROM gn090 FORCE INDEX (idx_repl_rvalue) "\
@@ -254,516 +203,15 @@ struct Plugin
   "  NOT EXISTS (SELECT 1 FROM gn090 FORCE INDEX (idx_repl_rvalue) WHERE repl=? AND rvalue>=?)) "\
   "ORDER BY rvalue ASC "\
   "LIMIT 1"
-  struct GNUNET_MysqlStatementHandle *select_replication;
+  struct GNUNET_MYSQL_StatementHandle *select_replication;
 
 #define SELECT_MAX_REPL "SELECT MAX(repl) FROM gn090"
-  struct GNUNET_MysqlStatementHandle *max_repl;
-
-};
-
-
-/**
- * Obtain the location of ".my.cnf".
- *
- * @param cfg our configuration
- * @return NULL on error
- */
-static char *
-get_my_cnf_path (const struct GNUNET_CONFIGURATION_Handle *cfg)
-{
-  char *cnffile;
-  char *home_dir;
-  struct stat st;
-#ifndef WINDOWS
-  struct passwd *pw;
-#endif
-  int configured;
-
-#ifndef WINDOWS
-  pw = getpwuid (getuid ());
-  if (!pw)
-    {
-      GNUNET_log_strerror (GNUNET_ERROR_TYPE_ERROR, 
-                          "getpwuid");
-      return NULL;
-    }
-  if (GNUNET_YES ==
-      GNUNET_CONFIGURATION_have_value (cfg,
-                                      "datastore-mysql", "CONFIG"))
-    {
-      GNUNET_assert (GNUNET_OK == 
-                    GNUNET_CONFIGURATION_get_value_filename (cfg,
-                                                             "datastore-mysql", "CONFIG", &cnffile));
-      configured = GNUNET_YES;
-    }
-  else
-    {
-      home_dir = GNUNET_strdup (pw->pw_dir);
-#else
-      home_dir = (char *) GNUNET_malloc (_MAX_PATH + 1);
-      plibc_conv_to_win_path ("~/", home_dir);
-#endif
-      GNUNET_asprintf (&cnffile, "%s/.my.cnf", home_dir);
-      GNUNET_free (home_dir);
-      configured = GNUNET_NO;
-    }
-  GNUNET_log (GNUNET_ERROR_TYPE_INFO,
-             _("Trying to use file `%s' for MySQL configuration.\n"),
-             cnffile);
-  if ((0 != STAT (cnffile, &st)) ||
-      (0 != ACCESS (cnffile, R_OK)) || (!S_ISREG (st.st_mode)))
-    {
-      if (configured == GNUNET_YES)
-       GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
-                   _("Could not access file `%s': %s\n"), cnffile,
-                   STRERROR (errno));
-      GNUNET_free (cnffile);
-      return NULL;
-    }
-  return cnffile;
-}
-
-
-/**
- * Close database connection and all prepared statements (we got a DB
- * disconnect error).
- * 
- * @param plugin plugin context
- */
-static int
-iclose (struct Plugin *plugin)
-{
-  struct GNUNET_MysqlStatementHandle *s;
-
-  for (s = plugin->shead; s != NULL; s = s->next)
-    {
-      if (s->valid)
-       {
-         mysql_stmt_close (s->statement);
-         s->valid = GNUNET_NO;
-       }
-    }
-  if (plugin->dbf != NULL)
-    {
-      mysql_close (plugin->dbf);
-      plugin->dbf = NULL;
-    }
-  return GNUNET_OK;
-}
-
-
-/**
- * Open the connection with the database (and initialize
- * our default options).
- *
- * @param plugin plugin context
- * @return GNUNET_OK on success
- */
-static int
-iopen (struct Plugin *plugin)
-{
-  char *mysql_dbname;
-  char *mysql_server;
-  char *mysql_user;
-  char *mysql_password;
-  unsigned long long mysql_port;
-  my_bool reconnect;
-  unsigned int timeout;
-
-  plugin->dbf = mysql_init (NULL);
-  if (plugin->dbf == NULL)
-    return GNUNET_SYSERR;
-  if (plugin->cnffile != NULL)
-    mysql_options (plugin->dbf, MYSQL_READ_DEFAULT_FILE, plugin->cnffile);
-  mysql_options (plugin->dbf, MYSQL_READ_DEFAULT_GROUP, "client");
-  reconnect = 0;
-  mysql_options (plugin->dbf, MYSQL_OPT_RECONNECT, &reconnect);
-  timeout = 120; /* in seconds */
-  mysql_options (plugin->dbf,
-                 MYSQL_OPT_CONNECT_TIMEOUT, (const void *) &timeout);
-  mysql_options(plugin->dbf, MYSQL_SET_CHARSET_NAME, "UTF8");
-  timeout = 60; /* in seconds */
-  mysql_options (plugin->dbf, MYSQL_OPT_READ_TIMEOUT, (const void *) &timeout);
-  mysql_options (plugin->dbf, MYSQL_OPT_WRITE_TIMEOUT, (const void *) &timeout);
-  mysql_dbname = NULL;
-  if (GNUNET_YES == GNUNET_CONFIGURATION_have_value (plugin->env->cfg,
-                                                    "datastore-mysql", "DATABASE"))
-    GNUNET_assert (GNUNET_OK == 
-                  GNUNET_CONFIGURATION_get_value_string (plugin->env->cfg,
-                                                         "datastore-mysql", "DATABASE", 
-                                                         &mysql_dbname));
-  else
-    mysql_dbname = GNUNET_strdup ("gnunet");
-  mysql_user = NULL;
-  if (GNUNET_YES == GNUNET_CONFIGURATION_have_value (plugin->env->cfg,
-                                                    "datastore-mysql", "USER"))
-    {
-      GNUNET_assert (GNUNET_OK == 
-                   GNUNET_CONFIGURATION_get_value_string (plugin->env->cfg,
-                                                          "datastore-mysql", "USER", 
-                                                          &mysql_user));
-    }
-  mysql_password = NULL;
-  if (GNUNET_YES == GNUNET_CONFIGURATION_have_value (plugin->env->cfg,
-                                                    "datastore-mysql", "PASSWORD"))
-    {
-      GNUNET_assert (GNUNET_OK ==
-                   GNUNET_CONFIGURATION_get_value_string (plugin->env->cfg,
-                                                          "datastore-mysql", "PASSWORD",
-                                                          &mysql_password));
-    }
-  mysql_server = NULL;
-  if (GNUNET_YES == GNUNET_CONFIGURATION_have_value (plugin->env->cfg,
-                                                    "datastore-mysql", "HOST"))
-    {
-      GNUNET_assert (GNUNET_OK == 
-                   GNUNET_CONFIGURATION_get_value_string (plugin->env->cfg,
-                                                          "datastore-mysql", "HOST", 
-                                                          &mysql_server));
-    }
-  mysql_port = 0;
-  if (GNUNET_YES == GNUNET_CONFIGURATION_have_value (plugin->env->cfg,
-                                                    "datastore-mysql", "PORT"))
-    {
-      GNUNET_assert (GNUNET_OK ==
-                   GNUNET_CONFIGURATION_get_value_number (plugin->env->cfg, "datastore-mysql",
-                                                          "PORT", &mysql_port));
-    }
-
-  GNUNET_assert (mysql_dbname != NULL);
-  mysql_real_connect (plugin->dbf, 
-                     mysql_server, 
-                     mysql_user, mysql_password,
-                      mysql_dbname, 
-                     (unsigned int) mysql_port, NULL,
-                     CLIENT_IGNORE_SIGPIPE);
-  GNUNET_free_non_null (mysql_server);
-  GNUNET_free_non_null (mysql_user);
-  GNUNET_free_non_null (mysql_password);
-  GNUNET_free (mysql_dbname);
-  if (mysql_error (plugin->dbf)[0])
-    {
-      LOG_MYSQL (GNUNET_ERROR_TYPE_ERROR,
-                 "mysql_real_connect", plugin);
-      return GNUNET_SYSERR;
-    }
-  return GNUNET_OK;
-}
-
-
-/**
- * Run the given MySQL statement.
- *
- * @param plugin plugin context
- * @param statement SQL statement to run
- * @return GNUNET_OK on success, GNUNET_SYSERR on error
- */
-static int
-run_statement (struct Plugin *plugin,
-              const char *statement)
-{
-  if ((NULL == plugin->dbf) && (GNUNET_OK != iopen (plugin)))
-    return GNUNET_SYSERR;
-  mysql_query (plugin->dbf, statement);
-  if (mysql_error (plugin->dbf)[0])
-    {
-      LOG_MYSQL (GNUNET_ERROR_TYPE_ERROR,
-                 "mysql_query", plugin);
-      iclose (plugin);
-      return GNUNET_SYSERR;
-    }
-  return GNUNET_OK;
-}
-
-
-/**
- * Create a prepared statement.
- *
- * @param plugin plugin context
- * @param statement SQL statement text to prepare
- * @return NULL on error
- */
-static struct GNUNET_MysqlStatementHandle *
-prepared_statement_create (struct Plugin *plugin, 
-                          const char *statement)
-{
-  struct GNUNET_MysqlStatementHandle *ret;
-
-  ret = GNUNET_malloc (sizeof (struct GNUNET_MysqlStatementHandle));
-  ret->query = GNUNET_strdup (statement);
-  GNUNET_CONTAINER_DLL_insert (plugin->shead,
-                              plugin->stail,
-                              ret);
-  return ret;
-}
-
-
-/**
- * Prepare a statement for running.
- *
- * @param plugin plugin context
- * @param ret handle to prepared statement
- * @return GNUNET_OK on success
- */
-static int
-prepare_statement (struct Plugin *plugin, 
-                  struct GNUNET_MysqlStatementHandle *ret)
-{
-  if (GNUNET_YES == ret->valid)
-    return GNUNET_OK;
-  if ((NULL == plugin->dbf) && 
-      (GNUNET_OK != iopen (plugin)))
-    return GNUNET_SYSERR;
-  ret->statement = mysql_stmt_init (plugin->dbf);
-  if (ret->statement == NULL)
-    {
-      iclose (plugin);
-      return GNUNET_SYSERR;
-    }
-  if (mysql_stmt_prepare (ret->statement, 
-                         ret->query,
-                         strlen (ret->query)))
-    {
-      GNUNET_log_from (GNUNET_ERROR_TYPE_ERROR,
-                      "mysql",
-                      _("Failed to prepare statement `%s'\n"),
-                      ret->query);
-      LOG_MYSQL (GNUNET_ERROR_TYPE_ERROR,
-                 "mysql_stmt_prepare", 
-                plugin);
-      mysql_stmt_close (ret->statement);
-      ret->statement = NULL;
-      iclose (plugin);
-      return GNUNET_SYSERR;
-    }
-  ret->valid = GNUNET_YES;
-  return GNUNET_OK;
-
-}
-
-
-/**
- * Bind the parameters for the given MySQL statement
- * and run it.
- *
- * @param plugin plugin context
- * @param s statement to bind and run
- * @param ap arguments for the binding
- * @return GNUNET_SYSERR on error, GNUNET_OK on success
- */
-static int
-init_params (struct Plugin *plugin,
-            struct GNUNET_MysqlStatementHandle *s,
-            va_list ap)
-{
-  MYSQL_BIND qbind[MAX_PARAM];
-  unsigned int pc;
-  unsigned int off;
-  enum enum_field_types ft;
-
-  pc = mysql_stmt_param_count (s->statement);
-  if (pc > MAX_PARAM)
-    {
-      /* increase internal constant! */
-      GNUNET_break (0);
-      return GNUNET_SYSERR;
-    }
-  memset (qbind, 0, sizeof (qbind));
-  off = 0;
-  ft = 0;
-  while ((pc > 0) && (-1 != (int) (ft = va_arg (ap, enum enum_field_types))))
-    {
-      qbind[off].buffer_type = ft;
-      switch (ft)
-        {
-        case MYSQL_TYPE_FLOAT:
-          qbind[off].buffer = va_arg (ap, float *);
-          break;
-        case MYSQL_TYPE_LONGLONG:
-          qbind[off].buffer = va_arg (ap, unsigned long long *);
-          qbind[off].is_unsigned = va_arg (ap, int);
-          break;
-        case MYSQL_TYPE_LONG:
-          qbind[off].buffer = va_arg (ap, unsigned int *);
-          qbind[off].is_unsigned = va_arg (ap, int);
-          break;
-        case MYSQL_TYPE_VAR_STRING:
-        case MYSQL_TYPE_STRING:
-        case MYSQL_TYPE_BLOB:
-          qbind[off].buffer = va_arg (ap, void *);
-          qbind[off].buffer_length = va_arg (ap, unsigned long);
-          qbind[off].length = va_arg (ap, unsigned long *);
-          break;
-        default:
-          /* unsupported type */
-          GNUNET_break (0);
-          return GNUNET_SYSERR;
-        }
-      pc--;
-      off++;
-    }
-  if (! ( (pc == 0) && (-1 != (int) ft) && (va_arg (ap, int) == -1) ) )
-    {
-      GNUNET_assert (0);
-      return GNUNET_SYSERR;
-    }
-  if (mysql_stmt_bind_param (s->statement, qbind))
-    {
-      GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
-                 _("`%s' failed at %s:%d with error: %s\n"),
-                 "mysql_stmt_bind_param",
-                 __FILE__, __LINE__, mysql_stmt_error (s->statement));
-      iclose (plugin);
-      return GNUNET_SYSERR;
-    }
-  if (mysql_stmt_execute (s->statement))
-    {
-      GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
-                 _("`%s' for `%s' failed at %s:%d with error: %s\n"),
-                 "mysql_stmt_execute",
-                 s->query,
-                 __FILE__, __LINE__, mysql_stmt_error (s->statement));
-      iclose (plugin);
-      return GNUNET_SYSERR;
-    }
-  return GNUNET_OK;
-}
+  struct GNUNET_MYSQL_StatementHandle *max_repl;
 
+#define GET_ALL_KEYS "SELECT hash from gn090"
+  struct GNUNET_MYSQL_StatementHandle *get_all_keys;
 
-/**
- * Run a prepared SELECT statement.
- *
- * @param plugin plugin context
- * @param s statement to run
- * @param result_size number of elements in results array
- * @param results pointer to already initialized MYSQL_BIND
- *        array (of sufficient size) for passing results
- * @param ap pairs and triplets of "MYSQL_TYPE_XXX" keys and their respective
- *        values (size + buffer-reference for pointers); terminated
- *        with "-1"
- * @return GNUNET_SYSERR on error, otherwise GNUNET_OK or GNUNET_NO (no result)
- */
-static int
-prepared_statement_run_select_va (struct Plugin *plugin,
-                                 struct GNUNET_MysqlStatementHandle *s,
-                                 unsigned int result_size,
-                                 MYSQL_BIND *results,
-                                 va_list ap)
-{
-  int ret;
-  unsigned int rsize;
-
-  if (GNUNET_OK != prepare_statement (plugin, s))
-    {
-      GNUNET_break (0);
-      return GNUNET_SYSERR;
-    }
-  if (GNUNET_OK != init_params (plugin, s, ap))
-    {
-      GNUNET_break (0);
-      return GNUNET_SYSERR;
-    }
-  rsize = mysql_stmt_field_count (s->statement);
-  if (rsize > result_size)
-    {
-      GNUNET_break (0);
-      return GNUNET_SYSERR;
-    }
-  if (mysql_stmt_bind_result (s->statement, results))
-    {
-      GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
-                 _("`%s' failed at %s:%d with error: %s\n"),
-                 "mysql_stmt_bind_result",
-                 __FILE__, __LINE__, mysql_stmt_error (s->statement));
-      iclose (plugin);
-      return GNUNET_SYSERR;
-    }
-  ret = mysql_stmt_fetch (s->statement);
-  if (ret == MYSQL_NO_DATA)
-    return GNUNET_NO;
-  if (ret != 0)
-    {
-      GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
-                 _("`%s' failed at %s:%d with error: %s\n"),
-                 "mysql_stmt_fetch",
-                 __FILE__, __LINE__, mysql_stmt_error (s->statement));
-      iclose (plugin);
-      return GNUNET_SYSERR;
-    }
-  mysql_stmt_reset (s->statement);
-  return GNUNET_OK;
-}
-
-
-/**
- * Run a prepared SELECT statement.
- *
- * @param plugin plugin context
- * @param s statement to run
- * @param result_size number of elements in results array
- * @param results pointer to already initialized MYSQL_BIND
- *        array (of sufficient size) for passing results
- * @param ... pairs and triplets of "MYSQL_TYPE_XXX" keys and their respective
- *        values (size + buffer-reference for pointers); terminated
- *        with "-1"
- * @return GNUNET_SYSERR on error, otherwise
- *         the number of successfully affected (or queried) rows
- */
-static int
-prepared_statement_run_select (struct Plugin *plugin,
-                              struct GNUNET_MysqlStatementHandle *s,
-                              unsigned int result_size,
-                              MYSQL_BIND *results,
-                              ...)
-{
-  va_list ap;
-  int ret;
-
-  va_start (ap, results);
-  ret = prepared_statement_run_select_va (plugin, s, 
-                                         result_size, results,
-                                         ap);
-  va_end (ap);
-  return ret;
-}
-
-
-/**
- * Run a prepared statement that does NOT produce results.
- *
- * @param plugin plugin context
- * @param s statement to run
- * @param insert_id NULL or address where to store the row ID of whatever
- *        was inserted (only for INSERT statements!)
- * @param ... pairs and triplets of "MYSQL_TYPE_XXX" keys and their respective
- *        values (size + buffer-reference for pointers); terminated
- *        with "-1"
- * @return GNUNET_SYSERR on error, otherwise
- *         the number of successfully affected rows
- */
-static int
-prepared_statement_run (struct Plugin *plugin,
-                       struct GNUNET_MysqlStatementHandle *s,
-                       unsigned long long *insert_id, ...)
-{
-  va_list ap;
-  int affected;
-
-  if (GNUNET_OK != prepare_statement (plugin, s))
-    return GNUNET_SYSERR;
-  va_start (ap, insert_id);
-  if (GNUNET_OK != init_params (plugin, s, ap))
-    {
-      va_end (ap);
-      return GNUNET_SYSERR;
-    }
-  va_end (ap);
-  affected = mysql_stmt_affected_rows (s->statement);
-  if (NULL != insert_id)
-    *insert_id = (unsigned long long) mysql_stmt_insert_id (s->statement);
-  mysql_stmt_reset (s->statement);
-  return affected;
-}
+};
 
 
 /**
@@ -774,26 +222,19 @@ prepared_statement_run (struct Plugin *plugin,
  * @return GNUNET_OK on success, GNUNET_NO if no such value exists, GNUNET_SYSERR on error
  */
 static int
-do_delete_entry (struct Plugin *plugin,
-                unsigned long long uid)
+do_delete_entry (struct Plugin *plugin, unsigned long long uid)
 {
   int ret;
-#if DEBUG_MYSQL
-  GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
-             "Deleting value %llu from gn090 table\n",
-             uid);
-#endif
-  ret = prepared_statement_run (plugin,
-                               plugin->delete_entry_by_uid,
-                               NULL,
-                               MYSQL_TYPE_LONGLONG, &uid, GNUNET_YES,
-                               -1);
+
+  GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Deleting value %llu from gn090 table\n",
+              uid);
+  ret = GNUNET_MYSQL_statement_run_prepared (plugin->mc,
+                                            plugin->delete_entry_by_uid, NULL,
+                                            MYSQL_TYPE_LONGLONG, &uid, GNUNET_YES, -1);
   if (ret >= 0)
     return GNUNET_OK;
   GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
-             "Deleting value %llu from gn090 table failed\n",
-             uid);
+              "Deleting value %llu from gn090 table failed\n", uid);
   return ret;
 }
 
@@ -817,11 +258,8 @@ mysql_plugin_estimate_size (void *cls)
   cbind[0].buffer_type = MYSQL_TYPE_LONGLONG;
   cbind[0].buffer = &total;
   cbind[0].is_unsigned = GNUNET_NO;
-  if (GNUNET_OK != 
-      prepared_statement_run_select (plugin,
-                                    plugin->get_size,
-                                    1, cbind, 
-                                    -1))
+  if (GNUNET_OK !=
+      GNUNET_MYSQL_statement_run_prepared_select (plugin->mc, plugin->get_size, 1, cbind, NULL, NULL, -1))
     return 0;
   return total;
 }
@@ -843,62 +281,50 @@ mysql_plugin_estimate_size (void *cls)
  * @return GNUNET_OK on success
  */
 static int
-mysql_plugin_put (void *cls,
-                 const GNUNET_HashCode * key,
-                 uint32_t size,
-                 const void *data,
-                 enum GNUNET_BLOCK_Type type,
-                 uint32_t priority,
-                 uint32_t anonymity,
-                 uint32_t replication,
-                 struct GNUNET_TIME_Absolute expiration,
-                 char **msg)
+mysql_plugin_put (void *cls, const struct GNUNET_HashCode * key, uint32_t size,
+                  const void *data, enum GNUNET_BLOCK_Type type,
+                  uint32_t priority, uint32_t anonymity, uint32_t replication,
+                  struct GNUNET_TIME_Absolute expiration, char **msg)
 {
   struct Plugin *plugin = cls;
   unsigned int irepl = replication;
   unsigned int ipriority = priority;
   unsigned int ianonymity = anonymity;
   unsigned long long lexpiration = expiration.abs_value;
-  unsigned long long lrvalue = (unsigned long long) GNUNET_CRYPTO_random_u64 (GNUNET_CRYPTO_QUALITY_WEAK,
-                                                                             UINT64_MAX);
+  unsigned long long lrvalue =
+      (unsigned long long) GNUNET_CRYPTO_random_u64 (GNUNET_CRYPTO_QUALITY_WEAK,
+                                                     UINT64_MAX);
   unsigned long hashSize;
   unsigned long hashSize2;
   unsigned long lsize;
-  GNUNET_HashCode vhash;
+  struct GNUNET_HashCode vhash;
 
   if (size > MAX_DATUM_SIZE)
-    {
-      GNUNET_break (0);
-      return GNUNET_SYSERR;
-    }
-  hashSize = sizeof (GNUNET_HashCode);
-  hashSize2 = sizeof (GNUNET_HashCode);
+  {
+    GNUNET_break (0);
+    return GNUNET_SYSERR;
+  }
+  hashSize = sizeof (struct GNUNET_HashCode);
+  hashSize2 = sizeof (struct GNUNET_HashCode);
   lsize = size;
   GNUNET_CRYPTO_hash (data, size, &vhash);
   if (GNUNET_OK !=
-      prepared_statement_run (plugin,
-                             plugin->insert_entry,
-                             NULL,
-                             MYSQL_TYPE_LONG, &irepl, GNUNET_YES,
-                             MYSQL_TYPE_LONG, &type, GNUNET_YES,
-                             MYSQL_TYPE_LONG, &ipriority, GNUNET_YES,
-                             MYSQL_TYPE_LONG, &ianonymity, GNUNET_YES,
-                             MYSQL_TYPE_LONGLONG, &lexpiration, GNUNET_YES,
-                             MYSQL_TYPE_LONGLONG, &lrvalue, GNUNET_YES,
-                             MYSQL_TYPE_BLOB, key, hashSize, &hashSize,
-                             MYSQL_TYPE_BLOB, &vhash, hashSize2, &hashSize2,
-                             MYSQL_TYPE_BLOB, data, lsize, &lsize, 
-                             -1))
-    return GNUNET_SYSERR;    
-#if DEBUG_MYSQL
+      GNUNET_MYSQL_statement_run_prepared (plugin->mc, plugin->insert_entry, NULL,
+                              MYSQL_TYPE_LONG, &irepl, GNUNET_YES,
+                              MYSQL_TYPE_LONG, &type, GNUNET_YES,
+                              MYSQL_TYPE_LONG, &ipriority, GNUNET_YES,
+                              MYSQL_TYPE_LONG, &ianonymity, GNUNET_YES,
+                              MYSQL_TYPE_LONGLONG, &lexpiration, GNUNET_YES,
+                              MYSQL_TYPE_LONGLONG, &lrvalue, GNUNET_YES,
+                              MYSQL_TYPE_BLOB, key, hashSize, &hashSize,
+                              MYSQL_TYPE_BLOB, &vhash, hashSize2, &hashSize2,
+                              MYSQL_TYPE_BLOB, data, lsize, &lsize, -1))
+    return GNUNET_SYSERR;
   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
-             "Inserted value `%s' with size %u into gn090 table\n",
-             GNUNET_h2s (key),
-             (unsigned int) size);
-#endif
+              "Inserted value `%s' with size %u into gn090 table\n",
+              GNUNET_h2s (key), (unsigned int) size);
   if (size > 0)
-    plugin->env->duc (plugin->env->cls,
-                     size);
+    plugin->env->duc (plugin->env->cls, size);
   return GNUNET_OK;
 }
 
@@ -927,38 +353,28 @@ mysql_plugin_put (void *cls,
  * @return GNUNET_OK on success
  */
 static int
-mysql_plugin_update (void *cls,
-                    uint64_t uid,
-                    int delta, 
-                    struct GNUNET_TIME_Absolute expire,
-                    char **msg)
+mysql_plugin_update (void *cls, uint64_t uid, int delta,
+                     struct GNUNET_TIME_Absolute expire, char **msg)
 {
   struct Plugin *plugin = cls;
   unsigned long long vkey = uid;
   unsigned long long lexpire = expire.abs_value;
   int ret;
 
-#if DEBUG_MYSQL
   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
-             "Updating value %llu adding %d to priority and maxing exp at %llu\n",
-             vkey,
-             delta,
-             lexpire);
-#endif
-  ret = prepared_statement_run (plugin,
-                               plugin->update_entry,
-                               NULL,
-                               MYSQL_TYPE_LONG, &delta, GNUNET_NO,
-                               MYSQL_TYPE_LONGLONG, &lexpire, GNUNET_YES,
-                               MYSQL_TYPE_LONGLONG, &lexpire, GNUNET_YES,
-                               MYSQL_TYPE_LONGLONG, &vkey, GNUNET_YES, 
-                               -1);
+              "Updating value %llu adding %d to priority and maxing exp at %llu\n",
+              vkey, delta, lexpire);
+  ret =
+    GNUNET_MYSQL_statement_run_prepared (plugin->mc, plugin->update_entry, NULL,
+                                        MYSQL_TYPE_LONG, &delta, GNUNET_NO,
+                              MYSQL_TYPE_LONGLONG, &lexpire, GNUNET_YES,
+                              MYSQL_TYPE_LONGLONG, &lexpire, GNUNET_YES,
+                              MYSQL_TYPE_LONGLONG, &vkey, GNUNET_YES, -1);
   if (ret != GNUNET_OK)
-    {
-      GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
-                 "Failed to update value %llu\n",
-                 vkey);
-    }
+  {
+    GNUNET_log (GNUNET_ERROR_TYPE_WARNING, "Failed to update value %llu\n",
+                vkey);
+  }
   return ret;
 }
 
@@ -973,11 +389,9 @@ mysql_plugin_update (void *cls,
  * @param proc_cls closure for proc
  * @param ... arguments to initialize stmt
  */
-static void 
-execute_select (struct Plugin *plugin,
-               struct GNUNET_MysqlStatementHandle *stmt,
-               PluginDatumProcessor proc, void *proc_cls,
-               ...)
+static void
+execute_select (struct Plugin *plugin, struct GNUNET_MYSQL_StatementHandle *stmt,
+                PluginDatumProcessor proc, void *proc_cls, ...)
 {
   va_list ap;
   int ret;
@@ -989,11 +403,11 @@ execute_select (struct Plugin *plugin,
   unsigned long size;
   unsigned long long uid;
   char value[GNUNET_DATASTORE_MAX_VALUE_SIZE];
-  GNUNET_HashCode key;
+  struct GNUNET_HashCode key;
   struct GNUNET_TIME_Absolute expiration;
   MYSQL_BIND rbind[7];
 
-  hashSize = sizeof (GNUNET_HashCode);
+  hashSize = sizeof (struct GNUNET_HashCode);
   memset (rbind, 0, sizeof (rbind));
   rbind[0].buffer_type = MYSQL_TYPE_LONG;
   rbind[0].buffer = &type;
@@ -1020,51 +434,35 @@ execute_select (struct Plugin *plugin,
   rbind[6].is_unsigned = 1;
 
   va_start (ap, proc_cls);
-  ret = prepared_statement_run_select_va (plugin,
-                                         stmt,
-                                         7, rbind,
-                                         ap);
+  ret = GNUNET_MYSQL_statement_run_prepared_select_va (plugin->mc, stmt, 7, rbind, NULL, NULL, ap);
   va_end (ap);
   if (ret <= 0)
-    {
-      proc (proc_cls, 
-           NULL, 0, NULL, 0, 0, 0, 
-           GNUNET_TIME_UNIT_ZERO_ABS, 0);
-      return;
-    }
-  GNUNET_assert (size <= sizeof(value));
-  if ( (rbind[4].buffer_length != sizeof (GNUNET_HashCode)) ||
-       (hashSize != sizeof (GNUNET_HashCode)) )
-    {
-      GNUNET_break (0);
-      proc (proc_cls, 
-           NULL, 0, NULL, 0, 0, 0, 
-           GNUNET_TIME_UNIT_ZERO_ABS, 0);
-      return;
-    }    
-#if DEBUG_MYSQL
+  {
+    proc (proc_cls, NULL, 0, NULL, 0, 0, 0, GNUNET_TIME_UNIT_ZERO_ABS, 0);
+    return;
+  }
+  GNUNET_assert (size <= sizeof (value));
+  if ((rbind[4].buffer_length != sizeof (struct GNUNET_HashCode)) ||
+      (hashSize != sizeof (struct GNUNET_HashCode)))
+  {
+    GNUNET_break (0);
+    proc (proc_cls, NULL, 0, NULL, 0, 0, 0, GNUNET_TIME_UNIT_ZERO_ABS, 0);
+    return;
+  }
   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
-             "Found %u-byte value under key `%s' with prio %u, anon %u, expire %llu selecting from gn090 table\n",
-             (unsigned int) size,
-             GNUNET_h2s (&key),
-             priority,
-             anonymity,
-             exp);
-#endif
+              "Found %u-byte value under key `%s' with prio %u, anon %u, expire %llu selecting from gn090 table\n",
+              (unsigned int) size, GNUNET_h2s (&key), priority, anonymity, exp);
   GNUNET_assert (size < MAX_DATUM_SIZE);
   expiration.abs_value = exp;
-  ret = proc (proc_cls, 
-             &key,
-             size, value,
-             type, priority, anonymity, expiration,
-             uid);
+  ret =
+      proc (proc_cls, &key, size, value, type, priority, anonymity, expiration,
+            uid);
   if (ret == GNUNET_NO)
-    {
-      do_delete_entry (plugin, uid);
-      if (size != 0)
-       plugin->env->duc (plugin->env->cls,
-                         - size);
-    }
+  {
+    do_delete_entry (plugin, uid);
+    if (size != 0)
+      plugin->env->duc (plugin->env->cls, -size);
+  }
 }
 
 
@@ -1073,7 +471,7 @@ execute_select (struct Plugin *plugin,
  * Get one of the results for a particular key in the datastore.
  *
  * @param cls closure
- * @param offset offset of the result (modulo num-results); 
+ * @param offset offset of the result (modulo num-results);
  *               specific ordering does not matter for the offset
  * @param key key to match, never NULL
  * @param vhash hash of the value, maybe NULL (to
@@ -1083,17 +481,15 @@ execute_select (struct Plugin *plugin,
  *        there may be!
  * @param type entries of which type are relevant?
  *     Use 0 for any type.
- * @param proc function to call on the matching value, 
+ * @param proc function to call on the matching value,
  *        with NULL for if no value matches
  * @param proc_cls closure for proc
  */
 static void
-mysql_plugin_get_key (void *cls,
-                     uint64_t offset,
-                     const GNUNET_HashCode *key,
-                     const GNUNET_HashCode *vhash,
-                     enum GNUNET_BLOCK_Type type,                    
-                     PluginDatumProcessor proc, void *proc_cls)
+mysql_plugin_get_key (void *cls, uint64_t offset, const struct GNUNET_HashCode * key,
+                      const struct GNUNET_HashCode * vhash,
+                      enum GNUNET_BLOCK_Type type, PluginDatumProcessor proc,
+                      void *proc_cls)
 {
   struct Plugin *plugin = cls;
   int ret;
@@ -1105,123 +501,100 @@ mysql_plugin_get_key (void *cls,
 
   GNUNET_assert (key != NULL);
   GNUNET_assert (NULL != proc);
-  hashSize = sizeof (GNUNET_HashCode);
-  hashSize2 = sizeof (GNUNET_HashCode);
+  hashSize = sizeof (struct GNUNET_HashCode);
+  hashSize2 = sizeof (struct GNUNET_HashCode);
   memset (cbind, 0, sizeof (cbind));
   total = -1;
   cbind[0].buffer_type = MYSQL_TYPE_LONGLONG;
   cbind[0].buffer = &total;
   cbind[0].is_unsigned = GNUNET_NO;
   if (type != 0)
+  {
+    if (vhash != NULL)
+    {
+      ret =
+       GNUNET_MYSQL_statement_run_prepared_select (plugin->mc,
+                                         plugin->
+                                         count_entry_by_hash_vhash_and_type, 1,
+                                                   cbind, NULL, NULL, MYSQL_TYPE_BLOB, key, hashSize,
+                                         &hashSize, MYSQL_TYPE_BLOB, vhash,
+                                         hashSize2, &hashSize2, MYSQL_TYPE_LONG,
+                                         &type, GNUNET_YES, -1);
+    }
+    else
     {
-      if (vhash != NULL)
-        {
-          ret =
-            prepared_statement_run_select (plugin,
-                                          plugin->count_entry_by_hash_vhash_and_type, 
-                                          1, cbind, 
-                                          MYSQL_TYPE_BLOB, key, hashSize, &hashSize, 
-                                          MYSQL_TYPE_BLOB, vhash, hashSize2, &hashSize2, 
-                                          MYSQL_TYPE_LONG, &type, GNUNET_YES,
-                                          -1);
-        }
-      else
-        {
-          ret =
-            prepared_statement_run_select (plugin,
-                                          plugin->count_entry_by_hash_and_type, 
-                                          1, cbind, 
-                                          MYSQL_TYPE_BLOB, key, hashSize, &hashSize, 
-                                          MYSQL_TYPE_LONG, &type, GNUNET_YES,
-                                          -1);
-        }
+      ret =
+       GNUNET_MYSQL_statement_run_prepared_select (plugin->mc,
+                                         plugin->count_entry_by_hash_and_type,
+                                                   1, cbind, NULL, NULL, MYSQL_TYPE_BLOB, key,
+                                         hashSize, &hashSize, MYSQL_TYPE_LONG,
+                                         &type, GNUNET_YES, -1);
     }
+  }
   else
+  {
+    if (vhash != NULL)
     {
-      if (vhash != NULL)
-        {
-          ret =
-            prepared_statement_run_select (plugin,
-                                          plugin->count_entry_by_hash_and_vhash, 
-                                          1, cbind,
-                                          MYSQL_TYPE_BLOB, key, hashSize, &hashSize, 
-                                          MYSQL_TYPE_BLOB, vhash, hashSize2, &hashSize2, 
-                                          -1);
-
-        }
-      else
-        {
-          ret =
-            prepared_statement_run_select (plugin,
-                                          plugin->count_entry_by_hash,
-                                          1, cbind, 
-                                          MYSQL_TYPE_BLOB, key, hashSize, &hashSize, 
-                                          -1);
-        }
+      ret =
+       GNUNET_MYSQL_statement_run_prepared_select (plugin->mc,
+                                         plugin->count_entry_by_hash_and_vhash,
+                                                   1, cbind, NULL, NULL, MYSQL_TYPE_BLOB, key,
+                                         hashSize, &hashSize, MYSQL_TYPE_BLOB,
+                                         vhash, hashSize2, &hashSize2, -1);
+
     }
-  if ((ret != GNUNET_OK) || (0 >= total))
+    else
     {
-      proc (proc_cls, 
-           NULL, 0, NULL, 0, 0, 0, 
-           GNUNET_TIME_UNIT_ZERO_ABS, 0);
-      return;
+      ret =
+       GNUNET_MYSQL_statement_run_prepared_select (plugin->mc, plugin->count_entry_by_hash, 1,
+                                                   cbind, NULL, NULL, MYSQL_TYPE_BLOB, key, hashSize,
+                                         &hashSize, -1);
     }
+  }
+  if ((ret != GNUNET_OK) || (0 >= total))
+  {
+    proc (proc_cls, NULL, 0, NULL, 0, 0, 0, GNUNET_TIME_UNIT_ZERO_ABS, 0);
+    return;
+  }
   offset = offset % total;
   off = (unsigned long long) offset;
-#if DEBUG_MYSQL
   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
-             "Obtaining %llu/%lld result for GET `%s'\n",
-             off,
-             total,
-             GNUNET_h2s (key));
-#endif
-
+              "Obtaining %llu/%lld result for GET `%s'\n", off, total,
+              GNUNET_h2s (key));
   if (type != GNUNET_BLOCK_TYPE_ANY)
+  {
+    if (NULL != vhash)
     {
-      if (NULL != vhash)
-       {
-         execute_select (plugin,
-                         plugin->select_entry_by_hash_vhash_and_type, 
-                         proc, proc_cls,
-                         MYSQL_TYPE_BLOB, key, hashSize, &hashSize,
-                         MYSQL_TYPE_BLOB, vhash, hashSize, &hashSize,
-                         MYSQL_TYPE_LONG, &type, GNUNET_YES, 
-                         MYSQL_TYPE_LONGLONG, &off, GNUNET_YES,
-                         -1);
-       }
-      else
-       {
-         execute_select (plugin,
-                         plugin->select_entry_by_hash_and_type, 
-                         proc, proc_cls,
-                         MYSQL_TYPE_BLOB, key, hashSize, &hashSize,
-                         MYSQL_TYPE_LONG, &type, GNUNET_YES, 
-                         MYSQL_TYPE_LONGLONG, &off, GNUNET_YES,
-                         -1);
-       }
+      execute_select (plugin, plugin->select_entry_by_hash_vhash_and_type, proc,
+                      proc_cls, MYSQL_TYPE_BLOB, key, hashSize, &hashSize,
+                      MYSQL_TYPE_BLOB, vhash, hashSize, &hashSize,
+                      MYSQL_TYPE_LONG, &type, GNUNET_YES, MYSQL_TYPE_LONGLONG,
+                      &off, GNUNET_YES, -1);
     }
+    else
+    {
+      execute_select (plugin, plugin->select_entry_by_hash_and_type, proc,
+                      proc_cls, MYSQL_TYPE_BLOB, key, hashSize, &hashSize,
+                      MYSQL_TYPE_LONG, &type, GNUNET_YES, MYSQL_TYPE_LONGLONG,
+                      &off, GNUNET_YES, -1);
+    }
+  }
   else
+  {
+    if (NULL != vhash)
     {
-      if (NULL != vhash)
-       {
-         execute_select (plugin,
-                         plugin->select_entry_by_hash_and_vhash, 
-                         proc, proc_cls,
-                         MYSQL_TYPE_BLOB, key, hashSize, &hashSize, 
-                         MYSQL_TYPE_BLOB, vhash, hashSize, &hashSize, 
-                         MYSQL_TYPE_LONGLONG, &off, GNUNET_YES, 
-                         -1);
-       }
-      else
-       {
-         execute_select (plugin,
-                         plugin->select_entry_by_hash, 
-                         proc, proc_cls,
-                         MYSQL_TYPE_BLOB, key, hashSize, &hashSize,
-                         MYSQL_TYPE_LONGLONG, &off, GNUNET_YES, 
-                         -1);
-       }
+      execute_select (plugin, plugin->select_entry_by_hash_and_vhash, proc,
+                      proc_cls, MYSQL_TYPE_BLOB, key, hashSize, &hashSize,
+                      MYSQL_TYPE_BLOB, vhash, hashSize, &hashSize,
+                      MYSQL_TYPE_LONGLONG, &off, GNUNET_YES, -1);
     }
+    else
+    {
+      execute_select (plugin, plugin->select_entry_by_hash, proc, proc_cls,
+                      MYSQL_TYPE_BLOB, key, hashSize, &hashSize,
+                      MYSQL_TYPE_LONGLONG, &off, GNUNET_YES, -1);
+    }
+  }
 }
 
 
@@ -1236,22 +609,19 @@ mysql_plugin_get_key (void *cls,
  * @param proc_cls closure for iter
  */
 static void
-mysql_plugin_get_zero_anonymity (void *cls,
-                                uint64_t offset,
-                                enum GNUNET_BLOCK_Type type,
-                                PluginDatumProcessor proc, void *proc_cls)
+mysql_plugin_get_zero_anonymity (void *cls, uint64_t offset,
+                                 enum GNUNET_BLOCK_Type type,
+                                 PluginDatumProcessor proc, void *proc_cls)
 {
   struct Plugin *plugin = cls;
-  unsigned long long rvalue = (unsigned long long) GNUNET_CRYPTO_random_u64 (GNUNET_CRYPTO_QUALITY_WEAK,
-                                                                            UINT64_MAX);
-  execute_select (plugin,
-                 plugin->zero_iter,
-                 proc, proc_cls,
-                 MYSQL_TYPE_LONG, &type, GNUNET_YES,
-                 MYSQL_TYPE_LONGLONG, &rvalue, GNUNET_YES,
-                 MYSQL_TYPE_LONG, &type, GNUNET_YES,
-                 MYSQL_TYPE_LONGLONG, &rvalue, GNUNET_YES,
-                 -1);
+  unsigned long long rvalue =
+      (unsigned long long) GNUNET_CRYPTO_random_u64 (GNUNET_CRYPTO_QUALITY_WEAK,
+                                                     UINT64_MAX);
+
+  execute_select (plugin, plugin->zero_iter, proc, proc_cls, MYSQL_TYPE_LONG,
+                  &type, GNUNET_YES, MYSQL_TYPE_LONGLONG, &rvalue, GNUNET_YES,
+                  MYSQL_TYPE_LONG, &type, GNUNET_YES, MYSQL_TYPE_LONGLONG,
+                  &rvalue, GNUNET_YES, -1);
 }
 
 
@@ -1260,17 +630,17 @@ mysql_plugin_get_zero_anonymity (void *cls,
  */
 struct ReplCtx
 {
-  
+
   /**
    * Plugin handle.
    */
   struct Plugin *plugin;
-  
+
   /**
    * Function to call for the result (or the NULL).
    */
   PluginDatumProcessor proc;
-  
+
   /**
    * Closure for proc.
    */
@@ -1299,15 +669,10 @@ struct ReplCtx
  *         GNUNET_NO to delete the item and continue (if supported)
  */
 static int
-repl_proc (void *cls,
-          const GNUNET_HashCode *key,
-          uint32_t size,
-          const void *data,
-          enum GNUNET_BLOCK_Type type,
-          uint32_t priority,
-          uint32_t anonymity,
-          struct GNUNET_TIME_Absolute expiration, 
-          uint64_t uid)
+repl_proc (void *cls, const struct GNUNET_HashCode * key, uint32_t size,
+           const void *data, enum GNUNET_BLOCK_Type type, uint32_t priority,
+           uint32_t anonymity, struct GNUNET_TIME_Absolute expiration,
+           uint64_t uid)
 {
   struct ReplCtx *rc = cls;
   struct Plugin *plugin = rc->plugin;
@@ -1315,26 +680,22 @@ repl_proc (void *cls,
   int ret;
   int iret;
 
-  ret = rc->proc (rc->proc_cls,
-                 key,
-                 size, data, 
-                 type, priority, anonymity, expiration,
-                 uid);
+  ret =
+      rc->proc (rc->proc_cls, key, size, data, type, priority, anonymity,
+                expiration, uid);
   if (NULL != key)
+  {
+    oid = (unsigned long long) uid;
+    iret =
+      GNUNET_MYSQL_statement_run_prepared (plugin->mc, plugin->dec_repl, NULL,
+                                          MYSQL_TYPE_LONGLONG, &oid, GNUNET_YES, -1);
+    if (iret == GNUNET_SYSERR)
     {
-      oid = (unsigned long long) uid;
-      iret = prepared_statement_run (plugin,
-                                    plugin->dec_repl,
-                                    NULL,
-                                    MYSQL_TYPE_LONGLONG, &oid, GNUNET_YES, 
-                                    -1);
-      if (iret == GNUNET_SYSERR)
-       {
-         GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
-                     "Failed to reduce replication counter\n");
-         return GNUNET_SYSERR;
-       }
+      GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
+                  "Failed to reduce replication counter\n");
+      return GNUNET_SYSERR;
     }
+  }
   return ret;
 }
 
@@ -1351,15 +712,15 @@ repl_proc (void *cls,
  * @param proc_cls closure for proc
  */
 static void
-mysql_plugin_get_replication (void *cls,
-                             PluginDatumProcessor proc, void *proc_cls)
+mysql_plugin_get_replication (void *cls, PluginDatumProcessor proc,
+                              void *proc_cls)
 {
   struct Plugin *plugin = cls;
   struct ReplCtx rc;
   unsigned long long rvalue;
   unsigned long repl;
   MYSQL_BIND results;
-  
+
   rc.plugin = plugin;
   rc.proc = proc;
   rc.proc_cls = proc_cls;
@@ -1369,29 +730,97 @@ mysql_plugin_get_replication (void *cls,
   results.is_unsigned = GNUNET_YES;
 
   if (1 !=
-      prepared_statement_run_select (plugin,
-                                    plugin->max_repl,
-                                    1,
-                                    &results,
-                                    -1))
-    {
-      proc (proc_cls, 
-           NULL, 0, NULL, 0, 0, 0, 
-           GNUNET_TIME_UNIT_ZERO_ABS, 0);
-      return;      
-    }
+      GNUNET_MYSQL_statement_run_prepared_select (plugin->mc, plugin->max_repl, 1, &results, NULL, NULL, -1))
+  {
+    proc (proc_cls, NULL, 0, NULL, 0, 0, 0, GNUNET_TIME_UNIT_ZERO_ABS, 0);
+    return;
+  }
+
+  rvalue =
+      (unsigned long long) GNUNET_CRYPTO_random_u64 (GNUNET_CRYPTO_QUALITY_WEAK,
+                                                     UINT64_MAX);
+  execute_select (plugin, plugin->select_replication, &repl_proc, &rc,
+                  MYSQL_TYPE_LONG, &repl, GNUNET_YES, MYSQL_TYPE_LONGLONG,
+                  &rvalue, GNUNET_YES, MYSQL_TYPE_LONG, &repl, GNUNET_YES,
+                  MYSQL_TYPE_LONGLONG, &rvalue, GNUNET_YES, -1);
+
+}
 
-  rvalue = (unsigned long long) GNUNET_CRYPTO_random_u64 (GNUNET_CRYPTO_QUALITY_WEAK,
-                                                         UINT64_MAX);
-  execute_select (plugin,
-                 plugin->select_replication, 
-                 &repl_proc, &rc,
-                 MYSQL_TYPE_LONG, &repl, GNUNET_YES, 
-                 MYSQL_TYPE_LONGLONG, &rvalue, GNUNET_YES, 
-                 MYSQL_TYPE_LONG, &repl, GNUNET_YES, 
-                 MYSQL_TYPE_LONGLONG, &rvalue, GNUNET_YES, 
-                 -1);
 
+/**
+ * Get all of the keys in the datastore.
+ *
+ * @param cls closure
+ * @param proc function to call on each key
+ * @param proc_cls closure for proc
+ */
+static void
+mysql_plugin_get_keys (void *cls,
+                       PluginKeyProcessor proc,
+                       void *proc_cls)
+{
+  struct Plugin *plugin = cls;
+  const char *query = "SELECT hash FROM gn090";
+  int ret;
+  MYSQL_STMT *statement;
+  struct GNUNET_HashCode key;
+  MYSQL_BIND cbind[1];
+  unsigned long length;
+  statement = GNUNET_MYSQL_statement_get_stmt (plugin->mc,
+                                              plugin->get_all_keys);
+  if (statement == NULL)
+  {
+    GNUNET_MYSQL_statements_invalidate (plugin->mc);
+    return;
+  }
+  if (mysql_stmt_prepare (statement, query, strlen (query)))
+  {
+    GNUNET_log_from (GNUNET_ERROR_TYPE_ERROR, "mysql",
+                     _("Failed to prepare statement `%s'\n"), query);
+    GNUNET_MYSQL_statements_invalidate (plugin->mc);
+    return;
+  }
+  GNUNET_assert (proc != NULL);
+  if (mysql_stmt_execute (statement))
+  {
+    GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+                _("`%s' for `%s' failed at %s:%d with error: %s\n"),
+                "mysql_stmt_execute", query, __FILE__, __LINE__,
+                mysql_stmt_error (statement));
+    GNUNET_MYSQL_statements_invalidate (plugin->mc);
+    return;
+  }
+  memset (cbind, 0, sizeof (cbind));
+  cbind[0].buffer_type = MYSQL_TYPE_BLOB;
+  cbind[0].buffer = &key;
+  cbind[0].buffer_length = sizeof (key);
+  cbind[0].length = &length;
+  cbind[0].is_unsigned = GNUNET_NO;
+  if (mysql_stmt_bind_result (statement, cbind))
+  {
+    GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+                _("`%s' failed at %s:%d with error: %s\n"),
+                "mysql_stmt_bind_result", __FILE__, __LINE__,
+                mysql_stmt_error (statement));
+    GNUNET_MYSQL_statements_invalidate (plugin->mc);
+    return;
+  }
+  while (0 == (ret = mysql_stmt_fetch (statement)))
+  {
+    if (sizeof (struct GNUNET_HashCode) == length)
+      proc (proc_cls, &key, 1);    
+  }
+  if (ret != MYSQL_NO_DATA)
+  {
+    GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+                _("`%s' failed at %s:%d with error: %s\n"),
+                    "mysql_stmt_fetch", __FILE__, __LINE__,
+                    mysql_stmt_error (statement));    
+    GNUNET_MYSQL_statements_invalidate (plugin->mc);
+    return;
+  }
+  mysql_stmt_reset (statement);
 }
 
 
@@ -1400,17 +829,17 @@ mysql_plugin_get_replication (void *cls,
  */
 struct ExpiCtx
 {
-  
+
   /**
    * Plugin handle.
    */
   struct Plugin *plugin;
-  
+
   /**
    * Function to call for the result (or the NULL).
    */
   PluginDatumProcessor proc;
-  
+
   /**
    * Closure for proc.
    */
@@ -1440,32 +869,22 @@ struct ExpiCtx
  *         GNUNET_NO to delete the item and continue (if supported)
  */
 static int
-expi_proc (void *cls,
-          const GNUNET_HashCode *key,
-          uint32_t size,
-          const void *data,
-          enum GNUNET_BLOCK_Type type,
-          uint32_t priority,
-          uint32_t anonymity,
-          struct GNUNET_TIME_Absolute expiration, 
-          uint64_t uid)
+expi_proc (void *cls, const struct GNUNET_HashCode * key, uint32_t size,
+           const void *data, enum GNUNET_BLOCK_Type type, uint32_t priority,
+           uint32_t anonymity, struct GNUNET_TIME_Absolute expiration,
+           uint64_t uid)
 {
   struct ExpiCtx *rc = cls;
   struct Plugin *plugin = rc->plugin;
-  
+
   if (NULL == key)
-    {
-      execute_select (plugin,
-                     plugin->select_priority, 
-                     rc->proc, rc->proc_cls,
-                     -1);
-      return GNUNET_SYSERR;
-    }
-  return rc->proc (rc->proc_cls,
-                  key,
-                  size, data, 
-                  type, priority, anonymity, expiration,
-                  uid);
+  {
+    execute_select (plugin, plugin->select_priority, rc->proc, rc->proc_cls,
+                    -1);
+    return GNUNET_SYSERR;
+  }
+  return rc->proc (rc->proc_cls, key, size, data, type, priority, anonymity,
+                   expiration, uid);
 }
 
 
@@ -1478,22 +897,19 @@ expi_proc (void *cls,
  * @param proc_cls closure for proc
  */
 static void
-mysql_plugin_get_expiration (void *cls,
-                            PluginDatumProcessor proc, void *proc_cls)
+mysql_plugin_get_expiration (void *cls, PluginDatumProcessor proc,
+                             void *proc_cls)
 {
   struct Plugin *plugin = cls;
   long long nt;
   struct ExpiCtx rc;
-  
+
   rc.plugin = plugin;
   rc.proc = proc;
   rc.proc_cls = proc_cls;
-  nt = (long long) GNUNET_TIME_absolute_get().abs_value;
-  execute_select (plugin,
-                 plugin->select_expiration, 
-                 expi_proc, &rc,
-                 MYSQL_TYPE_LONGLONG, &nt, GNUNET_YES, 
-                 -1);
+  nt = (long long) GNUNET_TIME_absolute_get ().abs_value;
+  execute_select (plugin, plugin->select_expiration, expi_proc, &rc,
+                  MYSQL_TYPE_LONGLONG, &nt, GNUNET_YES, -1);
 
 }
 
@@ -1503,14 +919,13 @@ mysql_plugin_get_expiration (void *cls,
  *
  * @param cls the "struct Plugin*"
  */
-static void 
+static void
 mysql_plugin_drop (void *cls)
 {
   struct Plugin *plugin = cls;
 
-  if (GNUNET_OK != run_statement (plugin,
-                                 "DROP TABLE gn090"))
-    return;           /* error */
+  if (GNUNET_OK != GNUNET_MYSQL_statement_run (plugin->mc, "DROP TABLE gn090"))
+    return;                     /* error */
   plugin->env->duc (plugin->env->cls, 0);
 }
 
@@ -1530,64 +945,62 @@ libgnunet_plugin_datastore_mysql_init (void *cls)
 
   plugin = GNUNET_malloc (sizeof (struct Plugin));
   plugin->env = env;
-  plugin->cnffile = get_my_cnf_path (env->cfg);
-  if (GNUNET_OK != iopen (plugin))
-    {
-      iclose (plugin);
-      GNUNET_free_non_null (plugin->cnffile);
-      GNUNET_free (plugin);
-      return NULL;
-    }
-#define MRUNS(a) (GNUNET_OK != run_statement (plugin, a) )
-#define PINIT(a,b) (NULL == (a = prepared_statement_create(plugin, b)))
-  if (MRUNS ("CREATE TABLE IF NOT EXISTS gn090 ("
-             " repl INT(11) UNSIGNED NOT NULL DEFAULT 0,"
-             " type INT(11) UNSIGNED NOT NULL DEFAULT 0,"
-             " prio INT(11) UNSIGNED NOT NULL DEFAULT 0,"
-             " anonLevel INT(11) UNSIGNED NOT NULL DEFAULT 0,"
-             " expire BIGINT UNSIGNED NOT NULL DEFAULT 0,"
-             " rvalue BIGINT UNSIGNED NOT NULL,"
-             " hash BINARY(64) NOT NULL DEFAULT '',"
-             " vhash BINARY(64) NOT NULL DEFAULT '',"
-             " value BLOB NOT NULL DEFAULT '',"
-             " uid BIGINT NOT NULL AUTO_INCREMENT,"
-             " PRIMARY KEY (uid),"
-             " INDEX idx_hash (hash(64)),"
-             " INDEX idx_hash_uid (hash(64),uid),"
-             " INDEX idx_hash_vhash (hash(64),vhash(64)),"
-             " INDEX idx_hash_type_uid (hash(64),type,rvalue),"
-             " INDEX idx_prio (prio),"
-             " INDEX idx_repl_rvalue (repl,rvalue),"
-             " INDEX idx_expire (expire),"
-             " INDEX idx_anonLevel_type_rvalue (anonLevel,type,rvalue)"
-             ") ENGINE=InnoDB") ||
-      MRUNS ("SET AUTOCOMMIT = 1") ||
+  plugin->mc = GNUNET_MYSQL_context_create (env->cfg, "datastore-mysql");
+  if (NULL == plugin->mc)
+  {
+    GNUNET_free (plugin);
+    return NULL;
+  }
+#define MRUNS(a) (GNUNET_OK != GNUNET_MYSQL_statement_run (plugin->mc, a) )
+#define PINIT(a,b) (NULL == (a = GNUNET_MYSQL_statement_prepare (plugin->mc, b)))
+  if (MRUNS
+      ("CREATE TABLE IF NOT EXISTS gn090 ("
+       " repl INT(11) UNSIGNED NOT NULL DEFAULT 0,"
+       " type INT(11) UNSIGNED NOT NULL DEFAULT 0,"
+       " prio INT(11) UNSIGNED NOT NULL DEFAULT 0,"
+       " anonLevel INT(11) UNSIGNED NOT NULL DEFAULT 0,"
+       " expire BIGINT UNSIGNED NOT NULL DEFAULT 0,"
+       " rvalue BIGINT UNSIGNED NOT NULL,"
+       " hash BINARY(64) NOT NULL DEFAULT '',"
+       " vhash BINARY(64) NOT NULL DEFAULT '',"
+       " value BLOB NOT NULL DEFAULT ''," " uid BIGINT NOT NULL AUTO_INCREMENT,"
+       " PRIMARY KEY (uid)," " INDEX idx_hash (hash(64)),"
+       " INDEX idx_hash_uid (hash(64),uid),"
+       " INDEX idx_hash_vhash (hash(64),vhash(64)),"
+       " INDEX idx_hash_type_uid (hash(64),type,rvalue),"
+       " INDEX idx_prio (prio)," " INDEX idx_repl_rvalue (repl,rvalue),"
+       " INDEX idx_expire (expire),"
+       " INDEX idx_anonLevel_type_rvalue (anonLevel,type,rvalue)"
+       ") ENGINE=InnoDB") || MRUNS ("SET AUTOCOMMIT = 1") ||
       PINIT (plugin->insert_entry, INSERT_ENTRY) ||
       PINIT (plugin->delete_entry_by_uid, DELETE_ENTRY_BY_UID) ||
       PINIT (plugin->select_entry_by_hash, SELECT_ENTRY_BY_HASH) ||
-      PINIT (plugin->select_entry_by_hash_and_vhash, SELECT_ENTRY_BY_HASH_AND_VHASH)
-      || PINIT (plugin->select_entry_by_hash_and_type, SELECT_ENTRY_BY_HASH_AND_TYPE)
-      || PINIT (plugin->select_entry_by_hash_vhash_and_type,
-                SELECT_ENTRY_BY_HASH_VHASH_AND_TYPE)
-      || PINIT (plugin->count_entry_by_hash, COUNT_ENTRY_BY_HASH)
-      || PINIT (plugin->get_size, SELECT_SIZE)
-      || PINIT (plugin->count_entry_by_hash_and_vhash, COUNT_ENTRY_BY_HASH_AND_VHASH)
-      || PINIT (plugin->count_entry_by_hash_and_type, COUNT_ENTRY_BY_HASH_AND_TYPE)
+      PINIT (plugin->select_entry_by_hash_and_vhash,
+             SELECT_ENTRY_BY_HASH_AND_VHASH) ||
+      PINIT (plugin->select_entry_by_hash_and_type,
+             SELECT_ENTRY_BY_HASH_AND_TYPE) ||
+      PINIT (plugin->select_entry_by_hash_vhash_and_type,
+             SELECT_ENTRY_BY_HASH_VHASH_AND_TYPE) ||
+      PINIT (plugin->count_entry_by_hash, COUNT_ENTRY_BY_HASH) ||
+      PINIT (plugin->get_size, SELECT_SIZE) ||
+      PINIT (plugin->count_entry_by_hash_and_vhash,
+             COUNT_ENTRY_BY_HASH_AND_VHASH) ||
+      PINIT (plugin->count_entry_by_hash_and_type, COUNT_ENTRY_BY_HASH_AND_TYPE)
       || PINIT (plugin->count_entry_by_hash_vhash_and_type,
-                COUNT_ENTRY_BY_HASH_VHASH_AND_TYPE)
-      || PINIT (plugin->update_entry, UPDATE_ENTRY)
-      || PINIT (plugin->dec_repl, DEC_REPL)
-      || PINIT (plugin->zero_iter, SELECT_IT_NON_ANONYMOUS) 
-      || PINIT (plugin->select_expiration, SELECT_IT_EXPIRATION) 
-      || PINIT (plugin->select_priority, SELECT_IT_PRIORITY) 
-      || PINIT (plugin->max_repl, SELECT_MAX_REPL) 
-      || PINIT (plugin->select_replication, SELECT_IT_REPLICATION) )
-    {
-      iclose (plugin);
-      GNUNET_free_non_null (plugin->cnffile);
-      GNUNET_free (plugin);
-      return NULL;
-    }
+                COUNT_ENTRY_BY_HASH_VHASH_AND_TYPE) ||
+      PINIT (plugin->update_entry, UPDATE_ENTRY) ||
+      PINIT (plugin->dec_repl, DEC_REPL) ||
+      PINIT (plugin->zero_iter, SELECT_IT_NON_ANONYMOUS) ||
+      PINIT (plugin->select_expiration, SELECT_IT_EXPIRATION) ||
+      PINIT (plugin->select_priority, SELECT_IT_PRIORITY) ||
+      PINIT (plugin->max_repl, SELECT_MAX_REPL) ||
+      PINIT (plugin->get_all_keys, GET_ALL_KEYS) ||
+      PINIT (plugin->select_replication, SELECT_IT_REPLICATION))
+  {
+    GNUNET_MYSQL_context_destroy (plugin->mc);
+    GNUNET_free (plugin);
+    return NULL;
+  }
 #undef PINIT
 #undef MRUNS
 
@@ -1600,9 +1013,10 @@ libgnunet_plugin_datastore_mysql_init (void *cls)
   api->get_replication = &mysql_plugin_get_replication;
   api->get_expiration = &mysql_plugin_get_expiration;
   api->get_zero_anonymity = &mysql_plugin_get_zero_anonymity;
+  api->get_keys = &mysql_plugin_get_keys;
   api->drop = &mysql_plugin_drop;
-  GNUNET_log_from (GNUNET_ERROR_TYPE_INFO,
-                   "mysql", _("Mysql database running\n"));
+  GNUNET_log_from (GNUNET_ERROR_TYPE_INFO, "mysql",
+                   _("Mysql database running\n"));
   return api;
 }
 
@@ -1617,21 +1031,10 @@ libgnunet_plugin_datastore_mysql_done (void *cls)
 {
   struct GNUNET_DATASTORE_PluginFunctions *api = cls;
   struct Plugin *plugin = api->cls;
-  struct GNUNET_MysqlStatementHandle *s;
 
-  iclose (plugin);
-  while (NULL != (s = plugin->shead))
-    {
-      GNUNET_CONTAINER_DLL_remove (plugin->shead,
-                                  plugin->stail,
-                                  s);
-      GNUNET_free (s->query);
-      GNUNET_free (s);
-    }
-  GNUNET_free_non_null (plugin->cnffile);
+  GNUNET_MYSQL_context_destroy (plugin->mc);
   GNUNET_free (plugin);
   GNUNET_free (api);
-  mysql_library_end ();
   return NULL;
 }