maxdb_rollback(3) [php man page]

MAXDB_ROLLBACK(3)							 1							 MAXDB_ROLLBACK(3)

maxdb_rollback - Rolls back current transaction

       Procedural style

SYNOPSIS

       bool maxdb_rollback (resource  $link)

DESCRIPTION

       Object oriented style
       bool maxdb::rollback (void  )

	Rollbacks the current transaction for the database specified by the $link parameter.

RETURN VALUES

	Returns TRUE on success or FALSE on failure.

EXAMPLES

       Example #1

	      Object oriented style

	      <?php
	      $maxdb = new maxdb("localhost", "MONA", "RED", "DEMODB");

	      /* check connection */
	      if (maxdb_connect_errno()) {
		 printf("Connect failed: %s
", maxdb_connect_error());
		 exit();
	      }

	      /* disable autocommit */
	      $maxdb->autocommit(FALSE);

	      $maxdb->query("CREATE TABLE temp.mycity LIKE hotel.city");
	      $maxdb->query("INSERT INTO temp.mycity SELECT * FROM hotel.city");

	      /* commit insert */
	      $maxdb->commit();

	      /* delete all rows */
	      $maxdb->query("DELETE FROM temp.mycity");

	      if ($result = $maxdb->query("SELECT COUNT(*) FROM temp.mycity")) {
		 $row = $result->fetch_row();
		 printf("%d rows in table mycity.
", $row[0]);
		 /* Free result */
		 $result->close();
	      }

	      /* Rollback */
	      $maxdb->rollback();

	      if ($result = $maxdb->query("SELECT COUNT(*) FROM temp.mycity")) {
		 $row = $result->fetch_row();
		 printf("%d rows in table mycity (after rollback).
", $row[0]);
		 /* Free result */
		 $result->close();
	      }

	      /* Drop table myCity */
	      $maxdb->query("DROP TABLE temp.mycity");

	      $maxdb->close();
	      ?>

       Example #2

	      Procedural style

	      <?php
	      $link = maxdb_connect("localhost", "MONA", "RED", "DEMODB");

	      /* check connection */
	      if (maxdb_connect_errno()) {
		 printf("Connect failed: %s
", maxdb_connect_error());
		 exit();
	      }

	      /* disable autocommit */
	      maxdb_autocommit($link, FALSE);

	      maxdb_query($link, "CREATE TABLE temp.mycity LIKE hotel.city");
	      maxdb_query($link, "INSERT INTO temp.mycity SELECT * FROM hotel.city");

	      /* commit insert */
	      maxdb_commit($link);

	      /* delete all rows */
	      maxdb_query($link, "DELETE FROM temp.mycity");

	      if ($result = maxdb_query($link, "SELECT COUNT(*) FROM temp.mycity")) {
		 $row = maxdb_fetch_row($result);
		 printf("%d rows in table mycity.
", $row[0]);
		 /* Free result */
		 maxdb_free_result($result);
	      }

	      /* Rollback */
	      maxdb_rollback($link);

	      if ($result = maxdb_query($link, "SELECT COUNT(*) FROM temp.mycity")) {
		 $row = maxdb_fetch_row($result);
		 printf("%d rows in table mycity (after rollback).
", $row[0]);
		 /* Free result */
		 maxdb_free_result($result);
	      }

	      /* Drop table myCity */
	      maxdb_query($link, "DROP TABLE temp.mycity");

	      maxdb_close($link);
	      ?>

       The above example will output something similar to:

       0 rows in table mycity.
       25 rows in table mycity (after rollback).

SEE ALSO

       maxdb_commit(3), maxdb_autocommit(3).

PHP Documentation Group 													 MAXDB_ROLLBACK(3)

Check Out this Related Man Page

MAXDB_QUERY(3)								 1							    MAXDB_QUERY(3)

maxdb_query - Performs a query on the database

       Procedural style

SYNOPSIS

       mixed maxdb_query (resource  $link, string  $query, [int  $resultmode])

DESCRIPTION

       Object oriented style
       mixed maxdb::query (string  $query)

	The maxdb_query(3) function is used to simplify the act of performing a query against the database represented by the $link parameter.

RETURN VALUES

	Returns TRUE on success or FALSE on failure. For SELECT, SHOW, DESCRIBE or EXPLAINmaxdb_query(3) will return a result resource.

EXAMPLES

       Example #1

	      Object oriented style

	      <?php
	      $maxdb = new maxdb("localhost", "MONA", "RED", "DEMODB");

	      /* check connection */
	      if (maxdb_connect_errno()) {
		 printf("Connect failed: %s
", maxdb_connect_error());
		 exit();
	      }

	      /* Create table doesn't return a resultset */
	      if ($maxdb->query("CREATE TABLE temp.mycity LIKE hotel.city") === TRUE) {
		 printf("Table mycity successfully created.
");
	      }

	      /* Select queries return a resultset */
	      if ($result = $maxdb->query("SELECT name FROM hotel.city")) {
		 printf("Select returned %d rows.
", $result->num_rows);

		 /* free result set */
		 $result->close();
	      }

	      /* If we have to retrieve large amount of data we use MAXDB_USE_RESULT */
	      if ($result = $maxdb->query("SELECT * FROM hotel.city", MAXDB_USE_RESULT)) {
		 $result->close();
	      }

	      $maxdb->close();
	      ?>

       Example #2

	      Procedural style

	      <?php
	      $link = maxdb_connect("localhost", "MONA", "RED", "DEMODB");

	      /* check connection */
	      if (maxdb_connect_errno()) {
		 printf("Connect failed: %s
", maxdb_connect_error());
		 exit();
	      }

	      /* Create table doesn't return a resultset */
	      if (maxdb_query($link, "CREATE TABLE temp.mycity LIKE hotel.city") === TRUE) {
		 printf("Table mycity successfully created.
");
	      }

	      /* Select queries return a resultset */
	      if ($result = maxdb_query($link, "SELECT name FROM hotel.city")) {
		 printf("Select returned %d rows.
", maxdb_num_rows($result));

		 /* free result set */
		 maxdb_free_result($result);
	      }

	      /* If we have to retrieve large amount of data we use MAXDB_USE_RESULT */
	      if ($result = maxdb_query($link, "SELECT * FROM hotel.city", MAXDB_USE_RESULT)) {
		 maxdb_free_result($result);
	      }

	      maxdb_close($link);
	      ?>

       The above example will output something similar to:

       Table mycity successfully created.
       Select returned 25 rows.

SEE ALSO

       maxdb_real_query(3), maxdb_multi_query(3), maxdb_free_result(3).

PHP Documentation Group 													    MAXDB_QUERY(3)

Linux and UNIX Man Pages

maxdb_rollback(3) [php man page]

Check Out this Related Man Page