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'); exit; } // Restore error tracking setting ini_set('track_errors', $track_errors_previous); return $connection; } /** * Helper function for db_query(). */ function _db_query($query, $debug = 0) { global $active_db, $last_result, $queries; if (variable_get('dev_query', 0)) { list($usec, $sec) = explode(' ', microtime()); $timer = (float)$usec + (float)$sec; } $last_result = pg_query($active_db, $query); if (variable_get('dev_query', 0)) { list($usec, $sec) = explode(' ', microtime()); $stop = (float)$usec + (float)$sec; $diff = $stop - $timer; $queries[] = array($query, $diff); } if ($debug) { print '

query: '. $query .'
error:'. pg_last_error() .'

'; } if ($last_result !== FALSE) { return $last_result; } else { trigger_error(pg_last_error() ."\nquery: ". htmlspecialchars($query), E_USER_ERROR); return FALSE; } } /** * Fetch one result row from the previous query as an object. * * @param $result * A database query result resource, as returned from db_query(). * @return * An object representing the next row of the result. The attributes of this * object are the table fields selected by the query. */ function db_fetch_object($result) { if ($result) { return pg_fetch_object($result); } } /** * Fetch one result row from the previous query as an array. * * @param $result * A database query result resource, as returned from db_query(). * @return * An associative array representing the next row of the result. The keys of * this object are the names of the table fields selected by the query, and * the values are the field values for this result row. */ function db_fetch_array($result) { if ($result) { return pg_fetch_assoc($result); } } /** * Determine how many result rows were found by the preceding query. * * @param $result * A database query result resource, as returned from db_query(). * @return * The number of result rows. */ function db_num_rows($result) { if ($result) { return pg_num_rows($result); } } /** * Return an individual result field from the previous query. * * Only use this function if exactly one field is being selected; otherwise, * use db_fetch_object() or db_fetch_array(). * * @param $result * A database query result resource, as returned from db_query(). * @param $row * The index of the row whose result is needed. * @return * The resulting field. */ function db_result($result, $row = 0) { if ($result && pg_num_rows($result) > $row) { $res = pg_fetch_row($result, $row); return $res[0]; } } /** * Determine whether the previous query caused an error. */ function db_error() { return pg_last_error(); } /** * Return a new unique ID in the given sequence. * * For compatibility reasons, Drupal does not use auto-numbered fields in its * database tables. Instead, this function is used to return a new unique ID * of the type requested. If necessary, a new sequence with the given name * will be created. */ function db_next_id($name) { $id = db_result(db_query("SELECT nextval('%s_seq')", db_prefix_tables($name))); return $id; } /** * Determine the number of rows changed by the preceding query. */ function db_affected_rows() { global $last_result; return pg_affected_rows($last_result); } /** * Runs a limited-range query in the active database. * * Use this as a substitute for db_query() when a subset of the query is to be * returned. * User-supplied arguments to the query should be passed in as separate parameters * so that they can be properly escaped to avoid SQL injection attacks. * * @param $query * A string containing an SQL query. * @param ... * A variable number of arguments which are substituted into the query using * printf() syntax. Instead of a variable number of query arguments, you may * also pass a single array containing the query arguments. * @param $from * The first result row to return. * @param $count * The maximum number of result rows to return. * @return * A database query result resource, or FALSE if the query was not executed * correctly. */ function db_query_range($query) { $args = func_get_args(); $count = array_pop($args); $from = array_pop($args); $query = db_prefix_tables($query); if (count($args) > 1) { // Check for array (alternative syntax). if (is_array($args[1])) { $args = array_merge(array($query), $args[1]); } $args = array_map('db_escape_string', $args); $args[0] = $query; $query = call_user_func_array('sprintf', $args); } $query .= ' LIMIT '. $count .' OFFSET '. $from; return _db_query($query); } /** * Returns a properly formatted Binary Large OBject value. * * @param $data * Data to encode. * @return * Encoded data. */ function db_encode_blob($data) { return addcslashes($data, "\0..\37\\"); } /** * Returns text from a Binary Large OBject value. * * @param $data * Data to decode. * @return * Decoded data. */ function db_decode_blob($data) { return stripcslashes($data); } /** * Prepare user input for use in a database query, preventing SQL injection attacks. * Note: This function requires PostgreSQL 7.2 or later. */ function db_escape_string($text) { return pg_escape_string($text); } /** * Lock a table. * This function automatically starts a transaction. */ function db_lock_table($table) { db_query('BEGIN; LOCK TABLE {%s} IN EXCLUSIVE MODE', $table); } /** * Unlock all locked tables. * This function automatically commits a transation. */ function db_unlock_tables() { db_query('COMMIT'); } /** * @} End of "ingroup database". */