diff --git a/htdocs/sql/libraries/get_foreign.lib.php b/htdocs/sql/libraries/get_foreign.lib.php new file mode 100755 --- /dev/null +++ b/htdocs/sql/libraries/get_foreign.lib.php @@ -0,0 +1,83 @@ + + */ + + +// lem9: we always show the foreign field in the drop-down; if a display +// field is defined, we show it besides the foreign field +$foreign_link = false; +if ($foreigners && isset($foreigners[$field])) { + $foreigner = $foreigners[$field]; + $foreign_db = $foreigner['foreign_db']; + $foreign_table = $foreigner['foreign_table']; + $foreign_field = $foreigner['foreign_field']; + + // Count number of rows in the foreign table. Currently we do + // not use a drop-down if more than 200 rows in the foreign table, + // for speed reasons and because we need a better interface for this. + // + // We could also do the SELECT anyway, with a LIMIT, and ensure that + // the current value of the field is one of the choices. + + $the_total = PMA_Table::countRecords($foreign_db, $foreign_table, TRUE); + + if ((isset($override_total) && $override_total == true) || $the_total < $cfg['ForeignKeyMaxLimit']) { + // foreign_display can be FALSE if no display field defined: + $foreign_display = PMA_getDisplayField($foreign_db, $foreign_table); + + $f_query_main = 'SELECT ' . PMA_backquote($foreign_field) + . (($foreign_display == FALSE) ? '' : ', ' . PMA_backquote($foreign_display)); + $f_query_from = ' FROM ' . PMA_backquote($foreign_db) . '.' . PMA_backquote($foreign_table); + $f_query_filter = empty($foreign_filter) ? '' : ' WHERE ' . PMA_backquote($foreign_field) + . ' LIKE "%' . PMA_sqlAddslashes($foreign_filter, TRUE) . '%"' + . (($foreign_display == FALSE) ? '' : ' OR ' . PMA_backquote($foreign_display) + . ' LIKE "%' . PMA_sqlAddslashes($foreign_filter, TRUE) . '%"' + ); + $f_query_order = ($foreign_display == FALSE) ? '' :' ORDER BY ' . PMA_backquote($foreign_table) . '.' . PMA_backquote($foreign_display); + $f_query_limit = isset($foreign_limit) ? $foreign_limit : ''; + + if (!empty($foreign_filter)) { + $res = PMA_DBI_query('SELECT COUNT(*)' . $f_query_from . $f_query_filter); + if ($res) { + $the_total = PMA_DBI_fetch_value($res); + @PMA_DBI_free_result($res); + } else { + $the_total = 0; + } + } + + $disp = PMA_DBI_query($f_query_main . $f_query_from . $f_query_filter . $f_query_order . $f_query_limit); + if ($disp && PMA_DBI_num_rows($disp) > 0) { + // garvin: If a resultset has been created, pre-cache it in the $disp_row array + // This helps us from not needing to use mysql_data_seek by accessing a pre-cached + // PHP array. Usually those resultsets are not that big, so a performance hit should + // not be expected. + $disp_row = array(); + while ($single_disp_row = @PMA_DBI_fetch_assoc($disp)) { + $disp_row[] = $single_disp_row; + } + @PMA_DBI_free_result($disp); + } + } else { + unset($disp_row); + $foreign_link = true; + } +} // end if $foreigners + +?>