| public static getUniqueCondition ( resource $handle, integer $fields_cnt, array $fields_meta, array $row, boolean $force_unique = false, string | boolean $restrict_to_table = false, array $analyzed_sql_results = null ) : array | ||
| $handle | resource | current query result |
| $fields_cnt | integer | number of fields |
| $fields_meta | array | meta information about fields |
| $row | array | current row |
| $force_unique | boolean | generate condition only on pk or unique |
| $restrict_to_table | string | boolean | restrict the unique condition to this table or false if none |
| $analyzed_sql_results | array | the analyzed query |
| return | array | the calculated condition and whether condition is unique |
public static function getUniqueCondition($handle, $fields_cnt, $fields_meta, $row, $force_unique = false, $restrict_to_table = false, $analyzed_sql_results = null)
{
$primary_key = '';
$unique_key = '';
$nonprimary_condition = '';
$preferred_condition = '';
$primary_key_array = array();
$unique_key_array = array();
$nonprimary_condition_array = array();
$condition_array = array();
for ($i = 0; $i < $fields_cnt; ++$i) {
$con_val = '';
$field_flags = $GLOBALS['dbi']->fieldFlags($handle, $i);
$meta = $fields_meta[$i];
// do not use a column alias in a condition
if (!isset($meta->orgname) || strlen($meta->orgname) === 0) {
$meta->orgname = $meta->name;
if (!empty($analyzed_sql_results['statement']->expr)) {
foreach ($analyzed_sql_results['statement']->expr as $expr) {
if (empty($expr->alias) || empty($expr->column)) {
continue;
}
if (strcasecmp($meta->name, $expr->alias) == 0) {
$meta->orgname = $expr->column;
break;
}
}
}
}
// Do not use a table alias in a condition.
// Test case is:
// select * from galerie x WHERE
//(select count(*) from galerie y where y.datum=x.datum)>1
//
// But orgtable is present only with mysqli extension so the
// fix is only for mysqli.
// Also, do not use the original table name if we are dealing with
// a view because this view might be updatable.
// (The isView() verification should not be costly in most cases
// because there is some caching in the function).
if (isset($meta->orgtable) && $meta->table != $meta->orgtable && !$GLOBALS['dbi']->getTable($GLOBALS['db'], $meta->table)->isView()) {
$meta->table = $meta->orgtable;
}
// If this field is not from the table which the unique clause needs
// to be restricted to.
if ($restrict_to_table && $restrict_to_table != $meta->table) {
continue;
}
// to fix the bug where float fields (primary or not)
// can't be matched because of the imprecision of
// floating comparison, use CONCAT
// (also, the syntax "CONCAT(field) IS NULL"
// that we need on the next "if" will work)
if ($meta->type == 'real') {
$con_key = 'CONCAT(' . self::backquote($meta->table) . '.' . self::backquote($meta->orgname) . ')';
} else {
$con_key = self::backquote($meta->table) . '.' . self::backquote($meta->orgname);
}
// end if... else...
$condition = ' ' . $con_key . ' ';
if (!isset($row[$i]) || is_null($row[$i])) {
$con_val = 'IS NULL';
} else {
// timestamp is numeric on some MySQL 4.1
// for real we use CONCAT above and it should compare to string
if ($meta->numeric && $meta->type != 'timestamp' && $meta->type != 'real') {
$con_val = '= ' . $row[$i];
} elseif (($meta->type == 'blob' || $meta->type == 'string') && stristr($field_flags, 'BINARY') && !empty($row[$i])) {
// hexify only if this is a true not empty BLOB or a BINARY
// do not waste memory building a too big condition
if (mb_strlen($row[$i]) < 1000) {
// use a CAST if possible, to avoid problems
// if the field contains wildcard characters % or _
$con_val = '= CAST(0x' . bin2hex($row[$i]) . ' AS BINARY)';
} elseif ($fields_cnt == 1) {
// when this blob is the only field present
// try settling with length comparison
$condition = ' CHAR_LENGTH(' . $con_key . ') ';
$con_val = ' = ' . mb_strlen($row[$i]);
} else {
// this blob won't be part of the final condition
$con_val = null;
}
} elseif (in_array($meta->type, self::getGISDatatypes()) && !empty($row[$i])) {
// do not build a too big condition
if (mb_strlen($row[$i]) < 5000) {
$condition .= '=0x' . bin2hex($row[$i]) . ' AND';
} else {
$condition = '';
}
} elseif ($meta->type == 'bit') {
$con_val = "= b'" . self::printableBitValue($row[$i], $meta->length) . "'";
} else {
$con_val = '= \'' . $GLOBALS['dbi']->escapeString($row[$i]) . '\'';
}
}
if ($con_val != null) {
$condition .= $con_val . ' AND';
if ($meta->primary_key > 0) {
$primary_key .= $condition;
$primary_key_array[$con_key] = $con_val;
} elseif ($meta->unique_key > 0) {
$unique_key .= $condition;
$unique_key_array[$con_key] = $con_val;
}
$nonprimary_condition .= $condition;
$nonprimary_condition_array[$con_key] = $con_val;
}
}
// end for
// Correction University of Virginia 19991216:
// prefer primary or unique keys for condition,
// but use conjunction of all values if no primary key
$clause_is_unique = true;
if ($primary_key) {
$preferred_condition = $primary_key;
$condition_array = $primary_key_array;
} elseif ($unique_key) {
$preferred_condition = $unique_key;
$condition_array = $unique_key_array;
} elseif (!$force_unique) {
$preferred_condition = $nonprimary_condition;
$condition_array = $nonprimary_condition_array;
$clause_is_unique = false;
}
$where_clause = trim(preg_replace('|\\s?AND$|', '', $preferred_condition));
return array($where_clause, $clause_is_unique, $condition_array);
} /**
* Zoom submit action
*
* @param string $dataLabel Data label
* @param string $goto Goto
*
* @return void
*/
public function zoomSubmitAction($dataLabel, $goto)
{
//Query generation part
$sql_query = $this->_buildSqlQuery();
$sql_query .= ' LIMIT ' . $_POST['maxPlotLimit'];
//Query execution part
$result = $this->dbi->query($sql_query . ";", null, DatabaseInterface::QUERY_STORE);
$fields_meta = $this->dbi->getFieldsMeta($result);
$data = array();
while ($row = $this->dbi->fetchAssoc($result)) {
//Need a row with indexes as 0,1,2 for the getUniqueCondition
// hence using a temporary array
$tmpRow = array();
foreach ($row as $val) {
$tmpRow[] = $val;
}
//Get unique condition on each row (will be needed for row update)
$uniqueCondition = Util::getUniqueCondition($result, count($this->_columnNames), $fields_meta, $tmpRow, true, false, null);
//Append it to row array as where_clause
$row['where_clause'] = $uniqueCondition[0];
$tmpData = array($_POST['criteriaColumnNames'][0] => $row[$_POST['criteriaColumnNames'][0]], $_POST['criteriaColumnNames'][1] => $row[$_POST['criteriaColumnNames'][1]], 'where_clause' => $uniqueCondition[0]);
$tmpData[$dataLabel] = $dataLabel ? $row[$dataLabel] : '';
$data[] = $tmpData;
}
unset($tmpData);
//Displays form for point data and scatter plot
$titles = array('Browse' => Util::getIcon('b_browse.png', __('Browse foreign values')));
$this->response->addHTML(Template::get('table/search/zoom_result_form')->render(array('_db' => $this->db, '_table' => $this->table, '_columnNames' => $this->_columnNames, '_foreigners' => $this->_foreigners, '_columnNullFlags' => $this->_columnNullFlags, '_columnTypes' => $this->_columnTypes, 'titles' => $titles, 'goto' => $goto, 'data' => $data)));
}
