/**
* Override {@link epDbPort::checkIndex()}
* @param epClassMap $cm
* @param epDb $db
* @return false|array
*/
public function checkIndex($cm, $db)
{
// reset counter and return value
$ret = array(array(), array());
// get all columns in the pg_attribute and pg_class table
$sql = 'SELECT a.attname, a.attnum ' . ' FROM pg_attribute a, pg_class c ' . ' WHERE c.relname = ' . $db->quote($cm->getTable()) . ' AND a.attrelid = c.oid AND a.attnum > 0' . ' ORDER BY a.attnum';
// execute the query
if (!$db->execute($sql)) {
return false;
}
// array to collect all columns
$columns = array();
// go through reach record
$okay = $this->db->rsRestart();
while ($okay) {
$num = $db->rsGetCol('attnum');
$name = $db->rsGetCol('attname');
$columns[$num] = $name;
$okay = $this->db->rsNext();
}
// get all the indexes in the table (indkey has a list, space separated)
$sql = 'SELECT c2.relname AS indexname, i.indisprimary, i.indisunique, i.indkey AS indkey' . ' FROM pg_class c, pg_class c2, pg_index i' . ' WHERE c.relname = ' . $db->quote($cm->getTable()) . ' AND c.oid = i.indrelid AND i.indexrelid = c2.oid';
// execute above query
if (!$db->execute($sql)) {
return false;
}
// go through reach record
$okay = $db->rsRestart();
while ($okay) {
// skip the primary index
if ($this->db->rsGetCol('indisprimary') == 't') {
// next row
$okay = $this->db->rsNext();
continue;
}
// get index name
$name = $this->db->rsGetCol('indexname');
$unique = $this->db->rsGetCol('indisunique');
// $unique is t if unique
// $unique is f if index
$unique = $unique == 't' ? 0 : 1;
$indexes = explode(' ', $this->db->rsGetCol('indkey'));
foreach ($indexes as $index) {
$ret[$unique][$name][] = $columns[$index];
}
// next row
$okay = $db->rsNext();
}
return $ret;
}
/**
* Override {@link epDbPort::checkIndex()}
* @param epClassMap $cm
* @param epDb $db
* @return false|array
*/
public function checkIndex($cm, $db)
{
// get index list
$sql = 'PRAGMA index_list(' . $db->quoteId($cm->getTable()) . ')';
if (!$db->execute($sql)) {
return false;
}
// reset counter and return value
$ret = array(array(), array());
$indexes = array();
$uniques = array();
// go through reach record
$okay = $db->rsRestart();
while ($okay) {
// get index name
$name = $db->rsGetCol('name');
$unique = $db->rsGetCol('unique');
// $unique is 1 if unique
// $unique is 0 if index
$unique = !$unique;
// ???
// store the index name for further information
$indexes[] = $name;
$uniques[$name] = $unique;
$ret[$unique][$name] = array();
// next row
$okay = $db->rsNext();
}
// go through each index
foreach ($indexes as $index) {
$sql = 'PRAGMA index_info(' . $db->quoteId($index) . ')';
if (!$db->execute($sql)) {
return false;
}
// go through reach record
$okay = $db->rsRestart();
while ($okay) {
// get index name
$column = $db->rsGetCol('name');
$ret[$uniques[$index]][$index][] = $column;
// next row
$okay = $db->rsNext();
}
}
return $ret;
}
/**
* Executes multiple db queries
* @param string|array $sql either a single sql statement or an array of statemetns
* @return mixed
*/
protected function _execute($sql)
{
// make sql into an array
if (!is_array($sql)) {
$sql = array($sql);
}
// execute sql stmt one by one
foreach ($sql as $sql_) {
$r = $this->db->execute($sql_);
}
return $r;
}
/**
* Checks index in database table
* @param epClassMap $cm
* @param epDb $db
* @return false|array
*/
public function checkIndex($cm, $db)
{
// show all keys in the table
$sql = 'SHOW KEYS FROM ' . $db->quoteId($cm->getTable());
if (!$db->execute($sql)) {
return false;
}
// reset return array
$ret = array(array(), array());
// go through reach record
$okay = $db->rsRestart();
while ($okay) {
// get index name
$name = $db->rsGetCol('Key_name');
// skip the primary key
if ($name == 'PRIMARY') {
// next row
$okay = $db->rsNext();
continue;
}
// get the column name
$column = $db->rsGetCol('Column_name');
// get if it is unique or not
$unique = $db->rsGetCol('Non_unique');
// $unique is 1 if an index
// $unique is 0 if unique
// collect return result
$ret[$unique][$name][] = $column;
// next row
$okay = $db->rsNext();
}
return $ret;
}
/**
* Executes multiple db queries
* @param string|array $sql either a single sql statement or an array of statemetns
* @return mixed
*/
protected function _execute($sql)
{
// make sql into an array
if (!is_array($sql)) {
$sql = array($sql);
}
$r = true;
// execute sql stmt one by one
foreach ($sql as $sql_) {
// skip empty queries
if (!$sql_) {
continue;
}
$r = $this->db->execute($sql_);
}
return $r;
}
