public function DatabaseStatementPrefetch::fetchCol
public DatabaseStatementPrefetch::fetchCol($index = 0)
Returns an entire single column of a result set as an indexed array.
Note that this method will run the result set to the end.
Parameters
$index: The index of the column number to fetch.
Return value
An indexed array, or an empty array if there is no result set.
Overrides DatabaseStatementInterface::fetchCol
File
- includes/database/prefetch.inc, line 449
- Database interface code for engines that need complete control over their result sets. For example, SQLite will prefix some column names by the name of the table. We post-process the data, by renaming the column names using the same convention as…
Class
- DatabaseStatementPrefetch
- An implementation of DatabaseStatementInterface that prefetches all data.
Code
public function fetchCol($index = 0) { if (isset($this->columnNames[$index])) { $column = $this->columnNames[$index]; $result = array(); // Traverse the array as PHP would have done. while (isset($this->currentRow)) { $result[] = $this->currentRow[$this->columnNames[$index]]; $this->next(); } return $result; } else { return array(); } }
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https://api.drupal.org/api/drupal/includes!database!prefetch.inc/function/DatabaseStatementPrefetch::fetchCol/7.x