How do I use get_compiled_select or count_all_results before running the query without getting the table name added twice? When I use $this->db->get('tblProgram') after either of those, I get the error:
Code:
Not unique table/alias: 'tblProgram'
SELECT * FROM (`tblProgram`, `tblProgram`) JOIN `tblPlots` ON `tblPlots`.`programID`=`tblProgram`.`pkProgramID` JOIN `tblTrees` ON `tblTrees`.`treePlotID`=`tblPlots`.`id` ORDER BY `tblTrees`.`id` ASC LIMIT 2000
Here is my code:
Code:
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public function get_download_tree_data($options=array(), $rand=""){
//join tables and order by tree id
$this->db->reset_query();
$this->db->join('tblPlots','tblPlots.programID=tblProgram.pkProgramID');
$this->db->join('tblTrees','tblTrees.treePlotID=tblPlots.id');
$this->db->order_by('tblTrees.id', 'ASC');
//get number of results to return
$allResults=$this->db->count_all_results('tblProgram', false);
//chunk data and write to CSV to avoid reaching memory limit
$offset=0;
$chunk=2000;
$treePath=$this->config->item('temp_path')."$rand/trees.csv";
$tree_handle=fopen($treePath,'a');
while (($offset<$allResults)) {
$this->db->limit($chunk, $offset);
$result=$this->db->get('tblProgram')->result_array();
foreach ($result as $row) {
fputcsv($tree_handle, $row);
}
$offset=$offset+$chunk;
}
fclose($tree_handle);
return array('resultCount'=>$allResults);
}
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