INSERT IGNORE using Codeigniter

Question

I am trying to insert a few rows into the MySQL table using Codeigniter and Active Records.

PHP Code

$data = array(\'......\');  //          


        

Answer 1

Not highly recommended but here is a hack to preserve the batch insert (which is more efficient wrt Mysql)

// try to insert as usual first
$this->db->insert_batch('my_table', $data);

// if it fails resort to IGNORE
if($this->db->_error_message())
{
        $sql = $this->db->last_query();
        $sql = str_replace('INSERT INTO', 'INSERT IGNORE INTO', $sql);
        $this->db->query($sql);
}

Answer 2

For batch uploads you might need something more like:

foreach ($data as $data_item) {
    $insert_query = $this->db->insert_string('my_table', $data_item);
    $insert_query = str_replace('INSERT INTO', 'INSERT IGNORE INTO', $insert_query);
    $this->db->query($insert_query);
}

UPDATE: Use dcostalis's version (in the comments below this one), it will scale much better :-)

Answer 3

For this purpose i made this helper function:

function insert_batch_string($table='',$data=[],$ignore=false){
    $CI = &get_instance();
    $sql = '';

    if ($table && !empty($data)){
        $rows = [];

        foreach ($data as $row) {
            $insert_string = $CI->db->insert_string($table,$row);
            if(empty($rows) && $sql ==''){
                $sql = substr($insert_string,0,stripos($insert_string,'VALUES'));
            }
            $rows[] = trim(substr($insert_string,stripos($insert_string,'VALUES')+6));
        }

        $sql.=' VALUES '.implode(',',$rows);

        if ($ignore) $sql = str_ireplace('INSERT INTO', 'INSERT IGNORE INTO', $sql);
    }
    return $sql;
}

It can do batch insert and batch insert with ignore. To avoid duplicate rows you must set a unique key in the database table for a primary field.

Answer 4

Using the technique of your second idea, you could generate a query by looping over the array and using:

$this->db->query($query_string);

Answer 5

Don't use insert_batch, as it actually runs the query. You want insert_string

$insert_query = $this->db->insert_string('my_table', $data);
$insert_query = str_replace('INSERT INTO','INSERT IGNORE INTO',$insert_query);
$this->db->query($insert_query);

UPDATE: This doesn't work for batch queries, only one row at a time.

Answer 6

If still someone is struggling with insert_batch to use ignore,

Check this path,

system/database/DB_query_builder.php

Search for function

protected function _insert_batch

Change

INSERT INTO => INSERT IGNORE INTO

Thank me later. :)