Changes
Title
unchanged
Yii v2 snippet guide III
Category
unchanged
Tutorials
Yii version
unchanged
2.0
Tags
unchanged
tutorial,yii2,beginer
Content
changed
[...]
- "ODBC Data Sources 64-bit"
- (Just hit the Win-key and type "ODBC")
Open the one you need, go to tab "System DSN" and click "Add". You will see what drivers are available - **only these drivers can be used in the DSN String!!**
If only "SQL Server" is present, then you need to install the Access Engine (or MS Access) with drivers for your platform. You need driver named cca "Microsoft Access Driver (\*.mdb,
\*.accdb)"
In my case the Engine added following 64bit drivers:
- Microsoft Access dBASE Driver (\*.dbf, \*.ndx, \*.mdx)
- Microsoft Access Driver (\*.mdb, \*.accdb)
- Microsoft Access Text Driver (\*.txt, \*.csv)
- Microsoft Excel Driver (\*.xls, \*.xlsx, \*.xlsm, \*.xlsb)
**And how about Linux ?**
You need the MS Access Drivers as well, but Microsoft does not provide them. There are some 3rd party [MdbTools](https://github.com/mdbtools/mdbtools) or [EasySoft](https://www.easysoft.com/products/data_access/odbc-access-driver/index.html#section=tab-1), but their are either not-perfect or expensive. Plus there is [Unix ODBC](http://www.unixodbc.org/).
For Java there are [Java JDBC](http://www.hxtt.com/access.html), [Jackcess](https://jackcess.sourceforge.io/) and [Ucanaccess](http://ucanaccess.sourceforge.net/site.html).
**And how about Docker ?**
As far as I know you cannot run Windows images under Linux so you will not be able to use the ODBC-advantage of Windows in this case.
You can use Linux images under Windows, but I think there is no way how to access the ODBC drivers from virtual Linux. You would have to try it, I haven't tested it yet.
**Migration batch insert csv**
---
If you want to import CSV into your DB in Yii2 migrations, you can create this "migration base class" and use it as a parent of your actual migration. Then you can use method batchInsertCsv().
```php
<?php
namespace app\components;
use yii\db\Migration;
class BaseMigration extends Migration
{
/**
* @param $filename Example: DIR_ROOT . DIRECTORY_SEPARATOR . "file.csv"
* @param $table The target table name
* @param $csvToSqlColMapping [csvColName => sqlColName] (if $containsHeaderRow = true) or [csvColIndex => sqlColName] (if $containsHeaderRow = false)
* @param bool $containsHeaderRow If the header with CSV col names is present
* @param int $batchSize How many rows will be inserted in each batch
* @throws Exception
*/
public function batchInsertCsv($filename, $table, $csvToSqlColMapping, $containsHeaderRow = false, $batchSize = 10000, $separator = ';')
{
if (!file_exists($filename)) {
throw new \Exception("File " . $filename . " not found");
}
// If you see number 1 in first inserted row and column, most likely BOM causes this.
// Some Textfiles begin with 239 187 191 (EF BB BF in hex)
// bite order mark https://en.wikipedia.org/wiki/Byte_order_mark
// Let's trim it on the first row.
$bom = pack('H*', 'EFBBBF');
$handle = fopen($filename, "r");
$lineNumber = 1;
$header = [];
$rows = [];
$sqlColNames = array_values($csvToSqlColMapping);
$batch = 0;
if ($containsHeaderRow) {
if (($raw_string = fgets($handle)) !== false) {
$header = str_getcsv(trim($raw_string, $bom), $separator);
}
}
// Iterate over every line of the file
while (($raw_string = fgets($handle)) !== false) {
$dataArray = str_getcsv(trim($raw_string, $bom), $separator);
if ($containsHeaderRow) {
$dataArray = array_combine($header, $dataArray);
}
$tmp = [];
foreach ($csvToSqlColMapping as $csvCol => $sqlCol) {
$tmp[] = trim($dataArray[$csvCol]);
}
$rows[] = $tmp;
$lineNumber++;
$batch++;
if ($batch >= $batchSize) {
$this->batchInsert($table, $sqlColNames, $rows);
$rows = [];
$batch = 0;
}
}
fclose($handle);
$this->batchInsert($table, $sqlColNames, $rows);
}
}
```