error when import database

bahadori.embi said:

hi
when i want import database in phpmyadmin
this error display :

Code:

SET FOREIGN_KEY_CHECKS = ON;

MySQL said: Documentation
#2006 - MySQL server has gone away

and this warning :

Code:

Warning in ./libraries/dbi/DBIMysqli.php#257
Error while sending QUERY packet. PID=13777

Backtrace

./libraries/dbi/DBIMysqli.php#257: mysqli_query(
object,
string 'mysqldump: Error 2013: Lost connection to MySQL server during query when dumping table `filedata` at row: 47',
integer 0,
)
./libraries/DatabaseInterface.php#240: PMA\libraries\dbi\DBIMysqli->realQuery(
string 'mysqldump: Error 2013: Lost connection to MySQL server during query when dumping table `filedata` at row: 47',
object,
integer 0,
)
./libraries/import.lib.php#83: PMA\libraries\DatabaseInterface->tryQuery(string 'mysqldump: Error 2013: Lost connection to MySQL server during query when dumping table `filedata` at row: 47')
./libraries/import.lib.php#254: PMA_executeQuery(
string 'mysqldump: Error 2013: Lost connection to MySQL server during query when dumping table `filedata` at row: 47',
string 'mysqldump: Error 2013: Lost connection to MySQL server during query when dumping table `filedata` at row: 47',
array,
)
./libraries/plugins/import/ImportSql.php#170: PMA_importRunQuery(
string '',
string '',
array,
)
./import.php#635: PMA\libraries\plugins\import\ImportSql->doImport(array)

database size : 20MB
how to resolved the problem?

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