QSqlQuery does not execute

[Lykurg]

...beside escaping your string proper. I bet it must be

mQuery.exec("LOAD DATA INFILE '"+fileName+"' INTO TABLE table1 FIELDS  TERMINATED BY ' ' LINES TERMINATED BY '\\r\\n'")

mQuery.exec("LOAD DATA INFILE '"+fileName+"' INTO TABLE table1 FIELDS  TERMINATED BY ' ' LINES TERMINATED BY '\\r\\n'")

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Also have a look at bindValue or QString::arg() which makes your code better readable.