LOAD DATA INFILE in constraints_parser has missing back-ticks

[shinguz]

LOAD DATA INFILE '/tmp/percona-data-recovery-tool-for-innodb-0.5/dumps/default/test' REPLACE INTO TABLE `test` FIELDS TERMINATED BY '\t' OPTIONALLY ENCLOSED BY '"' LINES STARTING BY 'test\t' (bla, bla, bla, drop, bla, bla);

This LOAD DATA INFILE command will create an error because drop is a key word and must be covered with backticks...