Hello:
      
      I have a question on the export of sqoop(V1.4.6) need your help, the problem is as follows:
When I export HDFS file into MySQL table `test`  the `TABLE_SCHEMA` of `test` are as follows:
"bankcard"
"sex"
"HTTPStateCode"
"boolean"
"domain"
"ip"
"array"
"map"
"idcard"
"phone"
"email"
"post"
"date"
"uniform_date"
"int"
"double"
"string"
and got error like this:
ERROR [Thread-11] org.apache.sqoop.mapreduce.AsyncSqlOutputFormat: Got exception in update thread: com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near 'int, double, string) VALUES ('bankcard', 'sex', 'HTTPStateCode', 'boolean', 'dom' at line 1
	at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
	at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
	at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
	at com.mysql.jdbc.Util.handleNewInstance(Util.java:408)
	at com.mysql.jdbc.Util.getInstance(Util.java:383)
	at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:1062)
	at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:4226)
	at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:4158)
	at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:2615)
	at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:2776)
	at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2840)
	at com.mysql.jdbc.PreparedStatement.executeInternal(PreparedStatement.java:2082)
	at com.mysql.jdbc.PreparedStatement.execute(PreparedStatement.java:1302)
	at org.apache.sqoop.mapreduce.AsyncSqlOutputFormat$AsyncSqlExecThread.run(AsyncSqlOutputFormat.java:233)



1. I know the reason why the job going to false,And I want to ask if there is any way to specify the table columns like translate int to `int` & double to `double` in my case?
2. I want to edit the source code adding the escape char to column names,however, I could not find where the getColumnNamesForRawQuery is. I try to edit org.apache.sqoop.manager.SqlManager.getColumnNamesForRawQuery as shows:

        code at 152:      columns.add(colName);   -->   columns.add("`"+colName+"`");

But it did not work for me...

Hope your helps  Thanks....