Invalid memory panic when # is in header

[ghidinelli]

pgfutter cannot handle a "#" in the header, I suspect because Postgres doesn't support that so pgfutter should sanitize the header names or report an error on attempt. It results in a memory panic (similar to #6):

./pgfutter --table numbers --schema "foo" --host 127.0.0.1 --dbname test --pass 123 csv numbers.csv
panic: runtime error: invalid memory address or nil pointer dereference
[signal 0xb code=0x1 addr=0x0 pc=0x7d151]

goroutine 1 [running]:
database/sql.(*Stmt).Exec(0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0)
    /goroot/src/database/sql/sql.go:1302 +0x3e1
main.NewCSVImport(0xc20805d5e0, 0xc208033426, 0x6, 0xc208033450, 0x7, 0xc2080a4900, 0x9, 0x10, 0x0, 0x0, ...)
    /usr/src/pgfutter/import.go:21 +0xfd
main.importCSV(0x7fff5fbffc69, 0xc, 0xc208104070, 0x6b, 0xc208033426, 0x6, 0xc208033450, 0x7, 0x0, 0x55c470, ...)
    /usr/src/pgfutter/csv.go:127 +0x444
main.func·003(0xc20805ea00)
    /usr/src/pgfutter/pgfutter.go:165 +0x369
github.com/codegangsta/cli.Command.Run(0x380590, 0x3, 0x0, 0x0, 0x0, 0x0, 0x0, 0x3d05f0, 0x18, 0x0, ...)
    /gopath/src/github.com/codegangsta/cli/command.go:174 +0x1403
github.com/codegangsta/cli.(*App).Run(0xc20805e780, 0xc20800a000, 0xd, 0xd, 0x0, 0x0)
    /gopath/src/github.com/codegangsta/cli/app.go:187 +0x1221
main.main()
    /usr/src/pgfutter/pgfutter.go:171 +0xba4

goroutine 5 [syscall]:
os/signal.loop()
    /goroot/src/os/signal/signal_unix.go:21 +0x1f
created by os/signal.init·1
    /goroot/src/os/signal/signal_unix.go:27 +0x35

This file makes it fail:

CarNumber,fname,lname,License #,IsLicenseValid,LicenseStatus,LicenseExpires,HomeRegion,email
0,Randy,Foo,968,True,Competition,"Aug 31, 2016",SouthAtlantic,[email protected]

While this works:

CarNumber,fname,lname,LicenseNo,IsLicenseValid,LicenseStatus,LicenseExpires,HomeRegion,email
0,Randy,Foo,968,True,Competition,"Aug 31, 2016",SouthAtlantic,[email protected]

[lukasmartinelli]

Thanks for the very detailled report!
The sanitize function can replace it with "" or _.
https://github.com/lukasmartinelli/pgfutter/blob/master/postgres.go#L46-L68

I can add it but if you want you can replace it as well because it is a straightforward change.

[lukasmartinelli]

Resolved by your PR #14
Thanks a lot for the contribution. It will be in the next release.