vertica copy command with based on the content of the csv - vertica

Question

I'm trying to run copy command that populate the db based on concatination of the csv.
db columns names are:
col1,col2,col3
csv content is (just the numbers, names are the db column names):
1234,5678,5436
what i need is a way to insert data say like this:
based on my example:
i want to put in the db:
col1, col2, col3
1234, 5678 "1234_XX_5678"
should i use FILLERS?
if so what is the command?
my starting point is:
COPY SAMPLE.MYTABLE (col1,col2,col3)
FROM LOCAL
'c:\\1\\test.CSV'
UNCOMPRESSED DELIMITER ',' NULL AS 'NULL' ESCAPE AS '\' RECORD TERMINATOR '
' ENCLOSED BY '"' DIRECT STREAM NAME 'Identifier_0' EXCEPTIONS 'c:\\1\\test.exceptions'
REJECTED DATA 'c:\\1\\test.rejections' ABORT ON ERROR NO COMMIT;
can you help how to load those columns (basically col3)
thanks

Answer 1

There different ways to do this.
1 - Pipe the data into vsql and do the data edit on the fly using linux
Eg:
cat file.csv |sed 's/,/ , /g' | awk {'print $1 $2 $3 $4 $1"_XX_"$3'}
|vsql -U user -w passwd -d dbname -c "COPY tbl FROM STDIN DELIMITER ',';"
2 - Use Fillers
copy tbl(
v1 filler int ,
v2 filler int ,
v3 filler int,
col1 as v1,
col2 as v2,
col3 as v1||'_XX_'||v2) from '/tmp/file.csv' delimiter ',' direct;
dbadmin=> select * from tbl;
col1 | col2 | col3
------+------+--------------
1234 | 5678 | 1234_XX_5678
(1 row)
I hope this helps :)

Answer 2

You don't even have to make the two input columns - which you load as-is anyway - FILLERs. This will do:
COPY mytable (
col1
, col2
, col3f FILLER int
, col3 AS col1::CHAR(4)||'_XX_'||col2::CHAR(4)
)
FROM LOCAL 'foo.txt'
DELIMITER ','