Hi Aruna,
I think the issue is likely that you are setting /sys_create_ts but your schema
has that field as SYS_CREAT_TS (i.e., it is in upper case).
Would recommend you change the property names to /ACTV_IND and /SYS_CREAT_TS.
Also, the value that you have for /sys_creat_ts is
set to "{now()}" but I think what you really are wanting is
"${now():toNumber()}".
Also, of note, /actv_ind is set to '/Y' so I just want to clarify that the
literal value '/Y' (with the single quotes) is what will be placed there. Is
that
the intention? Or did you actually want just /Y to be there?
Thanks
-Mark
On Oct 16, 2017, at 11:41 AM, Aruna Sankaralingam
<[email protected]<mailto:[email protected]>>
wrote:
Hi,
I updated to version 1.4 now. I am using Updaterecord processor. I have
assigned values to two of the columns that are there in the target table as
shown below but I am getting the error that SYS_CREAT_TS cannot be NULL. Am I
missing something?
I have provided the screenshots of the CSVReordWriter, AVROSchemaRegistry and
my Nifi Flow below.
<image004.png> <image005.png>
CSVRecordSetWriter:
<image001.png>
AVROSchemaRegistry:
<image002.png>
<image006.png>
From: Koji Kawamura [mailto:[email protected]]
Sent: Thursday, October 12, 2017 8:28 PM
To: [email protected]<mailto:[email protected]>
Subject: Re: Transformations using Nifi
Hi Aruna,
If you can not upgrade from NiFi 1.2.0, then I think the best bed is using:
ScriptedReader or ScriptedRecordSetWriter for data conversion #1, 2 and 3.
As Russ mentioned, EL might be helpful when you implement the scripted
components.
#4 is a bit harder since it requires a database connection, but doable, I don't
know it works efficiently though..
Alternative approach would be create a temporary table, insert rows as they
are, then perform a insert/update query using the temporary table and
postgresql lookup table such as:
"insert into X select a, b, c, from T inner join L on X.j = T.j where d = ..."
Probably data conversion #1, 2, and 3 can be performed from this query as well.
Thanks,
Koji
On Thu, Oct 12, 2017 at 11:50 PM, Russell Bateman
<[email protected]<mailto:[email protected]>> wrote:
Aruna,
I don't think there is any generalized NiFi training course yet. I started
writing a book a year ago, but it's a pretty thankless task and takes a lot of
time. I mostly write custom processors so I tend to see the world differently
from most "user" users of NiFi. When I answer questions, which I don't do too
much, I often tell an impractical story that doesn't answer the question asked.
Now, I haven't done much database work at all, so I'm not going to be too much
help to you. However, looking at your questions, particularly the one about
obtaining the current date when the flow is run (#2) and also #3, I would
suggest that you study the NiFi Expression Language. This would allow you to
insert the "now" date into your flow at some point.
The other suggestions I have are to experiment, which I'm sure you're doing,
and Google hard for help. For this forum, which is filled with very nice and
helpful people, you'll tend to get a lot more and better help if you come in
with a very specific question rather than a list of things or a general, "help
me" sort of plea.
Cheers,
Russ
P.S. NiFi absolutely rocks, which you'll see as soon as you get over your
initial hump here. But, you're on the right track.
On 10/12/2017 08:16 AM, Aruna Sankaralingam wrote:
Hi,
Could you someone please help me with these requirements in the email below?
Thanks
Aruna
From: Aruna Sankaralingam [mailto:[email protected]]
Sent: Wednesday, October 11, 2017 11:26 AM
To: [email protected]<mailto:[email protected]>
Subject: Transformations using Nifi
I am trying to see what kind of transformations that can be done in nifi and
how.
Now I have a basic flow that takes CSV from the local dir and puts into s3 and
loads into postgres database.
There are 4 columns in my test file 3 of which are string and one is an integer
field. I would like to do the following before I load the data into postgres.
If someone can help me on how to go about these, it will be great.
1. Convert one of the string columns to upper case
For converting to upper case, I was told to use the Update Record processor but
my version is 1.2.0 and the update record processor is not available.
2. Postgres has an extra column called “Load_Date” in which I would like
to load the current date with timestamp when the flow is run
3. If the integer column has more than 5 digits, I would like to take
only the first 5 digits and load to the table
4. There is a look up table in postgres. I would like to check if the
first column value is present in the look up table and if yes, proceed ahead
and if not ignore the record
I am trying to learn nifi so I would really appreciate any kind of help here.
Is there any training available online that I can take in order to understand
and do all these?
<image003.png>
