How to Define "BLOB" dataType of SQL in Appian CDT

RE: How to Define "BLOB" dataType of SQL in Appian CDT

Pramod Kumar Reddy Uppula — Tue, 30 Jul 2019 14:07:46 GMT

Hi All,

We are storing the documents uploaded in an external database and the documents are no where stored in Appian. I need to retrieve the documents from external DB and display them in appian interface. For this, I am using "Receive file from RDBMS BLOB". Can anyone help me in configuring this node.

RE: How to Define "BLOB" dataType of SQL in Appian CDT

Stefan Helzle — Sat, 03 Sep 2016 11:40:44 GMT

OK, thanks.

RE: How to Define "BLOB" dataType of SQL in Appian CDT

mohammedz — Sat, 03 Sep 2016 07:29:22 GMT

We need to fetch Bin Doc from external DB, as it is stored der in BLOB Format ...

RE: How to Define "BLOB" dataType of SQL in Appian CDT

Stefan Helzle — Fri, 02 Sep 2016 16:46:44 GMT

OK. Great it works now. Just one question. Why do you store binary documents in DB?

RE: How to Define "BLOB" dataType of SQL in Appian CDT

mohammedz — Fri, 02 Sep 2016 16:15:06 GMT

I declared three columns and passed two values ... Silly mistake ..human error lolzz

RE: How to Define "BLOB" dataType of SQL in Appian CDT

Stefan Helzle — Fri, 02 Sep 2016 14:25:31 GMT

What was the problem?

RE: How to Define "BLOB" dataType of SQL in Appian CDT

mohammedz — Fri, 02 Sep 2016 13:23:56 GMT

@stefan
Never mind ....!!
I fixed the issue .. Thanks again for your valuable thoughts ...!!!

RE: How to Define "BLOB" dataType of SQL in Appian CDT

mohammedz — Fri, 02 Sep 2016 13:14:45 GMT

For sending the doc as BLOB i am using insert query. I have tried multiple combination but still I am getting the below error

java.sql.SQLSyntaxErrorException: ORA-00947: not enough values

Got to know the error why this is happening as we are passing (?) it is throwing ORA Error

@stefan
Any thought like how can we overcome this ....?? Eager to know your thought so that it would be helpful for me to proceed further

RE: How to Define "BLOB" dataType of SQL in Appian CDT

Stefan Helzle — Fri, 02 Sep 2016 11:23:02 GMT

You are very welcome :-)

RE: How to Define "BLOB" dataType of SQL in Appian CDT

mohammedz — Fri, 02 Sep 2016 10:46:11 GMT

Thanks stefan...!!! Looks to be the text which posted worked for Receiving BLOB into Appian
Let me check it for sending..!!!

RE: How to Define "BLOB" dataType of SQL in Appian CDT

Stefan Helzle — Wed, 31 Aug 2016 19:53:38 GMT

I deployed the plugin tried to provide some SQL text to it. Try something like this

="INSERT INTO ""BPMBUSINESS"".""CABCBLOBTESTZUBAIR"" (DOCBLOB) VALUES (?)"

I did not test whether it works or not, but this should get you started.

RE: How to Define "BLOB" dataType of SQL in Appian CDT

mohammedz — Wed, 31 Aug 2016 19:22:58 GMT

@stefan
Yup I added the ? .. but when I try to save expression is giving error like invalid character is der like that

RE: How to Define "BLOB" dataType of SQL in Appian CDT

Stefan Helzle — Wed, 31 Aug 2016 16:44:13 GMT

The documentation states to include the question mark. Have you tried this?

RE: How to Define "BLOB" dataType of SQL in Appian CDT

mohammedz — Wed, 31 Aug 2016 12:54:39 GMT

@Ankit

I have published the CDT and DataStore
When i try fetching the table data using a QueryRule I am not getting data
Getting the below Error

There was an error testing the rule:

Expression evaluation error in rule 'blob_getdata' at function 'queryruleexec': Error evaluating function 'queryruleexec' : Unexpected error executing query (type: [CABCBLOBCDTDT23013], query: [BLOB_getData], order by: [[]], filters:[(ID = TypedValue[it=1,v=5])])

Any idea how to fetch data ??

RE: How to Define "BLOB" dataType of SQL in Appian CDT

mohammedz — Wed, 31 Aug 2016 12:52:35 GMT

Yup i have tried this too but seems to be not working

RE: How to Define "BLOB" dataType of SQL in Appian CDT

Stefan Helzle — Wed, 31 Aug 2016 12:21:28 GMT

Looks like to many parenthesis. Have you tried this: ='INSERT INTO "BPMBUSINESS"."CABCBLOBTESTZUBAIR" (DOCBLOB) VALUES (ac!doc)'

RE: How to Define "BLOB" dataType of SQL in Appian CDT

mohammedz — Wed, 31 Aug 2016 11:55:31 GMT

Yup I followed the same and used the below expression. Its not working. I am not able to save the process model only

=('INSERT INTO "BPMBUSINESS"."CABCBLOBTESTZUBAIR" (DOCBLOB) VALUES (ac!doc))')

RE: How to Define "BLOB" dataType of SQL in Appian CDT

Stefan Helzle — Wed, 31 Aug 2016 11:46:04 GMT

Documentation says: Blob SQL Query (Please include "?" as parameter to refer to blob column in the column list and keep it as first parameter (i.e. "INSERT INTO [TABLE_NAME] ([BLOB_COLUMN]) VALUES (?)"))

RE: How to Define "BLOB" dataType of SQL in Appian CDT

mohammedz — Wed, 31 Aug 2016 11:44:39 GMT

@stefan791

We have three parameters
Datastore and Documents are fine. But I dont understand how to pass the Query into Second parameter. Any Idea of passing it

RE: How to Define "BLOB" dataType of SQL in Appian CDT

Stefan Helzle — Wed, 31 Aug 2016 11:44:30 GMT

Mapping a CDT field to a BLOB will not allow you to store or retrieve documents in DB. You have to use the plugin. I never used this plugin, but the documentation looks pretty simple. What is your problem?

RE: How to Define "BLOB" dataType of SQL in Appian CDT

mohammedz — Wed, 31 Aug 2016 11:40:23 GMT

@stefan791

I am using the same what you mentioned.But I have a issue
How to pass the SQL Query to the smart Service

RE: How to Define "BLOB" dataType of SQL in Appian CDT

mohammedz — Wed, 31 Aug 2016 11:38:48 GMT

Great Ankit .... Same annotation worked for BLOB as well

Appreciate ur help ..!! Thanks

RE: How to Define "BLOB" dataType of SQL in Appian CDT

Stefan Helzle — Wed, 31 Aug 2016 11:38:32 GMT

To store documents in DB there is some plugins available.

forum.appian.com/.../blob

You will have to check compatibility of these plugins as they are for 7.10. To access the data from Appian you can just skip the document field as the plugin uses SQL queries to read and write data.

RE: How to Define "BLOB" dataType of SQL in Appian CDT

ankitb703441 — Wed, 31 Aug 2016 11:10:59 GMT

I have used the following definition for CLOB, It worked for me. it should be same for BLOB.

<xsd:element name="DOCUMENT" nillable="true" type="xsd:string">
<xsd:annotation>
<xsd:appinfo source="appian.jpa">@Column(name="DOCUMENT", columnDefinition="CLOB")</xsd:appinfo>
</xsd:annotation>
</xsd:element>

RE: How to Define "BLOB" dataType of SQL in Appian CDT

mohammedz — Wed, 31 Aug 2016 11:04:19 GMT

Is there could be any other approach ?