I am unable to upload the entire clob data using db2 load. Only the data till a certain length is put into the column(CLOB) of the table.
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I am creating an Athena external table on a CSV that I generated from my PostgreSQL database.
The csv contains a columns that has a jsonb datatype.
If possible, I want to exclude this column from the table created in Athena, or kindly suggest a way to include this datatype.
oid -> creates a table pg_largeobjects and stores data in there
bytea -> if the compressed data would still exceed 2000 bytes, PostgreSQL splits variable length data types in chunks and stores them out of line in a special “TOAST table” according to https://www.cybertec-postgresql.com/en/binary-data-performance-in-postgresql/
I don't want any other table for large data I want to store them in a column in my defined table, is that possible?
It is best to avoid Large Objects.
With bytea you can prevent PostgreSQL from storing data out of line in a TOAST table by changing the column definition like
ALTER TABLE tab ALTER col SET STORAGE MAIN;
Then PostgreSQL will compress that column but keep it in the main table.
Since the block size in PostgreSQL is 8kB, and one row is always stored in a single block, that will limit the size of your table rows to somewhat under 8kB (there is a block header and other overhead).
I think that you are trying to solve a non-problem, and your request to not store large data out of line is unreasonable.
I created a table in PostgreSQL and inserted some data in that table.
I want to change that data from readable to unreadable format because I want to restrict the user to read that data not with authentication only with data.
DB2 exception - DB2 SQL Error: SQLCODE=-433, SQLSTATE=22001 is thrown when inserting a Base64 CLOB data with length of 38K characters into DB2 table CLOB field defined with length of 10MB. Database insertion is done via a Stored Procedure called by a MuleSoft flow. We've been unable to find the root cause or solution to this. Has anyone seen this behaviour?
In DB2 , how do we write a query to fetch value from clob datatype column
Not sure if this will help with your situation, but we ran into a similar situation at my company. For us, we were able to read the values out as a normal string using C#/.NET and the IBM iSeries data provider. The data we wanted to fetch from the CLOB was just simple text, which allowed this process to work.
For sql/pl, you can select clob data from database same other type, but if you use jdbc I should byte[] for Clob data.