Hi everyone,
I resolved this. After looking around for similar issues, I found this thread:
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| Re: UDF - Access Tuple Column Values By NameThanks James. Thanks,KathirOn
Wed, May 6, 2015 at 2:37 PM, James Taylor <... |
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I was incorrectly using ImmutableBytesWritable's get() method. Using
copyBytes() on ptr did the job!
Sincerely,Anchal
On Monday, August 3, 2015 12:38 PM, Anchal Agrawal <[email protected]>
wrote:
Hi,
I'm writing a UDF that accesses a bytearray in a Phoenix view's column and
returns the long value by applying HBase's Bytes.toBytes() method. I'm having
issues grabbing the bytearray stored in the column.
Phoenix view of an existing HBase table: create view "view_name" (pk VARBINARY
PRIMARY KEY, "cf"."col" VARBINARY);UDF: create function getLong(VARBINARY)
returns LONG as 'mypackage.getLong';Usage: select pk, getLong("col") from
"view_name";
In the UDF's evaluate() method, I've tried accessing the column value with
Tuple's getValue() methods and Cell's getValueArray() method, but I'm not
getting the expected values. I've looked at built-in UDFs such as
ToNumberFunction. Some functions implement the readFields() and write()
methods, while some don't. Is my UDF supposed to implement these? So far, I've
been trying to access the column values in the evaluate() method through the
Cell and Tuple classes.
What's the best way to grab a column's value in a UDF? I appreciate your help.
Thanks,Anchal
