ora-hash

Ora_hash is deterministic in that the keeping the input and seed constant will produce a definite output. But, for any seed (including the default), will the output of an ora_hash necessarily have the property that: "No method exists that can be used to predict what the result of an ORA_HASH will be with any level of success higher than purely random guessing?" Probably not, no. ORA_HASH is not designed as a particularly robust hashing algorithm-- it's certainly not something you would use as part of a cryptography library, for example, you'd use the DBMS_CRYPTO.HASH choosing an appropriate

I am working with an Oracle database and I need to be able to partition the data in a table. I understand that Rracle has an ora_hash function that can partition the data into buckets. Is the ora_hash function deterministic? In my program I will be making several different database queries with each query asking for a different bucket number. For example, in one query I might ask for the first two buckets: SELECT * FROM sales WHERE ORA_HASH(cust_id, 9) in (0,1); In a subsequent query I might ask for the 2nd and 3rd bucket: SELECT * FROM sales WHERE ORA_HASH(cust_id, 9) in (1,2); In the above

I would like to use ORA_HASH on xmltype datatype, and workarounds are straight forward solutions ? I am using oracle 11g r2 and binary xml as storage option for xmltype column Query which I used for creation of the table is create table samplebinary ( indexid number(19,0) , xmlcolumn xmltype not null) xmltype column xmlcolumn store as binary xml; As you already know, ora_hash doesn't accept long or LOB values . You could pass in the first 4k or 32k of the XML content, but if you need to make sure that the entire XML document hasn't changed, that won't be sufficient. And as Ben mentioned, ora