Archives of the TeradataForum
Message Posted: Tue, 28 Jun 2005 @ 17:04:36 GMT
| Subj: | | Re: Teradata row distribution and hashing |
| |
| From: | | sanjaya.nagabhushan |
| | Is there any technique which can help the data architect determine the hash value range if an attribute were added an existing index
? | |
1) There is no guarantee that hash value of consecutive values would be consecutive so I don't think we can get a range.
2) You can use the teradata function HASHROW (column list) to get the row hash value of column(s) or constants.
You can consider using a Hash Index or a Single Table Join Index on the child table to ensure AMP local join.
Regards,
Sanjaya
| 
