Hash-Related Functions - Analytics Database - Teradata Vantage

SQL Functions, Expressions, and Predicates

Deployment
VantageCloud
VantageCore
Edition
Enterprise
IntelliFlex
VMware
Product
Analytics Database
Teradata Vantage
Release Number
17.20
Published
June 2022
Language
English (United States)
Last Update
2024-01-12
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lifecycle
latest
Product Category
Teradata Vantageā„¢
Hash-related functions return information about the:
  • Primary or fallback AMP that corresponds to a given hash bucket number
  • Hash bucket number that corresponds to a given row hash value
  • Row hash value for the primary index of a row
  • Highest AMP number
  • Highest hash bucket number
  • Maximum value that can be generated by applying the hash function to an unsigned integer

Use the hash-related functions to identify the statistical properties of the current primary index or secondary index, or to evaluate these properties for other columns to determine their suitability as a future primary index or secondary index. The statistics can help you to minimize hash synonyms and enhance the uniformity of data distribution.