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Takes one or more input parameters of any data type and returns a 64-bit non-cryptographic hash value. HASH uses the CityHash algorithm for string data types, implementation-specific algorithms for other data types, and the CityHash combinator to produce the resulting hash value. NULL values of any type get the same fixed value. See CITY_HASH if NULL values should produce NULL.

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Syntax

HASH(<expression>, [, expression [,...]])

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Parameters

ParameterDescriptionSupported input types
<expression>An expression that returns any data type that Firebolt supports.Any

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Return type

BIGINT

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Examples

SELECT HASH('esimpson', '08-25-2016');
hash long
-6509667128195191394

Rows: 1Execution time: 4.85ms

SELECT HASH(NULL, '08-25-2016');
hash long
7610523868633494549

Rows: 1Execution time: 7.10ms