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Takes one or more input parameters of any data type and returns a 64-bit non-cryptographic hash value. CITY_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. If any of the inputs is NULL, the result will be NULL. See HASH if NULL values should not produce NULL.

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Syntax

CITY_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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Example

SELECT CITY_HASH('esimpson', '08-25-2016')
Returns: -6,509,667,128,195,191,394 
SELECT CITY_HASH(NULL, '08-25-2016')
Returns: NULL