ACOSH

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Syntax

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Scalar

acosh(value)

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Arguments

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Returns

• Type: DOUBLE; FLOAT when the input is evaluated as FLOAT
• Possible values: Nonnegative values for input at least 1; NaN below 1.
• NULL behavior: Returns NULL when an argument is NULL.

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Properties

• Approximation bound: No fixed maximum error is guaranteed.

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Usage notes

• Numeric inputs are normally converted to DOUBLE for calculation. An input evaluated as FLOAT keeps FLOAT precision.
• INTEGER and INT mean the same type; STRING means VARCHAR text. NULL can be used with a supported type. Cast NULL explicitly when its type would otherwise be unclear.
• Exact result: Floating-point computation can round the mathematical result.

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Examples

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Value and NULL input

SELECT acosh(CAST(1 AS DOUBLE)) AS "value", acosh(CAST(NULL AS DOUBLE)) AS null_value;

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A nonzero input

SELECT round(acosh(CAST(2 AS DOUBLE)), 6) AS result;

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Limitations

• Input below 1 produces NaN rather than NULL.
• Query tools may report DOUBLE even when the result is FLOAT. The reported type does not increase the result’s precision.