ARRAY_LENGTH (NoSQL query)
APPLIES TO: NoSQL
Returns the number of elements in the specified array expression.
Syntax
ARRAY_LENGTH(<array_expr>)
Arguments
Description | |
---|---|
array_expr |
An array expression. |
Return types
Returns a numeric expression.
Examples
The following example illustrates how to get the length of an array using the function.
SELECT VALUE {
length: ARRAY_LENGTH([70, 86, 92, 99, 85, 90, 82]),
emptyLength: ARRAY_LENGTH([]),
nullLength: ARRAY_LENGTH(null)
}
[
{
"length": 7,
"emptyLength": 0
}
]
Remarks
- This system function doesn't use the index.
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