BSON_
Warning
SingleStore 9.0 gives you the opportunity to preview, evaluate, and provide feedback on new and upcoming features prior to their general availability. In the interim, SingleStore 8.9 is recommended for production workloads, which can later be upgraded to SingleStore 9.0.
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Returns the number of keys present in the BSON object or array.
Syntax
BSON_LENGTH(<value>)Argument
<value>: A valid BSON object or array, or an expression that evaluates to a valid BSON object or array.
Return Type
A number.
Remarks
Returns NULL if the input value is one of the following:
-
An invalid BSON type
-
A BSON type other than a document or an array
-
A
NULL
Examples
Note: The following examples explicitly cast string to BSON for clarity.
SELECT BSON_LENGTH('{"a":1, "b":2, "c":"abc"}':>BSON) AS Length;
+--------+
| Length |
+--------+
| 3 |
+--------+SELECT BSON_LENGTH('[1, true, null, [7,8,9], "abc"]':>BSON) AS Length;
+--------+
| Length |
+--------+
| 5 |
+--------+SELECT BSON_LENGTH('null':>BSON) AS Length;
+--------+
| Length |
+--------+
| NULL |
+--------+Last modified: April 2, 2024