Important

Helios features are now enabled during weekly update windows and are no longer directly tied to SingleStore engine releases. Refer to the release notes to view the latest features available in your Helios cluster.

BSON_EXTRACT_DOUBLE

Syntax

BSON_EXTRACT_DOUBLE(<input> [, path_key_1, path_key_2,.., path_key_n])

Arguments

<input>: A valid BSON document or an expression that evaluates to a valid BSON document.
<path>: A comma-separated list of dictionary keys or array positions (zero-based index).

Return Type

SingleStore DOUBLE type.

Remarks

The BSON INT32, INT64, and DOUBLE (except NaN, +infinity, or -infinity) types are returned as is.
BSON DECIMAL128 type is typecast using the Intel RDFP Library. If the converted value is out of range, NULL is returned.
Returns NULL if:
- The extracted value is out of range, a non-numeric BSON type, NaN, +infinity, or -infinity.
- The specified path does not exist.

Examples

Note: The following examples explicitly cast string to BSON for clarity.

The following example extracts a BSON INT32 type:

SQL

SELECT BSON_EXTRACT_DOUBLE('{"a":{"b":10}}':>BSON, 'a', 'b') AS Result;

+--------+
| Result |
+--------+
|     10 |
+--------+

The following example extracts a BSON INT64 type:

SQL

SELECT BSON_EXTRACT_DOUBLE('{"a":{"b":{"$numberLong":"10"}}}':>BSON, 'a', 'b') AS Result;

+--------+
| Result |
+--------+
|     10 |
+--------+

The following examples extract a BSON DOUBLE type:

SQL

SELECT BSON_EXTRACT_DOUBLE('{"a":{"b":{"$numberDouble":"922337203685477586.9"}}}':>BSON, 'a', 'b') AS Result;

+----------------------+
| Result               |
+----------------------+
| 9.223372036854776e17 |
+----------------------+

SQL

SELECT BSON_EXTRACT_DOUBLE('{"a":{"b":{"$numberDouble":"NaN"}}}':>BSON, 'a', 'b') AS Result;

+--------+
| Result |
+--------+
|   NULL |
+--------+

The following example extracts a BSON DECIMAL type:

SQL

SELECT BSON_EXTRACT_DOUBLE('{"a":{"b":{"$numberDecimal":"-9223372036854775807.9"}}}':>BSON, 'a', 'b')AS Result;

+-----------------------+
| Result                |
+-----------------------+
| -9.223372036854776e18 |
+-----------------------+

BSON_EXTRACT_DOUBLE

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Syntax

Arguments

Return Type

Remarks

Examples

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