JSON_EXTRACT_BIGINT
Descriptionβ
JSON_EXTRACT_BIGINT
extracts the field specified by <json_path>
from a JSON object and converts it to BIGINT
type.
Syntaxβ
JSON_EXTRACT_BIGINT(<json_object>, <json_path>)
Parametersβ
<json_object>
: JSON type, the target parameter to extract from.<json_path>
: String type, the JSON path to extract the target element from the target JSON.
Return Valueβ
Nullable(BIGINT)
Returns the extracted BIGINT value, returns NULL in some cases
Usage Notesβ
- If
<json_object>
or<json_path>
is NULL, returns NULL. - If the element specified by
<json_path>
does not exist, returns NULL. - If the element specified by
<json_path>
cannot be converted to BIGINT, returns NULL. - Its behavior is consistent with "cast + json_extract", which is equivalent to:
CAST(JSON_EXTRACT(<json_object>, <json_path>) as BIGINT)
Examplesβ
- Normal parameters
SELECT json_extract_bigint('{"id": 122222222222223, "name": "doris"}', '$.id');
+-------------------------------------------------------------------------+
| json_extract_bigint('{"id": 122222222222223, "name": "doris"}', '$.id') |
+-------------------------------------------------------------------------+
| 122222222222223 |
+-------------------------------------------------------------------------+ - Case where path does not exist
SELECT json_extract_bigint('{"id": 122222222222223, "name": "doris"}', '$.id2');
+--------------------------------------------------------------------------+
| json_extract_bigint('{"id": 122222222222223, "name": "doris"}', '$.id2') |
+--------------------------------------------------------------------------+
| NULL |
+--------------------------------------------------------------------------+ - NULL parameters
SELECT json_extract_bigint('{"id": 122222222222223, "name": "doris"}', NULl);
+-----------------------------------------------------------------------+
| json_extract_bigint('{"id": 122222222222223, "name": "doris"}', NULl) |
+-----------------------------------------------------------------------+
| NULL |
+-----------------------------------------------------------------------+SELECT json_extract_bigint(NULL, '$.id2');
+------------------------------------+
| json_extract_bigint(NULL, '$.id2') |
+------------------------------------+
| NULL |
+------------------------------------+ - Case where conversion to BIGINT is not possible
SELECT json_extract_bigint('{"id": 123, "name": "doris"}','$.name');
+--------------------------------------------------------------+
| json_extract_bigint('{"id": 123, "name": "doris"}','$.name') |
+--------------------------------------------------------------+
| NULL |
+--------------------------------------------------------------+