Ritesh created CALCITE-2880:
-------------------------------
Summary: Add the JSON_PRETTY function
Key: CALCITE-2880
URL: https://issues.apache.org/jira/browse/CALCITE-2880
Project: Calcite
Issue Type: Sub-task
Reporter: Ritesh
Assignee: Forward Xu
```
JSON_LENGTH(**json_doc**[, *path*])
```
Returns the length of a JSON document, or, if a *path* argument is given, the
length of the value within the document identified by the path. Returns `NULL`
if any argument is `NULL` or the *path* argument does not identify a value in
the document. An error occurs if the *json_doc* argument is not a valid JSON
document or the *path* argument is not a valid path expression or contains a
\{**} or }}**{{`*` wildcard.
The length of a document is determined as follows:
- The length of a scalar is 1.
- The length of an array is the number of array elements.
- The length of an object is the number of object members.
- The length does not count the length of nested arrays or objects.
Example Sql:
```sql
SELECT JSON_LENGTH(v, 'lax $' ERROR ON ERROR) AS c1
,JSON_LENGTH(v, 'lax $.a' ERROR ON ERROR) AS c2
,JSON_LENGTH(v, 'strict $.a[0]' ERROR ON ERROR) AS c3
,JSON_LENGTH(v, 'strict $.a[1]' ERROR ON ERROR) AS c4
FROM (VALUES ('\{"a": [10, true]}')) AS t(v)
limit 10;
```
Result:
| c1 | c2 | c3 | c4 |
| ---- | ---- | ---- | ---- |
| 1 | 2 | 1 | 1 |
--
This message was sent by Atlassian JIRA
(v7.6.3#76005)
