[jira] [Updated] (CALCITE-2880) Add the JSON_PRETTY function

["Ritesh (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/CALCITE-2880?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Ritesh updated CALCITE-2880:
----------------------------
    Description: 
```
 JSON_PRETTY(**json_string_doc**)
 ```

Returns the pretty formatted JSON document. Returns `NULL` if any argument is `NULL` or if JSON document is invalid.

Example Sql:

```sql
SELECT JSON_PRETTY(v) AS c1
FROM (VALUES ('\{"a": [10, true],"b": [10, true]}')) as t(v)
limit 10
 ```

Result:
|c1|
|----|
|{
 "a" : [ 10, true ],
 "b" : [ 10, true ]
}|

 

  was:
```
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 |

 


> 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
>            Priority: Major
>              Labels: pull-request-available
>
> ```
>  JSON_PRETTY(**json_string_doc**)
>  ```
> Returns the pretty formatted JSON document. Returns `NULL` if any argument is `NULL` or if JSON document is invalid.
> Example Sql:
> ```sql
> SELECT JSON_PRETTY(v) AS c1
> FROM (VALUES ('\{"a": [10, true],"b": [10, true]}')) as t(v)
> limit 10
>  ```
> Result:
> |c1|
> |----|
> |{
>  "a" : [ 10, true ],
>  "b" : [ 10, true ]
> }|
>  



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