[
https://issues.apache.org/jira/browse/CALCITE-2864?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Forward Xu updated CALCITE-2864:
--------------------------------
Description:
Returns the maximum depth of a JSON document. Returns {{NULL}} if the argument
is {{NULL}}. An error occurs if the argument is not a valid JSON document.
An empty array, empty object, or scalar value has depth 1. A nonempty array
containing only elements of depth 1 or nonempty object containing only member
values of depth 1 has depth 2. Otherwise, a JSON document has depth greater
than 2.
Example Sql:
SELECT JSON_LENGTH(v) AS c1
,JSON_LENGTH(JSON_VALUE(v, 'lax $.b' ERROR ON ERROR)) AS c2
,JSON_LENGTH(JSON_VALUE(v, 'strict $.a[0]' ERROR ON ERROR)) AS c3
,JSON_LENGTH(JSON_VALUE(v, 'strict $.a[1]' ERROR ON ERROR)) AS c4
FROM (VALUES ('{"a": [10, true],"b": "[10, true]"}')) AS t(v)
limit 10;
Result:
c1 c2 c3 c4
== == == ==
2 1 1 1
was:
Returns the maximum depth of a JSON document. Returns {{NULL}} if the argument
is {{NULL}}. An error occurs if the argument is not a valid JSON document.
An empty array, empty object, or scalar value has depth 1. A nonempty array
containing only elements of depth 1 or nonempty object containing only member
values of depth 1 has depth 2. Otherwise, a JSON document has depth greater
than 2.
Example Sql:
SELECT JSON_LENGTH(v) AS c1
,JSON_LENGTH(JSON_VALUE(v, 'lax $.b' ERROR ON ERROR)) AS c2
,JSON_LENGTH(JSON_VALUE(v, 'strict $.a[0]' ERROR ON ERROR)) AS c3
,JSON_LENGTH(JSON_VALUE(v, 'strict $.a[1]' ERROR ON ERROR)) AS c4
FROM (VALUES ('\{"a": [10, true],"b": "[10, true]"}')) AS t(v)
limit 10;
Result:
c1 c2 c3 c4
== == == ==
2 1 1 1
> Add the JSON_DEPTH function
> ---------------------------
>
> Key: CALCITE-2864
> URL: https://issues.apache.org/jira/browse/CALCITE-2864
> Project: Calcite
> Issue Type: Sub-task
> Reporter: Forward Xu
> Assignee: Forward Xu
> Priority: Major
> Labels: pull-request-available
> Time Spent: 10m
> Remaining Estimate: 0h
>
> Returns the maximum depth of a JSON document. Returns {{NULL}} if the
> argument is {{NULL}}. An error occurs if the argument is not a valid JSON
> document.
> An empty array, empty object, or scalar value has depth 1. A nonempty array
> containing only elements of depth 1 or nonempty object containing only member
> values of depth 1 has depth 2. Otherwise, a JSON document has depth greater
> than 2.
> Example Sql:
> SELECT JSON_LENGTH(v) AS c1
> ,JSON_LENGTH(JSON_VALUE(v, 'lax $.b' ERROR ON ERROR)) AS c2
> ,JSON_LENGTH(JSON_VALUE(v, 'strict $.a[0]' ERROR ON ERROR)) AS c3
> ,JSON_LENGTH(JSON_VALUE(v, 'strict $.a[1]' ERROR ON ERROR)) AS c4
> FROM (VALUES ('{"a": [10, true],"b": "[10, true]"}')) AS t(v)
> limit 10;
> Result:
> c1 c2 c3 c4
> == == == ==
> 2 1 1 1
--
This message was sent by Atlassian JIRA
(v7.6.3#76005)
