[
https://issues.apache.org/jira/browse/METAMODEL-195?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15020291#comment-15020291
]
ASF GitHub Bot commented on METAMODEL-195:
------------------------------------------
Github user kaspersorensen commented on a diff in the pull request:
https://github.com/apache/metamodel/pull/70#discussion_r45542637
--- Diff: core/src/main/java/org/apache/metamodel/query/FromClause.java ---
@@ -75,7 +75,13 @@ public FromItem getItemByReference(String reference) {
return null;
}
- private FromItem getItemByReference(FromItem item, String reference) {
+ private FromItem getItemByReference(final FromItem item, final String
reference) {
+ if (reference.equals(item.toStringNoAlias(false))) {
+ return item;
+ }
+ if (reference.equals(item.toStringNoAlias(true))) {
+ return item;
+ }
final String alias = item.getAlias();
--- End diff --
Makes no difference to me, so I can easily change it :-)
> Scalar function to get key from a MAP type field
> ------------------------------------------------
>
> Key: METAMODEL-195
> URL: https://issues.apache.org/jira/browse/METAMODEL-195
> Project: Apache MetaModel
> Issue Type: Improvement
> Reporter: Kasper Sørensen
>
> Now that we have support for scalar functions, and we also support a host of
> key/value or document oriented datastores, I think it would be really natural
> to support a function for getting a value inside a map.
> Example:
> {code}
> SELECT MAP_VALUE(address, 'street') FROM contacts
> {code}
> Ideally the function would allow for a full "path" of keys so that you could
> have maps-within-maps and so on.
> {code}
> SELECT MAP_VALUE(address, 'homeaddress.street') FROM contacts
> {code}
> Even more ideally we would also add a bit of query parser logic to allow
> expressing the path as part of the operand itself:
> {code}
> SELECT address.homeaddress.street FROM contacts
> {code}
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)
