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https://issues.apache.org/jira/browse/HIVE-27499?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Sai Hemanth Gantasala resolved HIVE-27499.
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Fix Version/s: 4.0.0-beta-1
Resolution: Fixed
> Add optional table name filter to the HMS notification fetch API
> ----------------------------------------------------------------
>
> Key: HIVE-27499
> URL: https://issues.apache.org/jira/browse/HIVE-27499
> Project: Hive
> Issue Type: New Feature
> Reporter: Quanlong Huang
> Assignee: Sai Hemanth Gantasala
> Priority: Major
> Labels: pull-request-available
> Fix For: 4.0.0-beta-1
>
>
> The current notification fetch API does not support filters on table name:
> {code:java}
> struct NotificationEventRequest {
> 1: required i64 lastEvent,
> 2: optional i32 maxEvents,
> 3: optional list<string> eventTypeSkipList,
> }
> NotificationEventResponse get_next_notification(1:NotificationEventRequest
> rqst)
> {code}
> Engines that cache HMS metadata and file metadata might want to know whether
> they have synced to the latest events on some given tables.
> In order to efficiently fetch events specific to a table, we should enhance
> the notification fetch API to include an optional table name in the request
> so that only events for that given table are returned. The NOTIFICATION_LOG
> table in the HMS should also have an index on table_name so that API calls
> with the filter do not do a table scan.
> With the index added, we can also extend the NotificationEventsCountRequest
> with an optional table name, and extend the response to carry the largest
> event id on that table. Currently they are:
> {code:java}
> struct NotificationEventsCountRequest {
> 1: required i64 fromEventId,
> 2: required string dbName,
> 3: optional string catName,
> 4: optional i64 toEventId,
> 5: optional i64 limit
> }
> struct NotificationEventsCountResponse {
> 1: required i64 eventsCount,
> }
> NotificationEventsCountResponse
> get_notification_events_count(1:NotificationEventsCountRequest rqst)
> {code}
> Similar API for multiple tables (given a table lists) will also be helpful
> since a query usually involves several tables.
> CC [~hemanth619], [~ngangam]
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