[jira] [Commented] (ARROW-5767) [Format] Permit dictionary replacements in IPC protocol
[ https://issues.apache.org/jira/browse/ARROW-5767?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=17011038#comment-17011038 ] Micah Kornfield commented on ARROW-5767: yes, I think this duplicate ARROW-7283 > [Format] Permit dictionary replacements in IPC protocol > --- > > Key: ARROW-5767 > URL: https://issues.apache.org/jira/browse/ARROW-5767 > Project: Apache Arrow > Issue Type: New Feature > Components: Format >Reporter: Wes McKinney >Priority: Major > Fix For: 0.16.0 > > > We permit dictionaries to grow using the {{isDelta}} property in the IPC > protocol. I think it should be allowed for the same dictionary ID to appear > in an IPC protocol stream but with {{isDelta=false}}. This would indicate > that the dictionary in that message is to replace any prior-observed ones in > subsequent record batches. > For example, we might have dictionary batches in a stream: > {code} > id: 0 isDelta: false values: [a, b, c] > id: 0 isDelta: true values [d] > id 0 isDelta: false values [c, a, b] > {code} > Such data could easily be produced by a stream producer that is creating > dictionaries in different execution threads. -- This message was sent by Atlassian Jira (v8.3.4#803005)
[jira] [Commented] (ARROW-5767) [Format] Permit dictionary replacements in IPC protocol
[ https://issues.apache.org/jira/browse/ARROW-5767?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=17010173#comment-17010173 ] Wes McKinney commented on ARROW-5767: - I think this may be resolved now? [~emkornfield] > [Format] Permit dictionary replacements in IPC protocol > --- > > Key: ARROW-5767 > URL: https://issues.apache.org/jira/browse/ARROW-5767 > Project: Apache Arrow > Issue Type: New Feature > Components: Format >Reporter: Wes McKinney >Priority: Major > Fix For: 0.16.0 > > > We permit dictionaries to grow using the {{isDelta}} property in the IPC > protocol. I think it should be allowed for the same dictionary ID to appear > in an IPC protocol stream but with {{isDelta=false}}. This would indicate > that the dictionary in that message is to replace any prior-observed ones in > subsequent record batches. > For example, we might have dictionary batches in a stream: > {code} > id: 0 isDelta: false values: [a, b, c] > id: 0 isDelta: true values [d] > id 0 isDelta: false values [c, a, b] > {code} > Such data could easily be produced by a stream producer that is creating > dictionaries in different execution threads. -- This message was sent by Atlassian Jira (v8.3.4#803005)