[SOLR-7090] Cross collection join

• Type: New Feature
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Fix Version/s: 5.2, 6.0
• Assignee: Unassigned
• Reporter: Ishan Chattopadhyaya
• Created: 09/Feb/15 10:57
• Updated: 24/Mar/23 15:47

Description

Although SOLR-4905 supports joins across collections in Cloud mode, there are limitations, the secondary collection must be replicated at each node where the primary collection has a replica, (ii) the secondary collection must be singly sharded.

This issue explores ideas/possibilities of cross collection joins, even across nodes. This will be helpful for users who wish to maintain boosts or signals in a secondary, more frequently updated collection, and perform query time join of these boosts/signals with results from the primary collection.

Issue Links

• is duplicated by: SOLR-7776 Cross core Join across different nodes
• is related to: SOLR-7341 xjoin - join data from external sources
• relates to: SOLR-8297 Allow join query over 2 sharded collections: enhance functionality and exception handling
• relates to: SOLR-16717 Joining collocated shards