v3 fbclient cannot work with servers older than v2.5 via the remote protocol [CORE4872] #5168
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Modified by: @dyemanovComponent: API / Client Library [ 10040 ] assignee: Dmitry Yemanov [ dimitr ] Component: Engine [ 10000 ] => |
Modified by: @dyemanovstatus: Open [ 1 ] => Resolved [ 5 ] resolution: Fixed [ 1 ] Fix Version: 3.0 RC 1 [ 10584 ] |
Modified by: @pcisarstatus: Resolved [ 5 ] => Closed [ 6 ] |
Modified by: @pavel-zotovstatus: Closed [ 6 ] => Closed [ 6 ] QA Status: No test => Cannot be tested |
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Submitted by: @dyemanov
Historically, BLOB IDs were described as blr_quad in remote messages, because older server versions don't understand blr_blob2. v3 fbclient breaks this compatibility by sending blr_blob2 over the wire. ISQL connects fine, SHOW VERSION executes fine, but "select * from rdb$database" throws "error reading data from the connection".
I suppose we could simply revert back to the old behavior, but a more clever approach would be to check the protocol version and use blr_blob2 only if the server is known to understand it. I'm preparing the patch at the moment.
Commits: 1776ee0 FirebirdSQL/fbt-repository@cda2aec
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