MonetDB "forgets" columns after ALTER TABLE statements #6748
Last updated: 2019-09-02 16:05:26 +0200
Date: 2019-08-14 10:18:57 +0200
I have a situation where after bulk-loading CSV data (8k rows in a 696 column table) and then adding/removing columns, the removed columns are only usable while the server is still running, but "disappear" after a server restart.
For now, I only have a showcase with non-public data that I cannot share in this bug report. I'll try to find time to reproduce it with public/synthetic data.
Till then, maybe this already rings a bell with someone?
I happens with both Apr2019 feature release and Apr2019-SP1 bugfix release candidate/preview.
Date: 2019-08-14 11:41:44 +0200
Created attachment 624
Date: 2019-08-14 11:47:13 +0200
Test added as attachment to this bug report.
if the added column is also declared as foreign key,
2019-08-14 11:45:06 ERR DBname: mserver5: /export/scratch1/home/manegold/_/Monet/release/source/MonetDB/sql/storage/store.c:406: load_idxcolumn: Assertion `kc->c' failed.
(or segfault in case not debug build)
Date: 2019-08-14 12:23:10 +0200
The server failed to create the needed binary tables. Fix is coming soon.
Date: 2019-08-14 12:28:49 +0200
For complete details, see https//devmonetdborg/hg/MonetDB?cmd=changeset;node=164eee74d3cf
Date: 2019-08-18 14:44:10 +0200
Many thanks for the instant fix!
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