Bug #4523

Updated by Tom Clegg almost 7 years ago

To reproduce:

Go to https://workbench.qr1hi.arvadosapi.com/, enter any term into the search box (I used "hash") and click the search button. The search modal box will appear and display a spinning wheel. After some time it issues "Oops, request failed."

Proposed fix:
* Add database indexes to all tables:
** one on owner_uuid
** one on the full set of searchable columns (i.e., @ModelClass.searchable_columns("<") | ModelClass.searchable_columns("like")@)
** (phase2) each searchable column
* To avoid undetected additions of columns without indexes in the future, add a unit test that iterates over all model classes and tests:
** there is a multi-column index on the full set of searchable columns
** there is an index on owner_uuid and an index on uuid
** (phase2) there is an index on each searchable column

Fix phase 3 (see subtask #4900): We want "search for filename" to be fast, but manifest_text is too big to index. Therefore Let's wait on the "(phase2)" items until we want to add a new column of type string with file names only, truncated to see results from the allowed size. rest...
* Add a file_names column to collections table (@:string, length: 2**16@).
* Add a before_save hook to update the file_names attribute whenever manifest_text changes. If a manifest has more than 64KiB worth of filenames, just truncate the file_names attribute. (Saving the manifest will still work, but some filenames won't be searchable.)
* Use file_names instead of manifest_text when when searching for "any" in collections table.
* Omit text columns from searchable_columns.
* Add tests:
** Searching by filename works.
** Storing a manifest with 1MiB worth of filenames works. This can be built reasonably quickly like this:
*** <pre>. d41d8[...] 0:0:longlonglongfilename0000001 0:0:longlonglongfilename0000002 ...\n</pre>

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