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fcb8d040e8
Instead of lengthy blurbs, switch to single-line, machine-readable standardized (https://spdx.dev) license identifiers. The Linux kernel switched long ago, so there is strong precedent. Three cases are handled: AGPL-only, Apache-only, and dual licensed. For the latter case, I chose (AGPL-3.0-or-later and Apache-2.0), reasoning that our changes are extensive enough to apply our license. The changes we applied mechanically with a script, except to licenses/README.md. Closes #9937
39 lines
1.9 KiB
Python
39 lines
1.9 KiB
Python
# Copyright 2021-present ScyllaDB
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#
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# SPDX-License-Identifier: AGPL-3.0-or-later
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#############################################################################
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# The cql-pytest framework is about testing CQL functionality, so
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# implementation details like sstables cannot be tested directly. However,
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# we are still able to reproduce some bugs by tricks such as writing some
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# data to the table and then force it to be written to the disk (nodetool
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# flush) and then trying to read the data again, knowing it must come from
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# the disk.
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#############################################################################
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import pytest
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from util import unique_name, new_test_table
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import nodetool
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# Reproduces issue #8138, where the sstable reader in a TWCS sstable set
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# had a bug and resulted in no results for queries.
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# This is a Scylla-only test because it uses BYPASS CACHE which does
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# not exist on Cassandra.
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def test_twcs_optimal_query_path(cql, test_keyspace, scylla_only):
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with new_test_table(cql, test_keyspace,
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"pk int, ck int, v int, PRIMARY KEY (pk, ck)",
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" WITH COMPACTION = {" +
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" 'compaction_window_size': '1'," +
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" 'compaction_window_unit': 'MINUTES'," +
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" 'class': 'org.apache.cassandra.db.compaction.TimeWindowCompactionStrategy' }") as table:
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cql.execute(f"INSERT INTO {table} (pk, ck, v) VALUES (0, 0, 0)")
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# Obviously, scanning the table should now return exactly one row:
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assert 1 == len(list(cql.execute(f"SELECT * FROM {table} WHERE pk = 0")))
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# We will now flush the memtable to disk, and execute the same
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# query again with BYPASS CACHE, to be sure to exercise the code that
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# reads from sstables. We will obviously expect to see the same one
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# result. Issue #8138 caused here zero results, as well as a crash
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# in the debug build.
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nodetool.flush(cql, table)
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assert 1 == len(list(cql.execute(f"SELECT * FROM {table} WHERE pk = 0 BYPASS CACHE")))
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