[
https://issues.apache.org/jira/browse/CASSANDRA-13787?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16138159#comment-16138159
]
ZhaoYang edited comment on CASSANDRA-13787 at 8/28/17 2:50 AM:
---------------------------------------------------------------
The first problem is not exactly a MV bug, it's SSTableReader issue of handling
multiple slices which is probably only used by MV. The existing code consumes
the {{original RangeTombstoneMarker(eg. Deletion@c1=1@10)}} for the first slice
to generate a RangeTombstoneMarker(eg. Deletion@c1=1&c1=0@10) with first
slice's clustering. So there is no tombstones generated for other slices. The
fix is to make sure tombstones are generated for each slices within the range
of original RangeTombstoneMarker and do not close the openMarker til reading
its paired closeMarker.
The second problem is that if there is no existing live data, empty existing
row is given to the ViewUpdateGenerator which may resurrect deleted cells. The
fix is to include current-open-deletion into the empty existing row. So view
could shadow the deleted cells.
[Draft|https://github.com/jasonstack/cassandra/commits/CASSANDRA-13787-3.0]
patch base on cassandra-3.0 . This needs to be fixed in 3.0/3.11/trunk.
was (Author: jasonstack):
The first problem is not exactly a MV bug, it's SSTableReader issue of handling
multiple slices which is probably only used by MV. The existing code consumes
the {{original RangeTombstoneMarker(eg. Deletion@c1=1@10)}} for the first slice
to generate a RangeTombstoneMarker(eg. Deletion@c1=1&c1=0@10) with first
slice's clustering. So there is no tombstones generated for other slices. The
fix is change the ClusteringPrefix comparison, to make sure tombstones are
generated for each slices within the range of original RangeTombstoneMarker.
The second problem is that if there is no existing live data, empty existing
row is given to the ViewUpdateGenerator which may resurrect deleted cells. The
fix is to include current-open-deletion into the empty existing row. So view
could shadow the deleted cells.
[Draft|https://github.com/jasonstack/cassandra/commits/CASSANDRA-13787-3.0]
patch base on cassandra-3.0 . This needs to be fixed in 3.0/3.11/trunk.
> RangeTombstoneMarker and ParitionDeletion is not properly included in MV
> ------------------------------------------------------------------------
>
> Key: CASSANDRA-13787
> URL: https://issues.apache.org/jira/browse/CASSANDRA-13787
> Project: Cassandra
> Issue Type: Bug
> Components: Local Write-Read Paths, Materialized Views
> Reporter: ZhaoYang
> Assignee: ZhaoYang
>
> Found two problems related to MV tombstone.
> 1. Range-tombstone-Marker being ignored after shadowing first row, subsequent
> base rows are not shadowed in TableViews.
> If the range tombstone was not flushed, it was used as deleted row to
> shadow new updates. It works correctly.
> After range tombstone was flushed, it was used as RangeTombstoneMarker
> and being skipped after shadowing first update. The bound of
> RangeTombstoneMarker seems wrong, it contained full clustering, but it should
> contain range or it should be multiple RangeTombstoneMarkers for multiple
> slices(aka. new updates)
> 2. Partition tombstone is not used when no existing live data, it will
> resurrect deleted cells. It was found in 11500 and included in that patch.
> In order not to make 11500 patch more complicated, I will try fix
> range/partition tombstone issue here.
> {code:title=Tests to reproduce}
> @Test
> public void testExistingRangeTombstoneWithFlush() throws Throwable
> {
> testExistingRangeTombstone(true);
> }
> @Test
> public void testExistingRangeTombstoneWithoutFlush() throws Throwable
> {
> testExistingRangeTombstone(false);
> }
> public void testExistingRangeTombstone(boolean flush) throws Throwable
> {
> createTable("CREATE TABLE %s (k1 int, c1 int, c2 int, v1 int, v2 int,
> PRIMARY KEY (k1, c1, c2))");
> execute("USE " + keyspace());
> executeNet(protocolVersion, "USE " + keyspace());
> createView("view1",
> "CREATE MATERIALIZED VIEW view1 AS SELECT * FROM %%s WHERE
> k1 IS NOT NULL AND c1 IS NOT NULL AND c2 IS NOT NULL PRIMARY KEY (k1, c2,
> c1)");
> updateView("DELETE FROM %s USING TIMESTAMP 10 WHERE k1 = 1 and c1=1");
> if (flush)
>
> Keyspace.open(keyspace()).getColumnFamilyStore(currentTable()).forceBlockingFlush();
> String table = KEYSPACE + "." + currentTable();
> updateView("BEGIN BATCH " +
> "INSERT INTO " + table + " (k1, c1, c2, v1, v2) VALUES (1, 0,
> 0, 0, 0) USING TIMESTAMP 5; " +
> "INSERT INTO " + table + " (k1, c1, c2, v1, v2) VALUES (1, 0,
> 1, 0, 1) USING TIMESTAMP 5; " +
> "INSERT INTO " + table + " (k1, c1, c2, v1, v2) VALUES (1, 1,
> 0, 1, 0) USING TIMESTAMP 5; " +
> "INSERT INTO " + table + " (k1, c1, c2, v1, v2) VALUES (1, 1,
> 1, 1, 1) USING TIMESTAMP 5; " +
> "INSERT INTO " + table + " (k1, c1, c2, v1, v2) VALUES (1, 1,
> 2, 1, 2) USING TIMESTAMP 5; " +
> "INSERT INTO " + table + " (k1, c1, c2, v1, v2) VALUES (1, 1,
> 3, 1, 3) USING TIMESTAMP 5; " +
> "INSERT INTO " + table + " (k1, c1, c2, v1, v2) VALUES (1, 2,
> 0, 2, 0) USING TIMESTAMP 5; " +
> "APPLY BATCH");
> assertRowsIgnoringOrder(execute("select * from %s"),
> row(1, 0, 0, 0, 0),
> row(1, 0, 1, 0, 1),
> row(1, 2, 0, 2, 0));
> assertRowsIgnoringOrder(execute("select k1,c1,c2,v1,v2 from view1"),
> row(1, 0, 0, 0, 0),
> row(1, 0, 1, 0, 1),
> row(1, 2, 0, 2, 0));
> }
> @Test
> public void testRangeDeletionWithFlush() throws Throwable
> {
> testExistingParitionDeletion(true);
> }
> @Test
> public void testRangeDeletionWithoutFlush() throws Throwable
> {
> testExistingParitionDeletion(false);
> }
> public void testExistingParitionDeletion(boolean flush) throws Throwable
> {
> // for partition range deletion, need to know that existing row is
> shadowed instead of not existed.
> createTable("CREATE TABLE %s (a int, b int, c int, d int, PRIMARY KEY
> (a))");
> execute("USE " + keyspace());
> executeNet(protocolVersion, "USE " + keyspace());
> createView("mv_test1",
> "CREATE MATERIALIZED VIEW %s AS SELECT * FROM %%s WHERE a
> IS NOT NULL AND b IS NOT NULL PRIMARY KEY (a, b)");
> Keyspace ks = Keyspace.open(keyspace());
> ks.getColumnFamilyStore("mv_test1").disableAutoCompaction();
> execute("INSERT INTO %s (a, b, c, d) VALUES (?, ?, ?, ?) using
> timestamp 0", 1, 1, 1, 1);
> if (flush)
> FBUtilities.waitOnFutures(ks.flush());
> assertRowsIgnoringOrder(execute("SELECT * FROM mv_test1"), row(1, 1,
> 1, 1));
> // remove view row
> updateView("UPDATE %s using timestamp 1 set b = null WHERE a=1");
> if (flush)
> FBUtilities.waitOnFutures(ks.flush());
> assertRowsIgnoringOrder(execute("SELECT * FROM mv_test1"));
> // remove base row, no view updated generated.
> updateView("DELETE FROM %s using timestamp 2 where a=1");
> if (flush)
> FBUtilities.waitOnFutures(ks.flush());
> assertRowsIgnoringOrder(execute("SELECT * FROM mv_test1"));
> // restor view row with b,c column. d is still tombstone
> updateView("UPDATE %s using timestamp 3 set b = 1,c = 1 where a=1");
> // upsert
> if (flush)
> FBUtilities.waitOnFutures(ks.flush());
> assertRowsIgnoringOrder(execute("SELECT * FROM mv_test1"), row(1, 1,
> 1, null));
> }
> {code}
--
This message was sent by Atlassian JIRA
(v6.4.14#64029)
---------------------------------------------------------------------
To unsubscribe, e-mail: commits-unsubscr...@cassandra.apache.org
For additional commands, e-mail: commits-h...@cassandra.apache.org
