Before this patch if the query failes (due to "Too many simultaneous
queries" for example) it will not read external tables info, and the
next request will interpret them as the query beginning at got:
DB::Exception: Unknown packet 11861 from client
v2: reordering in the executeQuery() is not enough, since the query
can fail in other places, before, i.e. quotas
v3: I cannot make non-intergration test (since there is no ability to
receive "Unknown packet" via client, only from the server log),
hence added one
* Fix INSERT into Distributed non local node with MATERIALIZED columns
Previous patch e527def18a ("Fix INSERT
into Distributed() table with MATERIALIZED column") fixes it only for
cases when the node is local, i.e. direct insert.
This patch address the problem when the node is not local
(`is_local == false`), by erasing materialized columns on INSERT into
Distributed.
And this patch fixes two cases, depends on `insert_distributed_sync`
setting:
- `insert_distributed_sync=0`
```
Not found column value in block. There are only columns: date. Stack trace:
2. 0x7ffff7be92e0 DB::Exception::Exception() dbms/src/Common/Exception.h:27
3. 0x7fffec5d6cf6 DB::Block::getByName(...) dbms/src/Core/Block.cpp:187
4. 0x7fffec2fe067 DB::NativeBlockInputStream::readImpl() dbms/src/DataStreams/NativeBlockInputStream.cpp:159
5. 0x7fffec2d223f DB::IBlockInputStream::read() dbms/src/DataStreams/IBlockInputStream.cpp:61
6. 0x7ffff7c6d40d DB::TCPHandler::receiveData() dbms/programs/server/TCPHandler.cpp:971
7. 0x7ffff7c6cc1d DB::TCPHandler::receivePacket() dbms/programs/server/TCPHandler.cpp:855
8. 0x7ffff7c6a1ef DB::TCPHandler::readDataNext(unsigned long const&, int const&) dbms/programs/server/TCPHandler.cpp:406
9. 0x7ffff7c6a41b DB::TCPHandler::readData(DB::Settings const&) dbms/programs/server/TCPHandler.cpp:437
10. 0x7ffff7c6a5d9 DB::TCPHandler::processInsertQuery(DB::Settings const&) dbms/programs/server/TCPHandler.cpp:464
11. 0x7ffff7c687b5 DB::TCPHandler::runImpl() dbms/programs/server/TCPHandler.cpp:257
```
- `insert_distributed_sync=1`
```
2019.10.18 13:23:22.114578 [ 44 ] {a78f669f-0b08-4337-abf8-d31e958f6d12} <Error> executeQuery: Code: 171, e.displayText() = DB::Exception: Block structure mismatch in RemoteBlockOutputStream stream: different number of columns:
date Date UInt16(size = 1), value Date UInt16(size = 1)
date Date UInt16(size = 0): Insertion status:
Wrote 1 blocks and 0 rows on shard 0 replica 0, 127.0.0.1:59000 (average 0 ms per block)
Wrote 0 blocks and 0 rows on shard 1 replica 0, 127.0.0.2:59000 (average 2 ms per block)
(version 19.16.1.1) (from [::1]:3624) (in query: INSERT INTO distributed_00952 VALUES ), Stack trace:
2. 0x7ffff7be92e0 DB::Exception::Exception() dbms/src/Common/Exception.h:27
3. 0x7fffec5da4e9 DB::checkBlockStructure<void>(...)::{...}::operator()(...) const dbms/src/Core/Block.cpp:460
4. 0x7fffec5da671 void DB::checkBlockStructure<void>(...) dbms/src/Core/Block.cpp:467
5. 0x7fffec5d8d58 DB::assertBlocksHaveEqualStructure(...) dbms/src/Core/Block.cpp:515
6. 0x7fffec326630 DB::RemoteBlockOutputStream::write(DB::Block const&) dbms/src/DataStreams/RemoteBlockOutputStream.cpp:68
7. 0x7fffe98bd154 DB::DistributedBlockOutputStream::runWritingJob(DB::DistributedBlockOutputStream::JobReplica&, DB::Block const&)::{lambda()#1}::operator()() const dbms/src/Storages/Distributed/DistributedBlockOutputStream.cpp:280
<snip>
````
Fixes: #7365Fixes: #5429
Refs: #6891
* Cover INSERT into Distributed with MATERIALIZED columns and !is_local node
I guess that adding new cluster into server-test.xml is not required,
but it won't harm.
* Update DistributedBlockOutputStream.cpp
Move the methods of SettingsCollection<> that are dependent on Field to
a separate file, and include it once for each instantiation. This allows
to work on Field without always recompiling the entire project.
<events> sends only deltas for events, while sometimes it is more
convenient to get absolute values (for example to calculate rate).
This patch introduces another directive -- <events_absolute> that will handle
this.
v0: use <events> as bool/string
v2: use <events_absolute>true</events_absolute> over <events>absolute</events>
