Commit Graph

35360 Commits

Author SHA1 Message Date
Pavel Emelyanov
109e032f61 system_keyspace: Unstatic get_truncated_at()
It's called from batchlog replayer which now has local system keyspace
reference and can use it

Signed-off-by: Pavel Emelyanov <xemul@scylladb.com>
2023-03-06 13:28:40 +03:00
Pavel Emelyanov
1907518034 batchlog_manager: Add system_keyspace dependency
The manager will need system ks to get truncation record from, so add it
explicitly. Start-stop sequence no allows that

Signed-off-by: Pavel Emelyanov <xemul@scylladb.com>
2023-03-06 13:28:40 +03:00
Pavel Emelyanov
40b762b841 main: Swap batchlog manager and system keyspace starts
The former needs the latter to get truncation records from and will thus
need it as explicit dependency. In order to have it bathlog needs to
start after system ks. This works as starting batchlog manager doesn't
do anything that's required by system keyspace. This is indirectly
proven by cql-test-env in which batchlog manager starts later than it
does in main

Signed-off-by: Pavel Emelyanov <xemul@scylladb.com>
2023-03-06 13:28:40 +03:00
Pavel Emelyanov
dcbe3e467b system_keyspace: Unstatic get_truncated_position()
It's called from commitlog replayer which has system keyspace instance
on board and can use it

Signed-off-by: Pavel Emelyanov <xemul@scylladb.com>
2023-03-06 13:28:40 +03:00
Pavel Emelyanov
2501ba3887 system_keyspace: Remove unused method
The get_truncated_position() overload that filters records by shard is
nowadays unused. Drop one

Signed-off-by: Pavel Emelyanov <xemul@scylladb.com>
2023-03-06 13:28:40 +03:00
Pavel Emelyanov
47b61389b5 commitlog: Create commitlog_replayer with system keyspace
The replayer code needs system keyspace to fetch truncation records
from, thus it needs this explicit dependency. By the time it runs system
keyspace is fully initialized already

Signed-off-by: Pavel Emelyanov <xemul@scylladb.com>
2023-03-06 13:28:36 +03:00
Pavel Emelyanov
6f9924ff44 test: Make cql_test_env::get_system_keyspace() return sharded
It now returns sys_ks.local(), but next patch would need the whole
sharded reference

Signed-off-by: Pavel Emelyanov <xemul@scylladb.com>
2023-03-06 13:17:21 +03:00
Pavel Emelyanov
73ab1bd74b commiltlog: Line-up field definitions
Just a cosmetic change, so that next patch adding a new member to the
class looks nice

Signed-off-by: Pavel Emelyanov <xemul@scylladb.com>
2023-03-06 13:15:27 +03:00
Botond Dénes
fb898d214c Merge 'Shard major compaction task' from Aleksandra Martyniuk
Implementation of task_manager's task that covers major keyspace compaction
on one shard.

Closes #12662

* github.com:scylladb/scylladb:
  test: extend major keyspace compaction tasks test
  compaction: create task manager's task for major keyspace compaction on one shard
2023-03-02 15:06:31 +02:00
Botond Dénes
91d64372db Merge 'cmake: sync with configure.py (8/n)' from Kefu Chai
- build: cmake: extract more subsystem out into its own CMakeLists.txt
- build: cmake: remove swagger_gen_files
- build: cmake: remove stale TODO comments
- build: cmake: expose scylla_gen_build_dir
- build: cmake: link against cryptopp
- build: cmake: add missing source to utils
- build: cmake: move lib sources into test-lib
- build: cmake: add test/perf

Closes #13059

* github.com:scylladb/scylladb:
  build: cmake: add expr_test test
  build: cmake: allow test to specify the sources
  build: cmake: add test/perf
  build: cmake: move lib sources into test-lib
  build: cmake: add missing source to utils
  build: cmake: link against cryptopp
  build: cmake: expose scylla_gen_build_dir
  build: cmake: remove stale TODO comments
  build: cmake: remove swagger_gen_files
  build: cmake: extract more subsystem out into its own CMakeLists.txt
2023-03-02 14:22:35 +02:00
Botond Dénes
e70be47276 Merge 'commitlog: Fix updating of total_size_on_disk on segment alloc when o_dsync is off' from Calle Wilund
Fixes #12810

We did not update total_size_on_disk in commitlog totals when use o_dsync was off.
This means we essentially ran with no registered footprint, also causing broken comparisons in delete_segments.

Closes #12950

* github.com:scylladb/scylladb:
  commitlog: Fix updating of total_size_on_disk on segment alloc when o_dsync is off
  commitlog: change type of stored size
2023-03-02 12:39:11 +02:00
Botond Dénes
1b5f8916d6 Merge 'Generalize sstable::move_to_new_dir() method' from Pavel Emelyanov
This method requires callers to remember that the sstable is the collection of files on a filesystem and to know what exact directory they are all in. That's not going to work for object storage, instead, sstable should be moved between more abstract states.

This PR replaces move_to_new_dir() call with the change_state() one that accepts target sub-directory string and moves files around. Currently supported state changes:

* staging -> normal
* upload -> normal | staging
* any -> quarantine

All are pretty straightforward and move files between table basedir subdirectories with the exception that upload -> quarantine should move into upload/quarantine subdirectory. Another thing to keep in mind, that normal state doesn't have its subdir but maps directory to table's base directory.

Closes #12648

* github.com:scylladb/scylladb:
  sstable: Remove explicit quarantization call
  test: Move move_to_new_dir() method from sstable class
  sstable, dist.-loader: Introduce and use pick_up_from_upload() method
  sstables, code: Introduce and use change_state() call
  distributed_loader: Let make_sstables_available choose target directory
2023-03-02 09:22:14 +02:00
Kefu Chai
1fe180ffbe build: cmake: add expr_test test
Signed-off-by: Kefu Chai <kefu.chai@scylladb.com>
2023-03-02 14:26:55 +08:00
Kefu Chai
29dc4b0da5 build: cmake: allow test to specify the sources
some tests are compiled from more source files, so add an extra
parameter, so they can customize the sources.

Signed-off-by: Kefu Chai <kefu.chai@scylladb.com>
2023-03-02 14:26:55 +08:00
Kefu Chai
78773c2ebd build: cmake: add test/perf
due to circular dependency: the .cc files under the root of
project references the symbols defined by the source files under
subdirectories, but the source files under subdirectories also
reference the symbols defined by the .cc files under the root
of project, the targets in test/perf do not compile. but
the general structure is created.

Signed-off-by: Kefu Chai <kefu.chai@scylladb.com>
2023-03-02 10:15:25 +08:00
Kefu Chai
a51c928e69 build: cmake: move lib sources into test-lib
less convoluted this way, so each target only includes the sources
in its own directory.

Signed-off-by: Kefu Chai <kefu.chai@scylladb.com>
2023-03-02 10:15:25 +08:00
Kefu Chai
40fb6ff728 build: cmake: add missing source to utils
Signed-off-by: Kefu Chai <kefu.chai@scylladb.com>
2023-03-02 10:15:25 +08:00
Kefu Chai
074281c450 build: cmake: link against cryptopp
since we include cryptopp/ headers, we need find it and link against
it explicitly, instead of relying on seastar to do this.

Signed-off-by: Kefu Chai <kefu.chai@scylladb.com>
2023-03-02 10:15:25 +08:00
Kefu Chai
167d018ca7 build: cmake: expose scylla_gen_build_dir
should have exposed the base directory of genereted headers, not
the one with "rust" component.

Signed-off-by: Kefu Chai <kefu.chai@scylladb.com>
2023-03-02 10:15:25 +08:00
Kefu Chai
47a06e76a2 build: cmake: remove stale TODO comments
they have been addressed already.

Signed-off-by: Kefu Chai <kefu.chai@scylladb.com>
2023-03-02 10:15:25 +08:00
Kefu Chai
1e040e0e12 build: cmake: remove swagger_gen_files
which has been moved into api/CMakeLists.txt

Signed-off-by: Kefu Chai <kefu.chai@scylladb.com>
2023-03-02 10:15:25 +08:00
Kefu Chai
563fbb2d11 build: cmake: extract more subsystem out into its own CMakeLists.txt
namely, cdc, compaction, dht, gms, lang, locator, mutation_writer, raft, readers, replica,
service, tools, tracing and transport.

Signed-off-by: Kefu Chai <kefu.chai@scylladb.com>
2023-03-02 10:15:25 +08:00
Aleksandra Martyniuk
24edcd27d4 test: extend major keyspace compaction tasks test 2023-03-01 18:56:31 +01:00
Aleksandra Martyniuk
b188060535 compaction: create task manager's task for major keyspace compaction on one shard
Implementation of task_manager's task that covers major keyspace compaction
on one shard.
2023-03-01 18:56:26 +01:00
Kefu Chai
d85af3dca4 dht: incremental_owned_ranges_checker: use lower_bound()
instead of using a while loop for finding the lower_bound,
just use std::lower_bound() for finding if current node owns given
token. this has two advantages:

* better readability: as lower_bound is exactly what this loop
  calculates.
* lower_bound uses binary search for searching the element,
  this algorithm should be faster than linear under most
  circumstances.
* lower_bound uses std::advance() and prefix increment operator,
  this should be more performant than the postfix increment operator.
  as it does not create an temporary instance of iterator.

Signed-off-by: Kefu Chai <kefu.chai@scylladb.com>

Closes #13008
2023-03-01 11:29:46 +02:00
Avi Kivity
3042deb930 types: reimplement in terms of a variable template
data_type_for() is a function template that converts a C++
type to a database dynamic type (data_type object).

Instead of implementing a function per type, implement a variable
template instance. This is shorter and nicer.

Since the original type variables (e.g. long_type) are defined separately,
use a reference instead of copying to avoid initialization order problems.

To catch misuses of data_type_for the general data_type_for_v variable
template maps to some unused tag type which will cause a build error
when instantiated.

The original motivation for this was to allow for partial
specialization of data_type_for() for tuple types, but this isn't
really workable since the native type for tuples is std::vector<data_value>,
not std::tuple, and I only checked this after getting the work done,
so this isn't helping anything; it's just a little nicer.

Closes #13043
2023-03-01 11:25:39 +02:00
Botond Dénes
d5dee43be7 Merge 'doc: specify the versions where Alternator TTL is no longer experimental' from Anna Stuchlik
This PR adds a note to the Alternator TTL section to specify in which Open Source and Enterprise versions the feature was promoted from experimental to non-experimental.

The challenge here is that OSS and Enterprise are (still) **documented together**, but they're **not in sync** in promoting the TTL feature: it's still experimental in 5.1 (released) but no longer experimental in 2022.2 (to be released soon).

We can take one of the following approaches:
a) Merge this PR with master and ask the 2022.2 users to refer to master.
b) Merge this PR with master and then backport to branch-5.1. If we choose this approach, it is necessary to backport https://github.com/scylladb/scylladb/pull/11997 beforehand to avoid conflicts.

I'd opt for a) because it makes more sense from the OSS perspective and helps us avoid mess and backporting.

Closes #12295

* github.com:scylladb/scylladb:
  doc: fix the version in the comment on removing the note
  doc: specify the versions where Alternator TTL is no longer experimental
2023-03-01 11:24:52 +02:00
Botond Dénes
92fde47261 Merge 'test/cql-pytest - aggregation tests' from Nadav Har'El
This small series reorganizes the existing functional tests for aggregation (min, max, count) and adds additional tests for sum reproducing the strange (but Cassandra-compatible) behavior described in issue #13027.

Closes #13038

* github.com:scylladb/scylladb:
  cql-pytest: add tests for sum() aggregate
  test/cql-pytest: move aggregation tests to one file
2023-03-01 11:02:08 +02:00
Avi Kivity
6822e3b88a query_id: extract into new header
query_id currently lives query-request.hh, a busy place
with lots of dependencies. In turn it gets pulled by
uuid.idl.hh, which is also very central. This makes
test/raft/randomized_nemesis_test.cc which is nominally
only dependent on Raft rebuild on random header file changes.

Fix by extracting into a new header.

Closes #13042
2023-03-01 10:25:25 +02:00
Botond Dénes
46efdfa1a1 Merge 'readers/nonforwarding: don't emit partition_end on next_partition,fast_forward_to' from Gusev Petr
The series fixes the `make_nonforwardable` reader, it shouldn't emit `partition_end` for previous partition after `next_partition()` and `fast_forward_to()`

Fixes: #12249

Closes #12978

* github.com:scylladb/scylladb:
  flat_mutation_reader_test: cleanup, seastar::async -> SEASTAR_THREAD_TEST_CASE
  make_nonforwardable: test through run_mutation_source_tests
  make_nonforwardable: next_partition and fast_forward_to when single_partition is true
  make_forwardable: fix next_partition
  flat_mutation_reader_v2: drop forward_buffer_to
  nonforwardable reader: fix indentation
  nonforwardable reader: refactor, extract reset_partition
  nonforwardable reader: add more tests
  nonforwardable reader: no partition_end after fast_forward_to()
  nonforwardable reader: no partition_end after next_partition()
  nonforwardable reader: no partition_end for empty reader
  row_cache: pass partition_start though nonforwardable reader
2023-03-01 09:58:14 +02:00
Botond Dénes
1c0b47ee9b Merge 'treewide: remove unused variable and reference used one explicitly' from Kefu Chai
- treewide: do not define/capture unused variables
- sstables/sstables: mark dummy variable for loop [[maybe_unused]]
- util/result_try: reference this explicitly
- raft: reference this explicitly
- idl-compiler: mark captured this used
- build: reenable unused-{variable,lambda-capture} warnings

Closes #12915

* github.com:scylladb/scylladb:
  build: reenable unused-{variable,lambda-capture} warnings
  test: reader_concurrency_semaphore_test: define target_memory in debug mode
  api::failure_detector: mark set_phi_convict_threshold unimplemented
  test: memtable_test: mark dummy variable for loop [[maybe_unused]]
  idl-compiler: mark captured this used
  raft: reference this explicitly
  util/result_try: reference this explicitly
  sstables/sstables: mark dummy variable for loop [[maybe_unused]]
  treewide: do not define/capture unused variables
  service: storage_service: clear _node_ops in batch
2023-03-01 09:44:37 +02:00
Nadav Har'El
363f326d49 test/cql-pytest: test for CLUSTERING ORDER BY verification in MV
Since commit 73e258fc34, Scylla has partial
verification for the CLUSTERING ORDER BY clause in CREATE MATERIALIZED
VIEW. Specifically, invalid column names are rejected. But for reasons
explained in issue #12936 and in the test in this patch, Cassandra
demands that if CLUSTERING ORDER BY appears it must list all the
clustering columns, with no duplicates, and do so in the right order.

This patch replaces an existing test which suggested it is fine
(an extention over Cassandra) to accept a partial list of clustering
columns, by a test that verifies that such a partial list, or an
incorrectly-ordered list, or list with duplicates, should be rejected.
The new test fails on Scylla, and passes on Cassandra, so marked as xfail.

Refs #12936.

Signed-off-by: Nadav Har'El <nyh@scylladb.com>

Closes #12938
2023-03-01 08:02:39 +02:00
Botond Dénes
84e26ed9c3 Merge 'Enable RBNO by default' from Asias He
This pr fixes the seastar::rpc::closed_error error in the test_topology suite and enables RBNO by default.

Closes #12970

* github.com:scylladb/scylladb:
  Revert "Revert "storage_service: Enable Repair Based Node Operations (RBNO) by default for all node ops""
  storage_service: Wait for normal state handler to finish in replace
  storage_service: Wait for normal state handler to finish in bootstrap
2023-03-01 07:55:46 +02:00
Nadav Har'El
7dc54771e1 test/cql-pytest: allow "run-cassandra" without building Scylla
Before this patch, all scripts which use test/cql-pytest/run.py
looked for the Scylla executable as their first step. This is usually
the right thing to do, except in two cases where Scylla is *not* needed:

1. The script test/cql-pytest/run-cassandra.
2. The script test/alternator/run with the "--aws" option.

So in this patch we change run.py to only look for Scylla when actually
needed (the find_scylla() function is called). In both cases mentioned
above, find_scylla() will never get called and the script can work even
if Scylla was never built.

Signed-off-by: Nadav Har'El <nyh@scylladb.com>

Closes #13010
2023-03-01 07:54:19 +02:00
Botond Dénes
eb10623dd2 Merge 'build: cmake: sync with configure.py (7/n)' from Kefu Chai
- build: cmake: support thrift < 0.11.0
- build: cmake: find Thrift before using it
- build: cmake: find libxcrypt before using it
- build: cmake: expose scylla_gen_build_dir from "interface"
- build: cmake: extract thrift out
- build: cmake: link the whole auth
- build: cmake: extract mutation,db,replica,streaming out

Closes #12990

* github.com:scylladb/scylladb:
  build: cmake: extract mutation,db,replica,streaming out
  build: cmake: link the whole auth
  build: cmake: extract thrift out
  build: cmake: expose scylla_gen_build_dir from "interface"
  build: cmake: find libxcrypt before using it
  build: cmake: find Thrift before using it
  build: cmake: support thrift < 0.11.0
2023-03-01 07:35:21 +02:00
Kefu Chai
f59542a01a build: reenable unused-{variable,lambda-capture} warnings
now that all -Wunused-{variable,lambda-capture} warnings are taken
care of. let's reenable these warnings so they can help us to identify
potential issues.

Signed-off-by: Kefu Chai <kefu.chai@scylladb.com>
2023-03-01 10:45:18 +08:00
Kefu Chai
efe96e7fc6 test: reader_concurrency_semaphore_test: define target_memory in debug mode
otherwise we'd have following warning

```
test/boost/reader_concurrency_semaphore_test.cc:1380:20: error: unused variable 'target_memory' [-Werror,-Wunused-const-variable]
constexpr uint64_t target_memory = uint64_t(1) << 28; // 256MB
                     ^
1 error generated.`
```

Signed-off-by: Kefu Chai <kefu.chai@scylladb.com>
2023-03-01 10:45:18 +08:00
Kefu Chai
ffffcdb48a cql3: mark cf_name final
as `cf_name` is not derived from any class, it's viable
to mark it `final`.

this change is created to to silence the warning from Clang,
like:

```
/home/kefu/.local/bin/clang++ -DDEBUG -DDEBUG_LSA_SANITIZER -DFMT_LOCALE -DFMT_SHARED -DHAVE_LZ4_COMPRESS_DEFAULT -DSANITIZE -DSCYLLA_BUILD_MODE=debug -DSCYLLA_ENABLE_ERROR_INJECTION -DSEASTAR_API_LEVEL=6 -DSEASTAR_DEBUG -DSEASTAR_DEBUG_SHARED_PTR -DSEASTAR_DEFAULT_ALLOCATOR -DSEASTAR_SCHEDULING_GROUPS_COUNT=16 -DSEASTAR_SHUFFLE_TASK_QUEUE -DSEASTAR_TYPE_ERASE_MORE -DXXH_PRIVATE_API -I/home/kefu/dev/scylladb -I/home/kefu/dev/scylladb/build/cmake/gen -I/home/kefu/dev/scylladb/build/cmake -I/home/kefu/dev/scylladb/seastar/include -I/home/kefu/dev/scylladb/build/cmake/seastar/gen/include -Wall -Werror -Wno-mismatched-tags -Wno-missing-braces -Wno-c++11-narrowing  -O0 -g -gz -std=gnu++20 -U_FORTIFY_SOURCE -DSEASTAR_SSTRING -Wno-error=unused-result "-Wno-error=#warnings" -fstack-clash-protection -fsanitize=address -fsanitize=undefined -fno-sanitize=vptr -MD -MT CMakeFiles/scylla.dir/data_dictionary/data_dictionary.cc.o -MF CMakeFiles/scylla.dir/data_dictionary/data_dictionary.cc.o.d -o CMakeFiles/scylla.dir/data_dictionary/data_dictionary.cc.o -c /home/kefu/dev/scylladb/data_dictionary/data_dictionary.cc
In file included from /home/kefu/dev/scylladb/data_dictionary/data_dictionary.cc:9:
In file included from /home/kefu/dev/scylladb/data_dictionary/data_dictionary.hh:11:
/home/kefu/.local/bin/../lib/gcc/x86_64-pc-linux-gnu/13.0.1/../../../../include/c++/13.0.1/optional:287:2: error: destructor called on non-final 'cql3::cf_name' that has virtual functions but non-virtual destructor [-Werror,-Wdelete-non-abstract-non-virtual-dtor]
        _M_payload._M_value.~_Stored_type();
        ^
/home/kefu/.local/bin/../lib/gcc/x86_64-pc-linux-gnu/13.0.1/../../../../include/c++/13.0.1/optional:318:4: note: in instantiation of member function 'std::_Optional_payload_base<cql3::cf_name>::_M_destroy' requested here
          _M_destroy();
          ^
/home/kefu/.local/bin/../lib/gcc/x86_64-pc-linux-gnu/13.0.1/../../../../include/c++/13.0.1/optional:439:57: note: in instantiation of member function 'std::_Optional_payload_base<cql3::cf_name>::_M_reset' requested here
      _GLIBCXX20_CONSTEXPR ~_Optional_payload() { this->_M_reset(); }
                                                        ^
/home/kefu/.local/bin/../lib/gcc/x86_64-pc-linux-gnu/13.0.1/../../../../include/c++/13.0.1/optional:514:17: note: in instantiation of member function 'std::_Optional_payload<cql3::cf_name>::~_Optional_payload' requested here
      constexpr _Optional_base() = default;
                ^
/home/kefu/.local/bin/../lib/gcc/x86_64-pc-linux-gnu/13.0.1/../../../../include/c++/13.0.1/optional:739:17: note: in defaulted default constructor for 'std::_Optional_base<cql3::cf_name>' first required here
      constexpr optional(nullopt_t) noexcept { }
                ^
/home/kefu/dev/scylladb/cql3/statements/raw/batch_statement.hh:37:28: note: in instantiation of member function 'std::optional<cql3::cf_name>::optional' requested here
            : cf_statement(std::nullopt)
                           ^
/home/kefu/.local/bin/../lib/gcc/x86_64-pc-linux-gnu/13.0.1/../../../../include/c++/13.0.1/optional:287:23: note: qualify call to silence this warning
        _M_payload._M_value.~_Stored_type();
                             ^
```

Signed-off-by: Kefu Chai <kefu.chai@scylladb.com>

Closes #13039
2023-02-28 22:26:43 +02:00
Petr Gusev
1709a17c38 flat_mutation_reader_test: cleanup, seastar::async -> SEASTAR_THREAD_TEST_CASE 2023-02-28 23:42:44 +04:00
Petr Gusev
992ccb6255 make_nonforwardable: test through run_mutation_source_tests 2023-02-28 23:42:43 +04:00
Petr Gusev
989ef9d358 make_nonforwardable: next_partition and fast_forward_to when single_partition is true
This flag designates that we should consume only one
partition from the underlying reader. This means that
attempts to move to another partition should cause an EOS.
2023-02-28 23:42:34 +04:00
Petr Gusev
a67776b750 make_forwardable: fix next_partition
When next_partition is called, the buffer could
contain partition_start and possibly static_row.
In this case clear_buffer_to_next_partition will
not remove anything from the buffer and the
reader position should not change. Before this patch,
however, we used to set _end_of_stream=false,
which violated the forwardable-reader
contract - the data of the next partition
was emitted after the data of the first partition
without intermediate EOS.

This bug was found when debugging
test_make_nonforwardable_from_mutations_as_mutation_source flakiness.
A corresponding focused test_make_forwardable_next_partition
has been added to exercise this problem.
2023-02-28 23:11:45 +04:00
Petr Gusev
64427b9164 flat_mutation_reader_v2: drop forward_buffer_to
This is just a strange method I came across.
It effectively does nothing but clear_buffer().
2023-02-28 23:00:02 +04:00
Petr Gusev
a517e1d6ad nonforwardable reader: fix indentation 2023-02-28 23:00:02 +04:00
Petr Gusev
beeffb899f nonforwardable reader: refactor, extract reset_partition
No observable behaviour changes, just refactor
the code.
2023-02-28 23:00:02 +04:00
Petr Gusev
023ed0ad00 nonforwardable reader: add more tests
Add more test cases for completeness.
2023-02-28 23:00:02 +04:00
Petr Gusev
88cd1c3700 nonforwardable reader: no partition_end after fast_forward_to()
This patch fixes the problem with method fast_forward_to
which is similar to the one with next_partition, no
partition_end should be injected for the partition if
fast_forward_to was called inside it.
2023-02-28 23:00:02 +04:00
Petr Gusev
8ff96e1bce nonforwardable reader: no partition_end after next_partition()
Before the patch, nonforwardable reader injected
partition_end unconditionally. This caused problems
in case next_partition() was called, the downstream
reader might have already injected its own
partition_end marker, and the one from nonforwardable
reader was a duplicate.

Fixes: #12249
2023-02-28 23:00:02 +04:00
Petr Gusev
9c5c380b0b nonforwardable reader: no partition_end for empty reader
The patch introduces the _partition_is_open flag,
inject partition_end only if there was some data
in the input reader.

A simple unit test has been added for
the nonforwardable reader which checks this
new behaviour.
2023-02-28 22:59:56 +04:00
Wojciech Mitros
6d2e785b5c docs: update wasm.md
The WASM UDF implementation has changed since the last time the docs
were written. In particular, the Rust helper library has been
released, and using it should be the recommended method.
Some decisions that were only experimental at the start, were also
"set in stone", so we should refer to them as such.

The docs also contain some code examples. This patch adds tests for
these examples to make sure that they are not wrong and misleading.

Closes #12941
2023-02-28 20:59:25 +02:00