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Vladimir Davydov authored
The read iterator skips DELETE statements. If a skipped DELETE statement
was read from the transaction write set, the read iterator breaks the
current cache chain by clearing vy_read_iterator::last_cached, because
the deleted tuple may actually be present at a lower level so adding
a gap there until the transaction is committed would be incorrect, see
commit dd926790 ("vinyl: fix a bug in adding of a cache chain").

The problem is vy_cache_add() assumes that if last_cached is NULL
the tuple added to the cache must be the first tuple that meets the
iteration criteria and sets the cache node boundary level accordingly.
This may lead to the previous tuple being erroneously skipped later
in case the transaction that attempted to delete it is rolled back.

Fix this issue by passing the flag indicating if the current tuple is
the first result of the iteration explicitly to vy_cache_add().

Closes #7947

NO_DOC=bug fix
e00f16e4
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Tarantool

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Tarantool is an in-memory computing platform consisting of a database and an application server.

It is distributed under BSD 2-Clause terms.

Key features of the application server:

Key features of the database:

  • MessagePack data format and MessagePack based client-server protocol.
  • Two data engines: 100% in-memory with complete WAL-based persistence and an own implementation of LSM-tree, to use with large data sets.
  • Multiple index types: HASH, TREE, RTREE, BITSET.
  • Document oriented JSON path indexes.
  • Asynchronous master-master replication.
  • Synchronous quorum-based replication.
  • RAFT-based automatic leader election for the single-leader configuration.
  • Authentication and access control.
  • ANSI SQL, including views, joins, referential and check constraints.
  • Connectors for many programming languages.
  • The database is a C extension of the application server and can be turned off.

Supported platforms are Linux (x86_64, aarch64), Mac OS X (x86_64, M1), FreeBSD (x86_64).

Tarantool is ideal for data-enriched components of scalable Web architecture: queue servers, caches, stateful Web applications.

To download and install Tarantool as a binary package for your OS or using Docker, please see the download instructions.

To build Tarantool from source, see detailed instructions in the Tarantool documentation.

To find modules, connectors and tools for Tarantool, check out our Awesome Tarantool list.

Please report bugs to our issue tracker. We also warmly welcome your feedback on the discussions page and questions on Stack Overflow.

We accept contributions via pull requests. Check out our contributing guide.

Thank you for your interest in Tarantool!