[groonga-talk:364] [ANN] Groonga 7.0.4

[Kentaro H. <ha...@cl...>]

Hi,

Groonga 7.0.4 has been released!
  http://groonga.org/docs/news.html#release-7-0-4

  Install: http://groonga.org/docs/install.html
  Characteristics:  http://groonga.org/docs/characteristic.html

The topics in this release:

  * Supported Debian 9 (stretch)
  * Improved grndb functionality
  * Improved performance of executing query

## Supported Debian 9 (stretch)

In this release, Debian 9 (stretch) has been supported!

Now install documentation is out for Debian 9 (stretch) users.

  http://groonga.org/docs/install/debian.html#stretch

## Improved grndb functionality

In this release, log options are supported for grndb.

grndb is a tool for maintenance Groonga database. It provides grndb
check and grndb recover. But in the previous versions, grndb doesn't
support logging options.

Use supported --log-level and --log-path option to save grndb logs.

It also supports grndb recover --force-truncate option.  It try to
recover database by truncating corrupted object. Note that you need to
load truncated data again.

## Improved performance of executing query

In this release, some query performance is improved. Here are some
improved patterns.

* FIXED_SIZED_COLUMN OPERATOR CONSTANT

  Improved performance by reducing redundant process when accessing
  column data. Supported operators are ==, !=, <, >, <= and >=.

* in_records()

  Improved performance by reducing too many object creation. To avoid
  such a situation, implementation is switched from mruby to C.

### Improvements

* Added physical create/delete operation logs to identify problem for
  troubleshooting. [GitHub#700,#701]

* [in_records] Improved performance for fixed sized column. It may
  reduce 50% execution time.

* [grndb] Added --log-path option. [GitHub#702,#703]

* [grndb] Added --log-level option. [GitHub#706,#708]

* Added the following API

  * grn_operator_to_exec_func()
  * grn_obj_is_corrupt()

* Improved performance for "FIXED_SIZE_COLUMN OP CONSTANT". Supported
  operators are: ==, !=, <, >, <= and >=.

* Improved performance for "COLUMN OP VALUE && COLUMN OP VALUE &&
  ...".

* [grndb] Supported corrupted object detection with grndb check.

* [io_flush] Supported --only_opened option which enables to flush
  only opened database objects.

* [grndb] Supported to detect/delete orphan "inspect" object. The
  orphaned "inspect" object is created by renamed command name from
  inspect to object_inspect.

## Fixes

* [rpm][centos] Fixed unexpected macro expansion problem with
  customized build. This bug only affects when rebuilding Groonga SRPM
  with customized additional_configure_options parameter in spec file.

* Fixed missing null check for grn_table_setoperation(). There is a
  possibility of crash bug when indexes are broken. [GitHub#699]


-- 
Kentaro Hayashi <ha...@cl...>