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All new CUBRID 9.2.0 with new SQL support, performance improvements, and more


Last month we announced CUBRID 8.4.4, the latest version of 8.4.x branch, with new SQL Profiling feature and numerous stability improvements. Today I am excited to announce an update to the 9.x branch - all new CUBRID 9.2.0.

Most new features and stability improvements of the latest 8.4.4 version have been applied to CUBRID 9.2.0 as well. However, there are several more new features and performance improvements in 9.2.0 that I will describe below.

You can download the latest version of CUBRID 9.2.0 for Windows and Linux from

New Features

SQL profiling

Prior to 8.4.4 and 9.2.0 users could obtain SQL profiling information to analyze the query performance only in desktop GUI applications like CUBRID Manager or CUBRID Query Browser. Now CUBRID allows to retrieve SQL profiling information directly from drivers. To enable the SQL profiling one can execute SET TRACE ON before executing the query, then retrieve the query plan and statistics by executing SHOW TRACE query. See the following example:

csql> SELECT /*+ RECOMPILE */ o.host_year, o.host_nation, o.host_city,, SUM(, SUM(p.silver), SUM(p.bronze)
        WHERE o.host_year = p.host_year AND p.nation_code = n.code AND > 10
        GROUP BY o.host_nation;

Query Plan:
  SORT (group by)
    NESTED LOOPS (inner join)
      NESTED LOOPS (inner join)
        TABLE SCAN (o)
        INDEX SCAN (p.fk_participant_host_year) (key range: (o.host_year=p.host_year))
      INDEX SCAN (n.pk_nation_code) (key range: p.nation_code=n.code)

  rewritten query: select o.host_year, o.host_nation, o.host_city, n.[name], sum(, sum(p.silver), sum(p.bronze) from OLYMPIC o, PARTICIPANT p, NATION n where (o.host_year=p.host_year and p.nation_code=n.code and (> ?:0 )) group by o.host_nation

Trace Statistics:
  SELECT (time: 1, fetch: 1059, ioread: 2)
    SCAN (table: olympic), (heap time: 0, fetch: 26, ioread: 0, readrows: 25, rows: 25)
      SCAN (index: participant.fk_participant_host_year), (btree time: 1, fetch: 945, ioread: 2, readkeys: 5, filteredkeys: 5, rows: 916) (lookup time: 0, rows: 38)
        SCAN (index: nation.pk_nation_code), (btree time: 0, fetch: 76, ioread: 0, readkeys: 38, filteredkeys: 38, rows: 38) (lookup time: 0, rows: 38)
    GROUPBY (time: 0, sort: true, page: 0, ioread: 0, rows: 5)

New SQL syntax

In CUBRID 9.2.0 we have added new SQL functions and statements.


In CUBRID 9.2.0 there are over 140 stability and usability improvements which include the following:

As a result of these improvements, the performance of SELECT operations in CUBRID 9.2.0 has improved by 23%.


Figure 1: Result of SELECT Operation of YCSB Benchmark (Master Server).

For more performance and QA results, refer to CUBRID 9.2.0 QA Completion Report.

Behavioral changes

Some of the functionality in CUBRID 9.2.0 have been changed.

Besides these improvements and behavioral changes, there are many bug fixes and minor improvements in resource management. For the full list refer to CUBRID 9.2.0 Release Notes.

If you would like to migrate from previous version to the latest CUBRID 9.2.0, please refer to Upgrading to CUBRID 9.2.0.

If you have any questions, feel free to leave your comment below.

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