Four* Major Database Releases of 2017 in Review

Four New Major Releases in ReviewMariaDB, SQL Server, PostgreSQL, (MySQL)

ViennaDB - 2018-01-17 @MarkusWinand

2018

MariaDB 10.2SQL Server 2017 PostgreSQL 10

MySQL 8.0???

2017

2018

MariaDB 10.2SQL Server 2017 PostgreSQL 10

MySQL 8.0???

Percona Live Amsterdam 2016:Already mentioned MySQL 8.0

https://twitter.com/MarkusWinand/status/852862475699707904

Conformance test of MySQL 8.0.1 for the WITH clause:

2017

MariaDB 10.2GA release 2017-05-23

A little bit of history‣MariaDB was founded by the creator of MySQL in 2009(because Sun was bought by Oracle)‣MariaDB aimed for feature compatibility until 2012(last feature compatible version was 5.5)‣Next major version was 10 (still in 2012)(to indicate it has not the same features as MySQL 5.6)‣Release 10.2 adds window functions and the WITH clauseAt the same time: MySQL 8.0 is under development—also announcing window functions and the WITH clause.

MariaDB 10.2 May 2017

MariaDB won the race to introducewindow functions and

the WITH clause with release 10.2 in May 2017.

(MySQL 8.0 is not yet released for production) (as of 2018-01-15)

MariaDB 10.2 Released May 2017

But how about the quality?

How is MariaDB 10.2 doing in my conformance test? WITH (non recursive)

MariaDB 10.2.12 vs. MySQL 8.0.3


How is MariaDB 10.2 doing in my conformance test? WITH RECURSIVE



Window FunctionsMariaDB 10.2.12 vs. MySQL 8.0.3


MariaDB 10.2 Released May 2017(standard) JSON functions


Note: MariaDB 10.1 has none of these features (everything X) Description of the features: http://modern-sql.com/blog/2017-06/whats-new-in-sql-2016

http://modern-sql.com/blog/2017-06/whats-new-in-sql-2016

MariaDB 10.2 Released May 2017(standard) JSON functions


Note: MariaDB 10.1 has none of these features (everything X)

MariaDB 10.2 Released May 2017CHECK constraints


Note: MariaDB 10.1 works like MySQL 8.0.3:syntax is accepted, but constraint not validated.

Other topics: ‣ NO PAD collations ‣ Expressions in DEFAULT clause, DEFAULT for BLOB and TEXT

https://mariadb.com/kb/en/library/changes-improvements-in-mariadb-102/


SQL Server 2017 (v14)Released 2017-10-02

Although SQL Server 2016 was supposed to be available on Linux, it never became available on public channels.

SQL Server 2017 had a public beta and can be installed throughregular package managers.

A free developer license is available.

SQL Server 2017 Released Oct 2017TRIM function

Why would you introduce a function from the standard partially?

SQL Server 2017 Released Oct 2017STRING_AGG function

The SQL standard has listagg for this purpose:

A string_agg function is available in PostgreSQL —but with a different syntax! (placement of orderby differs)

Double Fail!

Some other topics:

‣ Batch mode adaptive joins Decide to use nested loops or hash join during execution (like Oracle’s adaptive joins, but more limited). ‣ Graph processing capabilities a match clause that reminds one of the Cypher Query Language.

https://docs.microsoft.com/en-us/sql/database-engine/whats-new-in-sql-server-2017

SQL Server 2017 Released Oct 2017

https://docs.microsoft.com/en-us/sql/database-engine/whats-new-in-sql-server-2017

PostgreSQL 10Released 2017-10-05

XMLTABLE IDENTITY columns (basic support, not tested thoroughly) (possibly buggy as of 10.1)

PostgreSQL 10 Released Oct 2017

Suspected bug: each row insertedconsumes two values (one is lost)

Some other topics:

‣ Parallel query improvements Merge Join, Bitmap Heap Scan, Index [Only] Scan, and more. ‣ Multi-column optimizer statistics The optimizer understands cross column correlations. ‣ ICU collations Operating system independent rules for comparing character strings.

https://www.postgresql.org/docs/10/static/release-10.html

PostgreSQL 10 Released Oct 2017

MySQL 8.0No GA release yet

RC1: 8.0.3 (2017-09-21)

Window functions and with clause (see MariaDB 10.2).

Other topics: ‣ DESC indexes (!!!!) Similar to check constraints, MySQL accepted desc in indexes but ignored it. ‣new JSON functions (but no new SQL standard JSON functionality)

https://dev.mysql.com/doc/refman/8.0/en/mysql-nutshell.html

MySQL 8.0 No GA release yet

About @MarkusWinand

About @MarkusWinand

‣Training for Developers ‣ SQL Performance (Indexing) ‣ Modern SQL ‣ On-Site or Online

‣SQL Tuning ‣ Index-Redesign ‣ Query Improvements ‣ On-Site or Online

https://winand.at/

About @MarkusWinand



About @MarkusWinand



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Four* Major Database Releases of 2017 in Review