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Four* Major Database Releases of 2017 in Review

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*Actually only three because MySQL 8.0 was not released GA in 2017.

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Four* Major Database Releases of 2017 in Review

  1. 1. Four New Major Releases in Review MariaDB, SQL Server, PostgreSQL, (MySQL) ViennaDB - 2018-01-17 @MarkusWinand
  2. 2. 2018 MariaDB 10.2 SQL Server 2017 PostgreSQL 10 MySQL 8.0??? 2017
  3. 3. 2018 MariaDB 10.2 SQL 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
  4. 4. MariaDB 10.2 GA release 2017-05-23
  5. 5. 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 clause
 At the same time: MySQL 8.0 is under development—also announcing window functions and the WITH clause. MariaDB 10.2 May 2017
  6. 6. MariaDB won the race to introduce
 window 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?
  7. 7. How is MariaDB 10.2 doing in my conformance test? WITH (non recursive) MariaDB 10.2.12 vs. MySQL 8.0.3 MariaDB 10.2 Released May 2017
  8. 8. How is MariaDB 10.2 doing in my conformance test? WITH RECURSIVE MariaDB 10.2.12 vs. MySQL 8.0.3 MariaDB 10.2 Released May 2017
  9. 9. Window Functions MariaDB 10.2.12 vs. MySQL 8.0.3 MariaDB 10.2 Released May 2017
  10. 10. MariaDB 10.2 Released May 2017 (standard) JSON functions MariaDB 10.2.12 vs. MySQL 8.0.3 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
  11. 11. MariaDB 10.2 Released May 2017 (standard) JSON functions MariaDB 10.2.12 vs. MySQL 8.0.3 Note: MariaDB 10.1 has none
 of these features (everything X)
  12. 12. MariaDB 10.2 Released May 2017 CHECK constraints MariaDB 10.2.12 vs. MySQL 8.0.3 Note: MariaDB 10.1 works like MySQL 8.0.3:
 syntax is accepted, but constraint not validated.
  13. 13. 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/ MariaDB 10.2 Released May 2017
  14. 14. SQL Server 2017 (v14) Released 2017-10-02
  15. 15. 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 through
 regular package managers. A free developer license is available.
  16. 16. SQL Server 2017 Released Oct 2017 TRIM function Why would you introduce a function from the standard partially?
  17. 17. SQL Server 2017 Released Oct 2017 STRING_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 order by differs) Double Fail!
  18. 18. 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
  19. 19. PostgreSQL 10 Released 2017-10-05
  20. 20. XMLTABLE IDENTITY columns (basic support, not tested thoroughly) (possibly buggy as of 10.1) PostgreSQL 10 Released Oct 2017 Suspected bug: each row inserted
 consumes two values (one is lost)
  21. 21. 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
  22. 22. MySQL 8.0 No GA release yet
 RC1: 8.0.3 (2017-09-21)
  23. 23. 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
  24. 24. About @MarkusWinand
  25. 25. 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/
  26. 26. About @MarkusWinand
  27. 27. About @MarkusWinand sql-performance-explained.com
  28. 28. About @MarkusWinand €0,- €10-30 sql-performance-explained.com
  29. 29. About @MarkusWinand @ModernSQL http://modern-sql.com

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