The document discusses PostgreSQL's support for accessing remote data sources using SQL/MED. It describes how PostgreSQL has evolved from only supporting reads of remote data in early versions to now supporting both reads and writes in version 9.3 using various foreign data wrappers. These wrappers allow querying and manipulating data from databases like Oracle and MySQL, NoSQL sources like CouchDB and Redis, and other sources such as files, Twitter, and S3. The capabilities are expected to continue expanding in the future with full SQL/MED compliance and additional introspection features.

1. Intergalactic Dataspeak
Highload++ 2013/10/28
Copyright© 2013
David Fetter david.fetter@disqus.com
All rights reserved.

2. SQL
Everywhere!

5. Virtual
Table Interface

6. Virtual
Index Interface

7. SQL/MED

8. <DIGRESSION>

9. EXTENSIONS!

10. </DIGRESSION>

11. <PAST>

12. SQL/MED in PostgreSQL
contrib/dblink

13. SQL/MED in PostgreSQL
DBI-Link

14. Time Passes...

15. PostgreSQL 8.4

16. Infrastructure Only

17. PostgreSQL 9.0

18. More Infrastructure

19. PostgreSQL 9.2

20. Reads
ANALYZE
ANALYZE

21. </PAST>

22. <PRESENT>

23. A Disqus Hour
• 50 GB raw log data
• 30 GB event data
• 100 million embed loads
• ...last week.

24. PostgreSQL 9.3

25. WRITES!

26. Wrappers. Lots of Wrappers.

27. <SQL>

28. Oracle

29. MySQL

30. ODBC

31. </SQL>

32. <NoSQL>

33. CouchDB

34. Redis

35. </NoSQL>

36. <File>

37. file

38. file_text_array

39. </File>

40. <Creativity>

41. Twitter

42. LDAP

43. S3

44. </Creativity>

45. More!

46. PGXN

47. Multicorn

48. <New_Commands>

49. {CREATE | ALTER | DROP}
FOREIGN DATA WRAPPER
FOREIGN DATA WRAPPER

50. {CREATE | ALTER | DROP}
SERVER
SERVER

51. {CREATE | ALTER | DROP}
USER MAPPING
USER MAPPING

52. </New_Commands>

53. <INTROSPECTION>

54. Remote Partitioning
• Expose information_schema.columns.
• Create view over them.
• Create foreign table generator.

55. </INTROSPECTION>

56. </PRESENT>

57. <FUTURE>

58. <INTROSPECTION>

59. CREATE FOREIGN TABLE

60. More and better.

61. </INTROSPECTION>

62. Full SQL/MED
Compliance

63. The ever-interesting:
Stuff I Never Thought Of

64. </FUTURE>

65. Большое
спасибо!
Highload++ 2013/10/28
Copyright© 2013
David Fetter david.fetter@disqus.com
All rights reserved.