postgresql

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Tomas Vondra 31f3817402 Allow COPY FROM to filter data using WHERE conditions Extends the COPY FROM command with a WHERE condition, which allows doing various types of filtering while importing the data (random sampling, condition on a data column, etc.). Until now such filtering required either preprocessing of the input data, or importing all data and then filtering in the database. COPY FROM ... WHERE is an easy-to-use and low-overhead alternative for most simple cases. Author: Surafel Temesgen Reviewed-by: Tomas Vondra, Masahiko Sawada, Lim Myungkyu Discussion: https://www.postgresql.org/message-id/flat/CALAY4q_DdpWDuB5-Zyi-oTtO2uSk8pmy+dupiRe3AvAc++1imA@mail.gmail.com		2019-01-20 00:22:14 +01:00
..
compatlib	Update copyright for 2019	2019-01-02 12:44:25 -05:00
ecpglib	Update copyright for 2019	2019-01-02 12:44:25 -05:00
include	Fix more wrong paths in header comments	2018-07-11 17:57:04 +03:00
pgtypeslib	Update copyright for 2019	2019-01-02 12:44:25 -05:00
preproc	Allow COPY FROM to filter data using WHERE conditions	2019-01-20 00:22:14 +01:00
test	Ensure link commands list *.o files before LDFLAGS.	2019-01-02 13:57:54 -05:00
Makefile	Fix parallel make risk with new check temp-install setup	2015-04-29 20:34:22 -04:00
README.dynSQL	Fix whitespace issues found by git diff --check, add gitattributes	2013-11-10 14:48:29 -05:00

README.dynSQL

src/interfaces/ecpg/README.dynSQL

descriptor statements have the following shortcomings

- input descriptors (USING DESCRIPTOR <name>) are not supported

  Reason: to fully support dynamic SQL the frontend/backend communication
          should change to recognize input parameters.
          Since this is not likely to happen in the near future and you
          can cover the same functionality with the existing infrastructure
          (using s[n]printf), I'll leave the work to someone else.