database/postgres
1
0
Fork 0
mirror of https://github.com/postgres/postgres.git synced 2025-07-27 12:41:57 +03:00
Code Activity

Provide a FORCE NULL option to COPY in CSV mode.

Browse Source 
This forces an input field containing the quoted null string to be
returned as a NULL. Without this option, only unquoted null strings
behave this way. This helps where some CSV producers insist on quoting
every field, whether or not it is needed. The option takes a list of
fields, and only applies to those columns. There is an equivalent
column-level option added to file_fdw.

Ian Barwick, with some tweaking by Andrew Dunstan, reviewed by Payal
Singh.
This commit is contained in:
Andrew Dunstan
2014-03-04 17:31:59 -05:00
parent e2a0fc5363
commit 3b5e03dca2
10 changed files with 308 additions and 35 deletions
Download Patch File Download Diff File Expand all files Collapse all files

17
contrib/file_fdw/input/file_fdw.source
View File

@ -81,11 +81,14 @@ OPTIONS (format 'csv', filename '@abs_srcdir@/data/agg.bad', header 'true', deli
-- per-column options tests
CREATE FOREIGN TABLE text_csv (
word1 text OPTIONS (force_not_null 'true'),
word2 text OPTIONS (force_not_null 'off')
word2 text OPTIONS (force_not_null 'off'),
word3 text OPTIONS (force_null 'true'),
word4 text OPTIONS (force_null 'off')
) SERVER file_server
OPTIONS (format 'text', filename '@abs_srcdir@/data/text.csv', null 'NULL');
SELECT * FROM text_csv; -- ERROR
ALTER FOREIGN TABLE text_csv OPTIONS (SET format 'csv');
\pset null _null_
SELECT * FROM text_csv;
-- force_not_null is not allowed to be specified at any foreign object level:
@ -94,6 +97,18 @@ ALTER SERVER file_server OPTIONS (ADD force_not_null '*'); -- ERROR
CREATE USER MAPPING FOR public SERVER file_server OPTIONS (force_not_null '*'); -- ERROR
CREATE FOREIGN TABLE tbl () SERVER file_server OPTIONS (force_not_null '*'); -- ERROR
-- force_not_null cannot be specified together with force_null
ALTER FOREIGN TABLE text_csv ALTER COLUMN word1 OPTIONS (force_null 'true'); --ERROR
-- force_null is not allowed to be specified at any foreign object level:
ALTER FOREIGN DATA WRAPPER file_fdw OPTIONS (ADD force_null '*'); -- ERROR
ALTER SERVER file_server OPTIONS (ADD force_null '*'); -- ERROR
CREATE USER MAPPING FOR public SERVER file_server OPTIONS (force_null '*'); -- ERROR
CREATE FOREIGN TABLE tbl () SERVER file_server OPTIONS (force_null '*'); -- ERROR
-- force_null cannot be specified together with force_not_null
ALTER FOREIGN TABLE text_csv ALTER COLUMN word3 OPTIONS (force_not_null 'true'); --ERROR
-- basic query tests
SELECT * FROM agg_text WHERE b > 10.0 ORDER BY a;
SELECT * FROM agg_csv ORDER BY a;