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copy: update docs for FORCE_NULL and FORCE_NOT_NULL combination

Browse Source 
Also update regression tests

Patch by Michael Paquier
This commit is contained in:
Bruce Momjian
2014-04-22 16:06:37 -04:00
parent 4a5d55ec2b
commit 7ec73783d8
6 changed files with 24 additions and 34 deletions
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10
src/test/regress/expected/copy2.out
View File

@@ -383,7 +383,6 @@ SELECT * FROM vistest;
(2 rows)
-- Test FORCE_NOT_NULL and FORCE_NULL options
-- should succeed with "b" set to an empty string and "c" set to NULL
CREATE TEMP TABLE forcetest (
a INT NOT NULL,
b TEXT NOT NULL,
@@ -392,6 +391,7 @@ CREATE TEMP TABLE forcetest (
e TEXT
);
\pset null NULL
-- should succeed with no effect ("b" remains an empty string, "c" remains NULL)
BEGIN;
COPY forcetest (a, b, c) FROM STDIN WITH (FORMAT csv, FORCE_NOT_NULL(b), FORCE_NULL(c));
COMMIT;
@@ -401,12 +401,12 @@ SELECT b, c FROM forcetest WHERE a = 1;
| NULL
(1 row)
-- should succeed with no effect ("b" remains an empty string, "c" remains NULL)
-- should succeed, FORCE_NULL and FORCE_NOT_NULL can be both specified
BEGIN;
COPY forcetest (a, b, c) FROM STDIN WITH (FORMAT csv, FORCE_NOT_NULL(b), FORCE_NULL(c));
COPY forcetest (a, b, c, d) FROM STDIN WITH (FORMAT csv, FORCE_NOT_NULL(c,d), FORCE_NULL(c,d));
COMMIT;
SELECT b, c FROM forcetest WHERE a = 2;
b | c
SELECT c, d FROM forcetest WHERE a = 2;
c | d
---+------
| NULL
(1 row)

10
src/test/regress/sql/copy2.sql
View File

@@ -271,7 +271,6 @@ SELECT * FROM vistest;
COMMIT;
SELECT * FROM vistest;
-- Test FORCE_NOT_NULL and FORCE_NULL options
-- should succeed with "b" set to an empty string and "c" set to NULL
CREATE TEMP TABLE forcetest (
a INT NOT NULL,
b TEXT NOT NULL,
@@ -280,19 +279,20 @@ CREATE TEMP TABLE forcetest (
e TEXT
);
\pset null NULL
-- should succeed with no effect ("b" remains an empty string, "c" remains NULL)
BEGIN;
COPY forcetest (a, b, c) FROM STDIN WITH (FORMAT csv, FORCE_NOT_NULL(b), FORCE_NULL(c));
1,,""
\.
COMMIT;
SELECT b, c FROM forcetest WHERE a = 1;
-- should succeed with no effect ("b" remains an empty string, "c" remains NULL)
-- should succeed, FORCE_NULL and FORCE_NOT_NULL can be both specified
BEGIN;
COPY forcetest (a, b, c) FROM STDIN WITH (FORMAT csv, FORCE_NOT_NULL(b), FORCE_NULL(c));
2,,""
COPY forcetest (a, b, c, d) FROM STDIN WITH (FORMAT csv, FORCE_NOT_NULL(c,d), FORCE_NULL(c,d));
2,'a',,""
\.
COMMIT;
SELECT b, c FROM forcetest WHERE a = 2;
SELECT c, d FROM forcetest WHERE a = 2;
-- should fail with not-null constraint violation
BEGIN;
COPY forcetest (a, b, c) FROM STDIN WITH (FORMAT csv, FORCE_NULL(b), FORCE_NOT_NULL(c));