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Add some regression test cases for denormalized float8 input.

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This was submitted with the previous patch, but I'm committing it
separately to ease backing it out if these results prove too unportable.

Marti Raudsepp, after a proposal by Jeroen Vermeulen
This commit is contained in:
Tom Lane
2012-02-01 13:13:54 -05:00
parent c318aeed84
commit 500cf66d55
5 changed files with 81 additions and 0 deletions
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19
src/test/regress/expected/float8-exp-three-digits-win32.out
View File

@ -24,6 +24,25 @@ SELECT '-10e-400'::float8;
ERROR: "-10e-400" is out of range for type double precision
LINE 1: SELECT '-10e-400'::float8;
^
-- test whether denormalized values are accepted
SELECT '4.95e-324'::float8 < '1.49e-323'::float8;
?column?
----------
t
(1 row)
SELECT '4.95e-324'::float8 > '0'::float8;
?column?
----------
t
(1 row)
SELECT substr('-4.95e-324'::float8::text, 1, 4);
substr
--------
-4.9
(1 row)
-- bad input
INSERT INTO FLOAT8_TBL(f1) VALUES ('');
ERROR: invalid input syntax for type double precision: ""

19
src/test/regress/expected/float8-small-is-zero.out
View File

@ -24,6 +24,25 @@ SELECT '10e-400'::float8;
SELECT '-10e-400'::float8;
float8
-- test whether denormalized values are accepted
SELECT '4.95e-324'::float8 < '1.49e-323'::float8;
?column?
----------
t
(1 row)
SELECT '4.95e-324'::float8 > '0'::float8;
?column?
----------
t
(1 row)
SELECT substr('-4.95e-324'::float8::text, 1, 4);
substr
--------
-4.9
(1 row)
--------
-0
(1 row)

19
src/test/regress/expected/float8-small-is-zero_1.out
View File

@ -24,6 +24,25 @@ SELECT '10e-400'::float8;
SELECT '-10e-400'::float8;
float8
-- test whether denormalized values are accepted
SELECT '4.95e-324'::float8 < '1.49e-323'::float8;
?column?
----------
t
(1 row)
SELECT '4.95e-324'::float8 > '0'::float8;
?column?
----------
t
(1 row)
SELECT substr('-4.95e-324'::float8::text, 1, 4);
substr
--------
-4.9
(1 row)
--------
0
(1 row)

19
src/test/regress/expected/float8.out
View File

@ -24,6 +24,25 @@ SELECT '-10e-400'::float8;
ERROR: "-10e-400" is out of range for type double precision
LINE 1: SELECT '-10e-400'::float8;
^
-- test whether denormalized values are accepted
SELECT '4.95e-324'::float8 < '1.49e-323'::float8;
?column?
----------
t
(1 row)
SELECT '4.95e-324'::float8 > '0'::float8;
?column?
----------
t
(1 row)
SELECT substr('-4.95e-324'::float8::text, 1, 4);
substr
--------
-4.9
(1 row)
-- bad input
INSERT INTO FLOAT8_TBL(f1) VALUES ('');
ERROR: invalid input syntax for type double precision: ""

5
src/test/regress/sql/float8.sql
View File

@ -16,6 +16,11 @@ SELECT '-10e400'::float8;
SELECT '10e-400'::float8;
SELECT '-10e-400'::float8;
-- test whether denormalized values are accepted
SELECT '4.95e-324'::float8 < '1.49e-323'::float8;
SELECT '4.95e-324'::float8 > '0'::float8;
SELECT substr('-4.95e-324'::float8::text, 1, 4);
-- bad input
INSERT INTO FLOAT8_TBL(f1) VALUES ('');
INSERT INTO FLOAT8_TBL(f1) VALUES (' ');