I have a database in PG 7.1.3 with the following schema:
db02=# \d ellipse Table "ellipse" Attribute | Type | Modifier
--------------------------+--------------+----------subject | text | arm
|character(1) | rep | integer | exp_date | date | exp_time
| time | success | integer | figure_radius | integer | tube_radius
| integer | cursor_radius | integer | direction | integer |
ellipse_ratio | real | exag_ratio | real | exag_start | integer
| exag_end | integer | rotation_angle | real | min_inter_trial_interval |
integer |
Index: pkellipse
If I try the command:
db02=# select distinct arm from ellipse where exag_ratio = 1.0;arm
-----LR
(2 rows)
which is correct.
Now I try the same command with a different 'real' field:
db02=# select distinct arm from ellipse where ellipse_ratio = 1.8;arm
-----
(0 rows)
BUT, if I put the value in quotes (as if it were a string), I get:
db02=# select distinct arm from ellipse where ellipse_ratio = '1.8';arm
-----LR
(2 rows)
which is correct.
This variable ellipse_ratio seems to be the only one of type 'real'
that requires me to use quotes (which doesn't really make sense since
it's not a character or string anyway). exag_ratio and rotation_angle
behave as I would expect a real-typed variable to behave.
db02=# select distinct exag_ratio, ellipse_ratio, rotation_angle from
ellipse;exag_ratio | ellipse_ratio | rotation_angle
------------+---------------+---------------- 1 | 0.56 | 0 1 | 1.8 |
0
(2 rows)
Has anyone seen this behavior before? Perhaps, I'm doing something
wrong here or thinking of this all wrong?
Thanks.
-Tony Reina
Welcome to psql, the PostgreSQL interactive terminal.
Type: \copyright for distribution terms \h for help with SQL commands \? for help on internal slash commands
\g or terminate with semicolon to execute query \q to quit
db02=# select version(); version
-------------------------------------------------------------PostgreSQL 7.1.3 on i686-pc-linux-gnu, compiled by GCC
2.96
(1 row)
PG server is RH Linux 7.1 (Seawolf), PIII 400 MHz
Vacuum verbose analyze performed just prior to the searches listed
just to be sure.
