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--
-- FLOAT4
--
CREATE TABLE FLOAT4_TBL (f1 float4);
INSERT INTO FLOAT4_TBL(f1) VALUES ('0.0');
INSERT INTO FLOAT4_TBL(f1) VALUES ('1004.30');
INSERT INTO FLOAT4_TBL(f1) VALUES ('-34.84');
INSERT INTO FLOAT4_TBL(f1) VALUES ('1.2345678901234e+20');
INSERT INTO FLOAT4_TBL(f1) VALUES ('1.2345678901234e-20');
-- test for over and under flow
INSERT INTO FLOAT4_TBL(f1) VALUES ('10e40');
ERROR: type "real" value out of range: overflow
INSERT INTO FLOAT4_TBL(f1) VALUES ('-10e40');
ERROR: type "real" value out of range: overflow
INSERT INTO FLOAT4_TBL(f1) VALUES ('10e-40');
ERROR: type "real" value out of range: underflow
INSERT INTO FLOAT4_TBL(f1) VALUES ('-10e-40');
ERROR: type "real" value out of range: underflow
SELECT '' AS five, FLOAT4_TBL.*;
five | f1
------+-------------
| 0
| 1004.3
| -34.84
| 1.23457e+20
| 1.23457e-20
(5 rows)
SELECT '' AS four, f.* FROM FLOAT4_TBL f WHERE f.f1 <> '1004.3';
four | f1
------+-------------
| 0
| -34.84
| 1.23457e+20
| 1.23457e-20
(4 rows)
SELECT '' AS one, f.* FROM FLOAT4_TBL f WHERE f.f1 = '1004.3';
one | f1
-----+--------
| 1004.3
(1 row)
SELECT '' AS three, f.* FROM FLOAT4_TBL f WHERE '1004.3' > f.f1;
three | f1
-------+-------------
| 0
| -34.84
| 1.23457e-20
(3 rows)
SELECT '' AS three, f.* FROM FLOAT4_TBL f WHERE f.f1 < '1004.3';
three | f1
-------+-------------
| 0
| -34.84
| 1.23457e-20
(3 rows)
SELECT '' AS four, f.* FROM FLOAT4_TBL f WHERE '1004.3' >= f.f1;
four | f1
------+-------------
| 0
| 1004.3
| -34.84
| 1.23457e-20
(4 rows)
SELECT '' AS four, f.* FROM FLOAT4_TBL f WHERE f.f1 <= '1004.3';
four | f1
------+-------------
| 0
| 1004.3
| -34.84
| 1.23457e-20
(4 rows)
SELECT '' AS three, f.f1, f.f1 * '-10' AS x FROM FLOAT4_TBL f
WHERE f.f1 > '0.0';
three | f1 | x
-------+-------------+--------------
| 1004.3 | -10043
| 1.23457e+20 | -1.23457e+21
| 1.23457e-20 | -1.23457e-19
(3 rows)
SELECT '' AS three, f.f1, f.f1 + '-10' AS x FROM FLOAT4_TBL f
WHERE f.f1 > '0.0';
three | f1 | x
-------+-------------+-------------
| 1004.3 | 994.3
| 1.23457e+20 | 1.23457e+20
| 1.23457e-20 | -10
(3 rows)
SELECT '' AS three, f.f1, f.f1 / '-10' AS x FROM FLOAT4_TBL f
WHERE f.f1 > '0.0';
three | f1 | x
-------+-------------+--------------
| 1004.3 | -100.43
| 1.23457e+20 | -1.23457e+19
| 1.23457e-20 | -1.23457e-21
(3 rows)
SELECT '' AS three, f.f1, f.f1 - '-10' AS x FROM FLOAT4_TBL f
WHERE f.f1 > '0.0';
three | f1 | x
-------+-------------+-------------
| 1004.3 | 1014.3
| 1.23457e+20 | 1.23457e+20
| 1.23457e-20 | 10
(3 rows)
-- test divide by zero
SELECT '' AS bad, f.f1 / '0.0' from FLOAT4_TBL f;
ERROR: division by zero
SELECT '' AS five, FLOAT4_TBL.*;
five | f1
------+-------------
| 0
| 1004.3
| -34.84
| 1.23457e+20
| 1.23457e-20
(5 rows)
-- test the unary float4abs operator
SELECT '' AS five, f.f1, @f.f1 AS abs_f1 FROM FLOAT4_TBL f;
five | f1 | abs_f1
------+-------------+-------------
| 0 | 0
| 1004.3 | 1004.3
| -34.84 | 34.84
| 1.23457e+20 | 1.23457e+20
| 1.23457e-20 | 1.23457e-20
(5 rows)
UPDATE FLOAT4_TBL
SET f1 = FLOAT4_TBL.f1 * '-1'
WHERE FLOAT4_TBL.f1 > '0.0';
SELECT '' AS five, FLOAT4_TBL.*;
five | f1
------+--------------
| 0
| -34.84
| -1004.3
| -1.23457e+20
| -1.23457e-20
(5 rows)
|
