| 1.2345678901234e-200 | 0
(5 rows)
+-- ceil
+select ceil(f1) as ceil_f1 from float8_tbl f;
+ ceil_f1
+----------------------
+ 0
+ 1005
+ -34
+ 1.2345678901234e+200
+ 1
+(5 rows)
+
+-- floor
+select floor(f1) as floor_f1 from float8_tbl f;
+ floor_f1
+----------------------
+ 0
+ 1004
+ -35
+ 1.2345678901234e+200
+ 0
+(5 rows)
+
+-- sign
+select sign(f1) as sign_f1 from float8_tbl f;
+ sign_f1
+---------
+ 0
+ 1
+ -1
+ 1
+ 1
+(5 rows)
+
+-- square root
SELECT sqrt(float8 '64') AS eight;
eight
-------
8
(1 row)
--- square root
SELECT |/ float8 '64' AS eight;
eight
-------