The keyword is RoundHalfwayMagUp
its a dbscontroll setting and defines how Teradata is handling the rounding.
Default is FALSE
from the manuals:
Purpose
Indicates how rounding should be performed when computing values of DECIMAL type. A
halfway value is exactly halfway between representable decimal values.
Field Group
General
Valid Settings
The rounding behavior is different depending upon the setting of the RoundHalfwayMagUp
field.
Default
FALSE
Changes Take Effect
After the next Teradata Database restart.
IF you set the field to… THEN the Teradata Database system uses the rounding semantics…
TRUE appropriate for many business applications:
The magnitudes of halfway values are rounded up. Halfway values are
rounded away from zero so that positive halfway values are rounded up
and negative halfway values are rounded down (toward negative infinity).
For example, a value of 2.5 is rounded to 3.
FALSE traditional for Teradata Database:
A halfway value is rounded up or down so that the least significant digit is
even. For example, a value of 2.5 is rounded to 2.
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