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Message Posted: Mon, 06 Jan 2003 @ 16:42:37 GMT

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Subj:   Re: Number overflow occured during computation
From:   Matthew Winter


Multiplying two dec(15,2) fields would generate a dec(18,4) field.

The quick test would be something like:

    CAST(100.00 AS DECIMAL(15,2)) * CAST(100.00 AS DECIMAL(15,2)) AS C1
  , TYPE(C1)

This returns:

C1          Type(C1)
10,000.0000 DECIMAL(18,4)

The rule tends to be to add the two precision values together, with a maximum value of 18, and use this as the target precision value. The two scale values are also added together, to form the target scale value, if the target scale value is greater than 18, then a "2614: Precision loss during expression evaluation" error is generated.

For example DEC(5,2) * DEC(5,2) = DEC(10,4)


Matthew Winter

Technical Architect
TPG IS Design Authority
Teradata Certified Professional

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