Re: SQL: how to filter out spaces in fields defined as packed numeric

[CRPence <CRPbottle@xxxxxxxxx>]

On 13 Feb 2013 22:38, CRPence wrote:
> <<SNIP>>
> ≥ mod(length(digits(ifnull(m.OrderQty, dec(0, 1)))), 2) odd_prec
> <<SNIP>>

  The above expression will fail to produce expected results whenever 
the precision=scale for the column OrderQty, thus the given query can 
not be used to validate packed decimal when the column being reviewed 
for bad decimal data has a precision=scale.  Ugh :-(  That lack of 
PRECISION and SCALE scalars definitely seems to be a problem for making 
a solution with just some expressions in a query.

  Maybe that remaining stumbling-block will motivate me to finally 
create the PROCEDURE that would create a VIEW in QTEMP using the column 
LENGTH and NUMERIC_SCALE from SYSCOLUMNS to generate the necessary logic 
to validate all BCD columns of a named physical file [which presumably 
would normally not be a TABLE because a TABLE should be protected from 
the issue of bad decimal data, unlike the DDS PF].  If so, I will 
probably encapsulate the validation [for both PACKED decimal and ZONED 
decimal] in a single UDF invoked effectively like the following, 
returning a zero for false and a one for true:
   VALID_BCD(HEX(column_name), DATA_TYPE, LENGTH, NUMERIC_SCALE)