The patch increases the maximum supported precision (total number of
digits) for numeric (decimal) fields to 38 digits (current limit on
Oracle and MSSQL).
Additionally, we add our own limit for the whole number part of numeric
fields so they are no longer than integer fields (20 digits). This is to
make it easier to eventually convert from one field type to another.
Note that PHP floats commonly support precision of roughly 15 digits
anyway.
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