Re: regproc's lack of certainty is dangerous

Tom Lane wrote:
> Another approach is to try to fix pg_statistic to avoid the problem by
> not doing I/O conversions.  For scalar datatypes (those that have
> associated array types) it'd be probably be feasible to store the
> histogram and most-common-value arrays as arrays of the datatype itself,
> not arrays of text; that should be a win for performance as well as
> avoiding risky conversions.  I am not sure what to do about columns that
> have datatypes without matching array types, though (that would include
> array columns and domains, IIRC).  Maybe use array of bytea to hold the
> internal representation of the type?

ISTM that the best (if not the only feasible) approach is using array of 
bytea to hold the internal representation of the type.

Joe