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



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