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When using a prepared statement to select data from a PostgreSQL foreign table (postgres_fdw) with the "field = ANY($1)" expression, the operation is not pushed down when an implicit type case is applied, and a generic plan is used. This commit resolves the issue by supporting the push-down of ArrayCoerceExpr, which is used in this case. The support is quite straightforward and similar to other nods, such as RelabelType. Discussion: https://postgr.es/m/4f0cea802476d23c6e799512ffd17aff%40postgrespro.ru Author: Alexander Pyhalov <a.pyhalov@postgrespro.ru> Reviewed-by: Maxim Orlov <orlovmg@gmail.com> Reviewed-by: Alexander Korotkov <aekorotkov@gmail.com>