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Masahiko Sawada 4bea91f21f Support COPY TO for partitioned tables. ... Previously, COPY TO command didn't support directly specifying partitioned tables so users had to use COPY (SELECT ...) TO variant. This commit adds direct COPY TO support for partitioned tables, improving both usability and performance. Performance tests show it's faster than the COPY (SELECT ...) TO variant as it avoids the overheads of query processing and sending results to the COPY TO command. When used with partitioned tables, COPY TO copies the same rows as SELECT * FROM table. Row-level security policies of the partitioned table are applied in the same way as when executing COPY TO on a plain table. Author: jian he <jian.universality@gmail.com> Reviewed-by: vignesh C <vignesh21@gmail.com> Reviewed-by: David Rowley <dgrowleyml@gmail.com> Reviewed-by: Melih Mutlu <m.melihmutlu@gmail.com> Reviewed-by: Kirill Reshke <reshkekirill@gmail.com> Reviewed-by: Atsushi Torikoshi <torikoshia@oss.nttdata.com> Reviewed-by: Álvaro Herrera <alvherre@kurilemu.de> Reviewed-by: Masahiko Sawada <sawada.mshk@gmail.com> Reviewed-by: Chao Li <li.evan.chao@gmail.com> Discussion: https://postgr.es/m/CACJufxEZt%2BG19Ors3bQUq-42-61__C%3Dy5k2wk%3DsHEFRusu7%3DiQ%40mail.gmail.com		2 months ago
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src	Support COPY TO for partitioned tables.	2 months ago
KNOWN_BUGS	…
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