7dc5bbcf22
CopyToJsonOneRow() sent the output of composite_to_json() directly
via CopySendData() without encoding conversion. The text and CSV
paths convert per-attribute via pg_server_to_any() when
need_transcoding is true, but the JSON path skipped this entirely.
This meant COPY ... TO ... WITH (FORMAT json, ENCODING 'LATIN1') on
a UTF-8 server silently produced UTF-8 output, and COPY TO STDOUT
with a non-UTF-8 client_encoding would send unconverted bytes to
the client.
Apply pg_server_to_any() to the whole JSON buffer after
composite_to_json() returns, converting to the requested file
encoding when it differs from the server encoding. Tests cover
both the explicit ENCODING option and the implicit case where
file_encoding is inherited from client_encoding.
Introduced by 7dadd38cda (json format for COPY TO).
Author: Ayush Tiwari <ayushtiwari.slg01@gmail.com>
Reviewed-by: Andrew Dunstan <andrew@dunslane.net>
Discussion: https://postgr.es/m/CAJTYsWX-jsLzxGRAb-dWnEpGYRPbDYHwce8LctVE92LiDfM2Jw@mail.gmail.com
PostgreSQL Database Management System
This directory contains the source code distribution of the PostgreSQL database management system.
PostgreSQL is an advanced object-relational database management system that supports an extended subset of the SQL standard, including transactions, foreign keys, subqueries, triggers, user-defined types and functions. This distribution also contains C language bindings.
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General documentation about this version of PostgreSQL can be found at https://www.postgresql.org/docs/devel/. In particular, information about building PostgreSQL from the source code can be found at https://www.postgresql.org/docs/devel/installation.html.
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