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record_out() leaks memory: it fails to free the strings returned by the per-column output functions, and also is careless about detoasted values. This results in a query-lifespan memory leakage when returning composite values to the client, because printtup() runs the output functions in the query-lifespan memory context. Fix it to handle these issues the same way printtup() does. Also fix a similar leakage in record_send(). (At some point we might want to try to run output functions in shorter-lived memory contexts, so that we don't need a zero-leakage policy for them. But that would be a significantly more invasive patch, which doesn't seem like material for back-patching.) In passing, use appendStringInfoCharMacro instead of appendStringInfoChar in the innermost data-copying loop of record_out, to try to shave a few cycles from this function's runtime. Per trouble report from Carlos Henrique Reimer. Back-patch to all supported versions.
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. PostgreSQL has many language interfaces, many of which are listed here: http://www.postgresql.org/download See the file INSTALL for instructions on how to build and install PostgreSQL. That file also lists supported operating systems and hardware platforms and contains information regarding any other software packages that are required to build or run the PostgreSQL system. Changes between all PostgreSQL releases are recorded in the file HISTORY. Copyright and license information can be found in the file COPYRIGHT. A comprehensive documentation set is included in this distribution; it can be read as described in the installation instructions. The latest version of this software may be obtained at http://www.postgresql.org/download/. For more information look at our web site located at http://www.postgresql.org/.