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When commit 3e23b68dac006e8deb0afa327e855258df8de064 introduced single-byte varlena headers, its fmgr.h changes presented PG_GETARG_TEXT_PP() and PG_GETARG_TEXT_P() as equals. Its postgres.h changes presented PG_DETOAST_DATUM_PACKED() and VARDATA_ANY() as the exceptional case. Now, instead, firmly recommend PG_GETARG_TEXT_PP() over PG_GETARG_TEXT_P(); likewise for other ...PP() macros. This shaves cycles and invites consistency of style.
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. 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/.