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Make the v3 protocol ERROR-RESPONSE inherit from BACKEND-ERROR.
- on CL implementations that support Unix sockets, the HOST argument to PG-CONNECT may designate the directory containing the local PostgreSQL unix socket (often "/var/run/postgresql/"). The HOST argument is assumed to designate a local directory rather than a hostname when its first character is #\/. You may need to modify authentication options in the PostgreSQL configuration file pg_hba.conf to allow connections over a unix-domain socket where the databse username is not equal to your ident tokens. This is an incompatible change to previous support for unix-domain sockets with CMUCL (previously a HOST of NIL told pg-dot-lisp to connect to a unix-domain socket whose name was hardwired into the library). This support currently exists for SBCL, CMUCL and OpenMCL.
layout of documentation
Integrate Peter Van Eynde's v3 protocol support: - create PGCON-V2 and PGCON-V3 classes - PG-CONNECT attempts to connect using v3 protocol, and falls back to v2 protocol for older backends; return a PGCON-V2 or PGCON-V3 object - PG-EXEC and FN and PG-DISCONNECT are generic functions that dispatch on the connection type - protocol code split into v2-protocol.lisp and v3-protocol.lisp TBD: cleaning up the notification & error reporting support, and factorizing more code between the two protocol versions. Also split code out into multiple files: - large-object support - metainformation about databases - parsing and type coercion support - utility functions and macros
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