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- Move most of the I/O in both libpq and the backend to a set

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of common routines in pqcomprim.c (pq communication primitives).
    Not all adapted to it yet, but it's a start.

  - Rewritten some of those routines, to write/read bigger chunks of
    data, precomputing stuff in buffers instead of sending out byte
    by byte.

  - As a consequence, I need to know the endianness of the machine.
    Currently I rely on getting it from machine/endian.h, but this
    may not be available everywhere? (Who the hell thought it was
    a good idea to pass integers to the backend the other way around
    than the normal network byte order? *argl*)

  - Libpq looks in the environment for magic variables, and upon
    establishing a connection to the backend, sends it queries
    of the form "SET var_name TO 'var_value'". This needs a change
    in the backend parser (Mr. Parser, are you there? :)

  - Currently it looks for two Env-Vars, namely PG_DATEFORMAT
    and PG_FLOATFORMAT. What else makes sense? PG_TIMEFORMAT?
    PG_TIMEZONE?

From: "Martin J. Laubach" <mjl@wwx.vip.at>
This commit is contained in:
Marc G. Fournier
1997-03-18 20:15:39 +00:00
parent d146305065
commit 812a6c2b54
6 changed files with 273 additions and 66 deletions
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30
src/interfaces/libpq/fe-connect.c
View File

@ -7,7 +7,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/interfaces/libpq/fe-connect.c,v 1.24 1997/03/12 21:23:09 scrappy Exp $
* $Header: /cvsroot/pgsql/src/interfaces/libpq/fe-connect.c,v 1.25 1997/03/18 20:15:39 scrappy Exp $
*
*-------------------------------------------------------------------------
*/
@ -100,6 +100,16 @@ static PQconninfoOption PQconninfoOptions[] = {
NULL, NULL, 0 }
};
struct EnvironmentOptions
{
const char *envName, *pgName;
} EnvironmentOptions[] =
{
{ "PG_DATEFORMAT", "pg_dateformat" },
{ "PG_FLOATFORMAT", "pg_floatformat" },
{ NULL }
};
/* ----------------
* PQconnectdb
*
@ -514,6 +524,24 @@ connectDB(PGconn *conn)
conn->port = port;
{
struct EnvironmentOptions *eo;
char setQuery[80]; /* mjl: size okay? XXX */
for(eo = EnvironmentOptions; eo->envName; eo++)
{
const char *val;
if(val = getenv(eo->envName))
{
PGresult *res;
sprintf(setQuery, "SET %s TO \".60%s\"", eo->pgName, val);
res = PQexec(conn, setQuery);
PQclear(res); /* Don't care? */
}
}
}
return CONNECTION_OK;
connect_errReturn: