.TH "PQgeterror" 3 2011 "libpqtypes" "libpqtypes Manual"
.SH NAME
PQgeterror, PQseterror, PQgetErrorField \- libpqtypes error system management functions
.SH SYNOPSIS
.LP
\fB#include <libpqtypes.h>
.br
.sp
char *PQgeterror(void);
.br
void PQseterror(const char *\fIformat\fP, ...);
.br
char *PQgetErrorField(int \fIfieldcode\fP);
\fP
.SH DESCRIPTION
.LP
The libpqtypes library maintains a per-thread global error message.  The error
message is managed by \fIPQgeterror\fP() and \fiPQseterror\fP().

\fiPQseterror\fP() takes a regular printf compatible \fIformat\fP string for
setting the libpqtypes error message.

\fiPQgetErrorField\fP() gets an error field from the last executed query.
The error field is only set by PQparamExec and PQparamExecPrepared.  When
using libpq functions that return results, like PQexec, continue to use
PQresultErrorField.

To clear the libpqtypes error message, call \fiPQseterror\fP() with a NULL
\fIformat\fP string: PQseterror(NULL);  This will also clear error fields.
.SH RETURN VALUE
.LP
\fIPQgeterror\fP() returns the last error message for the calling thread.  It will
never return NULL.
.LP
\fIPQgetErrorField\fP() returns the error field, referenced by fieldcode, for
the last executed query.  NULL is returned if no value exists.
.SH EXAMPLES
.LP
None.
.SH AUTHOR
.LP
A contribution of eSilo, LLC. for the PostgreSQL Database Management System.
Written by Andrew Chernow and Merlin Moncure.
.SH REPORTING BUGS
.LP
Report bugs to <libpqtypes@esilo.com>.
.SH COPYRIGHT
.LP
Copyright (c) 2011 eSilo, LLC. All rights reserved.
.br
This is free software; see the source for copying conditions.
There is NO warranty; not even for MERCHANTABILITY or  FITNESS
FOR A PARTICULAR PURPOSE.
.SH SEE ALSO
.LP
\fIpqt-specs(3)\fP