'\" t
.\"     Title: perror
.\"    Author: [FIXME: author] [see http://docbook.sf.net/el/author]
.\" Generator: DocBook XSL Stylesheets v1.79.1 <http://docbook.sf.net/>
.\"      Date: 03/23/2026
.\"    Manual: MySQL Database System
.\"    Source: MySQL 8.0
.\"  Language: English
.\"
.TH "PERROR" "1" "03/23/2026" "MySQL 8\&.0" "MySQL Database System"
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.SH "NAME"
perror \- display MySQL error message information
.SH "SYNOPSIS"
.HP \w'\fBperror\ [\fR\fB\fIoptions\fR\fR\fB]\ \fR\fB\fIerrorcode\fR\fR\fB\ \&.\&.\&.\fR\ 'u
\fBperror [\fR\fB\fIoptions\fR\fR\fB] \fR\fB\fIerrorcode\fR\fR\fB \&.\&.\&.\fR
.SH "DESCRIPTION"
.PP
\fBperror\fR
displays the error message for MySQL or operating system error codes\&. Invoke
\fBperror\fR
like this:
.sp
.if n \{\
.RS 4
.\}
.nf
perror [\fIoptions\fR] \fIerrorcode\fR \&.\&.\&.
.fi
.if n \{\
.RE
.\}
.PP
\fBperror\fR
attempts to be flexible in understanding its arguments\&. For example, for the
ER_WRONG_VALUE_FOR_VAR
error,
\fBperror\fR
understands any of these arguments:
\fB1231\fR,
001231,
MY\-1231, or
MY\-001231, or
ER_WRONG_VALUE_FOR_VAR\&.
.sp
.if n \{\
.RS 4
.\}
.nf
$> \fBperror 1231\fR
MySQL error code MY\-001231 (ER_WRONG_VALUE_FOR_VAR): Variable \*(Aq%\-\&.64s\*(Aq
can\*(Aqt be set to the value of \*(Aq%\-\&.200s\*(Aq
.fi
.if n \{\
.RE
.\}
.PP
If an error number is in the range where MySQL and operating system errors overlap,
\fBperror\fR
displays both error messages:
.sp
.if n \{\
.RS 4
.\}
.nf
$> \fBperror 1 13\fR
OS error code   1:  Operation not permitted
MySQL error code MY\-000001: Can\*(Aqt create/write to file \*(Aq%s\*(Aq (OS errno %d \- %s)
OS error code  13:  Permission denied
MySQL error code MY\-000013: Can\*(Aqt get stat of \*(Aq%s\*(Aq (OS errno %d \- %s)
.fi
.if n \{\
.RE
.\}
.PP
To obtain the error message for a MySQL Cluster error code, use the
\fBndb_perror\fR
utility\&.
.PP
The meaning of system error messages may be dependent on your operating system\&. A given error code may mean different things on different operating systems\&.
.PP
\fBperror\fR
supports the following options\&.
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-help\fR,
\fB\-\-info\fR,
\fB\-I\fR,
\fB\-?\fR
Display a help message and exit\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-ndb\fR
Print the error message for a MySQL Cluster error code\&.
.sp
This option was removed in MySQL 8\&.0\&.13\&. Use the
\fBndb_perror\fR
utility instead\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-silent\fR,
\fB\-s\fR
Silent mode\&. Print only the error message\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-verbose\fR,
\fB\-v\fR
Verbose mode\&. Print error code and message\&. This is the default behavior\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-version\fR,
\fB\-V\fR
Display version information and exit\&.
.RE
.SH "COPYRIGHT"
.br
.PP
Copyright \(co 1997, 2026, Oracle and/or its affiliates.
.PP
This documentation is free software; you can redistribute it and/or modify it only under the terms of the GNU General Public License as published by the Free Software Foundation; version 2 of the License.
.PP
This documentation is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
.PP
You should have received a copy of the GNU General Public License along with the program; if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA or see http://www.gnu.org/licenses/.
.sp
.SH "SEE ALSO"
For more information, please refer to the MySQL Reference Manual,
which may already be installed locally and which is also available
online at http://dev.mysql.com/doc/.
.SH AUTHOR
Oracle Corporation (http://dev.mysql.com/).
