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><H1
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><A
NAME="PROTOCOL-ERROR-FIELDS"
>48.6. Error and Notice Message Fields</A
></H1
><P
>This section describes the fields that can appear in ErrorResponse and
NoticeResponse messages. Each field type has a single-byte identification
token. Note that any given field type should appear at most once per
message.</P
><P
></P
><DIV
CLASS="VARIABLELIST"
><DL
><DT
><TT
CLASS="LITERAL"
>S</TT
></DT
><DD
><P
> Severity: the field contents are
<TT
CLASS="LITERAL"
>ERROR</TT
>, <TT
CLASS="LITERAL"
>FATAL</TT
>, or
<TT
CLASS="LITERAL"
>PANIC</TT
> (in an error message), or
<TT
CLASS="LITERAL"
>WARNING</TT
>, <TT
CLASS="LITERAL"
>NOTICE</TT
>, <TT
CLASS="LITERAL"
>DEBUG</TT
>,
<TT
CLASS="LITERAL"
>INFO</TT
>, or <TT
CLASS="LITERAL"
>LOG</TT
> (in a notice message),
or a localized translation of one of these. Always present.</P
></DD
><DT
><TT
CLASS="LITERAL"
>C</TT
></DT
><DD
><P
> Code: the SQLSTATE code for the error (see <A
HREF="errcodes-appendix.html"
>Appendix A</A
>). Not localizable. Always present.</P
></DD
><DT
><TT
CLASS="LITERAL"
>M</TT
></DT
><DD
><P
> Message: the primary human-readable error message.
This should be accurate but terse (typically one line).
Always present.</P
></DD
><DT
><TT
CLASS="LITERAL"
>D</TT
></DT
><DD
><P
> Detail: an optional secondary error message carrying more
detail about the problem. Might run to multiple lines.</P
></DD
><DT
><TT
CLASS="LITERAL"
>H</TT
></DT
><DD
><P
> Hint: an optional suggestion what to do about the problem.
This is intended to differ from Detail in that it offers advice
(potentially inappropriate) rather than hard facts.
Might run to multiple lines.</P
></DD
><DT
><TT
CLASS="LITERAL"
>P</TT
></DT
><DD
><P
> Position: the field value is a decimal ASCII integer, indicating
an error cursor position as an index into the original query string.
The first character has index 1, and positions are measured in
characters not bytes.</P
></DD
><DT
><TT
CLASS="LITERAL"
>p</TT
></DT
><DD
><P
> Internal position: this is defined the same as the <TT
CLASS="LITERAL"
>P</TT
>
field, but it is used when the cursor position refers to an internally
generated command rather than the one submitted by the client.
The <TT
CLASS="LITERAL"
>q</TT
> field will always appear when this field appears.</P
></DD
><DT
><TT
CLASS="LITERAL"
>q</TT
></DT
><DD
><P
> Internal query: the text of a failed internally-generated command.
This could be, for example, a SQL query issued by a PL/pgSQL function.</P
></DD
><DT
><TT
CLASS="LITERAL"
>W</TT
></DT
><DD
><P
> Where: an indication of the context in which the error occurred.
Presently this includes a call stack traceback of active
procedural language functions and internally-generated queries.
The trace is one entry per line, most recent first.</P
></DD
><DT
><TT
CLASS="LITERAL"
>s</TT
></DT
><DD
><P
> Schema name: if the error was associated with a specific database
object, the name of the schema containing that object, if any.</P
></DD
><DT
><TT
CLASS="LITERAL"
>t</TT
></DT
><DD
><P
> Table name: if the error was associated with a specific table, the
name of the table. (Refer to the schema name field for the name of
the table's schema.)</P
></DD
><DT
><TT
CLASS="LITERAL"
>c</TT
></DT
><DD
><P
> Column name: if the error was associated with a specific table column,
the name of the column. (Refer to the schema and table name fields to
identify the table.)</P
></DD
><DT
><TT
CLASS="LITERAL"
>d</TT
></DT
><DD
><P
> Data type name: if the error was associated with a specific data type,
the name of the data type. (Refer to the schema name field for the
name of the data type's schema.)</P
></DD
><DT
><TT
CLASS="LITERAL"
>n</TT
></DT
><DD
><P
> Constraint name: if the error was associated with a specific
constraint, the name of the constraint. Refer to fields listed above
for the associated table or domain. (For this purpose, indexes are
treated as constraints, even if they weren't created with constraint
syntax.)</P
></DD
><DT
><TT
CLASS="LITERAL"
>F</TT
></DT
><DD
><P
> File: the file name of the source-code location where the error
was reported.</P
></DD
><DT
><TT
CLASS="LITERAL"
>L</TT
></DT
><DD
><P
> Line: the line number of the source-code location where the error
was reported.</P
></DD
><DT
><TT
CLASS="LITERAL"
>R</TT
></DT
><DD
><P
> Routine: the name of the source-code routine reporting the error.</P
></DD
></DL
></DIV
><DIV
CLASS="NOTE"
><BLOCKQUOTE
CLASS="NOTE"
><P
><B
>Note: </B
> The fields for schema name, table name, column name, data type name, and
constraint name are supplied only for a limited number of error types;
see <A
HREF="errcodes-appendix.html"
>Appendix A</A
>. Frontends should not assume that
the presence of any of these fields guarantees the presence of another
field. Core error sources observe the interrelationships noted above, but
user-defined functions may use these fields in other ways. In the same
vein, clients should not assume that these fields denote contemporary
objects in the current database.
</P
></BLOCKQUOTE
></DIV
><P
>The client is responsible for formatting displayed information to meet its
needs; in particular it should break long lines as needed. Newline characters
appearing in the error message fields should be treated as paragraph breaks,
not line breaks.</P
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