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Use a lexer and grammar for parsing walsender commands

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Makes it easier to parse mainly the BASE_BACKUP command
with it's options, and avoids having to manually deal
with quoted identifiers in the label (previously broken),
and makes it easier to add new commands and options in
the future.

In passing, refactor the case statement in the walsender
to put each command in it's own function.
This commit is contained in:
Magnus Hagander
2011-01-14 16:30:33 +01:00
parent 688423d004
commit fcd810c69a
12 changed files with 603 additions and 128 deletions
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21
doc/src/sgml/protocol.sgml
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@ -1460,15 +1460,26 @@ The commands accepted in walsender mode are:
</varlistentry>
<varlistentry>
<term>BASE_BACKUP <replaceable>options</><literal>;</><replaceable>label</></term>
<term>BASE_BACKUP [<literal>LABEL</literal> <replaceable>'label'</replaceable>] [<literal>PROGRESS</literal>]</term>
<listitem>
<para>
Instructs the server to start streaming a base backup.
The system will automatically be put in backup mode with the label
specified in <replaceable>label</> before the backup is started, and
taken out of it when the backup is complete. The following options
are accepted:
The system will automatically be put in backup mode before the backup
is started, and taken out of it when the backup is complete. The
following options are accepted:
<variablelist>
<varlistentry>
<term><literal>LABEL</literal> <replaceable>'label'</replaceable></term>
<listitem>
<para>
Sets the label of the backup. If none is specified, a backup label
of <literal>base backup</literal> will be used. The quoting rules
for the label are the same as a standard SQL string with
<xref linkend="guc-standard-conforming-strings"> turned on.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><literal>PROGRESS</></term>
<listitem>