Fix failure to follow the directions when "init" fork was added.

MasaoFujii · MasaoFujii · commit 4b1812b81320 · 2014-08-11T23:20:21.000+09:00
Specifically this commit updates forkname_to_number() so that the HINT message includes "init" fork, and also adds the description of "init" fork into pg_relation_size() document. This is a part of the commit 2d00190 which has fixed the same oversight in master and 9.4. Back-patch to 9.1 where "init" fork was added.
diff --git a/doc/src/sgml/func.sgml b/doc/src/sgml/func.sgml
@@ -14400,7 +14400,7 @@ postgres=# SELECT * FROM pg_xlogfile_name_offset(pg_stop_backup());
        <entry><type>bigint</type></entry>
        <entry>
         Disk space used by the specified fork (<literal>'main'</literal>,
-        <literal>'fsm'</literal> or <literal>'vm'</>)
+        <literal>'fsm'</literal>, <literal>'vm'</>, or <literal>'init'</>)
         of the specified table or index
        </entry>
       </row>
@@ -14521,6 +14521,12 @@ postgres=# SELECT * FROM pg_xlogfile_name_offset(pg_stop_backup());
        (see <xref linkend="storage-vm">) associated with the relation.
       </para>
      </listitem>
+     <listitem>
+      <para>
+       <literal>'init'</literal> returns the size of the initialization fork,
+       if any, (see <xref linkend="storage-init">) associated with the relation.
+      </para>
+     </listitem>
     </itemizedlist>
    </para>
 
diff --git a/src/backend/catalog/catalog.c b/src/backend/catalog/catalog.c
@@ -74,7 +74,8 @@ forkname_to_number(char *forkName)
 	ereport(ERROR,
 			(errcode(ERRCODE_INVALID_PARAMETER_VALUE),
 			 errmsg("invalid fork name"),
-			 errhint("Valid fork names are \"main\", \"fsm\", and \"vm\".")));
+			 errhint("Valid fork names are \"main\", \"fsm\", "
+					 "\"vm\", and \"init\".")));
 	return InvalidForkNumber;	/* keep compiler quiet */
 }
 

Original file line number	Diff line number	Diff line change
`@@ -74,7 +74,8 @@ forkname_to_number(char *forkName)`
`74`	`74`	`ereport(ERROR,`
`75`	`75`	`(errcode(ERRCODE_INVALID_PARAMETER_VALUE),`
`76`	`76`	`errmsg("invalid fork name"),`
`77`		`- errhint("Valid fork names are \"main\", \"fsm\", and \"vm\".")));`
	`77`	`+ errhint("Valid fork names are \"main\", \"fsm\", "`
	`78`	`+ "\"vm\", and \"init\".")));`
`78`	`79`	`return InvalidForkNumber; /* keep compiler quiet */`
`79`	`80`	`}`
`80`	`81`