COPY's test for read-only transaction was backward; it prohibited COP…

…Y TO

where it should prohibit COPY FROM.  Found by Alon Goldshuv.

doc/src/sgml/release.sgml

@@ -1,5 +1,5 @@
 <!--
-$Header: /cvsroot/pgsql/doc/src/sgml/release.sgml,v 1.235.2.32 2005/10/03 16:05:09 tgl Exp $
+$Header: /cvsroot/pgsql/doc/src/sgml/release.sgml,v 1.235.2.33 2005/10/03 23:43:42 tgl Exp $
 -->
 
 <appendix id="release">
@@ -41,6 +41,11 @@ length when using a multiple-byte character set (Yoshiyuki Asaba)</para>
 <para>In prior releases, the padding of <type>CHAR()</> was incorrect
 because it only padded to the specified number of bytes without
 considering how many characters were stored.</para></listitem>
+<listitem><para>Fix the sense of the test for read-only transaction
+in <command>COPY</></para>
+<para>The code formerly prohibited <command>COPY TO</>, where it should
+prohibit <command>COPY FROM</>.
+</para></listitem>
 <listitem><para>Fix planning problem with outer-join ON clauses that reference
 only the inner-side relation</para></listitem>
 <listitem><para>Further fixes for <literal>x FULL JOIN y ON true</> corner

src/backend/commands/copy.c

@@ -8,7 +8,7 @@
  *
  *
  * IDENTIFICATION
- *	  $Header: /cvsroot/pgsql/src/backend/commands/copy.c,v 1.213.2.1 2004/01/18 02:15:57 tgl Exp $
+ *	  $Header: /cvsroot/pgsql/src/backend/commands/copy.c,v 1.213.2.2 2005/10/03 23:43:45 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -752,7 +752,8 @@ DoCopy(const CopyStmt *stmt)
 	rel = heap_openrv(relation, (is_from ? RowExclusiveLock : AccessShareLock));
 
 	/* check read-only transaction */
-	if (XactReadOnly && !is_from && !isTempNamespace(RelationGetNamespace(rel)))
+	if (XactReadOnly && is_from &&
+		!isTempNamespace(RelationGetNamespace(rel)))
 		ereport(ERROR,
 				(errcode(ERRCODE_READ_ONLY_SQL_TRANSACTION),
 				 errmsg("transaction is read-only")));