<!--
-$Header: /cvsroot/pgsql/doc/src/sgml/ref/lock.sgml,v 1.16 2000/03/23 22:25:35 momjian Exp $
+$Header: /cvsroot/pgsql/doc/src/sgml/ref/lock.sgml,v 1.17 2000/03/23 23:16:47 momjian Exp $
Postgres documentation
-->
<term>Notes</term>
<listitem>
<para>
- If EXCLUSIVE or SHARE are not speicified, EXCLUSIVE is assumed.
+ If EXCLUSIVE or SHARE are not specified, EXCLUSIVE is assumed.
If ROW or ACCESS is not specified, the entire table is locked
for the duration of the transaction.
</para>
<note>
<para>
This lock mode is acquired automatically over tables being queried.
- This lock is released automatically after the statement completes.
+ It is released after the statement completes.
It does not remain for the duration of the transaction.
</para>
</note>
<para>
This is the least restrictive lock mode. It conflicts only with
- ACCESS EXCLUSIVE mode. It is intended to protect a table being
+ ACCESS EXCLUSIVE mode. It is used to protect a table being
modified by concurrent <command>ALTER TABLE</command>,
<command>DROP TABLE</command> and <command>VACUUM</command>
commands.
<para>
Automatically acquired by <command>SELECT...FOR UPDATE</command>.
While it is a shared lock, there is the intention to later upgrade
- this to an EXCLUSIVE lock.
+ this to a ROW EXCLUSIVE lock.
</para>
</note>
*
*
* IDENTIFICATION
- * $Header: /cvsroot/pgsql/src/backend/tcop/postgres.c,v 1.147 2000/03/01 02:39:46 ishii Exp $
+ * $Header: /cvsroot/pgsql/src/backend/tcop/postgres.c,v 1.148 2000/03/23 23:16:48 momjian Exp $
*
* NOTES
* this is the "main" module of the postgres backend and
CommandDest whereToSendOutput = Debug;
/* Define status buffer needed by PS_SET_STATUS */
+#ifdef PS_DEFINE_BUFFER
PS_DEFINE_BUFFER;
+#endif
extern void BaseInit(void);
extern void StartupXLOG(void);
if (!IsUnderPostmaster)
{
puts("\nPOSTGRES backend interactive interface ");
- puts("$Revision: 1.147 $ $Date: 2000/03/01 02:39:46 $\n");
+ puts("$Revision: 1.148 $ $Date: 2000/03/23 23:16:48 $\n");
}
/*
extern char Ps_status_buffer[];
-#define PS_DEFINE_BUFFER
+#undef PS_DEFINE_BUFFER
#define PS_INIT_STATUS(argc, argv, execname, username, hostname, dbname) \
{ \
#endif
#ifdef NO_PS_STATUS
-#define PS_DEFINE_BUFFER
+#undef PS_DEFINE_BUFFER
#define PS_INIT_STATUS(argc, argv, execname, username, hostname, dbname)
#define PS_CLEAR_STATUS()
#define PS_SET_STATUS(status) { if ((status)); }