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commit    5cbe935c9d6046f5600ff2e083b4bae6ee1f4aa2
Author:   Robert Haas <rhaas@postgresql.org>
Date:     Thu Jul 04 15:11:56 2013 +0000
First released in: 9.4.0, 9.3.0

    docs: Clarify flag dependencies for background workers.
    
    BGWORKER_BACKEND_DATABASE_CONNECTION can only be used if
    BGWORKER_SHMEM_ACCESS is also used.
    
    Michael Paquier, with some tweaks by me.


 doc/src/sgml/bgworker.sgml | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/doc/src/sgml/bgworker.sgml b/doc/src/sgml/bgworker.sgml
index 1151161a848..b0dde7564d8 100644
--- a/doc/src/sgml/bgworker.sgml
+++ b/doc/src/sgml/bgworker.sgml
@@ -64,7 +64,10 @@ typedef struct BackgroundWorker
    <literal>BGWORKER_SHMEM_ACCESS</literal> (requesting shared memory access)
    and <literal>BGWORKER_BACKEND_DATABASE_CONNECTION</literal> (requesting the
    ability to establish a database connection, through which it can later run
-   transactions and queries).
+   transactions and queries). A background worker using
+   <literal>BGWORKER_BACKEND_DATABASE_CONNECTION</literal> to connect to
+   a database must also attach shared memory using
+   <literal>BGWORKER_SHMEM_ACCESS</literal>, or worker start-up will fail.
   </para>
 
   <para>


[parent: 0d1795680d57]