Streaming Replication: sql error on standby

<p><font face="Arial" size="2">Hi, </font><p><font face="Arial" size="2">Sql query "select
pg_last_xlog_receive_location();" does not work during startup of standby database. </font><br /><font face="Arial"
size="2">TestScenario;</font><br/><font face="Arial" size="2">We have a active-standby system with PostgreSQL Streaming
Replicationbeta2. If the active database is up the database is in use (read/write queries will be performed). Then the
standbyPostgreSQL SR will be started (the complete database from the active side is copied to the standby side; nec.
Filesfor starting streaming replication are created). Directly after the possibility to connect to the standby system,
theabove given sql query will be executed. To this timepoint the sql query delivers an error. To a later timepoint (all
walsegments are completly incooperated) the query delivers a valid result. </font><p><font face="Arial"
size="2">Question:</font><br /><font face="Arial" size="2">What is the reason for the error?</font><br /><font
face="Arial"size="2">Exists a command to find out if the standby database is really active to accept/can work with sql
commands?</font><p><font face="Arial" size="2">BR</font><br /><font face="Arial" size="2">Ingo</font><p><i><font
color="#000000"face="Brush Script MT" size="4">Best Regards/mfG</font></i><br /><i><b><font color="#FF0000" face="Brush
ScriptMT" size="6">Ingo Sander</font></b></i><br /><font face="Times New Roman"
size="2">=========================================================</font><br/><font face="Arial Black" size="2">Nokia
SiemensNetworks GmbH &Co. KG</font><br /><span lang="en-us"><font face="Courier New" size="2">NWS EP CP SVSS
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size="2">ingo.sander@nsn.com</font></u></span><p><spanlang="de"><b><font color="#808080" face="Times New Roman"
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