I am trying to use Explain Analyze to trace a slow SQL statement called from JDBC. The SQL statement with the parameters taked 11 seconds. When I run a explain analyze from psql, it takes < 50 ms with a reasonable explain plan. However when I try to run an explain analyze from JDBC with the parameters, I get error :
ERROR: no value found for parameter 1

Here is sample code which causes this exception ...
pst=prodconn.prepareStatement("explain analyze select count(*) from jam_heaprel r where heap_id = ? and parentaddr = ?");

java.sql.SQLException: ERROR: no value found for parameter 1
at org.postgresql.core.v3.QueryExecutorImpl.receiveErrorResponse(QueryExecutorImpl.java:1471) at org.postgresql.core.v3.QueryExecutorImpl.processResults(QueryExecutorImpl.java:1256) at org.postgresql.core.v3.QueryExecutorImpl.execute(QueryExecutorImpl.java:175) at org.postgresql.jdbc2.AbstractJdbc2Statement.execute(AbstractJdbc2Statement.java:389) at org.postgresql.jdbc2.AbstractJdbc2Statement.executeWithFlags(AbstractJdbc2Statement.java:330) at org.postgresql.jdbc2.AbstractJdbc2Statement.executeQuery(AbstractJdbc2Statement.java:240)
        at jsp._testexplain_2ejsp._jspService(_testexplain_2ejsp.java:82)
        at org.gjt.jsp.HttpJspPageImpl.service(HttpJspPageImpl.java:75)



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