Ruby on Rails

I have been getting the following exception lately using the postgresql adapter.  It seems to be related to Transactions, since it mentions BEGIN.  I had a model  named Transaction, which I thought might be causing the problem, so I renamed it to Transact.  But I still get the error.  Something is generating 'EXPLAIN BEGIN' as the entirety of the SQL statement.

The rails statement that is running is a dynamic finder:

if v = Violation.find_by_issuer_id_and_filer_id(issuer.id, filer.id)
    v << filing

 end

Anyone seen this? Any ideas?

/home/ded/.rvm/gems/ruby-1.9.3-p194/gems/activerecord-3.2.8/lib/active_record/connection_adapters/postgresql_adapter.rb:1158:in `async_exec': PG::Error: ERROR:  syntax error at or near "BEGIN" (ActiveRecord::StatementInvalid)
LINE 1: EXPLAIN BEGIN
                ^
: EXPLAIN BEGIN
        from /home/ded/.rvm/gems/ruby-1.9.3-p194/gems/activerecord-3.2.8/lib/active_record/connection_adapters/postgresql_adapter.rb:1158:in `exec_no_cache'
        from /home/ded/.rvm/gems/ruby-1.9.3-p194/gems/activerecord-3.2.8/lib/active_record/connection_adapters/postgresql_adapter.rb:664:in `block in exec_query'
        from /home/ded/.rvm/gems/ruby-1.9.3-p194/gems/activerecord-3.2.8/lib/active_record/connection_adapters/abstract_adapter.rb:280:in `block in log'
        from /home/ded/.rvm/gems/ruby-1.9.3-p194/gems/activesupport-3.2.8/lib/active_support/notifications/instrumenter.rb:20:in `instrument'
        from /home/ded/.rvm/gems/ruby-1.9.3-p194/gems/activerecord-3.2.8/lib/active_record/connection_adapters/abstract_adapter.rb:275:in `log'
        from /home/ded/.rvm/gems/ruby-1.9.3-p194/gems/activerecord-3.2.8/lib/active_record/connection_adapters/postgresql_adapter.rb:663:in `exec_query'
        from /home/ded/.rvm/gems/ruby-1.9.3-p194/gems/activerecord-3.2.8/lib/active_record/connection_adapters/postgresql_adapter.rb:538:in `explain'
        from /home/ded/.rvm/gems/ruby-1.9.3-p194/gems/activerecord-3.2.8/lib/active_record/explain.rb:65:in `block (2 levels) in exec_explain'
        from /home/ded/.rvm/gems/ruby-1.9.3-p194/gems/activerecord-3.2.8/lib/active_record/explain.rb:59:in `tap'
        from /home/ded/.rvm/gems/ruby-1.9.3-p194/gems/activerecord-3.2.8/lib/active_record/explain.rb:59:in `block in exec_explain'
        from /home/ded/.rvm/gems/ruby-1.9.3-p194/gems/activerecord-3.2.8/lib/active_record/explain.rb:58:in `map'
        from /home/ded/.rvm/gems/ruby-1.9.3-p194/gems/activerecord-3.2.8/lib/active_record/explain.rb:58:in `exec_explain'
        from /home/ded/.rvm/gems/ruby-1.9.3-p194/gems/activerecord-3.2.8/lib/active_record/explain.rb:34:in `logging_query_plan'
        from /home/ded/.rvm/gems/ruby-1.9.3-p194/gems/activerecord-3.2.8/lib/active_record/relation.rb:159:in `to_a'
        from /home/ded/.rvm/gems/ruby-1.9.3-p194/gems/activerecord-3.2.8/lib/active_record/relation/finder_methods.rb:378:in `find_first'
        from /home/ded/.rvm/gems/ruby-1.9.3-p194/gems/activerecord-3.2.8/lib/active_record/relation/finder_methods.rb:122:in `first'
        from /home/ded/.rvm/gems/ruby-1.9.3-p194/gems/activerecord-3.2.8/lib/active_record/relation/finder_methods.rb:264:in `find_by_attributes'
        from /home/ded/.rvm/gems/ruby-1.9.3-p194/gems/activerecord-3.2.8/lib/active_record/dynamic_matchers.rb:45:in `method_missing'
        from lib/script/find_spvs.rb:29:in `block (2 levels) in <main>'
        from /home/ded/.rvm/gems/ruby-1.9.3-p194/gems/activerecord-3.2.8/lib/active_record/associations/collection_proxy.rb:89:in `each'
        from /home/ded/.rvm/gems/ruby-1.9.3-p194/gems/activerecord-3.2.8/lib/active_record/associations/collection_proxy.rb:89:in `method_missing'
        from lib/script/find_spvs.rb:25:in `block in <main>'
        from lib/script/find_spvs.rb:22:in `each'
        from lib/script/find_spvs.rb:22:in `<main>'

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