diff --git a/lib/logstash/outputs/jdbc.rb b/lib/logstash/outputs/jdbc.rb
index 472e5da..7dd2a56 100644
--- a/lib/logstash/outputs/jdbc.rb
+++ b/lib/logstash/outputs/jdbc.rb
@@ -246,14 +246,15 @@ class LogStash::Outputs::Jdbc < LogStash::Outputs::Base
 
   def add_statement_event_params(statement, event)
     @statement[1..-1].each_with_index do |i, idx|
-      value = event.get(i)
-
-      value = if value.nil? and i.to_s =~ /%{/
-                event.sprintf(i)
-              else
-                value
-              end
-
+      if i.is_a? String 
+        value = event.get(i)
+        if value.nil? and i =~ /%\{/
+          value = event.sprintf(i)
+        end
+      else
+        value = i
+      end
+      
       case value
       when Time
         # See LogStash::Timestamp, below, for the why behind strftime.
diff --git a/spec/jdbc_spec_helper.rb b/spec/jdbc_spec_helper.rb
index 32da9e4..04e8d98 100644
--- a/spec/jdbc_spec_helper.rb
+++ b/spec/jdbc_spec_helper.rb
@@ -31,7 +31,11 @@ RSpec.shared_context 'when outputting messages' do
   end
 
   let(:jdbc_create_table) do
-    "CREATE table #{jdbc_test_table} (created_at datetime not null, message varchar(512) not null)"
+    "CREATE table #{jdbc_test_table} (created_at datetime not null, message varchar(512) not null, message_sprintf varchar(512) not null, static_int int not null, static_bit bit not null)"
+  end
+
+  let(:jdbc_statement) do
+    ["insert into #{jdbc_test_table} (created_at, message, message_sprintf, static_int, static_bit) values(?, ?, ?, ?, ?)", '@timestamp', 'message', 'sprintf-%{message}', 1, true]
   end
 
   let(:systemd_database_service) do
diff --git a/spec/outputs/jdbc_derby_spec.rb b/spec/outputs/jdbc_derby_spec.rb
index 039b5ab..b06980b 100644
--- a/spec/outputs/jdbc_derby_spec.rb
+++ b/spec/outputs/jdbc_derby_spec.rb
@@ -10,7 +10,7 @@ describe 'logstash-output-jdbc: derby', if: ENV['JDBC_DERBY_JAR'] do
   end
 
   let(:jdbc_create_table) do
-    "CREATE table #{jdbc_test_table} (created_at timestamp not null, message varchar(512) not null)"
+    "CREATE table #{jdbc_test_table} (created_at timestamp not null, message varchar(512) not null, message_sprintf varchar(512) not null, static_int int not null, static_bit boolean not null)"
   end
  
   let(:jdbc_settings) do
@@ -18,7 +18,7 @@ describe 'logstash-output-jdbc: derby', if: ENV['JDBC_DERBY_JAR'] do
       'driver_class' => 'org.apache.derby.jdbc.EmbeddedDriver',
       'connection_string' => 'jdbc:derby:memory:testdb;create=true',
       'driver_jar_path' => ENV[jdbc_jar_env],
-      'statement' => ['insert into logstash_output_jdbc_test (created_at, message) values(?, ?)', '@timestamp', 'message'],
+      'statement' => jdbc_statement,
       'max_flush_exceptions' => 1
     }
   end
diff --git a/spec/outputs/jdbc_mysql_spec.rb b/spec/outputs/jdbc_mysql_spec.rb
index 70aef24..623ba3f 100644
--- a/spec/outputs/jdbc_mysql_spec.rb
+++ b/spec/outputs/jdbc_mysql_spec.rb
@@ -18,7 +18,7 @@ describe 'logstash-output-jdbc: mysql', if: ENV['JDBC_MYSQL_JAR'] do
       'driver_class' => 'com.mysql.jdbc.Driver',
       'connection_string' => 'jdbc:mysql://localhost/logstash_output_jdbc_test?user=root',
       'driver_jar_path' => ENV[jdbc_jar_env],
-      'statement' => ["insert into #{jdbc_test_table} (created_at, message) values(?, ?)", '@timestamp', 'message'],
+      'statement' => jdbc_statement,
       'max_flush_exceptions' => 1
     }
   end
diff --git a/spec/outputs/jdbc_sqlite_spec.rb b/spec/outputs/jdbc_sqlite_spec.rb
index 8b8aa55..81147f4 100644
--- a/spec/outputs/jdbc_sqlite_spec.rb
+++ b/spec/outputs/jdbc_sqlite_spec.rb
@@ -20,7 +20,7 @@ describe 'logstash-output-jdbc: sqlite', if: ENV['JDBC_SQLITE_JAR'] do
       'driver_class' => 'org.sqlite.JDBC',
       'connection_string' => "jdbc:sqlite:#{JDBC_SQLITE_FILE}",
       'driver_jar_path' => ENV[jdbc_jar_env],
-      'statement' => ["insert into #{jdbc_test_table} (created_at, message) values(?, ?)", '@timestamp', 'message'],
+      'statement' => jdbc_statement,
       'max_flush_exceptions' => 1
     }
   end