=== modified file 'dhis-2/dhis-services/dhis-service-analytics/src/main/java/org/hisp/dhis/analytics/table/AbstractJdbcTableManager.java'
--- dhis-2/dhis-services/dhis-service-analytics/src/main/java/org/hisp/dhis/analytics/table/AbstractJdbcTableManager.java	2013-11-27 19:02:17 +0000
+++ dhis-2/dhis-services/dhis-service-analytics/src/main/java/org/hisp/dhis/analytics/table/AbstractJdbcTableManager.java	2013-12-10 14:17:42 +0000
@@ -119,16 +119,19 @@
     public List<AnalyticsTable> getTables( Date earliest, Date latest )
     {
         log.info( "Get tables using earliest: " + earliest + ", latest: " + latest );
-        
-        String baseName = getTableName();
-        
-        List<Period> periods = PartitionUtils.getPeriods( earliest, latest );
 
         List<AnalyticsTable> tables = new ArrayList<AnalyticsTable>();
         
-        for ( Period period : periods )
-        {
-            tables.add( new AnalyticsTable( baseName, getDimensionColumns( null ), period ) );
+        if ( earliest != null && latest != null )
+        {        
+            String baseName = getTableName();
+            
+            List<Period> periods = PartitionUtils.getPeriods( earliest, latest );
+    
+            for ( Period period : periods )
+            {
+                tables.add( new AnalyticsTable( baseName, getDimensionColumns( null ), period ) );
+            }
         }
         
         return tables;

=== modified file 'dhis-2/dhis-services/dhis-service-analytics/src/main/java/org/hisp/dhis/analytics/table/JdbcAnalyticsTableManager.java'
--- dhis-2/dhis-services/dhis-service-analytics/src/main/java/org/hisp/dhis/analytics/table/JdbcAnalyticsTableManager.java	2013-11-27 19:02:17 +0000
+++ dhis-2/dhis-services/dhis-service-analytics/src/main/java/org/hisp/dhis/analytics/table/JdbcAnalyticsTableManager.java	2013-12-10 14:17:42 +0000
@@ -245,7 +245,8 @@
     public Date getEarliestData()
     {
         final String sql = "select min(pe.startdate) from datavalue dv " +
-            "join period pe on dv.periodid=pe.periodid";
+            "join period pe on dv.periodid=pe.periodid " +
+            "where pe.startdate is not null";
         
         return jdbcTemplate.queryForObject( sql, Date.class );
     }
@@ -253,7 +254,8 @@
     public Date getLatestData()
     {
         final String sql = "select max(pe.enddate) from datavalue dv " +
-            "join period pe on dv.periodid=pe.periodid";
+            "join period pe on dv.periodid=pe.periodid " + 
+            "where pe.enddate is not null ";
         
         return jdbcTemplate.queryForObject( sql, Date.class );
     }

=== modified file 'dhis-2/dhis-services/dhis-service-analytics/src/main/java/org/hisp/dhis/analytics/table/JdbcCompletenessTableManager.java'
--- dhis-2/dhis-services/dhis-service-analytics/src/main/java/org/hisp/dhis/analytics/table/JdbcCompletenessTableManager.java	2013-11-27 19:02:17 +0000
+++ dhis-2/dhis-services/dhis-service-analytics/src/main/java/org/hisp/dhis/analytics/table/JdbcCompletenessTableManager.java	2013-12-10 14:17:42 +0000
@@ -177,7 +177,8 @@
     public Date getEarliestData()
     {
         final String sql = "select min(pe.startdate) from completedatasetregistration cdr " +
-            "join period pe on cdr.periodid=pe.periodid";
+            "join period pe on cdr.periodid=pe.periodid " +
+            "where pe.startdate is not null";
         
         return jdbcTemplate.queryForObject( sql, Date.class );
     }
@@ -185,7 +186,8 @@
     public Date getLatestData()
     {
         final String sql = "select max(pe.enddate) from completedatasetregistration cdr " +
-            "join period pe on cdr.periodid=pe.periodid";
+            "join period pe on cdr.periodid=pe.periodid " +
+            "where pe.enddate is not null";
         
         return jdbcTemplate.queryForObject( sql, Date.class );
     }

=== modified file 'dhis-2/dhis-services/dhis-service-analytics/src/main/java/org/hisp/dhis/analytics/table/JdbcEventAnalyticsTableManager.java'
--- dhis-2/dhis-services/dhis-service-analytics/src/main/java/org/hisp/dhis/analytics/table/JdbcEventAnalyticsTableManager.java	2013-12-05 10:41:52 +0000
+++ dhis-2/dhis-services/dhis-service-analytics/src/main/java/org/hisp/dhis/analytics/table/JdbcEventAnalyticsTableManager.java	2013-12-10 14:17:42 +0000
@@ -258,14 +258,16 @@
     
     public Date getEarliestData()
     {
-        final String sql = "select min(psi.executiondate) from programstageinstance psi;";
+        final String sql = "select min(psi.executiondate) from programstageinstance psi " +
+            "where psi.executiondate is not null";
         
         return jdbcTemplate.queryForObject( sql, Date.class );
     }
 
     public Date getLatestData()
     {
-        final String sql = "select max(psi.executiondate) from programstageinstance psi;";
+        final String sql = "select max(psi.executiondate) from programstageinstance psi " +
+            "where psi.executiondate is not null";
         
         return jdbcTemplate.queryForObject( sql, Date.class );
     }