deniskuzZ commented on code in PR #4959:
URL: https://github.com/apache/hive/pull/4959#discussion_r1504065586


##########
standalone-metastore/metastore-server/src/main/java/org/apache/hadoop/hive/metastore/MetaStoreDirectSql.java:
##########
@@ -1424,30 +1422,36 @@ public void visit(LeafNode node) throws MetaException {
         return;
       }
 
+      String nodeValue0 = "?";
       // if Filter.g does date parsing for quoted strings, we'd need to verify 
there's no
       // type mismatch when string col is filtered by a string that looks like 
date.
-      if (colType == FilterType.Date && valType == FilterType.String) {
-        // Filter.g cannot parse a quoted date; try to parse date here too.
+      if (colType == FilterType.Date) {
         try {
-          nodeValue = MetaStoreUtils.convertStringToDate((String)nodeValue);
+          // check the nodeValue is a valid date
+          nodeValue = MetaStoreUtils.convertDateToString(
+              MetaStoreUtils.convertStringToDate((String) nodeValue));
           valType = FilterType.Date;
-        } catch (Exception pe) { // do nothing, handled below - types will 
mismatch
+          if (dbType.isPOSTGRES() || dbType.isORACLE()) {
+            nodeValue0 = "date '" + nodeValue + "'";
+            nodeValue = null;
+          }
+        } catch (Exception e) {  // do nothing, handled below - types will 
mismatch
+        }
+      } else if (colType == FilterType.Timestamp) {
+        if (dbType.isDERBY() || dbType.isMYSQL()) {
+          filterBuffer.setError("Filter pushdown on timestamp not supported 
for " + dbType.dbType.name());

Review Comment:
   should we move this to constants?



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