yuzelin commented on code in PR #20401:
URL: https://github.com/apache/flink/pull/20401#discussion_r938492798


##########
flink-connectors/flink-connector-hive/src/main/java/org/apache/flink/table/endpoint/hive/HiveServer2Endpoint.java:
##########
@@ -422,7 +426,76 @@ public TGetCatalogsResp GetCatalogs(TGetCatalogsReq 
tGetCatalogsReq) throws TExc
 
     @Override
     public TGetSchemasResp GetSchemas(TGetSchemasReq tGetSchemasReq) throws 
TException {
-        throw new UnsupportedOperationException(ERROR_MESSAGE);
+        TGetSchemasResp resp = new TGetSchemasResp();
+        try {
+            SessionHandle sessionHandle = 
toSessionHandle(tGetSchemasReq.getSessionHandle());
+            OperationHandle operationHandle =
+                    service.submitOperation(
+                            sessionHandle,
+                            OperationType.LIST_SCHEMAS,
+                            () -> {
+                                Set<String> schemaNames =
+                                        service
+                                                .listDatabases(
+                                                        sessionHandle,
+                                                        
tGetSchemasReq.getCatalogName())
+                                                .stream()
+                                                .filter(
+                                                        name ->
+                                                                name.matches(
+                                                                        
convertNamePattern(
+                                                                               
 tGetSchemasReq
+                                                                               
         .getSchemaName())))
+                                                .collect(Collectors.toSet());
+
+                                return new ResultSet(
+                                        EOS,
+                                        null,
+                                        GET_SCHEMAS_SCHEMA,
+                                        schemaNames.stream()
+                                                .map(
+                                                        name ->
+                                                                
GenericRowData.of(
+                                                                        
StringData.fromString(name),
+                                                                        
StringData.fromString(
+                                                                               
 tGetSchemasReq
+                                                                               
         .getCatalogName())))
+                                                .collect(Collectors.toList()));
+                            });
+
+            // TODO: Remove this
+            while (!service.getOperationInfo(sessionHandle, operationHandle)
+                    .getStatus()
+                    .isTerminalStatus()) {
+                Thread.sleep(1000);
+            }

Review Comment:
   Removed.



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