Verify nonexist measurement in an exist device if it exists.

integration-test/src/test/java/org/apache/iotdb/db/it/schema/IoTDBAlterTimeSeriesTypeIT.java

@@ -445,6 +445,24 @@ public void testAlterNonExist() throws IoTDBConnectionException, StatementExecut
       } catch (StatementExecutionException e) {
         assertEquals("508: Path [" + database + ".non_exist.s1] does not exist", e.getMessage());
       }
+
+      // Make the "non_exist" device exist, test the  "nonexist" measurement if it can be altered
+      // data type.
+      try {
+        session.executeNonQueryStatement(
+            "CREATE TIMESERIES " + database + ".d1.int32 WITH DATATYPE=INT32");
+        session.executeNonQueryStatement(
+            "ALTER TIMESERIES " + database + ".d1.nonexistent SET DATA TYPE STRING");
+        fail("Should throw exception");
+      } catch (StatementExecutionException e) {
+        assertEquals(
+            "507: Alter timeseries "
+                + database
+                + ".d1.nonexistent data type to STRING in schema regions failed. Failures: {DataNodeId: 1=[TSStatus(code:508, message:Path ["
+                + database
+                + ".d1.nonexistent] does not exist)]}",
+            e.getMessage());
+      }
     }
   }
 

iotdb-core/confignode/src/main/java/org/apache/iotdb/confignode/procedure/impl/schema/AlterTimeSeriesDataTypeProcedure.java

@@ -179,22 +179,13 @@ private boolean alterTimeSeriesDataType(final ConfigNodeProcedureEnv env) {
             env.getConfigManager().getRelatedSchemaRegionGroup(patternTree, false),
             false,
             CnToDnAsyncRequestType.ALTER_TIMESERIES_DATATYPE,
-            ((dataNodeLocation, consensusGroupIdList) -> {
-              ByteBuffer measurementPathBuffer = null;
-              try (ByteArrayOutputStream baos = new ByteArrayOutputStream()) {
-                measurementPath.serialize(baos);
-                measurementPathBuffer = ByteBuffer.wrap(baos.toByteArray());
-              } catch (IOException ignored) {
-                // ByteArrayOutputStream won't throw IOException
-              }
-
-              return new TAlterTimeSeriesReq(
-                  consensusGroupIdList,
-                  queryId,
-                  measurementPathBuffer,
-                  operationType,
-                  ByteBuffer.wrap(stream.toByteArray()));
-            })) {
+            ((dataNodeLocation, consensusGroupIdList) ->
+                new TAlterTimeSeriesReq(
+                    consensusGroupIdList,
+                    queryId,
+                    measurementPathBytes,
+                    operationType,
+                    prepareDataTypeBytesData()))) {
 
           @Override
           protected List<TConsensusGroupId> processResponseOfOneDataNode(
@@ -210,13 +201,11 @@ protected List<TConsensusGroupId> processResponseOfOneDataNode(
             if (response.getCode() == TSStatusCode.MULTIPLE_ERROR.getStatusCode()) {
               final List<TSStatus> subStatus = response.getSubStatus();
               for (int i = 0; i < subStatus.size(); i++) {
-                if (subStatus.get(i).getCode() != TSStatusCode.SUCCESS_STATUS.getStatusCode()
-                    && !(subStatus.get(i).getCode()
-                        == TSStatusCode.PATH_NOT_EXIST.getStatusCode())) {
+                if (subStatus.get(i).getCode() != TSStatusCode.SUCCESS_STATUS.getStatusCode()) {
                   failedRegionList.add(consensusGroupIdList.get(i));
                 }
               }
-            } else if (!(response.getCode() == TSStatusCode.PATH_NOT_EXIST.getStatusCode())) {
+            } else {
               failedRegionList.addAll(consensusGroupIdList);
             }
             if (!failedRegionList.isEmpty()) {
@@ -331,7 +320,7 @@ public MeasurementPath getmeasurementPath() {
 
   public void setMeasurementPath(final MeasurementPath measurementPath) {
     this.measurementPath = measurementPath;
-    measurementPathBytes = prepareMeasurementPathBytesData(measurementPath);
+    this.measurementPathBytes = prepareMeasurementPathBytesData(measurementPath);
   }
 
   public static ByteBuffer prepareMeasurementPathBytesData(final MeasurementPath measurementPath) {
@@ -356,6 +345,16 @@ public static ByteBuffer preparePatternTreeBytesData(final PathPatternTree patte
     return ByteBuffer.wrap(byteArrayOutputStream.toByteArray());
   }
 
+  public ByteBuffer prepareDataTypeBytesData() {
+    final ByteArrayOutputStream stream = new ByteArrayOutputStream(1);
+    try {
+      ReadWriteIOUtils.write(dataType, stream);
+    } catch (final IOException ignored) {
+      // ByteArrayOutputStream won't throw IOException
+    }
+    return ByteBuffer.wrap(stream.toByteArray());
+  }
+
   @Override
   public void serialize(final DataOutputStream stream) throws IOException {
     stream.writeShort(