[mysql] Use READ type for all records in snapshot reading (#842)

flink-connector-mysql-cdc/src/main/java/com/ververica/cdc/connectors/mysql/source/utils/RecordUtils.java

@@ -147,10 +147,11 @@ public class RecordUtils {
                             Envelope.Operation.forCode(
                                     value.getString(Envelope.FieldName.OPERATION));
                     switch (operation) {
+                        case CREATE:
                         case UPDATE:
                             Envelope envelope = Envelope.fromSchema(binlog.valueSchema());
                             Struct source = value.getStruct(Envelope.FieldName.SOURCE);
-                            Struct updateAfter = value.getStruct(Envelope.FieldName.AFTER);
+                            Struct after = value.getStruct(Envelope.FieldName.AFTER);
                             Instant fetchTs =
                                     Instant.ofEpochMilli(
                                             (Long) source.get(Envelope.FieldName.TIMESTAMP));
@@ -163,15 +164,12 @@ public class RecordUtils {
                                             binlog.keySchema(),
                                             binlog.key(),
                                             binlog.valueSchema(),
-                                            envelope.read(updateAfter, source, fetchTs));
+                                            envelope.read(after, source, fetchTs));
                             snapshotRecords.put(key, record);
                             break;
                         case DELETE:
                             snapshotRecords.remove(key);
                             break;
-                        case CREATE:
-                            snapshotRecords.put(key, binlog);
-                            break;
                         case READ:
                             throw new IllegalStateException(
                                     String.format(