varchar and varbinary are compatible

Author: rui-mo

velox/connectors/hive/HiveConnector.cpp

@@ -309,7 +309,7 @@ bool testFilters(
 template <TypeKind ToKind>
 velox::variant convertFromString(const std::optional<std::string>& value) {
   if (value.has_value()) {
-    if constexpr (ToKind == TypeKind::VARCHAR) {
+    if constexpr (ToKind == TypeKind::VARCHAR || ToKind == TypeKind::VARBINARY) {
       return velox::variant(value.value());
     }
     bool nullOutput = false;

velox/vector/BaseVector.h

@@ -668,7 +668,10 @@ class BaseVector {
   // two unknowns but values cannot be assigned into an unknown 'left'
   // from a not-unknown 'right'.
   static bool compatibleKind(TypeKind left, TypeKind right) {
-    return left == right || right == TypeKind::UNKNOWN;
+    // Vectors of VARCHAR and VARBINARY are compatible with each other.
+    bool varcharAndBinary = (left == TypeKind::VARCHAR && right == TypeKind::VARBINARY) ||
+        (left == TypeKind::VARBINARY && right == TypeKind::VARCHAR);
+    return left == right || right == TypeKind::UNKNOWN || varcharAndBinary;
   }
 
   /// Returns a brief summary of the vector. If 'recursive' is true, includes a