tinyint works

Author: SiyaoIsHiding

core/src/main/java/com/datastax/oss/driver/internal/core/type/codec/VectorCodec.java

@@ -33,6 +33,7 @@
 import java.util.Iterator;
 import java.util.List;
 import java.util.NoSuchElementException;
+import java.util.stream.Collectors;
 
 public class VectorCodec<SubtypeT> implements TypeCodec<CqlVector<SubtypeT>> {
 
@@ -95,8 +96,17 @@ public CqlVector<SubtypeT> decode(
 
   @NonNull
   @Override
-  public String format(@Nullable CqlVector<SubtypeT> value) {
-    return value == null ? "NULL" : Iterables.toString(value);
+  public String format(CqlVector<SubtypeT> value) {
+    if (value == null) return "NULL";
+
+    // if the subtype is a string, double quote
+    if (!value.isEmpty() && value.iterator().next() instanceof String)
+      return value.stream()
+              .map(s -> (String) s)
+              .map(s -> "\"" + s + "\"")
+              .collect(Collectors.joining(", ", "[", "]"));
+
+    return Iterables.toString(value);
   }
 
   @Nullable

integration-tests/src/test/java/com/datastax/oss/driver/core/data/DataTypeIT.java

@@ -46,6 +46,7 @@
 import com.datastax.oss.driver.api.core.type.TupleType;
 import com.datastax.oss.driver.api.core.type.UserDefinedType;
 import com.datastax.oss.driver.api.core.type.codec.TypeCodec;
+import com.datastax.oss.driver.api.core.type.reflect.GenericType;
 import com.datastax.oss.driver.api.testinfra.ccm.CcmRule;
 import com.datastax.oss.driver.api.testinfra.session.SessionRule;
 import com.datastax.oss.driver.categories.ParallelizableTests;
@@ -266,8 +267,8 @@ public static Object[][] typeSamples() {
 
               // change the vector subtype into arbitrary type
               if (o[0] == DataTypes.INT) {
-                CqlVector<Float> vector = CqlVector.newInstance(1.1f, 2.2f, 3.3f);
-                samples.add(new Object[] {DataTypes.vectorOf(DataTypes.FLOAT, 3), vector});
+                CqlVector<Byte> vector = CqlVector.newInstance((byte) 1, (byte) 2, (byte) 3);
+                samples.add(new Object[] {DataTypes.vectorOf(DataTypes.TINYINT, 3), vector});
               }
               return samples.stream();
             })