add avro support for vector type

paimon-core/src/test/java/org/apache/paimon/append/AppendOnlyWriterTest.java

@@ -52,6 +52,7 @@
 import org.apache.paimon.table.FileStoreTableFactory;
 import org.apache.paimon.types.BlobType;
 import org.apache.paimon.types.DataType;
+import org.apache.paimon.types.DataTypes;
 import org.apache.paimon.types.IntType;
 import org.apache.paimon.types.RowType;
 import org.apache.paimon.types.VarCharType;
@@ -578,7 +579,7 @@ public void testNonSpillable() throws Exception {
         writer.close();
     }
 
-    /* @Test // TODO this can be enabled after avro supports vector
+    @Test
     public void testVectorStoreSameFormatUsesRowDataWriter() throws Exception {
         RowType vectorStoreSchema =
                 RowType.builder()
@@ -599,7 +600,7 @@ public void testVectorStoreSameFormatUsesRowDataWriter() throws Exception {
         assertThat(increment.newFilesIncrement().newFiles()).hasSize(1);
         DataFileMeta meta = increment.newFilesIncrement().newFiles().get(0);
         assertThat(meta.fileName()).doesNotContain(".vector");
-    } */
+    }
 
     private SimpleColStats initStats(Integer min, Integer max, long nullCount) {
         return new SimpleColStats(min, max, nullCount);

paimon-format/src/main/java/org/apache/paimon/format/avro/AvroSchemaConverter.java

@@ -30,6 +30,7 @@
 import org.apache.paimon.types.RowType;
 import org.apache.paimon.types.TimeType;
 import org.apache.paimon.types.TimestampType;
+import org.apache.paimon.types.VectorType;
 
 import org.apache.avro.LogicalTypes;
 import org.apache.avro.Schema;
@@ -260,8 +261,11 @@ public static Schema convertToSchema(
                 }
                 return nullable ? nullableSchema(map) : map;
             case ARRAY:
-                ArrayType arrayType = (ArrayType) dataType;
-                DataType elementType = arrayType.getElementType();
+            case VECTOR:
+                DataType elementType =
+                        dataType.getTypeRoot() == DataTypeRoot.ARRAY
+                                ? ((ArrayType) dataType).getElementType()
+                                : ((VectorType) dataType).getElementType();
 
                 ArrayBuilder<Schema> arrayBuilder = SchemaBuilder.builder().array();
 

paimon-format/src/main/java/org/apache/paimon/format/avro/AvroSchemaVisitor.java

@@ -24,6 +24,7 @@
 import org.apache.paimon.types.DataTypes;
 import org.apache.paimon.types.MapType;
 import org.apache.paimon.types.RowType;
+import org.apache.paimon.types.VectorType;
 
 import org.apache.avro.LogicalType;
 import org.apache.avro.LogicalTypes;
@@ -53,6 +54,8 @@ default T visit(Schema schema, DataType type) {
                 if (type instanceof MapType) {
                     MapType mapType = (MapType) type;
                     return visitArrayMap(schema, mapType.getKeyType(), mapType.getValueType());
+                } else if (type instanceof VectorType) {
+                    return visitArrayVector(schema, ((VectorType) type).getElementType());
                 } else {
                     return visitArray(
                             schema, type == null ? null : ((ArrayType) type).getElementType());
@@ -155,6 +158,8 @@ default T primitive(Schema primitive, DataType type) {
 
     T visitArray(Schema schema, DataType elementType);
 
+    T visitArrayVector(Schema schema, DataType elementType);
+
     T visitArrayMap(Schema schema, DataType keyType, DataType valueType);
 
     T visitMap(Schema schema, DataType valueType);

paimon-format/src/main/java/org/apache/paimon/format/avro/FieldReaderFactory.java

@@ -19,6 +19,7 @@
 package org.apache.paimon.format.avro;
 
 import org.apache.paimon.data.BinaryString;
+import org.apache.paimon.data.BinaryVector;
 import org.apache.paimon.data.Blob;
 import org.apache.paimon.data.BlobDescriptor;
 import org.apache.paimon.data.Decimal;
@@ -167,6 +168,12 @@ public FieldReader visitArray(Schema schema, @Nullable DataType elementType) {
         return new ArrayReader(elementReader);
     }
 
+    @Override
+    public FieldReader visitArrayVector(Schema schema, @Nullable DataType elementType) {
+        FieldReader elementReader = visit(schema.getElementType(), elementType);
+        return new ArrayVectorReader(elementReader, elementType);
+    }
+
     @Override
     public FieldReader visitArrayMap(Schema schema, DataType keyType, DataType valueType) {
         RowReader entryReader =
@@ -461,6 +468,22 @@ public void skip(Decoder decoder) throws IOException {
         }
     }
 
+    private static class ArrayVectorReader extends ArrayReader {
+
+        private final DataType elementType;
+
+        private ArrayVectorReader(FieldReader elementReader, DataType elementType) {
+            super(elementReader);
+            this.elementType = elementType;
+        }
+
+        @Override
+        public Object read(Decoder decoder, Object reuse) throws IOException {
+            GenericArray array = (GenericArray) super.read(decoder, reuse);
+            return BinaryVector.fromInternalArray(array, elementType);
+        }
+    }
+
     private static class ArrayMapReader implements FieldReader {
 
         private final RowReader entryReader;

paimon-format/src/main/java/org/apache/paimon/format/avro/FieldWriterFactory.java

@@ -27,6 +27,7 @@
 import org.apache.paimon.data.InternalArray;
 import org.apache.paimon.data.InternalMap;
 import org.apache.paimon.data.InternalRow;
+import org.apache.paimon.data.InternalVector;
 import org.apache.paimon.types.DataField;
 import org.apache.paimon.types.DataType;
 import org.apache.paimon.types.DataTypeRoot;
@@ -197,6 +198,22 @@ public FieldWriter visitArray(Schema schema, DataType elementType) {
         };
     }
 
+    @Override
+    public FieldWriter visitArrayVector(Schema schema, DataType elementType) {
+        FieldWriter elementWriter = visit(schema.getElementType(), elementType);
+        return (container, index, encoder) -> {
+            InternalVector vector = container.getVector(index);
+            encoder.writeArrayStart();
+            int numElements = vector.size();
+            encoder.setItemCount(numElements);
+            for (int i = 0; i < numElements; i += 1) {
+                encoder.startItem();
+                elementWriter.write(vector, i, encoder);
+            }
+            encoder.writeArrayEnd();
+        };
+    }
+
     @Override
     public FieldWriter visitArrayMap(Schema schema, DataType keyType, DataType valueType) {
         RowWriter entryWriter =

paimon-format/src/test/java/org/apache/paimon/format/avro/AvroFormatReadWriteTest.java

@@ -18,10 +18,18 @@
 
 package org.apache.paimon.format.avro;
 
+import org.apache.paimon.data.BinaryVector;
+import org.apache.paimon.data.GenericRow;
 import org.apache.paimon.format.FileFormat;
 import org.apache.paimon.format.FileFormatFactory;
 import org.apache.paimon.format.FormatReadWriteTest;
 import org.apache.paimon.options.Options;
+import org.apache.paimon.types.DataField;
+import org.apache.paimon.types.DataTypes;
+import org.apache.paimon.types.RowType;
+
+import java.util.ArrayList;
+import java.util.List;
 
 /** An avro {@link FormatReadWriteTest}. */
 public class AvroFormatReadWriteTest extends FormatReadWriteTest {
@@ -34,4 +42,25 @@ protected AvroFormatReadWriteTest() {
     protected FileFormat fileFormat() {
         return new AvroFileFormat(new FileFormatFactory.FormatContext(new Options(), 1024, 1024));
     }
+
+    @Override
+    protected RowType rowTypeForFullTypesTest() {
+        RowType rowWithoutVector = super.rowTypeForFullTypesTest();
+        List<DataField> fields = new ArrayList<>(rowWithoutVector.getFields());
+        int vectorFieldId = fields.stream().map(DataField::id).max(Integer::compare).get() + 1;
+        fields.add(new DataField(vectorFieldId, "embed", DataTypes.VECTOR(3, DataTypes.FLOAT())));
+        return new RowType(rowWithoutVector.isNullable(), fields);
+    }
+
+    @Override
+    protected GenericRow expectedRowForFullTypesTest() {
+        float[] vector = new float[] {1.0f, 2.0f, 3.0f};
+        GenericRow rowWithoutVector = super.expectedRowForFullTypesTest();
+        GenericRow row = new GenericRow(rowWithoutVector.getFieldCount() + 1);
+        for (int i = 0; i < rowWithoutVector.getFieldCount(); ++i) {
+            row.setField(i, rowWithoutVector.getField(i));
+        }
+        row.setField(rowWithoutVector.getFieldCount(), BinaryVector.fromPrimitiveArray(vector));
+        return row;
+    }
 }