apache · robert3005 · Jun 17, 2026
@@ -46,6 +46,8 @@
 import org.apache.arrow.adapter.jdbc.consumer.CompositeJdbcConsumer;
 import org.apache.arrow.adapter.jdbc.consumer.DateConsumer;
 import org.apache.arrow.adapter.jdbc.consumer.Decimal256Consumer;
+import org.apache.arrow.adapter.jdbc.consumer.Decimal32Consumer;
+import org.apache.arrow.adapter.jdbc.consumer.Decimal64Consumer;
 import org.apache.arrow.adapter.jdbc.consumer.DecimalConsumer;
 import org.apache.arrow.adapter.jdbc.consumer.DoubleConsumer;
 import org.apache.arrow.adapter.jdbc.consumer.FloatConsumer;
@@ -66,6 +68,8 @@
 import org.apache.arrow.vector.BitVector;
 import org.apache.arrow.vector.DateDayVector;
 import org.apache.arrow.vector.Decimal256Vector;
+import org.apache.arrow.vector.Decimal32Vector;
+import org.apache.arrow.vector.Decimal64Vector;
 import org.apache.arrow.vector.DecimalVector;
 import org.apache.arrow.vector.FieldVector;
 import org.apache.arrow.vector.Float4Vector;
@@ -510,10 +514,21 @@ public static JdbcConsumer getConsumer(
         }
       case Decimal:
         final RoundingMode bigDecimalRoundingMode = config.getBigDecimalRoundingMode();
-        if (((ArrowType.Decimal) arrowType).getBitWidth() == 256) {
+        final int decimalBitWidth = ((ArrowType.Decimal) arrowType).getBitWidth();
+        if (decimalBitWidth == 256) {
           return Decimal256Consumer.createConsumer(
               (Decimal256Vector) vector, columnIndex, nullable, bigDecimalRoundingMode);
+        } else if (decimalBitWidth == 128) {
+          return DecimalConsumer.createConsumer(
+              (DecimalVector) vector, columnIndex, nullable, bigDecimalRoundingMode);
+        } else if (decimalBitWidth == 64) {
+          return Decimal64Consumer.createConsumer(
+              (Decimal64Vector) vector, columnIndex, nullable, bigDecimalRoundingMode);
+        } else if (decimalBitWidth == 32) {
+          return Decimal32Consumer.createConsumer(
+              (Decimal32Vector) vector, columnIndex, nullable, bigDecimalRoundingMode);
         } else {
+          // Any other bit width maps to MinorType.DECIMAL, so the root created a DecimalVector.
           return DecimalConsumer.createConsumer(
               (DecimalVector) vector, columnIndex, nullable, bigDecimalRoundingMode);
         }

@@ -0,0 +1,114 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.apache.arrow.adapter.jdbc.consumer;
+
+import java.math.BigDecimal;
+import java.math.RoundingMode;
+import java.sql.ResultSet;
+import java.sql.SQLException;
+import org.apache.arrow.vector.Decimal32Vector;
+
+/**
+ * Consumer which consume decimal type values from {@link ResultSet}. Write the data to {@link
+ * org.apache.arrow.vector.Decimal32Vector}.
+ */
+public abstract class Decimal32Consumer extends BaseConsumer<Decimal32Vector> {
+  private final RoundingMode bigDecimalRoundingMode;
+  private final int scale;
+
+  /**
+   * Constructs a new consumer.
+   *
+   * @param vector the underlying vector for the consumer.
+   * @param index the column id for the consumer.
+   */
+  public Decimal32Consumer(Decimal32Vector vector, int index) {
+    this(vector, index, null);
+  }
+
+  /**
+   * Constructs a new consumer, with optional coercibility.
+   *
+   * @param vector the underlying vector for the consumer.
+   * @param index the column index for the consumer.
+   * @param bigDecimalRoundingMode java.math.RoundingMode to be applied if the BigDecimal scale does
+   *     not match that of the target vector. Set to null to retain strict matching behavior (scale
+   *     of source and target vector must match exactly).
+   */
+  public Decimal32Consumer(Decimal32Vector vector, int index, RoundingMode bigDecimalRoundingMode) {
+    super(vector, index);
+    this.bigDecimalRoundingMode = bigDecimalRoundingMode;
+    this.scale = vector.getScale();
+  }
+
+  /** Creates a consumer for {@link Decimal32Vector}. */
+  public static JdbcConsumer<Decimal32Vector> createConsumer(
+      Decimal32Vector vector, int index, boolean nullable, RoundingMode bigDecimalRoundingMode) {
+    if (nullable) {
+      return new NullableDecimal32Consumer(vector, index, bigDecimalRoundingMode);
+    } else {
+      return new NonNullableDecimal32Consumer(vector, index, bigDecimalRoundingMode);
+    }
+  }
+
+  protected void set(BigDecimal value) {
+    if (bigDecimalRoundingMode != null && value.scale() != scale) {
+      value = value.setScale(scale, bigDecimalRoundingMode);
+    }
+    vector.set(currentIndex, value);
+  }
+
+  /** Consumer for nullable decimal. */
+  static class NullableDecimal32Consumer extends Decimal32Consumer {
+
+    /** Instantiate a Decimal32Consumer. */
+    public NullableDecimal32Consumer(
+        Decimal32Vector vector, int index, RoundingMode bigDecimalRoundingMode) {
+      super(vector, index, bigDecimalRoundingMode);
+    }
+
+    @Override
+    public void consume(ResultSet resultSet) throws SQLException {
+      BigDecimal value = resultSet.getBigDecimal(columnIndexInResultSet);
+      if (!resultSet.wasNull()) {
+        // for fixed width vectors, we have allocated enough memory proactively,
+        // so there is no need to call the setSafe method here.
+        set(value);
+      }
+      currentIndex++;
+    }
+  }
+
+  /** Consumer for non-nullable decimal. */
+  static class NonNullableDecimal32Consumer extends Decimal32Consumer {
+
+    /** Instantiate a Decimal32Consumer. */
+    public NonNullableDecimal32Consumer(
+        Decimal32Vector vector, int index, RoundingMode bigDecimalRoundingMode) {
+      super(vector, index, bigDecimalRoundingMode);
+    }
+
+    @Override
+    public void consume(ResultSet resultSet) throws SQLException {
+      BigDecimal value = resultSet.getBigDecimal(columnIndexInResultSet);
+      // for fixed width vectors, we have allocated enough memory proactively,
+      // so there is no need to call the setSafe method here.
+      set(value);
+      currentIndex++;
+    }
+  }
+}
@@ -0,0 +1,114 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.apache.arrow.adapter.jdbc.consumer;
+
+import java.math.BigDecimal;
+import java.math.RoundingMode;
+import java.sql.ResultSet;
+import java.sql.SQLException;
+import org.apache.arrow.vector.Decimal64Vector;
+
+/**
+ * Consumer which consume decimal type values from {@link ResultSet}. Write the data to {@link
+ * org.apache.arrow.vector.Decimal64Vector}.
+ */
+public abstract class Decimal64Consumer extends BaseConsumer<Decimal64Vector> {
+  private final RoundingMode bigDecimalRoundingMode;
+  private final int scale;
+
+  /**
+   * Constructs a new consumer.
+   *
+   * @param vector the underlying vector for the consumer.
+   * @param index the column id for the consumer.
+   */
+  public Decimal64Consumer(Decimal64Vector vector, int index) {
+    this(vector, index, null);
+  }
+
+  /**
+   * Constructs a new consumer, with optional coercibility.
+   *
+   * @param vector the underlying vector for the consumer.
+   * @param index the column index for the consumer.
+   * @param bigDecimalRoundingMode java.math.RoundingMode to be applied if the BigDecimal scale does
+   *     not match that of the target vector. Set to null to retain strict matching behavior (scale
+   *     of source and target vector must match exactly).
+   */
+  public Decimal64Consumer(Decimal64Vector vector, int index, RoundingMode bigDecimalRoundingMode) {
+    super(vector, index);
+    this.bigDecimalRoundingMode = bigDecimalRoundingMode;
+    this.scale = vector.getScale();
+  }
+
+  /** Creates a consumer for {@link Decimal64Vector}. */
+  public static JdbcConsumer<Decimal64Vector> createConsumer(
+      Decimal64Vector vector, int index, boolean nullable, RoundingMode bigDecimalRoundingMode) {
+    if (nullable) {
+      return new NullableDecimal64Consumer(vector, index, bigDecimalRoundingMode);
+    } else {
+      return new NonNullableDecimal64Consumer(vector, index, bigDecimalRoundingMode);
+    }
+  }
+
+  protected void set(BigDecimal value) {
+    if (bigDecimalRoundingMode != null && value.scale() != scale) {
+      value = value.setScale(scale, bigDecimalRoundingMode);
+    }
+    vector.set(currentIndex, value);
+  }
+
+  /** Consumer for nullable decimal. */
+  static class NullableDecimal64Consumer extends Decimal64Consumer {
+
+    /** Instantiate a Decimal64Consumer. */
+    public NullableDecimal64Consumer(
+        Decimal64Vector vector, int index, RoundingMode bigDecimalRoundingMode) {
+      super(vector, index, bigDecimalRoundingMode);
+    }
+
+    @Override
+    public void consume(ResultSet resultSet) throws SQLException {
+      BigDecimal value = resultSet.getBigDecimal(columnIndexInResultSet);
+      if (!resultSet.wasNull()) {
+        // for fixed width vectors, we have allocated enough memory proactively,
+        // so there is no need to call the setSafe method here.
+        set(value);
+      }
+      currentIndex++;
+    }
+  }
+
+  /** Consumer for non-nullable decimal. */
+  static class NonNullableDecimal64Consumer extends Decimal64Consumer {
+
+    /** Instantiate a Decimal64Consumer. */
+    public NonNullableDecimal64Consumer(
+        Decimal64Vector vector, int index, RoundingMode bigDecimalRoundingMode) {
+      super(vector, index, bigDecimalRoundingMode);
+    }
+
+    @Override
+    public void consume(ResultSet resultSet) throws SQLException {
+      BigDecimal value = resultSet.getBigDecimal(columnIndexInResultSet);
+      // for fixed width vectors, we have allocated enough memory proactively,
+      // so there is no need to call the setSafe method here.
+      set(value);
+      currentIndex++;
+    }
+  }
+}