add license

iotdb-api/udf-api/src/main/java/org/apache/iotdb/udf/api/relational/AggregationFunction.java

@@ -1,3 +1,22 @@
+/*
+ * 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.iotdb.udf.api.relational;
 
 public interface AggregationFunction extends SQLFunction {}

iotdb-api/udf-api/src/main/java/org/apache/iotdb/udf/api/relational/SQLFunction.java

@@ -1,3 +1,22 @@
+/*
+ * 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.iotdb.udf.api.relational;
 
 public interface SQLFunction {}

iotdb-api/udf-api/src/main/java/org/apache/iotdb/udf/api/relational/ScalarFunction.java

@@ -1,3 +1,22 @@
+/*
+ * 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.iotdb.udf.api.relational;
 
 public interface ScalarFunction extends SQLFunction {}

iotdb-api/udf-api/src/main/java/org/apache/iotdb/udf/api/relational/TableFunction.java

@@ -1,3 +1,22 @@
+/*
+ * 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.iotdb.udf.api.relational;
 
 public interface TableFunction extends SQLFunction {}

iotdb-api/udf-api/src/main/java/org/apache/iotdb/udf/api/relational/access/Record.java

@@ -0,0 +1,129 @@
+/*
+ * 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.iotdb.udf.api.relational.access;
+
+import org.apache.iotdb.udf.api.type.Binary;
+import org.apache.iotdb.udf.api.type.Type;
+
+import java.io.IOException;
+
+public interface Record {
+  /**
+   * Returns the int value at the specified column in this row.
+   *
+   * <p>Users need to ensure that the data type of the specified column is {@code TSDataType.INT32}.
+   *
+   * @param columnIndex index of the specified column
+   * @return the int value at the specified column in this row
+   * @throws IOException if an I/O error occurs
+   */
+  int getInt(int columnIndex) throws IOException;
+
+  /**
+   * Returns the long value at the specified column in this row.
+   *
+   * <p>Users need to ensure that the data type of the specified column is {@code TSDataType.INT64}.
+   *
+   * @param columnIndex index of the specified column
+   * @return the long value at the specified column in this row
+   * @throws IOException if an I/O error occurs
+   */
+  long getLong(int columnIndex) throws IOException;
+
+  /**
+   * Returns the float value at the specified column in this row.
+   *
+   * <p>Users need to ensure that the data type of the specified column is {@code TSDataType.FLOAT}.
+   *
+   * @param columnIndex index of the specified column
+   * @return the float value at the specified column in this row
+   * @throws IOException if an I/O error occurs
+   */
+  float getFloat(int columnIndex) throws IOException;
+
+  /**
+   * Returns the double value at the specified column in this row.
+   *
+   * <p>Users need to ensure that the data type of the specified column is {@code
+   * TSDataType.DOUBLE}.
+   *
+   * @param columnIndex index of the specified column
+   * @return the double value at the specified column in this row
+   * @throws IOException if an I/O error occurs
+   */
+  double getDouble(int columnIndex) throws IOException;
+
+  /**
+   * Returns the boolean value at the specified column in this row.
+   *
+   * <p>Users need to ensure that the data type of the specified column is {@code
+   * TSDataType.BOOLEAN}.
+   *
+   * @param columnIndex index of the specified column
+   * @return the boolean value at the specified column in this row
+   * @throws IOException if an I/O error occurs
+   */
+  boolean getBoolean(int columnIndex) throws IOException;
+
+  /**
+   * Returns the Binary value at the specified column in this row.
+   *
+   * <p>Users need to ensure that the data type of the specified column is {@code TSDataType.TEXT}.
+   *
+   * @param columnIndex index of the specified column
+   * @return the Binary value at the specified column in this row
+   * @throws IOException if an I/O error occurs
+   */
+  Binary getBinary(int columnIndex) throws IOException;
+
+  /**
+   * Returns the String value at the specified column in this row.
+   *
+   * <p>Users need to ensure that the data type of the specified column is {@code TSDataType.TEXT}.
+   *
+   * @param columnIndex index of the specified column
+   * @return the String value at the specified column in this row
+   * @throws IOException if an I/O error occurs
+   */
+  String getString(int columnIndex) throws IOException;
+
+  /**
+   * Returns the actual data type of the value at the specified column in this row.
+   *
+   * @param columnIndex index of the specified column
+   * @return the actual data type of the value at the specified column in this row
+   */
+  Type getDataType(int columnIndex);
+
+  /**
+   * Returns {@code true} if the value of the specified column is null.
+   *
+   * @param columnIndex index of the specified column
+   * @return {@code true} if the value of the specified column is null
+   */
+  boolean isNull(int columnIndex) throws IOException;
+
+  /**
+   * Returns the number of columns.
+   *
+   * @return the number of columns
+   */
+  int size();
+}