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SqlNthValueInFrame.java
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1 /*
2  * Copyright 2022 HEAVY.AI, Inc.
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  * http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 
17 package com.mapd.parser.extension.ddl;
18 
19 import org.apache.calcite.sql.SqlAggFunction;
20 import org.apache.calcite.sql.SqlFunctionCategory;
21 import org.apache.calcite.sql.SqlKind;
22 import org.apache.calcite.sql.type.OperandTypes;
23 import org.apache.calcite.sql.type.ReturnTypes;
24 import org.apache.calcite.sql.type.SqlTypeFamily;
25 import org.apache.calcite.util.Optionality;
26 
27 // COPY of SqlNthValueAggFunction in Calcite 1.25 code base with slight modifications
28 public class SqlNthValueInFrame extends SqlAggFunction {
29  public SqlNthValueInFrame(String functionName) {
30  super(functionName,
31  null,
32  SqlKind.NTH_VALUE,
33  ReturnTypes.ARG0_NULLABLE_IF_EMPTY,
34  null,
35  OperandTypes.family(SqlTypeFamily.ANY, SqlTypeFamily.INTEGER),
36  SqlFunctionCategory.NUMERIC,
37  false,
38  true,
39  Optionality.FORBIDDEN);
40  }
41 
42  @Override
43  public boolean allowsFraming() {
44  return true;
45  }
46 
47  @Override
48  public boolean allowsNullTreatment() {
49  return true;
50  }
51 }