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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.util.Optionality;
25 
26 // COPY of SqlNthValueAggFunction in Calcite 1.25 code base with slight modifications
27 public class SqlNthValueInFrame extends SqlAggFunction {
28  public SqlNthValueInFrame(String functionName) {
29  super(functionName,
30  null,
31  SqlKind.NTH_VALUE,
32  ReturnTypes.ARG0_NULLABLE_IF_EMPTY,
33  null,
34  OperandTypes.ANY_NUMERIC,
35  SqlFunctionCategory.NUMERIC,
36  false,
37  true,
38  Optionality.FORBIDDEN);
39  }
40 
41  @Override
42  public boolean allowsFraming() {
43  return true;
44  }
45 
46  @Override
47  public boolean allowsNullTreatment() {
48  return true;
49  }
50 }