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/*
 * 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 com.hazelcast.shaded.org.apache.calcite.sql;

import com.hazelcast.shaded.org.apache.calcite.sql.parser.SqlParserPos;
import com.hazelcast.shaded.org.apache.calcite.util.ImmutableNullableList;

import com.hazelcast.shaded.org.checkerframework.checker.nullness.qual.Nullable;

import java.util.List;

/**
 * Parse tree node that represents an {@code ORDER BY} on a query other than a
 * {@code SELECT} (e.g. {@code VALUES} or {@code UNION}).
 *
 * 

It is a purely syntactic operator, and is eliminated by * {@link com.hazelcast.shaded.org.apache.calcite.sql.validate.SqlValidatorImpl#performUnconditionalRewrites} * and replaced with the ORDER_OPERAND of SqlSelect. */ public class SqlOrderBy extends SqlCall { public static final SqlSpecialOperator OPERATOR = new Operator() { @SuppressWarnings("argument.type.incompatible") @Override public SqlCall createCall(@Nullable SqlLiteral functionQualifier, SqlParserPos pos, @Nullable SqlNode... operands) { return new SqlOrderBy(pos, operands[0], (SqlNodeList) operands[1], operands[2], operands[3]); } }; public final SqlNode query; public final SqlNodeList orderList; public final @Nullable SqlNode offset; public final @Nullable SqlNode fetch; //~ Constructors ----------------------------------------------------------- public SqlOrderBy(SqlParserPos pos, SqlNode query, SqlNodeList orderList, @Nullable SqlNode offset, @Nullable SqlNode fetch) { super(pos); this.query = query; this.orderList = orderList; this.offset = offset; this.fetch = fetch; } //~ Methods ---------------------------------------------------------------- @Override public SqlKind getKind() { return SqlKind.ORDER_BY; } @Override public SqlOperator getOperator() { return OPERATOR; } @SuppressWarnings("nullness") @Override public List getOperandList() { return ImmutableNullableList.of(query, orderList, offset, fetch); } /** Definition of {@code ORDER BY} operator. */ private static class Operator extends SqlSpecialOperator { private Operator() { // NOTE: make precedence lower then SELECT to avoid extra parens super("ORDER BY", SqlKind.ORDER_BY, 0); } @Override public SqlSyntax getSyntax() { return SqlSyntax.POSTFIX; } @Override public void unparse( SqlWriter writer, SqlCall call, int leftPrec, int rightPrec) { SqlOrderBy orderBy = (SqlOrderBy) call; final SqlWriter.Frame frame = writer.startList(SqlWriter.FrameTypeEnum.ORDER_BY); orderBy.query.unparse(writer, getLeftPrec(), getRightPrec()); if (orderBy.orderList != SqlNodeList.EMPTY) { writer.sep(getName()); writer.list(SqlWriter.FrameTypeEnum.ORDER_BY_LIST, SqlWriter.COMMA, orderBy.orderList); } if (orderBy.offset != null || orderBy.fetch != null) { writer.fetchOffset(orderBy.fetch, orderBy.offset); } writer.endList(frame); } } }





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