slinkydeveloper commented on a change in pull request #18648: URL: https://github.com/apache/flink/pull/18648#discussion_r804637112
########## File path: flink-table/flink-sql-parser/src/main/java/org/apache/flink/sql/parser/ddl/SqlCompilePlan.java ########## @@ -0,0 +1,108 @@ +/* + * 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.flink.sql.parser.ddl; + +import org.apache.flink.sql.parser.dml.RichSqlInsert; +import org.apache.flink.sql.parser.dml.SqlStatementSet; + +import org.apache.calcite.sql.SqlCall; +import org.apache.calcite.sql.SqlCharStringLiteral; +import org.apache.calcite.sql.SqlKind; +import org.apache.calcite.sql.SqlNode; +import org.apache.calcite.sql.SqlOperator; +import org.apache.calcite.sql.SqlSpecialOperator; +import org.apache.calcite.sql.SqlWriter; +import org.apache.calcite.sql.parser.SqlParserPos; +import org.apache.calcite.util.NlsString; + +import javax.annotation.Nonnull; + +import java.util.Collections; +import java.util.List; + +/** + * AST node for {@code COMPILE PLAN 'planfile' [IF NOT EXISTS] FOR [DML]}. DML can be either a + * {@link RichSqlInsert} or a {@link SqlStatementSet}. + */ +public class SqlCompilePlan extends SqlCall { + + public static final SqlSpecialOperator OPERATOR = + new SqlSpecialOperator("CompilePlan", SqlKind.OTHER); + + private final SqlCharStringLiteral planFile; + private final boolean ifNotExists; + private SqlNode operand; + + public SqlCompilePlan( + SqlParserPos pos, SqlCharStringLiteral planFile, boolean ifNotExists, SqlNode operand) { + super(pos); + this.planFile = planFile; + this.ifNotExists = ifNotExists; + this.operand = checkOperand(operand); + } + + public String getPlanFile() { + return planFile.getValueAs(NlsString.class).getValue(); + } + + public boolean isIfNotExists() { + return ifNotExists; + } + + @Nonnull + @Override + public SqlOperator getOperator() { + return OPERATOR; + } + + @Nonnull + @Override + public List<SqlNode> getOperandList() { + return Collections.singletonList(operand); + } + + @Override + public void unparse(SqlWriter writer, int leftPrec, int rightPrec) { + writer.keyword("COMPILE PLAN"); + planFile.unparse(writer, leftPrec, rightPrec); + if (isIfNotExists()) { + writer.keyword("IF NOT EXISTS"); + } + writer.keyword("FOR"); + operand.unparse(writer, leftPrec, rightPrec); + } + + @Override + public void setOperand(int i, SqlNode operand) { + if (i == 0) { + this.operand = checkOperand(operand); + } else { + throw new UnsupportedOperationException( + "SqlCompilePlan supports only one operand with index 0"); + } + } + + private SqlNode checkOperand(SqlNode operand) { + if (!(operand instanceof RichSqlInsert || operand instanceof SqlStatementSet)) { + throw new UnsupportedOperationException( + "SqlCompilePlan supports only RichSqlInsert or SqlStatementSet as operand"); Review comment: No this happens only in case of a parser bug or a validator bug. It would probably be better to use the `assert` statement instead of `UnsupportedOperationException`, but the reason i used it is for consistency. -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected]
