zjuwangg commented on a change in pull request #10231: [FLINK-14711][table] add alter and show function ddl URL: https://github.com/apache/flink/pull/10231#discussion_r347121223
########## File path: flink-table/flink-sql-parser/src/main/java/org/apache/flink/sql/parser/ddl/SqlAlterFunction.java ########## @@ -0,0 +1,101 @@ +/* + * 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.calcite.sql.SqlCall; +import org.apache.calcite.sql.SqlCharStringLiteral; +import org.apache.calcite.sql.SqlIdentifier; +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.ImmutableNullableList; + +import javax.annotation.Nonnull; + +import java.util.List; + +import static java.util.Objects.requireNonNull; + +/** + * Alter Function Sql Call. + */ +public class SqlAlterFunction extends SqlCall { + public static final SqlSpecialOperator OPERATOR = new SqlSpecialOperator("ALTER FUNCTION", SqlKind.OTHER); + private final SqlIdentifier functionName; + private SqlCharStringLiteral functionClassName; + private SqlCharStringLiteral functionLanguage; + private final boolean ifExists; + private final boolean isSystemFunction; + + public SqlAlterFunction( + SqlParserPos pos, + SqlIdentifier functionName, + SqlCharStringLiteral functionClassName, + SqlCharStringLiteral functionLanguage, + boolean ifExists, + boolean isSystemFunction) { + super(pos); + this.functionName = requireNonNull(functionName, "functionName should not be null"); + this.functionClassName = requireNonNull(functionClassName, "functionClassName should not be null"); + this.isSystemFunction = requireNonNull(isSystemFunction); + this.functionLanguage = functionLanguage; + this.ifExists = ifExists; + + } + + @Nonnull + @Override + public SqlOperator getOperator() { + return OPERATOR; + } + + @Override + public void unparse(SqlWriter writer, int leftPrec, int rightPrec) { + writer.keyword("ALTER"); + if (isSystemFunction) { + writer.keyword("TEMPORARY SYSTEM"); + } else { + writer.keyword("TEMPORARY"); + } + writer.keyword("FUNCTION"); + if (ifExists) { + writer.keyword("IF EXISTS"); + } + functionName.unparse(writer, leftPrec, rightPrec); + writer.keyword("AS"); + functionClassName.unparse(writer, leftPrec, rightPrec); + if (functionLanguage != null) { + writer.keyword("LANGUAGE"); + functionLanguage.unparse(writer, leftPrec, rightPrec); + } + } + + @Nonnull + @Override + public List<SqlNode> getOperandList() { + return ImmutableNullableList.of(functionName, functionClassName, functionLanguage); + } + + public String[] getFullFunctionName() { + return functionName.names.toArray(new String[0]); + } +} Review comment: Should this class provide a getter for `language`? ---------------------------------------------------------------- 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. For queries about this service, please contact Infrastructure at: us...@infra.apache.org With regards, Apache Git Services
