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[FLINK-36085][table] Refactor SHOW operations with LIKE/ILIKE
Signed-off-by: snuyanzin <snuyanzin@gmail.com>
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flink-table/flink-sql-parser/src/main/java/org/apache/flink/sql/parser/dql/SqlShowCall.java
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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. | ||
| */ | ||
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| package org.apache.flink.sql.parser.dql; | ||
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| import org.apache.calcite.sql.SqlCall; | ||
| import org.apache.calcite.sql.SqlCharStringLiteral; | ||
| import org.apache.calcite.sql.SqlIdentifier; | ||
| import org.apache.calcite.sql.SqlNode; | ||
| import org.apache.calcite.sql.SqlOperator; | ||
| import org.apache.calcite.sql.SqlWriter; | ||
| import org.apache.calcite.sql.parser.SqlParserPos; | ||
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| import java.util.Collections; | ||
| import java.util.List; | ||
| import java.util.Objects; | ||
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| public abstract class SqlShowCall extends SqlCall { | ||
| private final String preposition; | ||
| private final SqlIdentifier sqlIdentifier; | ||
| // different like type such as like, ilike | ||
| private final String likeType; | ||
| private final SqlCharStringLiteral likeLiteral; | ||
| private final boolean notLike; | ||
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| public SqlShowCall( | ||
| SqlParserPos pos, | ||
| String preposition, | ||
| SqlIdentifier databaseName, | ||
| String likeType, | ||
| SqlCharStringLiteral likeLiteral, | ||
| boolean notLike) { | ||
| super(pos); | ||
| this.preposition = preposition; | ||
| this.sqlIdentifier = preposition != null ? databaseName : null; | ||
| this.likeType = likeType; | ||
| this.likeLiteral = likeType == null ? null : likeLiteral; | ||
| this.notLike = likeType != null && notLike; | ||
| } | ||
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| @Override | ||
| public abstract SqlOperator getOperator(); | ||
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| @Override | ||
| public List<SqlNode> getOperandList() { | ||
| return Objects.isNull(sqlIdentifier) | ||
| ? Collections.emptyList() | ||
| : Collections.singletonList(sqlIdentifier); | ||
| } | ||
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| @Override | ||
| public void unparse(SqlWriter writer, int leftPrec, int rightPrec) { | ||
| String keyword = getOperationName(); | ||
| if (preposition == null) { | ||
| writer.keyword(keyword); | ||
| } else if (sqlIdentifier != null) { | ||
| writer.keyword(keyword + " " + preposition); | ||
| sqlIdentifier.unparse(writer, leftPrec, rightPrec); | ||
| } | ||
| if (isWithLike()) { | ||
| final String notPrefix = isNotLike() ? "NOT " : ""; | ||
| writer.keyword(String.format("%s%s '%s'", notPrefix, likeType, getLikeSqlPattern())); | ||
| } | ||
| } | ||
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| public String getPreposition() { | ||
| return preposition; | ||
| } | ||
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| public List<String> getSqlIdentifierNameList() { | ||
| return Objects.isNull(this.sqlIdentifier) ? Collections.emptyList() : sqlIdentifier.names; | ||
| } | ||
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| public boolean isWithLike() { | ||
| return likeType != null; | ||
| } | ||
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| public String getLikeType() { | ||
| return likeType; | ||
| } | ||
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| public String getLikeSqlPattern() { | ||
| return Objects.isNull(likeLiteral) ? null : likeLiteral.getValueAs(String.class); | ||
| } | ||
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| public boolean isNotLike() { | ||
| return notLike; | ||
| } | ||
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| abstract String getOperationName(); | ||
| } |
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