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[FLINK-24939][table] Introduce "SHOW CREATE CATALOG" Syntax
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67 changes: 67 additions & 0 deletions
67
.../flink-sql-parser/src/main/java/org/apache/flink/sql/parser/dql/SqlShowCreateCatalog.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,67 @@ | ||
| /* | ||
| * 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.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; | ||
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| import java.util.Collections; | ||
| import java.util.List; | ||
| import java.util.Objects; | ||
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| /** SHOW CREATE CATALOG sql call. */ | ||
| public class SqlShowCreateCatalog extends SqlShowCreate { | ||
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| public static final SqlSpecialOperator OPERATOR = | ||
| new SqlSpecialOperator("SHOW CREATE CATALOG", SqlKind.OTHER_DDL); | ||
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| protected final SqlIdentifier catalogName; | ||
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| public SqlShowCreateCatalog(SqlParserPos pos, SqlIdentifier catalogName) { | ||
| super(pos, catalogName); | ||
| this.catalogName = catalogName; | ||
| } | ||
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| public String[] getCatalogName() { | ||
| return Objects.isNull(this.catalogName) | ||
| ? new String[] {} | ||
| : catalogName.names.toArray(new String[0]); | ||
| } | ||
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| @Override | ||
| public SqlOperator getOperator() { | ||
| return OPERATOR; | ||
| } | ||
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| @Override | ||
| public List<SqlNode> getOperandList() { | ||
| return Collections.singletonList(sqlIdentifier); | ||
| } | ||
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| @Override | ||
| public void unparse(SqlWriter writer, int leftPrec, int rightPrec) { | ||
| writer.keyword("SHOW CREATE CATALOG"); | ||
| sqlIdentifier.unparse(writer, leftPrec, rightPrec); | ||
| } | ||
| } |
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65 changes: 65 additions & 0 deletions
65
...-api-java/src/main/java/org/apache/flink/table/operations/ShowCreateCatalogOperation.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,65 @@ | ||
| /* | ||
| * 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.table.operations; | ||
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| import org.apache.flink.annotation.Internal; | ||
| import org.apache.flink.table.api.ValidationException; | ||
| import org.apache.flink.table.api.internal.ShowCreateUtil; | ||
| import org.apache.flink.table.api.internal.TableResultInternal; | ||
| import org.apache.flink.table.catalog.CatalogDescriptor; | ||
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| import static org.apache.flink.table.api.internal.TableResultUtils.buildStringArrayResult; | ||
| import static org.apache.flink.util.Preconditions.checkNotNull; | ||
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| /** Operation to describe a SHOW CREATE CATALOG statement. */ | ||
| @Internal | ||
| public class ShowCreateCatalogOperation implements ShowOperation { | ||
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| private final String catalogName; | ||
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| public ShowCreateCatalogOperation(String catalogName) { | ||
| this.catalogName = checkNotNull(catalogName, "Catalog name must not be null"); | ||
| } | ||
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| public String getCatalogName() { | ||
| return catalogName; | ||
| } | ||
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| @Override | ||
| public String asSummaryString() { | ||
| return String.format("SHOW CREATE CATALOG %s", catalogName); | ||
| } | ||
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| @Override | ||
| public TableResultInternal execute(Context ctx) { | ||
| CatalogDescriptor catalogDescriptor = | ||
| ctx.getCatalogManager() | ||
| .getCatalogStore() | ||
| .getCatalog(catalogName) | ||
| .orElseThrow( | ||
| () -> | ||
| new ValidationException( | ||
| String.format( | ||
| "Cannot obtain metadata from Catalog %s.", | ||
| catalogName))); | ||
| String resultRow = ShowCreateUtil.buildShowCreateCatalogRow(catalogDescriptor); | ||
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| return buildStringArrayResult("result", new String[] {resultRow}); | ||
| } | ||
| } |
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