Github user arina-ielchiieva commented on a diff in the pull request:
https://github.com/apache/drill/pull/774#discussion_r146135479
--- Diff:
contrib/storage-opentsdb/src/main/java/org/apache/drill/exec/store/openTSDB/DrillOpenTSDBTable.java
---
@@ -0,0 +1,69 @@
+/*
+ * 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.drill.exec.store.openTSDB;
+
+import com.google.common.collect.Lists;
+import org.apache.calcite.rel.type.RelDataType;
+import org.apache.calcite.rel.type.RelDataTypeFactory;
+import org.apache.calcite.sql.type.SqlTypeName;
+import org.apache.drill.exec.planner.logical.DynamicDrillTable;
+import org.apache.drill.exec.store.openTSDB.client.OpenTSDBTypes;
+import org.apache.drill.exec.store.openTSDB.client.Schema;
+import org.apache.drill.exec.store.openTSDB.dto.ColumnDTO;
+
+import java.util.List;
+
+public class DrillOpenTSDBTable extends DynamicDrillTable {
+
+ private final Schema schema;
+
+ public DrillOpenTSDBTable(String storageEngineName,
OpenTSDBStoragePlugin plugin, Schema schema, OpenTSDBScanSpec scanSpec) {
+ super(plugin, storageEngineName, scanSpec);
+ this.schema = schema;
+ }
+
+ @Override
+ public RelDataType getRowType(final RelDataTypeFactory typeFactory) {
+ List<String> names = Lists.newArrayList();
+ List<RelDataType> types = Lists.newArrayList();
+ convertToRelDataType(typeFactory, names, types);
+ return typeFactory.createStructType(types, names);
+ }
+
+ private void convertToRelDataType(RelDataTypeFactory typeFactory,
List<String> names, List<RelDataType> types) {
+ for (ColumnDTO column : schema.getColumns()) {
+ names.add(column.getColumnName());
+ RelDataType type = getSqlTypeFromOpenTSDBType(typeFactory,
column.getColumnType());
+ type = typeFactory.createTypeWithNullability(type,
column.isNullable());
+ types.add(type);
+ }
+ }
+
+ private RelDataType getSqlTypeFromOpenTSDBType(RelDataTypeFactory
typeFactory, OpenTSDBTypes type) {
+ switch (type) {
+ case STRING:
+ return typeFactory.createSqlType(SqlTypeName.VARCHAR,
Integer.MAX_VALUE);
+ case DOUBLE:
+ return typeFactory.createSqlType(SqlTypeName.DOUBLE);
+ case TIMESTAMP:
+ return typeFactory.createSqlType(SqlTypeName.TIMESTAMP);
+ default:
+ throw new UnsupportedOperationException("Unsupported type.");
--- End diff --
I guess it's better to add error message indicating which type is
unsupported and which types are currently supported.
---
