Github user xubo245 commented on a diff in the pull request:
https://github.com/apache/carbondata/pull/2221#discussion_r184308365
--- Diff:
store/sdk/src/test/java/org/apache/carbondata/sdk/file/CarbonReaderExample.java
---
@@ -0,0 +1,80 @@
+/*
+ * 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.carbondata.sdk.file;
+
+import java.io.File;
+import java.io.FilenameFilter;
+import java.util.List;
+
+import org.apache.commons.io.FileUtils;
+
+import org.apache.carbondata.core.metadata.datatype.DataTypes;
+import
org.apache.carbondata.core.metadata.schema.table.column.ColumnSchema;
+
+/**
+ * Example for testing CarbonReader
+ */
+public class CarbonReaderExample {
+ public static void main(String[] args) throws Exception {
+ String path = "./testWriteFiles";
+ FileUtils.deleteDirectory(new File(path));
+
+ Field[] fields = new Field[2];
+ fields[0] = new Field("name", DataTypes.STRING);
+ fields[1] = new Field("age", DataTypes.INT);
+
+ CarbonWriterBuilder builder = CarbonWriter.builder()
+ .withSchema(new Schema(fields))
+ .isTransactionalTable(true)
+ .outputPath(path).persistSchemaFile(true);
+
+ CarbonWriter writer = builder.buildWriterForCSVInput();
+
+ for (int i = 0; i < 10; i++) {
+ writer.write(new String[]{"robot" + (i % 10),
String.valueOf(i)});
+ }
+ writer.close();
+
+ // Read schema in data file
+ File[] dataFiles = new File(path +
"/Fact/Part0/Segment_null/").listFiles(new FilenameFilter() {
+ @Override
+ public boolean accept(File dir, String name) {
+ return name.endsWith("carbondata");
+ }
+ });
+ List<ColumnSchema> columns =
CarbonReader.readSchemaInDataFile(dataFiles[0].getAbsolutePath());
+ System.out.println("Schema:");
+ for (int i = 0; i < columns.size(); i++) {
+ System.out.println(columns.get(i).getColumnName() + " " +
columns.get(i).getDataType());
+ }
+
+ // Read data
+ CarbonReader reader = CarbonReader.builder(path, "_temp")
--- End diff --
No
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