Github user chenerlu commented on a diff in the pull request:
https://github.com/apache/incubator-carbondata/pull/850#discussion_r113447813
--- Diff:
examples/spark2/src/main/scala/org/apache/carbondata/examples/AlterTableExample.scala
---
@@ -0,0 +1,103 @@
+/*
+ * 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.examples
+
+import java.io.File
+
+import org.apache.carbondata.core.constants.CarbonCommonConstants
+import org.apache.carbondata.core.util.CarbonProperties
+import org.apache.spark.sql.CarbonSession._
+import org.apache.spark.sql.SparkSession
+
+/**
+ * Created by erlu on 2017/4/25.
+ */
+object AlterTableExample {
+
+ def main(args: Array[String]): Unit = {
+
+ val rootPath = new File(this.getClass.getResource("/").getPath
+ + "../../../..").getCanonicalPath
+
+ val storeLocation = s"$rootPath/examples/spark2/target/store"
+ val warehouse = s"$rootPath/examples/spark2/target/warehouse"
+ val metastoredb = s"$rootPath/examples/spark2/target/metastore_db"
+
+
CarbonProperties.getInstance().addProperty(CarbonCommonConstants.CARBON_TIMESTAMP_FORMAT,
"yyyy/MM/dd")
+
+ val spark = SparkSession
+ .builder()
+ .master("local")
+ .appName("AlterTableExample")
+ .config("spark.sql.warehouse.dir", warehouse)
+ .getOrCreateCarbonSession(storeLocation, metastoredb)
+
+ spark.sparkContext.setLogLevel("INFO")
+
+ spark.sql("DROP TABLE IF EXISTS carbon_table")
+ spark.sql("DROP TABLE IF EXISTS new_carbon_table")
+
+ spark.sql(
+ s"""
+ | CREATE TABLE carbon_table(
+ | shortField short,
+ | intField int,
+ | bigintField long,
+ | doubleField double,
+ | stringField string,
+ | timestampField timestamp,
+ | decimalField decimal(18,2),
+ | dateField date,
+ | charField char(5),
+ | floatField float,
+ | complexData array<string>
+ | )
+ | STORED BY 'carbondata'
+ | TBLPROPERTIES('DICTIONARY_INCLUDE'='dateField, charField')
+ """.stripMargin)
+
+ // Alter table change data type
+ spark.sql("DESCRIBE FORMATTED carbon_table").show()
+ spark.sql("ALTER TABLE carbon_table CHANGE intField intField
bigint").show()
--- End diff --
This is Alter table change data type grammar
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