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Apr 07, 2021; 5:11am
URL: http://apache-carbondata-dev-mailing-list-archive.168.s1.nabble.com/GitHub-carbondata-ShreelekhyaG-opened-a-new-pull-request-4113-WIP-Describe-complex-columns-tp107265p107421.html
ShreelekhyaG commented on a change in pull request #4113:
URL:
https://github.com/apache/carbondata/pull/4113#discussion_r608343891##########
File path: integration/spark/src/main/scala/org/apache/spark/sql/parser/CarbonSparkSqlParserUtil.scala
##########
@@ -744,6 +747,52 @@ object CarbonSparkSqlParserUtil {
CarbonAlterTableAddColumnCommand(alterTableAddColumnsModel)
}
+
+ def describeColumn(
+ databaseNameOp: Option[String],
+ tableName: String,
+ inputFields: java.util.List[String]
+ ): CarbonDescribeColumnCommand = {
+ val sparkSession = SparkSQLUtil.getSparkSession
+ validateTableExists(databaseNameOp, tableName, sparkSession)
+ val relation = CarbonEnv
+ .getInstance(sparkSession)
+ .carbonMetaStore
+ .lookupRelation(databaseNameOp, tableName)(sparkSession)
+ .asInstanceOf[CarbonRelation]
+ val tableSchema = StructType.fromAttributes(relation.output)
+ val carbonTable = relation.carbonTable
+ val inputColumn = tableSchema.find(_.name.equalsIgnoreCase(inputFields.get(0)))
+ if (!inputColumn.isDefined) {
+ throw new MalformedCarbonCommandException(
+ s"${inputFields.get(0)} not present in schema of table: $tableName")
+ }
+ CarbonDescribeColumnCommand(
+ carbonTable,
+ inputFields,
+ inputColumn.get
+ )
+ }
+
+ def describeShort(
+ databaseNameOp: Option[String],
+ tableName: String
+ ): CarbonDescribeShortCommand = {
+ val sparkSession = SparkSQLUtil.getSparkSession
+ validateTableExists(databaseNameOp, tableName, sparkSession)
Review comment:
done
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