org.apache.hadoop.hive.ql.io

Class SchemaInferenceUtils

java.lang.Object

org.apache.hadoop.hive.ql.io.SchemaInferenceUtils

public class SchemaInferenceUtils
extends Object

Constructor Summary

Constructors

Constructor and Description
SchemaInferenceUtils()

Method Summary

Modifier and Type	Method and Description
static boolean	doesSupportSchemaInference(org.apache.hadoop.conf.Configuration conf, String fileFormat) Determines if a supplied fileFormat supports Schema Inference for CREATE TABLE LIKE FILE.
static List<org.apache.hadoop.hive.metastore.api.FieldSchema>	readSchemaFromFile(org.apache.hadoop.conf.Configuration conf, String fileFormat, String filePath) Returns a List containing FieldSchema as determined by the readSchema method of the provided file format.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

SchemaInferenceUtils

public SchemaInferenceUtils()

Method Detail

doesSupportSchemaInference

public static boolean doesSupportSchemaInference(org.apache.hadoop.conf.Configuration conf,
                                                 String fileFormat)
                                          throws HiveException

Determines if a supplied fileFormat supports Schema Inference for CREATE TABLE LIKE FILE.

Parameters:

conf - Configuration object used to get class.

fileFormat - File format to check for Schema Inference support.

Throws:

HiveException - if unable to get SerDe class for fileFormat

readSchemaFromFile

public static List<org.apache.hadoop.hive.metastore.api.FieldSchema> readSchemaFromFile(org.apache.hadoop.conf.Configuration conf,
                                                                                        String fileFormat,
                                                                                        String filePath)
                                                                                 throws HiveException

Returns a List containing FieldSchema as determined by the readSchema method of the provided file format.

Parameters:

conf - Hadoop Configuration object used to look up class and provided to the readSchema method.

fileFormat - File format in which to use SerDe from.

filePath - Path to the file to read.

Throws:

HiveException - if unable to read the schema