load save in spark

0 votes

1) load command will load only parquet 

val a = spark.read.load("employee.parquet")--works fine
val a=spark.read.load("employee.txt")--error

2)val a =spark.read.format("csv").load("employee.txt")--works fine

3)what is the difference between 1 and 2 point loading text as data 

4)except parquet file remaining format are not accepting the below stmt 

val a = spark.read.load("text/csv/json") 

5) what is the difference of this two stmts 

val a =spark.read.json()
val a =spark.read.format("json").load("a.json")
Jul 5, 2019 in Apache Spark by Esha
1,511 views

1 answer to this question.

0 votes

The reason why you are able to load employee.parquet and not employee.txt using load in spark.read.load by default it assumes that data source is in parquet format so it is able to load it but we can use format function which can be used to specify the different format and use the load function to load the data 

spark.read.json()

Spark SQL can automatically infer the schema of a JSON dataset and load it as a Dataset[Row]. This conversion can be done by spark.read.json()

Both spark.read.json() and spark.read.format("json").load("a.json") are same as you can see in the below screenshot,

image

image

answered Jul 5, 2019 by Firoz

Related Questions In Apache Spark

0 votes
1 answer

How to save RDD in Apache Spark?

Hey, There are few methods provided by the ...READ MORE

answered Jul 23, 2019 in Apache Spark by Gitika
• 65,890 points
3,555 views
0 votes
1 answer

How do you load this multiline data in spark as a single record?

Hi@Ruben, I think you can add an escape ...READ MORE

answered Nov 23, 2020 in Apache Spark by MD
• 95,460 points
2,127 views
0 votes
1 answer

Changing Column position in spark dataframe

Yes, you can reorder the dataframe elements. You need ...READ MORE

answered Apr 19, 2018 in Apache Spark by Ashish
• 2,650 points
13,623 views
0 votes
1 answer

Efficient way to read specific columns from parquet file in spark

As parquet is a column based storage ...READ MORE

answered Apr 20, 2018 in Apache Spark by kurt_cobain
• 9,390 points
7,708 views
+1 vote
2 answers
+1 vote
1 answer

Hadoop Mapreduce word count Program

Firstly you need to understand the concept ...READ MORE

answered Mar 16, 2018 in Data Analytics by nitinrawat895
• 11,380 points
10,908 views
0 votes
1 answer

hadoop.mapred vs hadoop.mapreduce?

org.apache.hadoop.mapred is the Old API  org.apache.hadoop.mapreduce is the ...READ MORE

answered Mar 16, 2018 in Data Analytics by nitinrawat895
• 11,380 points
2,439 views
+2 votes
11 answers

hadoop fs -put command?

Hi, You can create one directory in HDFS ...READ MORE

answered Mar 16, 2018 in Big Data Hadoop by nitinrawat895
• 11,380 points
108,203 views
0 votes
1 answer

load/save text file in spark

The reason you are able to load ...READ MORE

answered Jul 22, 2019 in Apache Spark by Giri
3,356 views
0 votes
1 answer

Load custom delimited file in Spark

Refer to the following code: val sqlContext = ...READ MORE

answered Jul 24, 2019 in Apache Spark by Ritu
1,864 views
webinar REGISTER FOR FREE WEBINAR X
REGISTER NOW
webinar_success Thank you for registering Join Edureka Meetup community for 100+ Free Webinars each month JOIN MEETUP GROUP