Filters in HBase

0 votes
What are the different types of filters available on Hbase?
Jul 31, 2018 in Database by Data_Nerd
• 2,390 points
6,237 views

1 answer to this question.

0 votes
  • ColumnPrefixFilter: takes a single argument, a column prefix. It returns only those key-values present in a column that starts with the specified column prefix.
  • TimestampsFilter: takes a list of timestamps. It returns those key-values whose timestamps match any of the specified timestamps.
  • PageFilter: takes one argument, a page size. It returns page size, number of rows from the table.
  • MultipleColumnPrefixFilter: takes a list of column prefixes. It returns key-values that are present in a column that starts with any of the specified column prefixes.
  • ColumnPaginationFilter: takes two arguments, a limit and an offset. It returns limit number of columns after offset number of columns. It does this for all the rows.
  • SingleColumnValueFilter: takes a column family, a qualifier, a comparison operator and a comparator. If the specified column is not found, all the columns of that row will be emitted. If the column is found and the comparison with the comparator returns true, all the columns of the row will be emitted.
  • RowFilter: takes a comparison operator and a comparator. It compares each row key with the comparator using the comparison operator and if the comparison returns true, it returns all the key-values in that row.
  • QualifierFilter: takes a comparison operator and a comparator. It compares each qualifier name with the comparator using the comparison operator and if the comparison returns true, it returns all the key-values in that column.
  • ColumnRangeFilter: takes either minColumn, maxColumn, or both. Returns only those keys with columns that are between minColumn and maxColumn. It also takes two boolean variables to indicate whether to include the minColumn and maxColumn or not. If you don’t want to set the minColumn or the maxColumn, you can pass in an empty argument.
  • ValueFilter: takes a comparison operator and a comparator. It compares each value with the comparator using the compare operator and if the comparison returns true, it returns that key-value.
  • PrefixFilter: takes a single argument, a prefix of a row key. It returns only those key-values present in a row that start with the specified row prefix.
  • FirstKeyOnlyFilter: takes no arguments. Returns the key portion of the first key-value pair.
  • KeyOnlyFilter: takes no arguments. Returns the key portion of each key-value pair.
answered Jul 31, 2018 by kurt_cobain
• 9,390 points

Related Questions In Database

0 votes
1 answer

Connection in Hbase

Following code is used to open a ...READ MORE

answered Jul 11, 2018 in Database by Data_Nerd
• 2,390 points
454 views
0 votes
1 answer

HLog and WAL in Hbase.

All edits in the HStore are stored ...READ MORE

answered Jul 16, 2018 in Database by Data_Nerd
• 2,390 points
3,534 views
0 votes
1 answer

Data model operations in Hbase

1. Get(returns attributes for a specified row, Gets ...READ MORE

answered Jul 16, 2018 in Database by Data_Nerd
• 2,390 points
551 views
0 votes
1 answer

Thrift in Hbase

Apache Thrift is written in C++ but ...READ MORE

answered Aug 9, 2018 in Database by kurt_cobain
• 9,390 points
645 views
0 votes
1 answer
+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
10,523 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
2,166 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
103,819 views
0 votes
1 answer

Standalone Mode in Hbase

It is a default mode of HBase. ...READ MORE

answered Jul 11, 2018 in Database by kurt_cobain
• 9,390 points
1,253 views
0 votes
1 answer

Delete row in HBase

In Hbase, whatever you write will be ...READ MORE

answered Jul 24, 2018 in Database by kurt_cobain
• 9,390 points
1,520 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