: Spark scala contains Master string manipulation in Spark DataFrames with this detailed guide Learn functions parameters and advanced techniques for text processing in Scala Mar 28, 2018 · How to filter a row if the value contains in list in scala spark? Asked 7 years, 8 months ago Modified 7 years, 8 months ago Viewed 10k times Aug 15, 2023 · Explore how to use the powerful 'when' function in Spark Scala for conditional logic and data transformation in your ETL pipelines. escapedStringLiterals' that can be used to fallback to the Spark 1. filter(x => !f. Features of Apache Spark In-memory computation Distributed processing using Mar 26, 2021 · You can rewrite your UDF to use Option. implicits. This function can be applied to create a new boolean column or to filter rows in a DataFrame. Is there a way, using scala in spark, that I can filter out anything with google in it while keeping the correct results I have? A filter that evaluates to true iff the attribute evaluates to a string that contains the string value. Aug 6, 2020 · search = search. Use regex expression with rlike () to filter rows by checking case insensitive (ignore case) and to filter rows that have only numeric/digits and more examples. filter (F. Mar 27, 2024 · Like ANSI SQL, in Spark also you can use LIKE Operator by creating a SQL view on DataFrame, below example filter table rows where name column contains rose string. Jun 16, 2022 · How to Search String in Spark DataFrame? - Scala and PySpark, Contains () function, like function, rlike function, filter dataframe column value Oct 12, 2023 · By default, the contains function in PySpark is case-sensitive. May 11, 2017 · How can I filter A so that I keep all the rows whose browse contains any of the the values of browsenodeid from B? In terms of the above examples the result will be: I want to filter a List, and I only want to keep a string if the string contains . Can anyone know how to develop this logic in spark scala SQL or using spark scala functions of dataframe. Returns NULL if either input expression is NULL. If no values it will contain only one and it will be the null value Important: note the column will not be null but an Spark SQL, DataFrames and Datasets Guide Spark SQL is a Spark module for structured data processing. The Beautiful Spark book is the best way for you to learn about the most important parts of Spark, like ArrayType columns. filter or DataFrame. You can use a boolean value on top of this to get a True/False boolean value. Nov 5, 2025 · In Spark & PySpark, contains () function is used to match a column value contains in a literal string (matches on part of the string), this is mostly used to filter rows on DataFrame. contains() function works in conjunction with the filter() operation and provides an effective way to select rows based on substring presence within a string column. 1 Linear Supertypes Serializable, Serializable, Product, Equals, Filter, AnyRef, Any Ordering Alphabetic By Inheritance Inherited StringContains Serializable Serializable Product Equals StringContains in the Apache Spark Scala API is a powerful, efficient tool for substring matching in large datasets. spark. Return Type: It Mar 27, 2024 · Spark DataFrame API doesn’t have a function to check value not exists in a list of values however you can use NOT operator (!) in conjunction with isin () function to negate the result. In scala, Option(null) gives None, so you can do : val contains_null = udf((xs: Seq[Integer]) => xs. Both left or right must be Apr 16, 2025 · Straight to the Heart of Spark’s like Operation Filtering data with pattern matching is a key skill in analytics, and Apache Spark’s like operation in the DataFrame API is your go-to tool for finding rows based on string patterns. Mar 10, 2016 · When I create a DataFrame from a JSON file in Spark SQL, how can I tell if a given column exists before calling . Feb 11, 2012 · The org. The condition is specified as a string that Jun 11, 2016 · How would i filter by list. col ("Name"). With your ETL and optimization expertise, these techniques should slide right into your pipelines, enhancing reliability and performance. The rest of this blog uses Scala. Jul 26, 2019 · The contains () method is utilized to check whether a certain element is present in the list or not. select Example JSON schema: Aug 21, 2025 · The PySpark array_contains() function is a SQL collection function that returns a boolean value indicating if an array-type column contains a specified element. Mar 16, 2022 · scala apache-spark apache-spark-sql edited Mar 16, 2022 at 9:45 asked Mar 16, 2022 at 9:06 Jelly 1,43452859 2 How can I use Spark SQL filter as a case insensitive filter? For example: Dec 14, 2020 · This article shows you how to filter NULL/None values from a Spark data frame using Scala. I want to replace null with 0 and 1 for any other value except null. It checks whether the stated map contains a binding for a key or not. Licensed by Brendan O’Connor under a CC-BY-SA 3. pyspark. uk search url that also contains my web domain for some reason. RDD[Int] = MapPartitionsRDD[3] at filter at <console>:28 Nevertheless, I still believe this is an overkill since you are already using spark-sql. What is the right way to get it? One more question, I want to replace the values in the friend_id field. Function DataFrame. It returns a Boolean column indicating the presence of the element in the array. Usage array_contains() takes two arguments: the array column and the value to check for. I have used function such as like, rlike, contains but it is not giving me the output which I want. Scala collections Scala has different types of collections: lists, sequences, and arrays. 3. Jul 30, 2009 · For example, to match "\abc", a regular expression for regexp can be "^\abc$". If any part of the names contains dots, it is quoted to avoid confusion. contains() ? This is my current code, I have a Main class that gets input from command line arguments and according to that input executes the corresponding dispatcher. 0 license. I need to check if a string is present in a list, and call a function which accepts a boolean accordingly. However, you can use the following syntax to use a case-insensitive “contains” to filter a DataFrame where rows contain a specific string, regardless of case: Nov 29, 2015 · As a simplified example, I tried to filter a Spark DataFrame with following code: Master checking if a value exists in a list in Spark DataFrames with this detailed guide Learn functions parameters and advanced techniques in Scala Mar 27, 2024 · Similar to SQL regexp_like() function Spark & PySpark also supports Regex (Regular expression matching) by using rlike() function, This function is available in org. Annotations @Stable() Source filters. regex_pattern Specifies a regular expression search pattern to be searched by the RLIKE or REGEXP clause Apr 16, 2025 · Null handling in Spark’s DataFrame API is a critical skill, and Scala’s tools—from isNull to na. count I got :res52: Long = 0 which is obvious not right. 6 behavior regarding string literal parsing. isEmpty)) However, if you are using Spark 2. array_contains(col, value) [source] # Collection function: This function returns a boolean indicating whether the array contains the given value, returning null if the array is null, true if the array contains the given value, and false otherwise. May 28, 2019 · The contains () method of Scala is equivalent to the isDefinedAt method of Scala but the only difference is that isDefinedAt is observed on all the PartialFunction classes while contains is clearly defined to the Map interface of Scala. The default escape character is \. It is commonly used in filtering operations or when analyzing the composition of array data. withColumn ("new_telnum", when (expr ("substring (telnum,1,2)") === "91" || array_contains() The array_contains() function is used to determine if an array column in a DataFrame contains a specific value. Master string manipulation in Spark DataFrames with this detailed guide Learn functions parameters and advanced techniques for text processing in Scala Aug 19, 2025 · PySpark SQL contains () function is used to match a column value contains in a literal string (matches on part of the string), this is mostly used to filter rows on DataFrame. The book is easy to read and will help you level-up your Spark skills. contains(x)) rdd2: org. Column has the contains function that you can use to do string style contains operation between 2 columns containing String. I'm relatively new to scala but my guess is exists () is iterating over all keys (or key,value tupple) whereas contains uses Map's random access pyspark. contains(other) [source] # Contains the other element. jpg,. Categorize, extract, and manipulate data based on conditions and use otherwise for smart fallthrough logic. Retuns True if right is found inside left. The code I can figure out is: Advanced String Matching with Spark's rlike Method The Spark rlike method allows you to write powerful string matching algorithms with regular expressions (regexp). Examples explained in this Spark tutorial are with Scala, and the same is also explained with PySpark Tutorial (Spark with Python) Examples. May 13, 2012 · 6 Per answers above, note that exists () is significantly slower than contains () (I've benchmarked with a Map containing 5000 string keys, and the ratio was a consistent x100). Returns a boolean Column based on a string match. contains # Column. . May 7, 2025 · I have the following working statement for a DS and DF: val ds2 = ds. Dec 16, 2022 · Scala + Spark: filter a dataset if it contains elements from a list Asked 2 years, 3 months ago Modified 2 years, 3 months ago Viewed 2k times I have a dataframe with a column of arraytype that can contain integer values. This blog post will outline tactics to detect strings that match multiple different patterns and how to abstract these regular expression patterns to CSV files. jpeg or . contains API. Otherwise, returns False. With your decade of data engineering expertise and a passion for scalable ETL pipelines, you’re well-versed in sifting through messy datasets, and like is a of the column to be evaluated; dots are used as separators for nested columns. Filter spark DataFrame on string contains Asked 9 years, 9 months ago Modified 6 years, 2 months ago Viewed 200k times Jul 9, 2022 · Spark SQL functions contains and instr can be used to check if a string contains a string. It seems in your case that you are actually dealing with DataFrames, thus the solutions mentioned above don't work. Sequences represent ordered collections of elements, where each element has a specific position accessible by an index. Example #1: Oct 12, 2023 · This tutorial explains how to filter a PySpark DataFrame for rows that contain a specific string, including an example. The Seq trait in Scala provides a Jul 26, 2017 · Care to elaborate on "I want to filter the data from the above column as case insensitive. Method Definition: def contains(key: K): Boolean Where, k is the key. With array_contains, you can easily determine whether a specific element is present in an array column, providing a Jan 31, 2023 · Photo by Bruno Wolff on Unsplash Description In Apache Spark, the where() function can be used to filter rows in a DataFrame based on a given condition. Python also supports Pandas which also contains Data Frame but this is not distributed. You can use array_contains () function either to derive a new boolean column or filter the DataFrame. For example, if the config is enabled, the regexp that can match "\abc" is "^\abc$". It can also be used to filter data. not (F. functions. _ to use the $ column selector. where can be used to filter out null values. scala Since 1. fill —empower you to clean data with precision. parser. co. Writing Beautiful Spark Code is the best way to learn how to use Oct 12, 2023 · This tutorial explains how to filter rows in a PySpark DataFrame that do not contain a specific string, including an example. Apr 26, 2024 · Spark with Scala provides several built-in SQL standard array functions, also known as collection functions in DataFrame API. Jul 4, 2017 · scala> val rdd2 = rdd. Please help me Mastering Sequences in Scala: A Comprehensive Guide Scala’s collections framework is a cornerstone of its expressive and type-safe programming model, and sequences (Seq) are among the most fundamental and widely used collection types. esc_char Specifies the escape character. apache. The compare operator to check if two columns are equal is ===, not ==. Apr 9, 2024 · Spark array_contains() is an SQL Array function that is used to check if an element value is present in an array type (ArrayType) column on DataFrame. array_contains # pyspark. SparklyR – R interface for Spark. Aug 1, 2017 · I'm pretty new to scala and spark and I've been trying to find a solution for this issue all day - it's doing my head in. google. "? Do you want to search words in words column (that seems to be of array type)? Why not to use col1 instead since it's already available? Sep 3, 2021 · The PySpark recommended way of finding if a DataFrame contains a particular value is to use pyspak. Thanks to Brendan O’Connor, this cheatsheet aims to be a quick reference of Scala syntactic constructions. To check if an array column contains null elements, use exists as suggested by @mck's answer. Apr 18, 2024 · Learn the syntax of the contains function of the SQL language in Databricks SQL and Databricks Runtime. exists(e => Option(e). If you want to get the count Parameters search_pattern Specifies a string pattern to be searched by the LIKE clause. Sep 27, 2016 · scala> val aaa = test. contains ("ABC")) Both methods fail due to syntax error could you please help me filter rows that does not contain a certain string in pyspark. These come in handy when we need to perform operations on an array (ArrayType) column. It’s straightforward to implement and integrates seamlessly into your data pipelines, making it an excellent choice for data engineering and data science tasks. Method Definition: def contains (elem: Any): Boolean Return Type: It returns true if the element present in the contains method as argument is also present in the stated list else it returns false. filter("friend_id is null") scala> aaa. sql. Use contains function The syntax of this function is defined as: contains (left, right) - This function returns a boolean. Column. It returns null if the array itself is null, true if the element exists, and false otherwise. I've tried 20 different variations of the following code and keep getting t Jan 25, 2018 · How to use array_contains with 2 columns in spark scala? Asked 7 years, 10 months ago Modified 4 years, 5 months ago Viewed 14k times Mar 27, 2024 · You can get all columns of a DataFrame as an Array [String] by using columns attribute of Spark DataFrame and use this with Scala Array functions to check if a column/field present in DataFrame, In this article I will also cover how to check if a column present/exists in nested column and by case insensitive. param: attribute of the column to be evaluated; dots are used as separators for nested columns. And remember, you need to import the spark implicits import spark. For your example: Jan 22, 2025 · Spark Scala provides a robust platform for performing text replacement tasks efficiently, leveraging its speed and built-in capabilities to process large datasets effectively. I Feb 18, 2021 · Dataframe-2: Output Which I want: I am using spark scala here. There is a SQL config 'spark. 4+, it is more suitable to use Spark built-in functions for this. rdd. All these array functions accept input as an array column and several other arguments based on the function. Unlike the basic Spark RDD API, the interfaces provided by Spark SQL provide Spark with more information about the structure of both the data and the computation being performed. png: Jul 31, 2018 · Ok, I guess I know what's happening. _ matches exactly one character. Introduction to array_contains function The array_contains function in PySpark is a powerful tool that allows you to check if a specified value exists within an array column. It can contain special pattern-matching characters: % matches zero or more characters. Is it possible to achieve this with a one liner? The code below is the best I could get: Nov 9, 2015 · However, this pulls out the url www. This function is particularly useful when dealing with complex data structures and nested arrays. Aug 7, 2017 · The most succinct way to do this is to use the array_contains spark sql expression as shown below, that said I've compared the performance of this with the performance of doing an explode and join as shown in a previous answer and the explode seems more performant. I want an exact word match from dataframe-2 in dataframe-1. Column class.

Spark scala contains. Retuns True if right is found inside left.