: Spark scala filter array contains Try to use rlike("^MSL") and rlike("^HCP") instead. jpg,. I want to replace null with 0 and 1 for any other value except null. Jul 26, 2017 · Care to elaborate on "I want to filter the data from the above column as case insensitive. 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. It returns a Boolean column indicating the presence of the element in the array. So let‘s get started! Access values in array of struct spark scala Hi, I have a below sample data in the form of dataset schema ``` I am required to filter for a country value in address array, say for eg. Mapping between Spark SQL types and filter value types follow the convention for return type of org. 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. Mar 2, 2019 · I have a dataframe with a key and a column with an array of structs in a dataframe column. contains # Column. Feb 2, 2025 · Filtering an Array Using FILTER in Spark SQL The FILTER function in Spark SQL allows you to apply a condition to elements of an array column, returning only those that match the criteria. count I got :res52: Long = 0 which is obvious not right. It is commonly used in filtering operations or when analyzing the composition of array data. 3, “Choosing a Collection Method Apr 6, 2025 · Learn the syntax of the array\\_contains function of the SQL language in Databricks SQL and Databricks Runtime. AnalysisException: cannot resolve 'array_contains (v, NULL)' due to data type mismatch: Null typed values cannot be used as arguments; or Mar 18, 2024 · Scala provides very powerful Collection data structures in the standard library. 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. Apr 26, 2024 · Spark with Scala provides several built-in SQL standard array functions, also known as collection functions in DataFrame API. Jul 26, 2019 · The contains () method is utilized to check whether a certain element is present in the list or not. Both left or right must be A filter predicate for data sources. As an example, regr_count is a function that is defined here. This is Recipe 10. Aug 6, 2020 · search = search. Apr 16, 2025 · Right into the Core of Spark’s Null Handling Dealing with null values is a rite of passage in data engineering, and Apache Spark’s DataFrame API offers powerful tools to tame them, ensuring your datasets are clean and reliable. Jul 4, 2017 · scala> val rdd2 = rdd. Each row contains a column a looks something like this: May 31, 2020 · function array_contains should have been array followed by a value with same element type, but it's [array<array<string>>, string]. > df. contains(x)) rdd2: org. I want to filter a List, and I only want to keep a string if the string contains . Scala collections Scala has different types of collections: lists, sequences, and arrays. 6 I'm trying to filter a dataframe via a field "tags" that is an array of strings. Jan 25, 2018 · I have an issue , I want to check if an array of string contains string present in another column . One common task in data analysis and manipulation is filtering records based on Nov 5, 2016 · I can filter - as per below - tuples in an RDD using "contains". Apr 17, 2025 · How to Filter Rows with array_contains in an Array Column in a PySpark DataFrame: The Ultimate Guide Diving Straight into Filtering Rows with array_contains in a PySpark DataFrame Filtering rows in a PySpark DataFrame is a critical skill for data engineers and analysts working with Apache Spark in ETL pipelines, data cleaning, or analytics. 6. The book is easy to read and will help you level-up your Spark skills. But what about filtering an RDD using "does not contain" ? Dec 14, 2020 · This article shows you how to filter NULL/None values from a Spark data frame using Scala. df. spark. You can use Feb 3, 2024 · The Scala List class filter method implicitly loops over the List/Seq you supply, tests each element of the List with the function you supply. There are some structs with all null values which I would like to filter out. Row#get (int). Apr 17, 2025 · Diving Straight into Filtering Rows by Substring in a PySpark DataFrame Filtering rows in a PySpark DataFrame where a column contains a specific substring is a key technique for data engineers using Apache Spark. We’ll focus on the find, filter, and collect methods and their respective variations. 2 and Scala 2. To use IS NOT IN, use the NOT operator to negate the result of the isin () function. These come in handy when we need to perform operations on an array (ArrayType) column. Jul 30, 2009 · array array_agg array_append array_compact array_contains array_distinct array_except array_insert array_intersect array_join array_max array_min array_position array_prepend array_remove array_repeat array_size array_sort array_union arrays_overlap arrays_zip ascii asin asinh assert_true atan atan2 atanh avg base64 between bigint bin binary pyspark. Apr 20, 2023 · This is an excerpt from the 1st Edition of the Scala Cookbook (#ad) (partially modified for the internet). Nov 9, 2015 · val filteredDf = unfilteredDf. It seems in your case that you are actually dealing with DataFrames, thus the solutions mentioned above don't work. filter(array_contains($"subjects", "english")). 1 ScalaDoc - org. ; line 1 pos 45; Can someone please help ? 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. Feb 9, 2017 · Using Spark 1. In scala, Option(null) gives None, so you can do : val contains_null = udf((xs: Seq[Integer]) => xs. Understanding their syntax and parameters is key to applying them effectively. Your function must return true or false, and filter returns the list elements where your function returns true. contains(other) [source] # Contains the other element. array_contains # pyspark. google. Aug 19, 2025 · In this PySpark article, you will learn how to apply a filter on DataFrame columns of string, arrays, and struct types by using single and multiple conditions and also using isin() with PySpark (Python Spark) examples. With your decade of expertise in building scalable ETL pipelines, you’ve likely wrestled with nulls disrupting joins, aggregations, or reports. Spark 1. col ("Name"). 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. jpeg or . filter(array_contains(df("v"), null)). 17, “How to use filter to Filter a Scala Collection” Problem You want to filter the items in a collection to create a new collection that contains only the elements that match your filtering criteria. Jan 14, 2018 · I would like to filter out items that are non in the filter_list, similar to how array_contains would function, but its not working on a provided list of strings, only a single value. Sep 27, 2016 · scala> val aaa = test. 4. New in version 1. Each row of that column has an Array of String values: Values in my Spark 2. Column. functionsCommonly used functions available for DataFrame operations. The Beautiful Spark book is the best way for you to learn about the most important parts of Spark, like ArrayType columns. filter(array_contains(col("array_of_properties. show(truncate=false) 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 Spark 4. filter or DataFrame. Usage array_contains() takes two arguments: the array column and the value to check for. rdd. isEmpty)) However, if you are using Spark 2. Returns NULL if either input expression is NULL. contains("www. Collections in The rest of this blog uses Scala. I've got a dataframe with 2 columns : the first is a date, the second an array of words. Use contains function The syntax of this function is defined as: contains (left, right) - This function returns a boolean. Retuns True if right is found inside left. This guide dives Apr 30, 2017 · Here we can use the higher-order function "array_contains" which is available from spark 2. ")) However, this pulls out the url www. 10 here. Note: Even though I use a List in these examples, the filter method can be used on any Scala sequence, including Array, ArrayBuffer, List Mar 27, 2024 · Spark RDD filter is an operation that creates a new RDD by selecting the elements from the input RDD that satisfy a given predicate (or condition). 0. All these array functions accept input as an array column and several other arguments based on the function. When dealing with array columns—common in semi Using rlike in this way will also filter string like "OtherMSL", even if it does not start with the pattern you said. png: 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 Jan 31, 2023 · In Apache Spark, you can use the where() function to filter rows in a DataFrame based on an array column. Mar 21, 2024 · PySpark, the Python API for Apache Spark, provides powerful capabilities for processing large-scale datasets. co. Mar 9, 2016 · This question has been answered but for future reference, I would like to mention that, in the context of this question, the where and filter methods in Dataset/Dataframe supports two syntaxes: The SQL string parameters: Dec 1, 2017 · I have a Dataframe with one column. It also explains how to filter DataFrames with array columns (i. filter(($"referrer"). The new Spark functions make it easy to process array columns with native Spark. To achieve this, you can combine array_contains with PySpark's filtering capabilities, such as filter or where. For example with the following dataframe: +—————+———————————— Jul 9, 2022 · Spark SQL functions contains and instr can be used to check if a string contains a string. 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? Thanks Dean Apr 22, 2024 · Apache Spark provides a rich set of functions for filtering array columns, enabling efficient data manipulation and exploration. This function can be applied to create a new boolean column or to filter rows in a DataFrame. exists(e => Option(e). Spark developers previously needed to use UDFs to perform complicated array functions. 5 dataframe with elasticsearch, I am try to filter id from a column that contains a list (array) of ids. Upvoting indicates when questions and answers are useful. You can use the array_contains() function to check if a specific value exists in an array Jul 30, 2009 · array array_agg array_append array_compact array_contains array_distinct array_except array_insert array_intersect array_join array_max array_min array_position array_prepend array_remove array_repeat array_size array_sort array_union arrays_overlap arrays_zip ascii asin asinh assert_true atan atan2 atanh avg base64 between bigint bin binary 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. Filtering values from an ArrayType column and filtering DataFrame rows are completely different operations of course. reduce the number of rows in a DataFrame). Otherwise, returns False. 5. Oct 12, 2023 · This tutorial explains how to use a case-insensitive "contains" in PySpark, including an example. In this article, we shall discuss the syntax of Spark RDD Filter and different patterns to apply it. If you want to get the count 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. Returns a boolean Column based on a string match. expr("_FUNC_()"). Mar 26, 2021 · You can rewrite your UDF to use Option. apache. Canada and then create a new column "isPresent" to set as True if Canada is present and set False if Canada is not present in that particular row. array_contains() The array_contains() function is used to determine if an array column in a DataFrame contains a specific value. I am currently using below code which is giving an error. functions. mydomain. "? 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? Mar 27, 2024 · In Spark isin () function is used to check if the DataFrame column value exists in a list/array of values. Function DataFrame. Solution As listed in Recipe 10. 5 and Scala 2. The Scala collections library provides various methods/functions to process and manipulate data in our collection. One common use case for array_contains is filtering data based on the presence of a specific value in an array column. This allows you to efficiently extract the desired subset of data that meets your criteria. filter (F. Whether you're searching for names containing a certain pattern, identifying records with specific keywords, or refining datasets for analysis, this operation enables targeted data New Spark 3 Array Functions (exists, forall, transform, aggregate, zip_with) Spark 3 has new array functions that make working with ArrayType columns much easier. 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. filter(x => !f. 2 Dataframe. 10. Using functions defined here provides a little bit more compile-time safety to make sure the function exists. 4+, it is more suitable to use Spark built-in functions for this. You can use array_contains () function either to derive a new boolean column or filter the DataFrame. not (F. 5. sql. What's reputation and how do I get it? Instead, you can save this post to reference later. The code I can figure out is: Sep 28, 2021 · I have a col in a dataframe which is an array of structs. We‘ll cover simple examples through to complex use cases for unlocking the power of array data in your PySpark workflows. name"), "somename")) How do I add AND filters on values of two keys in the nested props map (for example a key name is_enabled with a boolean value of true or false, and a key name of source with a string value of test) ? Filtering PySpark Arrays and DataFrame Array Columns This post explains how to filter values from a PySpark array column. I want to filter the spark dataframe column with an array of strings. 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. Master the Spark DataFrame filter operation with this detailed guide Learn syntax parameters and advanced techniques for efficient data processing in Scala Nov 3, 2023 · This comprehensive guide will walk through array_contains () usage for filtering, performance tuning, limitations, scalability, and even dive into the internals behind array matching in Spark SQL. Oct 12, 2023 · This tutorial explains how to filter rows in a PySpark DataFrame that do not contain a specific string, including an example. It returns null if the array itself is null, true if the element exists, and false otherwise. To check if an array column contains null elements, use exists as suggested by @mck's answer. Looking for all rows that have the tag 'private'. For example the mapping of elasticsearch column is looks like this pyspark. where can be used to filter out null values. In this article, we provide an overview of various filtering Feb 25, 2016 · I am using apache spark 1. uk search url that also contains my web domain for some reason. Spark provides several functions to check if a value exists in a list, primarily isin and array_contains, along with SQL expressions and custom approaches. You can call the functions defined here by two ways: _FUNC_() and functions. May 17, 2018 · I'm a beginner with Scala. What is the right way to get it? One more question, I want to replace the values in the friend_id field. The filter operation does not modify the original RDD but creates a new RDD with the filtered elements. RDD[Int] = MapPartitionsRDD[3] at filter at <console>:28 Nevertheless, I still believe this is an overkill since you are already using spark-sql. created_at:string words:array element:string I wish to keep only words beg Sep 5, 2019 · I have a data frame with following schema My requirement is to filter the rows that matches given field like city in any of the address array elements. show() org. filter("friend_id is null") scala> aaa. I can access individual fields like loyaltyMe Spark (Scala) filter array of structs without explodeI have a dataframe with a key and a column with an array Feb 21, 2018 · You'll need to complete a few actions and gain 15 reputation points before being able to upvote. It can also be used to filter data. Dec 21, 2021 · dataframe. In this tutorial, we’ll explore different techniques to filter elements from a collection. e.

Spark scala filter array contains. Jul 4, 2017 · scala> val rdd2 = rdd.