The comprehensive list of Spark functions provided in the Apache Spark API documentation can be a bit difficult to navigate. In this post we breakdown the Apache Spark built-in functions by Category: Operators, String functions, Number functions, Date functions, Array functions, Conversion functions and Regex functions.

Hopefully this will simplify the learning process and serve as a better reference article for Spark SQL functions.

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January 18, Spark API. Spark SQL Operators. Logical NOT. Returs the bitwise AND of two or more expressions. Logical AND. Returs the bitwise OR of two or more expressions. Logical OR. Returns the bitwise exclusive OR of two or more expressions. Returns the bitwise NOT of two or more expressions.

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## Spark SQL Functions – Listed by Category

I am working from the example on the repository page. This following code works well.

**Apache Spark 2 - Spark SQL – Analytics Functions or Windowing Functions**

But what if I needed to see if the doctor string contains a substring? Since we are writing our expression inside of a string. What do I do to do a "contains"? Learn more. Filter spark DataFrame on string contains Ask Question.

Stop youtube autoplay chromeAsked 4 years, 1 month ago. Active 7 months ago. Viewed k times. Active Oldest Votes. You can use contains this works with an arbitrary sequence : df. I imported import org. You can replace it with df "foo" or org. Jay Jay 45 5 5 bronze badges. Sign up or log in Sign up using Google.

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P034062Feedback on Q2 Community Roadmap.It always performs floating point division. The value of percentage must be between 0. The accuracy parameter default: is a positive numeric literal which controls approximation accuracy at the cost of memory.

Zz top stagesHigher value of accuracy yields better accuracy, 1. When percentage is an array, each value of the percentage array must be between 0. In this case, returns the approximate percentile array of column col at the given percentage array. The length of string data includes the trailing spaces.

The length of binary data includes binary zeros. The result is an array of bytes, which can be deserialized to a CountMinSketch before usage.

Count-min sketch is a probabilistic data structure used for cardinality estimation using sub-linear space. The result is one plus the previously assigned rank value.

Otherwise, null. Returns 0, if the string was not found or if the given string str contains a comma. If isIgnoreNull is true, returns only non-null values.

If expr2 is 0, the result has no decimal point or fractional part. All other letters are in lowercase. Words are delimited by white space.

All the input parameters and output column types are string.

The default value of offset is 1 and the default value of default is null. If the value of input at the offset th row is null, null is returned. If there is no such offset row e.Object org. Computes the cosine inverse of the given value; the returned angle is in the range 0.

Computes the cosine inverse of the given column; the returned angle is in the range 0. Computes the numeric value of the first character of the string column, and returns the result as an int column.

How to check sha256 of a fileReturns the angle theta from the conversion of rectangular coordinates x, y to polar coordinates r, theta. Computes the BASE64 encoding of a binary column and returns it as a string column. An expression that returns the string representation of the binary value of the given long column. Returns a Column based on the given column name. Concatenates multiple input string columns together into a single string column, using the given separator.

Calculates the cyclic redundancy check value CRC32 of a binary column and returns the value as a bigint. Window function: returns the cumulative distribution of values within a window partition, i. Window function: returns the rank of rows within a window partition, without any gaps.

Parses the expression string into the column that it represents, similar to DataFrame.

Formats numeric column x to a format like '. Converts the number of seconds from unix epoch UTC to a string representing the timestamp of that moment in the current system time zone in the given format. Extracts json object from a json string based on json path specified, and returns json string of the extracted json object. Aggregate function: indicates whether a specified column in a GROUP BY list is aggregated or not, returns 1 for aggregated or 0 for not aggregated in the result set.

Calculates the hash code of given columns, and returns the result as an int column. Returns a new string column by converting the first letter of each word to uppercase. Locate the position of the first occurrence of substr column in the given string.Send us feedback. It always performs floating point division.

The final state is converted into the final result by applying a finish function. The value of percentage must be between 0. The accuracy parameter default: is a positive numeric literal which controls approximation accuracy at the cost of memory.

Higher value of accuracy yields better accuracy, 1. When percentage is an array, each value of the percentage array must be between 0. In this case, returns the approximate percentile array of column col at the given percentage array.

If no value is set for nullReplacement, any null value is filtered. The elements of the input array must be orderable. Null elements will be placed at the end of the returned array. If the arrays have no common element and they are both non-empty and either of them contains a null element null is returned, false otherwise. The function returns -1 if its input is null and spark.

If spark. By default, the spark. The length of string data includes the trailing spaces. The length of binary data includes binary zeros. The result is an array of bytes, which can be deserialized to a CountMinSketch before usage. Count-min sketch is a probabilistic data structure used for cardinality estimation using sub-linear space. The result is one plus the previously assigned rank value. Returns NULL if the index exceeds the length of the array. Otherwise, null.

Returns 0, if the string was not found or if the given string str contains a comma. If isIgnoreNull is true, returns only non-null values. If expr2 is 0, the result has no decimal point or fractional part. All other letters are in lowercase. Words are delimited by white space. All the input parameters and output column types are string. The default value of offset is 1 and the default value of default is null. If the value of input at the offset th row is null, null is returned.

If there is no such offset row e. If there is no such an offset row e. The pattern is a string which is matched literally, with exception to the following special symbols:. If an escape character precedes a special symbol or another escape character, the following character is matched literally. It is invalid to escape any other character. Since Spark 2. The given pos and return value are 1-based. If str is longer than lenthe return value is shortened to len characters. All elements in keys should not be null.Object org.

Computes the cosine inverse of the given value; the returned angle is in the range 0. Computes the cosine inverse of the given column; the returned angle is in the range 0. Computes the numeric value of the first character of the string column, and returns the result as a int column.

Returns the angle theta from the conversion of rectangular coordinates x, y to polar coordinates r, theta. Computes the BASE64 encoding of a binary column and returns it as a string column. An expression that returns the string representation of the binary value of the given long column.

As of 1. This will be removed in Spark 2. Returns a Column based on the given column name. Concatenates multiple input string columns together into a single string column, using the given separator. Calculates the cyclic redundancy check value CRC32 of a binary column and returns the value as a bigint. Window function: returns the cumulative distribution of values within a window partition, i.

Window function: returns the rank of rows within a window partition, without any gaps. Parses the expression string into the column that it represents, similar to DataFrame.

Formats numeric column x to a format like '.

Most accurate bracketologyConverts the number of seconds from unix epoch UTC to a string representing the timestamp of that moment in the current system time zone in the given format. Extracts json object from a json string based on json path specified, and returns json string of the extracted json object. Returns a new string column by converting the first letter of each word to uppercase.

Locate the position of the first occurrence of substr column in the given string. Window function: returns the value that is offset rows before the current row, and null if there is less than offset rows before the current row.

Window function: returns the value that is offset rows before the current row, and defaultValue if there is less than offset rows before the current row. Given a date column, returns the last day of the month which the given date belongs to. Window function: returns the value that is offset rows after the current row, and null if there is less than offset rows after the current row. Window function: returns the value that is offset rows after the current row, and defaultValue if there is less than offset rows after the current row.

Creates a Column of literal value. Locate the position of the first occurrence of substr in a string column, after position pos. Calculates the MD5 digest of a binary column and returns the value as a 32 character hex string. Given a date column, returns the first date which is later than the value of the date column that is on the specified day of the week.

Window function: returns the ntile group id from 1 to n inclusive in an ordered window partition. Returns the value of the first argument raised to the power of the second argument. Extract a specific idx group identified by a java regex, from the specified string column.

Returns the double value that is closest in value to the argument and is equal to a mathematical integer. Calculates the SHA-1 digest of a binary column and returns the value as a 40 character hex string. Calculates the SHA-2 family of hash functions of a binary column and returns the value as a hex string. Sorts the input array for the given column in ascending order, according to the natural ordering of the array elements.

Aggregate function: returns the population standard deviation of the expression in a group. Aggregate function: returns the sample standard deviation of the expression in a group. Returns the substring from string str before count occurrences of the delimiter delim. Substring starts at pos and is of length len when str is String type or returns the slice of byte array that starts at pos in byte and is of length len when str is Binary type.It always performs floating point division.

The final state is converted into the final result by applying a finish function. The value of percentage must be between 0. The accuracy parameter default: is a positive numeric literal which controls approximation accuracy at the cost of memory.

Higher value of accuracy yields better accuracy, 1. When percentage is an array, each value of the percentage array must be between 0. In this case, returns the approximate percentile array of column col at the given percentage array. If no value is set for nullReplacement, any null value is filtered.

### Spark SQL String Functions Explained

The elements of the input array must be orderable. Null elements will be placed at the end of the returned array. If the arrays have no common element and they are both non-empty and either of them contains a null element null is returned, false otherwise. The function returns -1 if its input is null and spark. If spark. By default, the spark. The length of string data includes the trailing spaces. The length of binary data includes binary zeros.

The result is an array of bytes, which can be deserialized to a CountMinSketch before usage. Count-min sketch is a probabilistic data structure used for cardinality estimation using sub-linear space. The result is one plus the previously assigned rank value. Returns NULL if the index exceeds the length of the array. Otherwise, null. Returns 0, if the string was not found or if the given string str contains a comma. If isIgnoreNull is true, returns only non-null values.

If expr2 is 0, the result has no decimal point or fractional part. Input columns should match with grouping columns exactly, or empty means all the grouping columns.

All other letters are in lowercase. Words are delimited by white space. All the input parameters and output column types are string. The default value of offset is 1 and the default value of default is null.

If the value of input at the offset th row is null, null is returned. If there is no such offset row e.

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