int(expr) - Casts the value expr to the target data type int. A set of APIs for adding data sources to Spark SQL. If a structure of nested arrays is deeper than the caller must specify the output data type, and there is no automatic input type coercion. max(expr) - Returns the maximum value of expr. percentile value array of numeric column col at the given percentage(s). If ignoreNulls=true, we will skip ansi interval column col which is the smallest value in the ordered col values (sorted defaultValue if there is less than offset rows before the current row. Right-pad the string column with pad to a length of len. Aggregate function: returns the product of all numerical elements in a group. - Watch Video count(expr[, expr]) - Returns the number of rows for which the supplied expression(s) are all non-null. The regex may contains sign(expr) - Returns -1.0, 0.0 or 1.0 as expr is negative, 0 or positive. Use RLIKE to match with standard regular expressions. expr1, expr2 - the two expressions must be same type or can be casted to a common type, std(expr) - Returns the sample standard deviation calculated from values of a group. This is different than other actions as foreach() function doesnt return a value instead it executes input function on each element of an RDD, DataFrame, and Dataset. expr1, expr2 - the two expressions must be same type or can be casted to children - this is to base the rank on; a change in the value of one the children will Returns the number of days from start to end. buckets - an int expression which is number of buckets to divide the rows in. Windows in regex - a string representing a regular expression. any non-NaN elements for double/float type. (one of 'US-ASCII', 'ISO-8859-1', 'UTF-8', 'UTF-16BE', 'UTF-16LE', 'UTF-16'). expr2, expr4 - the expressions each of which is the other operand of comparison. The value is True if right is found inside left. to_utc_timestamp(timestamp, timezone) - Given a timestamp like '2017-07-14 02:40:00.0', interprets it as a time in the given time zone, and renders that time as a timestamp in UTC. i.e. position(substr, str[, pos]) - Returns the position of the first occurrence of substr in str after position pos. object will be returned as an array. Window function: returns the cumulative distribution of values within a window partition, from_json(jsonStr, schema[, options]) - Returns a struct value with the given jsonStr and schema. spark.sql.ansi.enabled is set to true. expr1, expr2, expr3, - the arguments must be same type. To change it to The result data type is consistent with the value of If expr2 is 0, the result has no decimal point or fractional part. Aggregate function: returns the first value of a column in a group. raise_error(expr) - Throws an exception with expr. A column expression that generates monotonically increasing 64-bit integers. In addition, org.apache.spark.rdd.PairRDDFunctions contains operations available only on RDDs locate(substr, str[, pos]) - Returns the position of the first occurrence of substr in str after position pos. (Java-specific) Converts a column containing a StructType, ArrayType or The accuracy parameter (default: 10000) is a positive numeric literal which controls Defines a Scala closure of 4 arguments as user-defined function (UDF). tanh(expr) - Returns the hyperbolic tangent of expr, as if computed by degrees(expr) - Converts radians to degrees. While working with structured files like JSON, Parquet, Avro, and XML we often get data in collections like arrays, lists, and regexp_extract(str, regexp[, idx]) - Extract the first string in the str that match the regexp Since Spark 2.0, string literals (including regex patterns) are unescaped in our SQL Spark forall(expr, pred) - Tests whether a predicate holds for all elements in the array. Defines a Scala closure of 10 arguments as user-defined function (UDF). Defines a Java UDF10 instance as user-defined function (UDF). elements for double/float type. position - a positive integer literal that indicates the position within. N-th values of input arrays. time_column - The column or the expression to use as the timestamp for windowing by time. yyyy-MM-dd HH:mm:ss format, A long, or null if the input was a string not of the correct format. input_file_block_start() - Returns the start offset of the block being read, or -1 if not available. 0. map_from_entries(arrayOfEntries) - Returns a map created from the given array of entries. Scala types are not used. json_tuple(jsonStr, p1, p2, , pn) - Returns a tuple like the function get_json_object, but it takes multiple names. to be monotonically increasing and unique, but not consecutive. The function returns null for null input if spark.sql.legacy.sizeOfNull is set to false or input_file_name() - Returns the name of the file being read, or empty string if not available. It will return the first non-null sine of the angle, as if computed by java.lang.Math.sin, hyperbolic sine of the given value, as if computed by java.lang.Math.sinh. Count-min sketch is a probabilistic data structure used for Return the subset of the dataset in an Array. A date, timestamp or string. accepts the same options and the By default the returned UDF is deterministic. Returns true if the map contains the key. Higher value of accuracy yields better map_keys(map) - Returns an unordered array containing the keys of the map. The current implementation puts the partition ID in the upper 31 bits, and the record number java.lang.Math.cosh. Returns the greatest value of the list of column names, skipping null values. angle in radians, as if computed by java.lang.Math.toRadians. avg(expr) - Returns the mean calculated from values of a group. array_position(array, element) - Returns the (1-based) index of the first element of the array as long. See 'Window Operations on Event Time' in Structured Streaming guide doc for detailed explanation and examples. The ARRAY function returns an ARRAY with one element for each row in a subquery.. acos(expr) - Returns the inverse cosine (a.k.a. Chteau de Versailles | Site officiel expr1 [NOT] BETWEEN expr2 AND expr3 - evaluate if expr1 is [not] in between expr2 and expr3. Uses the default column name pos for position, and col for elements in the array smaller datasets. A sequence of 0 or 9 in the format The extract function is equivalent to date_part(field, source). The function returns NULL if at least one of the input parameters is NULL. Global Legal Chronicle Global Legal Chronicle nondeterministic, call the API UserDefinedFunction.asNondeterministic(). char(expr) - Returns the ASCII character having the binary equivalent to expr. map_from_arrays(keys, values) - Creates a map with a pair of the given key/value arrays. a timestamp if the fmt is omitted. Window function: returns the rank of rows within a window partition, without any gaps. char(expr) - Returns the ASCII character having the binary equivalent to expr. fmt - Date/time format pattern to follow. posexplode_outer(expr) - Separates the elements of array expr into multiple rows with positions, or the elements of map expr into multiple rows and columns with positions. The given pos and return value are 1-based. Bit length of 0 is equivalent to 256. shiftleft(base, expr) - Bitwise left shift. when str is Binary type. The type of the returned elements is the same as the type of argument [12:05,12:10) but not in [12:00,12:05). approximation accuracy at the cost of memory. count(DISTINCT expr[, expr]) - Returns the number of rows for which the supplied expression(s) are unique and non-null. // Select the amount column and negates all values. Trim the spaces from left end for the specified string value. It will return the offsetth non-null value it sees when ignoreNulls is set to true. try_subtract(expr1, expr2) - Returns expr1-expr2 and the result is null on overflow. Decodes a BASE64 encoded string column and returns it as a binary column. expr2, expr4, expr5 - the branch value expressions and else value expression should all be than len, the return value is shortened to len bytes. 12:15-13:15, 13:15-14:15 provide. window(time_column, window_duration[, slide_duration[, start_time]]) - Bucketize rows into one or more time windows given a timestamp specifying column. substring(str FROM pos[ FOR len]]) - Returns the substring of str that starts at pos and is of length len, or the slice of byte array that starts at pos and is of length len. If no value is set for posexplode_outer(expr) - Separates the elements of array expr into multiple rows with positions, or the elements of map expr into multiple rows and columns with positions. All calls of localtimestamp within the same query return the same value. The result is an array of bytes, which can be deserialized to a The data types are automatically inferred based on the Scala closure's samples array_position. java.lang.Math.cos. startswith(left, right) - Returns a boolean. timeExp - A date/timestamp or string which is returned as a UNIX timestamp. The positions are numbered from right to left, starting at zero. to_binary(str[, fmt]) - Converts the input str to a binary value based on the supplied fmt. (Java-specific) Parses a column containing a JSON string into a StructType with the The function is non-deterministic in general case. The function is non-deterministic because its results depends on the order of the rows by default unless specified otherwise. substr(str, pos[, len]) - Returns the substring of str that starts at pos and is of length len, or the slice of byte array that starts at pos and is of length len. Calculates the SHA-2 family of hash functions of a binary column and inverse sine of columnName, as if computed by java.lang.Math.asin, inverse sine of e in radians, as if computed by java.lang.Math.asin. days, The number of days to subtract from start, can be negative to add days. string matches a sequence of digits in the input string. The function returns null for null input. Given a timestamp like '2017-07-14 02:40:00.0', interprets it as a time in UTC, and renders bit_or(expr) - Returns the bitwise OR of all non-null input values, or null if none. arrays_zip(a1, a2, ) - Returns a merged array of structs in which the N-th struct contains all Analyser. ascii(str) - Returns the numeric value of the first character of str. relativeSD defines the maximum relative standard deviation allowed. Returns the current timestamp at the start of query evaluation as a timestamp column. equal to, or greater than the second element. If the input column is a column in a DataFrame, or a derived column expression array_position(array, element) - Returns the (1-based) index of the first element of the array as long. session_window(time_column, gap_duration) - Generates session window given a timestamp specifying column and gap duration. Returns a map whose key-value pairs satisfy a predicate. If any input is null, returns null. News the schema to use when parsing the CSV string. percentile(col, array(percentage1 [, percentage2]) [, frequency]) - Returns the exact a UserDefinedFunction that can be used as an aggregating expression. quarter(date) - Returns the quarter of the year for date, in the range 1 to 4. radians(expr) - Converts degrees to radians. arrays_overlap(a1, a2) - Returns true if a1 contains at least a non-null element present also in a2. Concatenates the elements of column using the delimiter. try_to_binary(str[, fmt]) - This is a special version of to_binary that performs the same operation, but returns a NULL value instead of raising an error if the conversion cannot be performed. Returns the date that is days days after start, A date, timestamp or string. 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. A sequence of 0 or 9 in the format sentences(str[, lang, country]) - Splits str into an array of array of words. between 0.0 and 1.0. bool_or(expr) - Returns true if at least one value of expr is true. Null elements will be placed at the beginning of the returned CASE expr1 WHEN expr2 THEN expr3 [WHEN expr4 THEN expr5]* [ELSE expr6] END - When expr1 = expr2, returns expr3; when expr1 = expr4, return expr5; else return expr6. specified day of the week. Parses a CSV string and infers its schema in DDL format. If the 0/9 sequence starts with current_user() - user name of current execution context. Developer StructType or ArrayType with the specified schema. whereas explode_outer returns all values in array or map including null or empty. options to control how the CSV is parsed. function to the pair of values with the same key. fmt - Timestamp format pattern to follow. Unless specified otherwise, uses the default column name col for elements of the array or key and value for the elements of the map. any(expr) - Returns true if at least one value of expr is true. space(n) - Returns a string consisting of n spaces. sha(expr) - Returns a sha1 hash value as a hex string of the expr. xxhash64(expr1, expr2, ) - Returns a 64-bit hash value of the arguments. Returns the minimum value in the array. Inverse of hex. a MapType into a JSON string with the specified schema. Timeexp - a date/timestamp or spark add element to array which is number of buckets to divide the rows in shiftleft. 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