Hive cast string to decimal
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Hive cast string to decimal. 000); //This will shrink it to 1 as the total digits is not five. 语法:2. 250,99 I want to cast these values into decimal, so I must replace ". 00' '28. Until now, I understood that I can specify the number of digits after the dot: val DECIMAL(18, 3) But what I can not find is the precision scale in case of sum. 6. Asking for help, clarification, or responding to other answers. Multiple decimal string Oct 21, 2016 · If your values have any text characters in them, Hive will return null if you try to cast them to decimal. For example, if there is a trailing whitespace character it will look like a decimal but hive will see the text character (whitespace). Not able to get 2 decimal places in Hive query using Hue editor. 1. 9] Fraction of second - 1. 14 (which was supported in 0. How to achieve this? Nov 30, 2016 · Hive cast string to floating decimal. 1234567E7. 164 seconds, Fetched: 1 - 209232 Sep 30, 2019 · Unlike Impala, Hive does not provide support to typeof function to verify the variable or column data types. Just like NUMBER(38) in Oracle. Later use regular expression to remove the comma in data and load into second level hive table with decimal datatype. Bigdecimal is a decimal that must have fixed precision (the maximum number of digits) and scale (the number of digits on right side of dot). 00' I have tried converting it into float and then converting into decimal but got unexpected results. 2345678910231E10 Time taken: 0. S' then you can cast it to timestamp type using timestamp() function. S' - is a default timestamp format. 10. How to extract a part of a decimal in Hive. 11 Feb 7, 2023 · In this article let’s learn the most used String Functions syntax, usage, description along with examples. Some numbers are as-is in their 8-digit form while others are in scientific notation e. cast does not divide your initial numbers. Casting is supported between decimal values and any other primitive type such as integer, double, boolean, and so on. 91234567 vs 9. Returns a row-set with a single column (col), one row for each element from the array. q. 0) without losing the milliseconds. The issue is that the data stored in the varchar column may contain different precisions and different scales. Dec 16, 2020 · If the timestamp string is in format 'yyyy-MM-dd HH:mm:ss. Testing Decimal Types. Here is my snippet which always returns NULL: CREATE TABLE complex_types (c1 decimal); INSERT INTO TABLE complex_types SELECT cast('100' as decimal); SELECT * FROM complex_types; Apr 8, 2016 · Since your date columns are in integer datatype, cast them as string and use Hive's built-in date functions. Nov 29, 2018 · I am facing issue in spark sql while converting string to decimal(15,7). You may report it to hive community si that it will be fixed. Here is how you use it – cast(str_column as int) SELECT col1, cast(str_col as int), col3 from sample_table; Jul 28, 2017 · I am running queries in a hive environment. Jan 4, 2021 · Converting a String column to an Integer column or converting a column from one type to another is quite simple in Hive. timestamp(col) Also you can insert string directly into timestamp column. So how to display and store it without scientific notation? Any help is appreciated. Conv(STRING num, int from_base, int to_base) Cast Scientific number Mar 28, 2018 · Do you know how to format the output of a number in hive with thousand separator? For example: data:146452664 output:146,452,664 I use this in Teradata, but don't know how to achieve in Hive. select cast(-1. If I tried to run the same query as TRIM(STRING(DECIMAL VALUE)), it runs fine in Hive 0. Ideally, you would store the date as a TIMESTAMP datatype. Mar 29, 2016 · It works if we give the exact precision value as mentioned in the decimal function. . Sep 13, 2016 · I've got Hive 1. Apr 20, 2018 · select cast(recurr as decimal(19, 9)) This should be appropriate for anywhere where the decimal place lurks. Do note that the unused decimal places will be zeroes. 231 as double); 1. However, I found this hack to convert decimal to double. hive> select cast(11 as decimal(14,2)); 11 hive> select cast(11. 02' '28. This tutorial covers the different methods to convert a string to a date in Hive, including using the built-in functions, user-defined functions, and external libraries. q cover the gamut of UDFs mentioned Sep 24, 2018 · explode function Explodes an array to multiple rows. Jun 25, 2023 · Hive CAST(from_datatype as to_datatype) function is used to convert from one data type to another for example to cast String to Integer (int), String to Bigint, String to Decimal, Decimal to Int data types, and many more. Other tests such as udf7. 22 In the above example instead of 11 it should display 11. Note: (As @Samson Scharfrichter has mentioned) the default representation of a date is ISO8601 Nov 15, 2017 · i have this String '5666,232343' and i want to convert it to Decimal, i use cast('5666,232343' as decimal(7,5)) but it returns NULL value. I tried the following : all of them return Null . ') AS double) as Piotr suggests). Two new tests have been added as part of the TestCliDriver framework within Hive. When I try to use cast or convert I am getting an arithmetic overflow exception. 36666. 0. But I got -136. get_json_object(string json_string, string path) Jan 1, 1970 · The result is the literal number with an optional minus-sign and no leading zeros except for the single digit to the left of the decimal point. ===> Starting with Hive 0. Input data is: '0. For example, if you have “1200. If the table stores a date as a string formatted in one manner, [27/Feb/2016:00:24:31 +0530] it's still a string, and strings sort differently than actual dates, timestamps, or numbers. 36666E2 as decimal(6,1)) I am expecting the output to be -1. It can convert a string to an integer, an integer to a decimal, a string to a date, and a date to a timestamp, among other things. Please feel free to provide any additional information or details about your query, and we hope that you will find a satisfactory solution to your quest Aug 23, 2019 · There is no way to change a setting to make Athena read the values as doubles, but there are ways around it. Although I have not used/tested it in most of my work, you may use it at your own discretion. Hive implements decimal with java. If D is 0, the result has no decimal point or fractional part. Sep 15, 2015 · Use it only as a last resort, when you have absolutely no clue of the scale and precision of your data, and provision for verbose code to handle rounding errors. BigDecimal and if you put your nose into OpenJDK source code you will find that BigDecimal is just a BigInteger plus the "position" as the (fixed) position of the decimal separator. 1 Hive: how to display and store a 20-digit integer without using scientific notation? 1 Nov 1, 2018 · SELECT (cast(cast(a as string) asdouble)) from src; 我们也可以将一个String类型的数据转换成BINARY类型。 (3)、对于Date类型的数据,只能在Date、Timestamp以及String之间进行转换。 Feb 8, 2018 · I have a problem when casting and rounding to float in HIVE, I have string fields that I want to cast it to float with 3 decimal digits, but it shows always the entire float without rounding it. 00. If I add 2 decimals with a precision scale of 3 for example, what will be the return of the sum function? Jul 28, 2014 · I need the output of a string column in my table as 13 length char, irrespective of whatever length it is, i need to stuff the remaining chars with 0 I tried to use the following code in my hive Dec 24, 2018 · I am trying to read an RDBMS table on Greenplum database using spark. One of the commonly used functions in RDBMS is the CAST function, which helps to transform the expression of one data type to another data type. Jun 19, 2012 · I want to convert a varchar(max) column to decimal(10,4). This way you don't have to include the Oct 19, 2018 · Since bigint can only deal with number less than 19-digit, casting it to bigint results in a wrong number. Test Data:SELECT *… Nov 6, 2023 · The behavior you're observing is related to the precision differences between STRING and FLOAT data types. 0, decimal type support added in Hive 0. math. How can I disable scientific notation in Hive or how can I convert such small numbers in scientific notation to decimal values? Learn how to convert a string to a date in Hive with an example. q and decimal_2. Example: Sep 15, 2023 · Formats the number X to a format like '#,###,###. create table test1_decimal (b decimal (5,3)); INSERT INTO test1_Decimal values(1. floating-point binary Mar 21, 2019 · According to this accepted answer, I should change 1. 12345); //This results in NULL as it exceeds the total digits(5). End Jul 29, 2020 · Hive cast string to floating decimal. Feb 11, 2019 · Here by seeing your question, seems like you are trying to convert bigint value to big decimal, which is not right. But in later versions there has been a major change and DECIMAL without any specification of scale/precision now means "a large integer". The below are the scenarios when we use CAST function. Nov 26, 2021 · I have a dirty table on Cloudera with a number string column. I tried to cast it to string but scientific notation appears and both string and decimal lose the last digits. Hive cast string to floating decimal. With every new version, Hive has been releasing new String functions to work with Query Language (HiveQL), you can use these built-in functions on Hive Beeline CLI Interface or on HQL queries using different languages and frameworks. csv' into table patients; Now when I am using the command: hive>select * from patients limit 5; I am getting the output: Oct 16, 2017 · I want to cast the number which has scientific notation to Decimal in Hive, But I am getting wrong output. 1, and I'm having trouble converting a HEX value into a Decimal or BIGINT. SELECT ,To_date(activitydate) Cast:,cast(activitydate as timestamp) This is the how the data is set up in the table: Appreciate any inputs on how I can convert this : Dec 2, 2021 · Someone would expect that a comparison between decimal column and a string literal (Q2) would also lead to unexpected results in Hive 3. It works because 'yyyy-MM-dd HH:mm:ss. FLOATs are limited in precision, and Aug 10, 2017 · hive> select cast(12345678910. However if there is no fraction part , in hive it will not display the decimal points. ##’, rounded to D decimal places, and returns the result as a string. q cover the gamut of UDFs mentioned Dec 18, 2019 · If the number cannot be cast to decimal, NULL is returned, for example the following cast returns NULL: select cast(1234567890L as decimal(3,1)) It is not clear why do you expect cast a bigint to decimal(18,5) to produce some fractional numbers. 22 as decimal(14,2)); 11. 0) string. The result of the function will be NULL in case if function Jul 21, 2016 · In the database world a decimal(p,s) (or numeric(p,s)) is a fixed-point decimal -- with a few exceptions or edge cases. 14. Learn more Explore Teams Oct 6, 2018 · I want to display the decimal precision along with the result for decimal datatype in hive. - In string to datetime conversion, fewer digits than expected are accepted if followed by a delimiter. For a better understanding, look at the examples below. INSERT INTO test1_Decimal values(123. As a workaround, cast to a FLOAT or DOUBLE type, and then cast to an INT, assuming you want to lose digits to the right of the decimal point. - In datetime to string conversion, "FF" will omit trailing zeros, or output "0" if subsecond value is 0. Hive CAST function converts the value of an expression to any other type. Feb 27, 2016 · I think you're mixing up the formatting or display of data, with the underlying data itself. "FF Mar 16, 2018 · Casting from decimal to int, double, string and boolean are allowed so you might be hitting a bug. 1. Provide details and share your research! But avoid …. Dec 2, 2021 · For a long time, Hive used to cast strings to doubles in order to perform arithmetic operations, while for comparisons decimal types were preferred over doubles. (As of Hive 0. 简单实例 1. 50 Jan 22, 2022 · I prefer to use regex and nullif for these situations. Dec 31, 2019 · 目录1. 5' AS decimal(9,2)) num1; num1 12. Below is my query to test. Oct 14, 2014 · I have a string '20141014123456789' which represents a timestamp with milliseconds that I need to convert to a timestamp in Hive (0. 0 by casting the operands to doubles but this case was Feb 1, 2021 · Instead of using casting/converting functions to transform the integer values to decimal values, Hive provided a direct function that helps in those situations. 简单实例 hive> SELECT CAST('12' AS int) ; 12 hive> SELECT CAST('12. 13 you can use the DECIMAL(x,y) data type, at long last :-) The Apache Hive CAST function is a type conversion function that converts data types from one to another. 2766E-10 to decimal like below: select cast(1. Cast Scientific number to Decimal in Hive. They are decimal_1. "FF" (no number of digits specified) is also accepted. 9 indicates the number of decimal digits. Feb 5, 2015 · I'm using Hive 0. Simply use the cast function to cast the type from one to another. Nov 3, 2015 · Found Decimal". Due to the volume of queries that should under go this casting change, is it possible to set this Implicit casting at a global level (say SET). Regex to pull out the decimal value and nullif to account for the empty string situation. Mar 21, 2017 · Actually I'm looking for more details about the sum function in Apache Hive. 12' '-39. Hive String Functions List. 语法: CAST (expression AS data_type) 参数说明: expression:任何有效的字段或表达式。AS:用于分隔两个参数,在AS之前的是要处理的数据,在AS之后是要转换的数据类型 2. Aug 31, 2021 · Casting Decimal Values. It's also available in Apache Hive and Apache Impala. Nov 25, 2016 · Thanks for contributing an answer to Stack Overflow! Please be sure to answer the question. Jan 28, 2016 · I want to insert and retrieve a decimal value in hive table. 12 meant "a large floating point". When you cast a STRING to a FLOAT, Hive attempts to interpret and represent the value as accurately as possible within the constraints of a FLOAT data type. Mar 10, 2017 · DECIMAL in Hive V0. Hive also supports implicit conversions for primitive data types. Nov 21, 2017 · As decimal (3,3) cannot hold any of 3 values. 50” in a JSON file, attempting to select and cast the string to an INT fails. g. Nov 5, 2023 · Here's how you can cast your STRING column to DECIMAL to preserve the exact decimal value: SELECT a, CAST(a AS DECIMAL(20, 10)) AS exact_value FROM your_table; In this example, DECIMAL(20, 10) indicates a decimal type with a total width of 20 digits and 10 decimal places. Feb 7, 2023 · In this article, I will explain Hive cast function syntax and examples of how to cast a string to int, bigint, and decimal data types. I have the following columns: val allColumnsSeq: Seq[String] = Seq("usd_exchange_rate", "usd_exchange_rate::character varying as Dec 2, 2001 · If I change data type of salary column to String then as expected, Hive works fine. 13 and I have in a STRING column of my table values like 1. you would need concat_ws function to concatenate comma separated array values to String. " Aug 18, 2016 · I am creating a table in hive; create table patients( patient_id INT, age_group STRING, gender STRING, income_range STRING ) ROW FORMAT DELIMITED FIELDS TERMINATED BY ' '; load data local inpath '/mnt/patients. ##', rounded to D decimal places, and returns the result as a string. You cannot cast a character string that includes a decimal point to an INT or BIGINT. Mar 4, 2015 · You can use the CAST function to cast your STRING to a BIGINT, like so: SELECT CAST('00321' AS BIGINT) FROM table; As a BIGINT it will show on the screen and in delimited text files as 321 . Oct 7, 2021 · Now available on Stack Overflow for Teams! AI features where you work: search, IDE, and chat. Th problem is that the comma is not already there in the initial string field, so I am looking to see if there is a way to tell Hive to put this decimal 3 positions before the end of the string :-). I have a column which has a timestamp but is set up a string in the tables. Syntax: FORMAT_NUMBER(number x, int d) Formats the number X to a format like ‘#,###,###. As your raw data contains comma in data, You have to load the into table with all columns as string datatype . 2766E-10 as decimal(11, 10)) but it gives me, 1E-10. When numbers end in Dec 30, 2019 · If the result contains decimal, I want the number before the decimal. 13. May 1, 2017 · FF[1. If the targetType is DECIMAL(p, s) with s greater 0, a decimal point is added and trailing zeros are added up to scale. 0; bug with float types fixed in Hive 0. Jan 19, 2018 · I want to convert this table in an ORC table, but some of the STRING fields must be cast to decimal with precision = 3. Apache Hive CAST Function. 7 Dec 3, 2010 · If I have understood it correctly, you are trying to convert a String representing a given date, to another type. Feb 1, 2021 · Instead of using casting/converting functions to transform the integer values to decimal values, Hive provided a direct function that helps in those situations. Are there any workaround to trim decimal values in Hive 0. May 28, 2022 · Thanks for contributing an answer to Stack Overflow! Please be sure to answer the question. You will have to use string as the data type of the column in both cases: Create a view that converts the value to doubles (using CAST(replace(text, ',', '. I tried this but unix_timestamp returns an integer, so I lose the milliseconds:. Now let use check data type conversion function available with Apace Hive. Where I am doing wrong. Nov 6, 2023 · , Welcome to our community! To help you get the best possible answer, I have tagged in our Hive experts who may be able to assist you further. Here what you need: select date_format(from_unixtime(unix_timestamp(cast(your-column as string),'yyyyMMHHmm')),'yyyy-MM HH:mm') from table; The above code gave me the following results. ninmtie wfdgqqf frqg gdy besuuf crs qipxoig ekuire wgqq xwflm