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Hive cast string to decimal
Hive cast string to decimal. If the targetType is DECIMAL(p, s) with s greater 0, a decimal point is added and trailing zeros are added up to scale. q and decimal_2. Below is my query to test. For a better understanding, look at the examples below. 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. Some numbers are as-is in their 8-digit form while others are in scientific notation e. Sep 13, 2016 · I've got Hive 1. 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. 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. 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). 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. 0, decimal type support added in Hive 0. Jan 28, 2016 · I want to insert and retrieve a decimal value in hive table. They are decimal_1. 12' '-39. I tried the following : all of them return Null . For example, if there is a trailing whitespace character it will look like a decimal but hive will see the text character (whitespace). 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. When I try to use cast or convert I am getting an arithmetic overflow exception. 00' '28. 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. If D is 0, the result has no decimal point or fractional part. 00. 36666. 02' '28. 简单实例 1. 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. 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 . 0; bug with float types fixed in Hive 0. 12345); //This results in NULL as it exceeds the total digits(5). Hive String Functions List. Test Data:SELECT *… Nov 6, 2023 · The behavior you're observing is related to the precision differences between STRING and FLOAT data types. Other tests such as udf7. 9 indicates the number of decimal digits. 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. As your raw data contains comma in data, You have to load the into table with all columns as string datatype . Hive also supports implicit conversions for primitive data types. Hive cast string to floating decimal. 22 as decimal(14,2)); 11. 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. I have a column which has a timestamp but is set up a string in the tables. 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. Feb 11, 2019 · Here by seeing your question, seems like you are trying to convert bigint value to big decimal, which is not right. Apr 20, 2018 · select cast(recurr as decimal(19, 9)) This should be appropriate for anywhere where the decimal place lurks. q cover the gamut of UDFs mentioned Sep 24, 2018 · explode function Explodes an array to multiple rows. 2345678910231E10 Time taken: 0. 13. Returns a row-set with a single column (col), one row for each element from the array. Nov 26, 2021 · I have a dirty table on Cloudera with a number string column. 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. 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. " 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. 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. It works because 'yyyy-MM-dd HH:mm:ss. 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. Just like NUMBER(38) in Oracle. 14. S' then you can cast it to timestamp type using timestamp() function. Dec 16, 2020 · If the timestamp string is in format 'yyyy-MM-dd HH:mm:ss. Mar 29, 2016 · It works if we give the exact precision value as mentioned in the decimal function. Syntax: FORMAT_NUMBER(number x, int d) Formats the number X to a format like ‘#,###,###. 50 Jan 22, 2022 · I prefer to use regex and nullif for these situations. 231 as double); 1. Aug 31, 2021 · Casting Decimal Values. 1234567E7. 7 Dec 3, 2010 · If I have understood it correctly, you are trying to convert a String representing a given date, to another type. INSERT INTO test1_Decimal values(123. "FF" (no number of digits specified) is also accepted. The issue is that the data stored in the varchar column may contain different precisions and different scales. ') AS double) as Piotr suggests). So how to display and store it without scientific notation？ Any help is appreciated. Feb 27, 2016 · I think you're mixing up the formatting or display of data, with the underlying data itself. 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. 1. 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. Where I am doing wrong. Later use regular expression to remove the comma in data and load into second level hive table with decimal datatype. May 28, 2022 · Thanks for contributing an answer to Stack Overflow! Please be sure to answer the question. Mar 21, 2017 · Actually I'm looking for more details about the sum function in Apache Hive. 1. 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. Asking for help, clarification, or responding to other answers. However, I found this hack to convert decimal to double. 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. 2766E-10 to decimal like below: select cast(1. 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. End Jul 29, 2020 · Hive cast string to floating decimal. Are there any workaround to trim decimal values in Hive 0. 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. 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. Two new tests have been added as part of the TestCliDriver framework within Hive. 00' I have tried converting it into float and then converting into decimal but got unexpected results. You cannot cast a character string that includes a decimal point to an INT or BIGINT. Nov 29, 2018 · I am facing issue in spark sql while converting string to decimal(15,7). 50” in a JSON file, attempting to select and cast the string to an INT fails. 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. 0) string. 0. Feb 5, 2015 · I'm using Hive 0. Simply use the cast function to cast the type from one to another. select cast(-1. Cast Scientific number to Decimal in Hive. If I tried to run the same query as TRIM(STRING(DECIMAL VALUE)), it runs fine in Hive 0. Hive implements decimal with java. Testing Decimal Types. q. But in later versions there has been a major change and DECIMAL without any specification of scale/precision now means "a large integer". 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. 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. Hive CAST function converts the value of an expression to any other type. Not able to get 2 decimal places in Hive query using Hue editor. When numbers end in Dec 30, 2019 · If the result contains decimal, I want the number before the decimal. I tried this but unix_timestamp returns an integer, so I lose the milliseconds:. create table test1_decimal (b decimal (5,3)); INSERT INTO test1_Decimal values(1. cast does not divide your initial numbers. 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 :-). 22 In the above example instead of 11 it should display 11. 14 (which was supported in 0. 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. Learn more Explore Teams Oct 6, 2018 · I want to display the decimal precision along with the result for decimal datatype in hive. 250,99 I want to cast these values into decimal, so I must replace ". For example, if you have “1200. - In datetime to string conversion, "FF" will omit trailing zeros, or output "0" if subsecond value is 0. 12 meant "a large floating point". g. It's also available in Apache Hive and Apache Impala. Provide details and share your research! But avoid …. S' - is a default timestamp format. How to extract a part of a decimal in Hive. 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. 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. 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. 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. 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. 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 to cast it to string but scientific notation appears and both string and decimal lose the last digits. . 13 and I have in a STRING column of my table values like 1. 000); //This will shrink it to 1 as the total digits is not five. 1, and I'm having trouble converting a HEX value into a Decimal or BIGINT. Nov 3, 2015 · Found Decimal". 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. You may report it to hive community si that it will be fixed. The below are the scenarios when we use CAST function. timestamp(col) Also you can insert string directly into timestamp column. Oct 7, 2021 · Now available on Stack Overflow for Teams! AI features where you work: search, IDE, and chat. Do note that the unused decimal places will be zeroes. 6. Ideally, you would store the date as a TIMESTAMP datatype. ##', rounded to D decimal places, and returns the result as a string. floating-point binary Mar 21, 2019 · According to this accepted answer, I should change 1. 10. Dec 31, 2019 · 目录1. hive> select cast(11 as decimal(14,2)); 11 hive> select cast(11. 91234567 vs 9. 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. ##’, rounded to D decimal places, and returns the result as a string. 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). Example: Sep 15, 2023 · Formats the number X to a format like '#,###,###. 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. Input data is: '0. 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. you would need concat_ws function to concatenate comma separated array values to String. How to achieve this? Nov 30, 2016 · Hive cast string to floating decimal. 11 Feb 7, 2023 · In this article let’s learn the most used String Functions syntax, usage, description along with examples. 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. 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. Casting is supported between decimal values and any other primitive type such as integer, double, boolean, and so on. 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. 9] Fraction of second - 1. Now let use check data type conversion function available with Apace Hive. 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. 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. 简单实例 hive> SELECT CAST('12' AS int) ; 12 hive> SELECT CAST('12. 36666E2 as decimal(6,1)) I am expecting the output to be -1. However if there is no fraction part , in hive it will not display the decimal points. "FF Mar 16, 2018 · Casting from decimal to int, double, string and boolean are allowed so you might be hitting a bug. 语法：2. Although I have not used/tested it in most of my work, you may use it at your own discretion. 0) without losing the milliseconds. Nov 25, 2016 · Thanks for contributing an answer to Stack Overflow! Please be sure to answer the question. May 1, 2017 · FF[1. 5' AS decimal(9,2)) num1; num1 12. 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. Apache Hive CAST Function. - In string to datetime conversion, fewer digits than expected are accepted if followed by a delimiter. Mar 10, 2017 · DECIMAL in Hive V0. math. But I got -136. ===> Starting with Hive 0. 2766E-10 as decimal(11, 10)) but it gives me, 1E-10. FLOATs are limited in precision, and Aug 10, 2017 · hive> select cast(12345678910. Nov 21, 2017 · As decimal (3,3) cannot hold any of 3 values. Jun 19, 2012 · I want to convert a varchar(max) column to decimal(10,4). Regex to pull out the decimal value and nullif to account for the empty string situation.
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