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The list of hive pre-defined UDF functions is as follows, mainly from the translation of describe function XXX and code Annotations :) ABS (x)-returns the absolute value of X ACOs (x)-returns the arc cosine of X if-1 ASCII (STR)-returns the numeric value of the first character of STR Asin (x)-returns the arc sine of X if-1 Bin (N)-returns N in binary Convert to binary Ceil (x)-find the smallest integer not smaller than X Ceiling

is also difficult to write, fortunately I just wrote some simple operation.4. Even for simple operation of cells, because there are many situations, such as not valid values, it is very troublesome to write themselves, and the most convenient way is to call the system the original method.Post a function of this write, is a list of proceeds to seek the maximum drawdown.1 FunctionJdrawback (rrange asRange)2 DimN as Long3 DimD as Double4 DimCurrentmax as Double5 DimCurrentmaxdrawba

accurate prediction of all the data distinct results. This is a good wish, when the data of sample is relatively small, there are some cases under the pattern of the sample with the complete data form there is a large difference, at this time the error will be relatively large.Ten, the test of the efficiency of different sample proportion executionThe sampling scale is less than the time difference after 1/100, when the maximum consumption is on the data read, not on the distinct calculation.11

/* T-sql:17 a date-time related Custom function (UDF), Sunday as the last day of the week, not affected by the @ @DateFirst, language version are collected or refined from the old articles! Tips: (@ @Datefirst + datepart (weekday, @Date))% 7 judgment Week is the most insured! Independent of @ @DateFirst and language version @ @DateFirst may cause datepart (weekday, @Date) different! No matter what the @ @DateFirst equals, no matter what language versi

Import Java.math.BigDecimal; Import Org.apache.hadoop.hive.ql.exec.UDF; * * This method returns the corresponding value of the BigDecimal type of a numeric value of type Double, where the style returned is a string type/public class udfcastdouble extends UDF {public String evaluate (double number) { //doublevalue () is the original value for the double, because number is the encapsulated class object of double, is not a value

function | function/* T-sql:17 a date-time related Custom function (UDF), Sunday as the last day of the week, not affected by the @ @DateFirst, language version are collected or refined from the old articles! Tips: (@ @Datefirst + datepart (weekday, @Date))% 7 judgment Week is the most insured! Independent of @ @DateFirst and language version @ @DateFirst may cause datepart (weekday, @Date) different! No matter what the @ @DateFirst equals, no matter

MySQL's UDF is essentially a dynamic connection library that does not need to set an entry point (*nix is called a shared library). Debugging a DLL can be a personal act. Now let me introduce you to a very simple, easy-to-use debugging method. This approach uses the Windows API directly, language-independent, development-tool-independent, project-type independent, and a typical three-no debugging method. Also, the debugging methods we discussed here s

functions May is not resolved correctly, as they is resolved to the nearest symbol) ; [0] 0x09000000128a2d78 Pdlog + 0xE0 [1] 0x09000000127ae148 [emailprotected] + 0xAC [2] 0x09000 00011b88d98 Sqlersendfmpstart__fp13sqlerfmpparmsp14sqlerfmphandlep5sqlca + 0xE4 [3] 0x09000000145c591c Sqlerinvokefencedroutine__fp13sqlerfmpparms + 0x1244 [4] 0x0900000012895188 SQLRIINVOKEINVOKER__FP10SQLRI _ufobb + 0x4d4 [5] 0x09000000128944c8 SQLRICALL__FP8SQLRR_CB + 0x12c [6] 0x09000000129260a4 sql

Label:Since Hive0.13.0 started, the method of creating temporary functions for UDFs using the HiveServer2 JDBC approach is:ADD JAR ${hiveudfjarpath}Create temporary function MD5 as ' com.hugedata.hive.udf.codec.UDFMd5 ';SwitchCreate temporary function MD5 as ' com.hugedata.hive.udf.codec.UDFMd5 ' USING JAR ${hiveudfjarpath};The evil of this modification, let me busy for a long day.Exception stack trace information:Exception in thread ' main ' java.sql.SQLException:Error while processing statemen

Today we are mainly studyingMason Rotation AlgorithmIt is used to generate pseudo-random numbers. In fact, there are many methods to generate pseudo-random numbers, such as the linear same-remainder method, China and France. However, the random number quality produced by these methods is often not very high.Mason Rotation AlgorithmHigh-quality pseudo-accompanying Number of machines, and the efficiency is efficient, making up for the shortcomings of the traditional pseudo-random number generator.

BootStrap Form Verification FormValidation: Adjust the instance code of the feedback icon location, bootstrapform In some cases, the feedback icon is incorrectly displayed. By default, Bootstrap defines the position of the feedback icon as follows: .has-feedback .form-control-feedb