替换字符-将string中符合pattern的元素替换为function结果 : regexp_replace(string, pattern, function) → varchar eg:SELECT regexp_replace('new york', '(\w)(\w*)', x -> upper(x[1]) || lower(x[2])); --'New York' 1. 2. 3. 4. 5
regexp_like(string, pattern) → boolean regexp_replace(string, pattern) → varchar regexp_replace(string, pattern, replacement) → varchar regexp_replace(string, pattern, function) → varchar regexp_split(string, pattern) -> array(varchar) 6.11. 二进制函数和运算符 length(binary) → bigint ...
replace(string, ‘a’, ‘b’) → varchar 把字符串中所有的a字符 替换 为 b reverse(string) → varchar 字符串倒序 rtrim(string) → varchar 去掉字符串尾部的空格 split(string, delimiter) → array<varchar> 将字符串按限定符(delimiter)分隔为一个array split(string, delimiter, limit) → array<var...
种类:自定义对象,BOM对象 操作浏览器对象的,DOM对象 操作文档对象模型, 内置对象(String对象,Math对象,Array对象,Function对象,Date对 象,RegEx 正则表达式对象)。对象的定义方法: presto字符串拼接 javascript ViewUI Math 字符串 转载 网线小游侠 4月前 23阅读 presto拼接字符串 string拼接字符串的问题 最近...
split_to_map(string, entryDelimiter, keyValueDelimiter, function(K, V1, V2, R)) map<varchar, varchar> 返回entryDelimiter 和 keyValueDelimiter 拆分字符串后的map,如果有重复key,则根据function指定的规则返回key对应的value 例如:split_to_map('a:1,b:2;a:3',‘,' , ':’, (k, v1, v2)...
spi.function.ScalarFunction; import com.facebook.presto.spi.function.SqlType; import io.airlift.slice.Slice; import io.airlift.slice.Slices; public class PrefixFunction { /** * 为字符串添加一个前缀 * presto中没有String类型,使用Slice代替 */ @ScalarFunction("Prefix") @Description("prefix string...
1publicclassLiulishuoFunctions {23publicstaticfinalString DATE_FORMAT = "yyyy-MM-dd";45@ScalarFunction6@Description("hive to_date function")7@SqlType(StandardTypes.VARCHAR)8publicstaticSlice to_date(@SqlType(StandardTypes.TIMESTAMP)longinput) {9finalDateFormat format =newSimpleDateFormat(DATE_FORMAT...
throw new PrestoException(INVALID_FUNCTION_ARGUMENT, "'" + datetime.toStringUtf8() + " cannot be parsed by format string " + formatString.toStringUtf8() + "."); } } This function takes a varchar date or column, and a varchar format string, and it parses out the date in UTC to th...
(bigint unixtime)function, which returns the value as a timestamp type and Hive'sfrom_unixtime(bigint unixtime[, string format])function, which returns the value as string type and supports formatter, the hive UDF has been implemented asformat_unixtimestamp(bigint unixtime[, string format]...
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