📅  最后修改于: 2020-12-02 06:04:29             🧑  作者: Mango
下表列出了Tajo中的字符串函数。
S.No. | Function & Description |
---|---|
1 | concat(string1, …, stringN)
Concatenate the given strings. |
2 | length(string)
Returns the length of the given string. |
3 | lower(string)
Returns the lowercase format for the string. |
4 | upper(string)
Returns the uppercase format for the given string. |
5 | ascii(string text)
Returns the ASCII code of the first character of the text. |
6 | bit_length(string text)
Returns the number of bits in a string. |
7 | char_length(string text)
Returns the number of characters in a string. |
8 | octet_length(string text)
Returns the number of bytes in a string. |
9 | digest(input text, method text)
Calculates the Digest hash of string. Here, the second arg method refers to the hash method. |
10 | initcap(string text)
Converts the first letter of each word to upper case. |
11 | md5(string text)
Calculates the MD5 hash of string. |
12 | left(string text, int size)
Returns the first n characters in the string. |
13 | right(string text, int size)
Returns the last n characters in the string. |
14 | locate(source text, target text, start_index)
Returns the location of specified substring. |
15 | strposb(source text, target text)
Returns the binary location of specified substring. |
16 | substr(source text, start index, length)
Returns the substring for the specified length. |
17 | trim(string text[, characters text])
Removes the characters (a space by default) from the start/end/both ends of the string. |
18 | split_part(string text, delimiter text, field int)
Splits a string on delimiter and returns the given field (counting from one). |
19 | regexp_replace(string text, pattern text, replacement text)
Replaces substrings matched to a given regular expression pattern. |
20 | reverse(string)
Reverse operation performed for the string. |