Conversions can be defined by CREATE CONVERSION. The string must be valid in this encoding. The original encoding is specified by src_encoding. NULL arguments are ignored.Ĭonvert( string bytea, src_encoding name, dest_encoding name)Ĭonvert string to dest_encoding. The first argument is used as the separator string. NULL arguments are ignored.Ĭoncat_ws( sep text, str "any" ])Ĭoncatenate all but the first argument with separators. The NULL (0) character is not allowed because text data types cannot store such bytes.Ĭoncat( str "any" ])Ĭoncatenate the text representations of all the arguments. For other multibyte encodings the argument must designate an ASCII character. For UTF8 the argument is treated as a Unicode code point. Remove the longest string consisting only of characters in characters (a space by default) from the start and end of stringĬharacter with the given code. For other multibyte encodings, the argument must be an ASCII character. For UTF8 returns the Unicode code point of the character. Other String Functions FunctionĪSCII code of the first character of the argument. Some of them are used internally to implement the SQL-standard string functions listed in Table 9-6. Trim( string )Īdditional string manipulation functions are available and are listed in Table 9-7. Remove the longest string containing only characters from characters (a space by default) from the start, end, or both ends ( both is the default) of string See Section 9.7 for more information on pattern matching. Substring( string from pattern for escape)Įxtract substring matching SQL regular expression. Substring( string )Įxtract substring matching POSIX regular expression. Overlay('Txxxxas' placing 'hom' from 2 for 4) Overlay( string placing string from int ) String concatenation with one non-string inputĬhar_length( string) or character_length( string) String || non-string or non-string || string SQL String Functions and Operators Function
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