从字符串中去除重音符号,并以小写输出
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作者:Thom Brown
摘自 pgsql-general 邮件列表。
CREATE OR REPLACE FUNCTION unaccent_string(text) RETURNS text AS $$
my ($input_string) = @_;
$input_string =~ s/[âãäåāăą]/a;
$input_string =~ s/[ÁÂÃÄÅĀĂĄ]/A;
$input_string =~ s/[èééêëēĕėęě]/e;
$input_string =~ s/[ĒĔĖĘĚ]/E;
$input_string =~ s/[ìíîïìĩīĭ]/i;
$input_string =~ s/[ÌÍÎÏÌĨĪĬ]/I;
$input_string =~ s/[óôõöōŏő]/o;
$input_string =~ s/[ÒÓÔÕÖŌŎŐ]/O;
$input_string =~ s/[ùúûüũūŭů]/u;
$input_string =~ s/[ÙÚÛÜŨŪŬŮ]/U;
return $input_string;
$$ LANGUAGE plperl;
CREATE OR REPLACE FUNCTION unaccent_string(text)
RETURNS text
IMMUTABLE
STRICT
LANGUAGE SQL
AS $$
SELECT translate(
$1,
'âãäåāăąÁÂÃÄÅĀĂĄèééêëēĕėęěĒĔĖĘĚìíîïìĩīĭÌÍÎÏÌĨĪĬóôõöōŏőÒÓÔÕÖŌŎŐùúûüũūŭůÙÚÛÜŨŪŬŮ',
'aaaaaaaaaaaaaaaeeeeeeeeeeeeeeeiiiiiiiiiiiiiiiiooooooooooooooouuuuuuuuuuuuuuuu'
);
$$;
将任何文本从字符串转换为 URI(小写 ASCII)
作者:Pim Koeman 许可证:CC 署名-相同方式共享 3.0 未移植
CREATE OR REPLACE FUNCTION name2uri(text)
RETURNS text
IMMUTABLE
STRICT
LANGUAGE SQL
AS $$
SELECT replace(trim(regexp_replace(translate(
lower($1),
'áàâãäåāăąèééêëēĕėęěìíîïìĩīĭḩóôõöōŏőùúûüũūŭůäàáâãåæçćĉčöòóôõøüùúûßéèêëýñîìíïş',
'aaaaaaaaaeeeeeeeeeeiiiiiiiihooooooouuuuuuuuaaaaaaeccccoooooouuuuseeeeyniiiis'
), '[^a-z0-9\-]+', ' ', 'g')),' ', '-');
$$;