sql - Can't trim() Char(195) in MySQL -

-

i imported , in process of cleaning data exported older mainframe , have quite few lines start abnormal character (i.e. ascii characters 194, 195, 226, etc). can trim off of characters simple remainder = trim(leading '%' remainder) (where '%' represents character in question.

the character won't removed 'Í'. if run remainder = trim(leading 'Í' remainder) query won't find , trim character, if run ascii(remainder) query on data shows character 195 strings start character.

next ran remainder = trim(leading char(195) remainder) query , skipped character well.

why able remove else 1 character when mysql can convert it's ascii character code , doesn't have issues displaying character when normal select query run , applicable records displayed?

update have run following queries:

remainder = trim(leading convert('Í' using ascii) remainder)  remainder = trim(leading convert('Í' using utf8) remainder)  remainder = trim(leading convert(char(195) using ascii) remainder)

your query works correctly on mysql ( 5.5.44-0ubuntu0.14.04.1 ).

possibly reason doesn't work that, due character set mismatch, see character 195 is not character 195 @ all; might example 0xcd hex, or utf8 sequence corresponding 0xc38d hex, in case trimming 'Í' apparently transform in weirder.

try using hex() check character in question. it?

cd     latin1 Í c38d   utf8   Í      <--- c3     char(195)

notice Í not char(195) @ all, 195 is beginning of Í in utf8.

in pinch, can perform operation... in hex.

select unhex(trim(leading 'c38d' hex('Íturalde'))); +---------------------------------------------------+ | unhex(trim(leading 'c38d' hex('Íturalde')))  | +---------------------------------------------------+ | turalde                                           | +---------------------------------------------------+

this only ever trim leading c38d, or utf8 Í, while ignoring else.

update: may want dump table text file , try running recode, iconv or fixcode on it.


Comments

Post a Comment

Popular posts from this blog

Fail to load namespace Spring Security http://www.springframework.org/security/tags -

-
i have problem namespace of spring security on xhtml page. don't understand why can't load uri, , have following issue: whitelabel error page application has no explicit mapping /error, seeing fallback. tue jul 21 16:58:12 utc 2015 there unexpected error (type=not found, status=404). please need help! possible uri has been changed? best regards you using incorrect namespace url. correct url http://www.springframework.org/schema/security the error page seeing spring source website since not recognize url. try visiting http://www.springsource.org/security/tags in browser update : spring security tags used in jsp page correct tag lib declaration is: <%@ taglib prefix="sec" uri="http://www.springframework.org/security/tags" %>
Read more

sql - MySQL query optimization using coalesce -

-
can explain me why second query faster first? (first 1 takes around 40 seconds, second 1 less 0.1) select releases.feature_code, releases.platform_id, version, release_date, general_available, uri, filesize, display_name, feature_name.full_name, if ((select exists(select 1 release_exceptions releases.feature_code = release_exceptions.feature_code , releases.platform_id = release_exceptions.platform_id , releases.version = release_exceptions.version) = 1), 1, 0) release_exceptions releases left outer join platform using(platform_id) left outer join feature_name using(feature_code) order version desc; ~~~ query 2 ------------------ ~~~ select feature_code, version, release_date, general_available, platform_id, uri, filesize, display_name, feature_name.full_name, coalesce(release_exceptions, 0) release_exceptions mus.releases left outer join ( select distinct feature_code, version, platform_id, 1 release_exceptions mus.release_exceptions ) release_exceptions using ...
Read more

unity3d - Unity local avoidance in user created world -

-
i'm using unity3d networked multiplayer online game have large complex 3d terrain scene forest, trees, cliff, hills, mountains, bounders, etc. players can build structures sort of minecraft, , put them anywhere in scene, or move them around anytime. aside human controlled players, there automated ai players , objects animals roaming around scene following path. the problem how make these automated ai players , animals, able navigate around static , dynamic player created structures, because path follow can blocked player created structures, or other players , other ai objects, cliffs etc. have find away around them or on track if tumble down off high cliff example. so made navmesh , used navagents, takes care of static, non moving objects, how make ai players navigate around each other , dynamic structures created players can number in hundreds? i thought of adding navmeshobstacle everything, result in being attached hundreds of objects since user created structures b...
Read more