checking schema present or not by passing schema name as parameter

i am checking if schema present or not and passing schema name dynamically
but it's trowing an error :

CREATE OR REPLACE FUNCTION chkschema(schemaname text)
RETURNS boolean AS
$BODY$
DECLARE
i boolean;
BEGIN

EXECUTE 'SELECT exists(select schema_name FROM information_schema.schemata
WHERE schema_name = '||quote_ident(schemaname)||')'
INTO i ;

IF i THEN

return i;
else

return i;
end if;

end;
$BODY$
LANGUAGE plpgsql

ERROR: column "secc_master" does not exist
LINE 1: ...M information_schema.schemata WHERE schema_name = secc_maste...
^

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