postgre sql 累計和 hive sql

postgre sql 累計和 hive sql

sql功能

Hive
length ，split的用法

# 類似 hive split的函數，自己定義的
create or replace function ypl_str2Array(
in _originStr VARCHAR(800),
in _delimeter VARCHAR(10)
) RETURNS VARCHAR(800)[]
as $$
declare _strres varchar(800);
declare _cindex INTEGER;
declare _arrIndex INTEGER;
DECLARE _arr_str VARCHAR(800)[];
DECLARE _tmp_str varchar(800);
DECLARE _debugStr VARCHAR(400);
BEGIN
_arrIndex:=1;
_strres:='';
_cindex:=1;
 
 
if _delimeter is NULL or "character_length"(_debugStr)<1 THEN
return _arr_str;
end IF;
--_strres:=_strres||'原始字符串是：'||_originStr;
while _cindex<"length"(_originStr) loop
--_strres :=_strres||'【這個是什麼？】'||split_part(_originStr, _delimeter, _arrIndex);
_tmp_str:=split_part(_originStr, _delimeter, _arrIndex);
 if "character_length"(_tmp_str)<1 then
exit;
end if;
_arr_str:=_arr_str|| _tmp_str;
_arrIndex:=_arrIndex+1;
END loop;
return _arr_str;
end;
$$ LANGUAGE plpgsql volatile;

SELECT  count(1)
	FROM model_part.t_model_part_output where batch_no = '20200428' 
	and  cardinality(ypl_str2Array(domain,'.')) >2 and  limit 100;
SELECT  count(1)
	FROM model_part.t_model_part_output where batch_no = '20200428' 
	and  cardinality(string_to_array(domain,'.')) >2 and  limit 100;