explode_split
description
表函数，需配合 Lateral View 使用。
将一个字符串按指定的分隔符分割成多个子串。
syntax
explode_split(str, delimiter)
example
原表数据：
mysql> select * from example1 order by k1;
+------+---------+
| k1 | k2 |
+------+---------+
| 1 | |
| 2 | NULL |
| 3 | , |
| 4 | 1 |
| 5 | 1,2,3 |
| 6 | a, b, c |
+------+---------+Lateral View:
mysql> select k1, e1 from example1 lateral view explode_split(k2, ',') tmp1 as e1 where k1 = 1 order by k1, e1;
+------+------+
| k1 | e1 |
+------+------+
| 1 | |
+------+------+
mysql> select k1, e1 from example1 lateral view explode_split(k2, ',') tmp1 as e1 where k1 = 2 order by k1, e1;
Empty set
mysql> select k1, e1 from example1 lateral view explode_split(k2, ',') tmp1 as e1 where k1 = 3 order by k1, e1;
+------+------+
| k1 | e1 |
+------+------+
| 3 | |
+------+------+
mysql> select k1, e1 from example1 lateral view explode_split(k2, ',') tmp1 as e1 where k1 = 4 order by k1, e1;
+------+------+
| k1 | e1 |
+------+------+
| 4 | 1 |
+------+------+
mysql> select k1, e1 from example1 lateral view explode_split(k2, ',') tmp1 as e1 where k1 = 5 order by k1, e1;
+------+------+
| k1 | e1 |
+------+------+
| 5 | 2 |
| 5 | 3 |
| 5 | 1 |
+------+------+
mysql> select k1, e1 from example1 lateral view explode_split(k2, ',') tmp1 as e1 where k1 = 6 order by k1, e1;
+------+------+
| k1 | e1 |
+------+------+
| 6 | b |
| 6 | c |
| 6 | a |
+------+------+keywords
explode,split,explode_split