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