array_enumerate
array_enumerate
array_enumerate
description
Syntax
ARRAY<T> array_enumerate(ARRAY<T> arr)
返回数组下标, 例如 [1, 2, 3, …, length (arr) ]
example
mysql> create table array_type_table(k1 INT, k2 Array<STRING>) duplicate key (k1)
-> distributed by hash(k1) buckets 1 properties('replication_num' = '1');
mysql> insert into array_type_table values (0, []), ("1", [NULL]), ("2", ["1", "2", "3"]), ("3", ["1", NULL, "3"]), ("4", NULL);
mysql> set enable_vectorized_engine = true; # enable vectorized engine
mysql> select k2, array_enumerate(k2) from array_type_table;
+------------------+-----------------------+
| k2 | array_enumerate(`k2`) |
+------------------+-----------------------+
| [] | [] |
| [NULL] | [1] |
| ['1', '2', '3'] | [1, 2, 3] |
| ['1', NULL, '3'] | [1, 2, 3] |
| NULL | NULL |
+------------------+-----------------------+
5 rows in set (0.01 sec)
keywords
ARRAY,ENUMERATE,ARRAY_ENUMERATE
