`information_schema.statistics.seq_in_index`

mysql

type: BIGINT NOT NULL

5.7-8

type: NULL

Note:

The column sequence number, starting at 1.

5.1-10.8

type: BIGINT NOT NULL

Note:

The column sequence number, starting at 1.

type: BIGINT(2) NULL

Note:

The column number in the index, starting from 1.

4-6.1

type: unknown

Note:

Ordinal position of the column within the index (begins at 1).

1-21.2