Single logical partitions

You can run CHECK INDEX on a single logical partition of a secondary index. However, what CHECK INDEX can detect is limited.

CHECK INDEX does not detect duplicate unique keys in different logical partitions. For example, logical partition 1 might have the following keys:
```
A  B  E  F  T  Z
```
Logical partition 2 might have the following keys:
```
M  N  Q  T  V  X
```
In this example, the keys are unique within each logical partition, but both logical partitions contain the key, T; so for the index as a whole, the keys are not unique. CHECK INDEX does not detect the duplicates.
CHECK INDEX does not detect keys that are out of sequence between different logical partitions. For example, the following keys are out of sequence:
```
1  7  5  8  9  10  12
```
If keys 1, 5, 9, and 12 belong to logical partition 1 and keys 7, 8, and 10 belong to logical partition 2, the keys within each partition are in sequence, but the keys for the index, as a whole, are out of sequence, as shown in the following example:
```
LP 1   1     5     9      12 LP 2   7     8     10
```
When checking a single logical partition, CHECK INDEX does not detect this out-of-sequence condition.