# Module ethcore::db [−] [src]

Database utilities and definitions.

## Enums

CacheUpdatePolicy | Modes for updating caches.

## Constants

COL_ACCOUNT_BLOOM | Column for Traces
COL_BODIES | Column for Block bodies
COL_EXTRA | Column for Extras
COL_HEADERS | Column for Block headers
COL_STATE | Column for State
COL_TRACE | Column for Traces
NUM_COLUMNS | Number of columns in DB

## Traits

Cache | A cache for arbitrary key-value pairs.
Key | Should be used to get database key associated with given value.
Readable | Should be used to read values from database.
Writable | Should be used to write value into database.

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