Module db

Flags used when opening databases.

Structs

Flags

Flags used when opening databases.

Constants

CREATE

Create the named database if it doesn’t exist. This option is not allowed in a read-only environment.

DUPFIXED

This flag may only be used in combination with DUPSORT. This option tells the library that the data items for this database are all the same size, which allows further optimizations in storage and retrieval. When all data items are the same size, the get_multiple and next_multiple cursor operations may be used to retrieve multiple items at once.

DUPSORT

Duplicate keys may be used in the database. (Or, from another perspective, keys may have multiple data items, stored in sorted order.) By default keys must be unique and may have only a single data item.

INTEGERDUP

This option specifies that duplicate data items are binary integers, similar to INTEGERKEY keys.

INTEGERKEY

Keys are binary integers in native byte order, either libc::c_uint or libc::size_t, and will be sorted as such. The keys must all be of the same size.

REVERSEDUP

This option specifies that duplicate data items should be compared as strings in reverse order.

REVERSEKEY

Keys are strings to be compared in reverse order, from the end of the strings to the beginning. By default, Keys are treated as strings and compared from beginning to end.