LMDB

Empty or delete+close a database.

If parameter delete is false DB will be emptied, otherwise DB will be deleted from the environment and DB handle will be closed

Close a cursor

Close a database handle

Close the environment and release the memory map

Return count of duplicates for current key

Delete items from a database

Delete current key/data pair to which the cursor refers

Retrieve by cursor.

This function retrieves key/data pairs from the database.

Get items from a database

Get environment flags and parameters

getindex accepts folowing parameters:

• env db environment object
• option symbol which indicates parameter. Currently supported parameters:
  • Flags
  • Readers
  • KeySize

Note: Consult LMDB documentation for particual values of environment parameters and flags.

Check if cursor is open

Check if database is open

Check if environment is open

Check if transaction is open.

Return iterator over keys of uniform, specified type

Wrapper of DBI open for do construct

Open a database in the environment

Open an environment handle

open function accepts folowing parameters:

• env db environment object
• path directory in which the database files reside
• flags defines special options for the environment
• mode UNIX permissions to set on created files

Note: A database directory must exist and be writable.

Wrapper of Cursor open for do construct

Create a cursor

Store by cursor.

This function stores key/data pairs into the database. The cursor is positioned at the new item, or on failure usually near it.

Store items into a database

Reset a read-only transaction

Abort the transaction like abort, but keep the transaction handle.

Set environment flags and parameters

setindex! accepts folowing parameters:

• env db environment object
• option symbol which indicates parameter. Currently supported parameters:
  • Flags
  • Readers
  • MapSize
  • DBs
• value parameter value

Note: Consult LMDB documentation for particual values of environment parameters and flags.

Abandon all the operations of the transaction instead of saving them

The transaction and its cursors must not be used after, because its handle is freed.

Commit all the operations of a transaction into the database

The transaction and its cursors must not be used after, because its handle is freed.

Wrapper of create for do construct

Create an LMDB environment handle

Return the cursor's database

Wrapper of open for do construct

Return information about the LMDB environment.

Check if binary flag is set in provided value

Return the path that was used in open

Renew a cursor

Renew a read-only transaction

This acquires a new reader lock for a transaction handle that had been released by reset. It must be called before a reset transaction may be used again.

Set environment flags

Create a transaction for use with the environment

start function creates a new transaction and returns Transaction object. It allows to set transaction flags with flags option.

Flush the data buffers to disk

Return the cursor's transaction

Unset environment flags

A handle to a cursor structure for navigating through a database.

A handle for an individual database in the DB environment.

A DB environment supports multiple databases, all residing in the same shared-memory map.

LMDB exception type

A database transaction. Every operation requires a transaction handle. All database operations require a transaction handle. Transactions may be read-only or read-write.

Iterate over database

Return a string describing a given error code

Function returns description of the error as a string. It accepts following arguments:

• err::Int32: An error code.

Retrieve the DB flags for a database handle

Return the LMDB library version and version information

Function returns tuple (VersionNumber, String) that contains a library version and a library version string.

Type to implement the Iterator interface