Kvdb is a key-value data storage engine. Cross-Platform.

• Keys and values are char arrays.
• BTree data structure is used to store and retrieve data.
• Data are organized by databases and tables.
• A database is a directory on the filesystem which can contains tables. Tables are represented by folders inside the database directory.
• Data in tables are stored in binary file stream.

Examples

• to select a database testdb (if the database doesn't exist, it will be created)

  • selectdb /path/testdb

• to save data in a table students (if the table doesn't exist, it will be created)

  • testdb> students.put(id=1,firstname=Alice,lastname=Smith)

• to search rows from the table students

  • testdb> students.get(id=1) // will return all rows which contain this key and value from the table
    testdb> students.get() // will return all rows from the table
    testdb> students.get(key=value).order_by(key) // will return and sort rows by this key
    testdb> students.get(key=value).order_by(key=desc) // will return and sort rows in reverse order by this key

• to delete rows from a table

  • testdb> students.delete(key=value) // will delete all rows which contain this key and value
    testdb> students.delete() // will delete all rows from the table

• to load and process queries from a text file

  • testdb> queryload /path/dump.txt