Simple client-server non-relational database

Internal structure consists of two red black trees and one std::unordered_map

git clone https://github.com/Cub1tor/database.git
cd database

make
# or
make all

# to remove build files use
make clean

./server
./client {Address} {Port}
# for example
./client localhost 8080

• exit - stop server

• INSERT name=STRING group=INT rating=DOUBLE info=STRING END
• UPDATE {name=STRING group=INT rating=DOUBLE info=STRING} WHERE {Criteria} END
• DELETE {Criteria} END
• SELECT {Criteria} END
• RESELECT {Criteria} END
• PRINT <count=INT> {name group rating *} SORT {ASC|DESC} {name group rating} END
• LOAD file=FILENAME END
• DUMP file=FILENAME END

Criteria

• list of Entries connected by AND|OR

Entry

• key=list of Values divided by ','

Keys

• name
• group
• rating

Values

• value → equal
• regex with asterisks → * is any sequence of symbols, only for name
• *-value → less or equal, only for group and rating
• value-* → more or equal, only for group and rating
• value1-value2 → between, only for group and rating

INSERT name="Cub1tor" group=204 rating=4.37 info="C++ programmer" END
UPDATE name=Cub1tor rating=4.37 info="C++ programmer" WHERE name=Cub* AND group=204 END
DELETE group=210 END
SELECT * END
RESELECT rating=4.2-5 END
PRINT count=10 name group SORT DESC group END
PRINT count=5 * SORT ASC group name rating END
LOAD file=load.json END
DUMP file=dump.json END