SimpleDB

This is a project to develop SimpleDB in Rust.

text: Database Design and Implementation: Second Edition

Demo movie

[youtube]: https://www.youtube.com/watch?v=vr0wQq7cvHQ

Status

Done to implement all of book contents, but any exercise.

Build

You need to install capnproto for building this project.

sudo apt install capnproto

cargo build

How to run on embedded version

How to connect and run sql for a database named dbname on embedded version is like below.

cargo run --bin esql -- -d <dbname>

How to run on server/client version

How to run simpledb-server.

cargo run --bin simpledb-server

How to run sql as simpledb client program.

cargo run --bin sql -- -d <dbname>

Benchmarking & Visualize

take benchmarking data.

./benchmarks.sh

and then run http-server. You must install http-server on npm, if you view the results on your local.

cd benchmarks
http-server -p 3000

and then open browser http://localhost:3000?scale=tiny. At this url, query parameter scale can has tiny/small/medium/large.

Query tips

use rlwrap in order to edit query prettier.

$ rlwrap cargo run --bin esql -- -d <dbname>

check table catalogs.

SQL> :t tblcat
* table: tblcat has 2 fields.

#   name             type
--------------------------------------
   1 tblname          varchar(16)
   2 slotsize         integer

SQL> SELECT tblname FROM tblcat;
tblname
------------------
tblcat
fldcat
viewcat
idxcat
student
dept
course
section
enroll
sex
transaction 6 committed
Rows 10 (0.000s)

SQL>

check field catalogs.

SQL> :t fldcat
* table: fldcat has 5 fields.

#   name             type
--------------------------------------
   1 tblname          varchar(16)
   2 fldname          varchar(16)
   3 type             integer
   4 length           integer
   5 offset           integer

SQL> SELECT tblname, fldname, type, length FROM fldcat;
tblname           fldname           type    length
----------------------------------------------------
...
student           sid                     2       0
student           sname                   3      10
student           grad_year               1       0
student           major_id                2       0
student           birth                   5       0
student           sex                     4       0
transaction 9 committed
Rows 33 (0.001s)

check view catalog

SQL> SELECT viewname, viewdef FROM viewcat;
viewname          viewdef
------------------------------------------------------------------------------------------------------------------------
einstein          select sect_id from section where prof='einstein'
transaction 3 committed
Rows 1 (0.000s)

SQL>

Benchmark results

• tiny
• small
• medium