TablaM: A practical relational language
mamcx (11)

P.D: The team repl is at https://repl.it/@TablaM/RelpIt (exact as the one here). The user interface not allow to point to this?

Is a pleasure for me (Mario) & my friend (Sebastian) to present our entry for this contest.

We are the team @TablaM

I start programming in the 1990s with FoxPro, a full-stack programming environment (at that time we don't use cool names like "full-stack") where was natural to use databases... and it was VERY productive.

You can do ALL (forms, reports, databases, utilities, etc) with a single language & environment.

Microsoft, in a very weird move, kill it together with Visual Basic (shocking because was the MOST popular lang at the time) when it try to move all to .NET. So everyone jumps off the ship and the only remanent of the idea is today represented by Access and a few other tools, nearly all proprietary, stuck in the past or in pieces of what kid this days call "NoSql/BigData", that have a higher complexity.

Now, after using more than 12+ languages and more frameworks and libraries that I can count, I wanna get back that experience: A tool tailored for data, where data is as important as code and the way to use it don't require ORMs or others tools that cause the well know impedance mismatch.

This means that were most languages are focused on low-level details or engineering at large, TablaM will be tailored with some small & big design decisions to make it enjoyable to write applications for e-commerce, finance, ERPs, and similars.

The most distinctive feature of the language is the use of the relational model as the base for its operation. This allows us to provide a set of universal and consistent operations that make it easier to manipulate data.

For example, where most languages have different methods to "query" items (sometimes called find, other times get or search or filter or ...), meaning you need to learn all different ways that change according to the context or kind of value you are using, in TablaM is just ?where, and ALL values, even files, databases, sockets, values, numbers, text, etc... can be queried with the same set of operators. And you don't need to code them, because are universally available.

A small taste of the language as planned (what work today is in the docs):

-- A column, aka: Vectors...
let qty := [10.5, 4.0, 3.0] 

-- Like APL/kdb+ operations apply to more than scalars
qty * 16.0 
-- Show: Vec[it:Dec; 168.00; 64.00; 48.00]

-- The ? (query) operator allow to do SQL-like queries to anything
let doubled := qty ?select #0 * 2.0 

-- like files!
let products := open("products.csv")

-- and is streamed, so can query big ones
for p in products ?where #price > 0.0 do
    print(p)
end

-- so, we can do joins between anything:
for p in cross(products, qty) ?limit 10 do
	print(p.products.price * p.qty)
end

-- No nulls, we have proper algebraic types
type Status = case Pay, NotPay end

-- Use databases:
use db.sqlite
let db := sqlite.open("data.db")

for sale in db.invoices ?status = Status.Pay do
	print(sale)
end

So, what kind of language is TablaM?

Note: Items marked (tbd) are in the roadmap...

  • Build on the high-performance Rust language.
  • Available to major 64-bit platforms (Linux, Windows, MacOS, iOS (tbd), Android (tbd)).
  • Easy to embed in another languages, similar to Lua. (tbd)
  • Multi-paradigm, but strongly based on the relational model. Also provide functional, array & imperative capabilities.
  • Immutable values are the default, but allow mutable ones.
  • Null safe.
  • Provide decimal math as the default, instead of binary floating-point, making it better for business applications.
  • Provide date types as primitives type, instead of using some external libraries (or ugly built-in library) to operate it.
  • Provide Algebraic Data Types (tbd).
  • Provide SQL/LINQ-like experience across any relation. Like other languages say "anything is an object", in TablaM, "*anything is a relation*".
  • Built-in support for a variety of protocols, formats, and data transformation (tbd).
  • No needs for ORMs. Talk directly to major RDBMS/SQL databases (PostgreSQL, MySql, SQL Server, SQLite) (tbd).

We have prepare this material for this contest:

Oficial Site

Tutorial

Syntax

Initial relational operators

Small standard library

Run on Relp.It

Video (in Spanish with subtitles in English, we are from Colombia :colombia: !)

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mamcx (11)

@TheDrone7 No, the UI only shows my personal repls. I pick the one it showed assuming it was ok... The one for the team not show at all...