ocaml re-migration

1 files changed, 0 insertions, 326 deletions

diff --git a/src/repl.erl b/src/repl.erl
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-%%% @doc Interactive REPL Helper for Sakura Query Planner
-%%%
-%%% Provides convenience functions for working with the query planner
-%%% in the Erlang shell (REPL). Includes utilities for pretty-printing
-%%% results and working with prepared statements.
-%%%
-%%% == Quick Start ==
-%%% <pre>
-%%% % Start the system
-%%% repl:start().
-%%%
-%%% % Create a database with sample data
-%%% DB = repl:example_db().
-%%%
-%%% % Execute a query
-%%% repl:q(DB, {select, {relation, employees}, fun(T) -&gt; maps:get(age, T) &gt; 30 end}).
-%%%
-%%% % Explain a query plan
-%%% repl:explain({project, {relation, employees}, [name, age]}).
-%%% </pre>
-%%%
-%%% == Query Syntax Examples ==
-%%% <pre>
-%%% % Base relation (just use the name)
-%%% employees
-%%%
-%%% % Filter
-%%% {select, employees, fun(T) -&gt; maps:get(age, T) &gt; 30 end}
-%%%
-%%% % Project
-%%% {project, employees, [name, age]}
-%%%
-%%% % Join
-%%% {join, employees, departments, dept_id}
-%%%
-%%% % Rename
-%%% {rename, age, years, employees}
-%%%
-%%% % Complex pipeline
-%%% {take,
-%%%   {sort,
-%%%     {project,
-%%%       {select,
-%%%         {join, employees, departments, dept_id},
-%%%         fun(T) -&gt; maps:get(age, T) &gt; 30 end},
-%%%       [name, dept_name, age]},
-%%%     fun(A, B) -&gt; maps:get(age, A) =&lt; maps:get(age, B) end},
-%%%   5}
-%%% </pre>
-%%%
-%%% @author Nekoma Team
-%%% @copyright 2025
-
--module(repl).
-
--export([start/0,
-         example_db/0,
-         q/2,
-         q/3,
-         query/2,
-         show/1,
-         show/2,
-         explain/1,
-         pretty/1,
-         modes/0,
-         help/0]).
-
--include("operations.hrl").
-
-%%% Public API
-
-%% @doc Start the Sakura system and initialize Mnesia.
-%%
-%% Call this first when starting a new REPL session.
-%%
-%% @returns ok
--spec start() -> ok.
-start() ->
-    main:setup(),
-    io:format("~n~s~n", [banner()]),
-    io:format("Sakura REPL started. Type repl:help() for usage.~n~n"),
-    ok.
-
-%% @doc Create an example database with sample data.
-%%
-%% Creates a database with employees and departments relations
-%% for testing and experimentation.
-%%
-%% @returns Database state
--spec example_db() -> term().
-example_db() ->
-    DB = operations:create_database(example_db),
-
-    % Create employees relation
-    {DB1, _} = operations:create_relation(DB, employees, #{
-        id => integer,
-        name => string,
-        dept_id => integer,
-        age => integer,
-        salary => integer
-    }),
-
-    {DB2, _} = operations:create_tuple(DB1, employees, #{id => 1, name => "Alice", dept_id => 10, age => 30, salary => 80000}),
-    {DB3, _} = operations:create_tuple(DB2, employees, #{id => 2, name => "Bob", dept_id => 20, age => 35, salary => 90000}),
-    {DB4, _} = operations:create_tuple(DB3, employees, #{id => 3, name => "Carol", dept_id => 10, age => 28, salary => 75000}),
-    {DB5, _} = operations:create_tuple(DB4, employees, #{id => 4, name => "Dave", dept_id => 30, age => 42, salary => 95000}),
-    {DB6, _} = operations:create_tuple(DB5, employees, #{id => 5, name => "Eve", dept_id => 20, age => 25, salary => 70000}),
-
-    % Create departments relation
-    {DB7, _} = operations:create_relation(DB6, departments, #{
-        dept_id => integer,
-        dept_name => string,
-        budget => integer
-    }),
-
-    {DB8, _} = operations:create_tuple(DB7, departments, #{dept_id => 10, dept_name => "Engineering", budget => 100000}),
-    {DB9, _} = operations:create_tuple(DB8, departments, #{dept_id => 20, dept_name => "Sales", budget => 80000}),
-    {DB10, _} = operations:create_tuple(DB9, departments, #{dept_id => 30, dept_name => "Marketing", budget => 90000}),
-
-    %% Note: natural, integer, rational, and boolean are now built-in to every database
-
-    io:format("Example database created with:~n"),
-    io:format("  - employees (5 tuples)~n"),
-    io:format("  - departments (3 tuples)~n"),
-    io:format("  - Built-in immutable relations: boolean, natural, integer, rational~n~n"),
-
-    DB10.
-
-%% @doc Execute a query and pretty-print results (default table mode).
-%%
-%% Convenience function that prepares, executes, and displays
-%% query results in a readable format. Returns `ok' to avoid
-%% duplicate output in the Erlang shell.
-%%
-%% If you need the results for further processing, use `query/2'.
-%%
-%% @param DB Database state
-%% @param Plan Query plan tuple
-%% @returns ok
--spec q(term(), query_planner:query_plan()) -> ok.
-q(DB, Plan) ->
-    q(DB, Plan, table).
-
-%% @doc Execute a query with specified visualization mode.
-%%
-%% Displays query results using the specified visualization mode.
-%% Returns `ok' to avoid duplicate output in the Erlang shell.
-%%
-%% If you need the results for further processing, use `query/2'.
-%%
-%% @param DB Database state
-%% @param Plan Query plan tuple
-%% @param Mode Visualization mode (table, tree, nested_table, etc.)
-%% @returns ok
--spec q(term(), query_planner:query_plan(), visualizer:render_mode()) -> ok.
-q(DB, Plan, Mode) ->
-    PreparedPlan = query_planner:prepare(Plan),
-    Results = query_planner:collect(DB, PreparedPlan),
-    visualizer:render(Results, Mode).
-
-%% @doc Execute a query without printing results.
-%%
-%% This function executes a query and returns the raw results without
-%% any visualization. Use this when you want to work with the results
-%% programmatically or decide later how to display them.
-%%
-%% @param DB Database state
-%% @param Plan Query plan tuple
-%% @returns List of result tuples
-%%
-%% == Example ==
-%% <pre>
-%% Results = repl:query(DB, {scan, employees}).
-%% FilteredResults = lists:filter(fun(T) -&gt; maps:get(age, T) &gt; 30 end, Results).
-%% repl:show(FilteredResults, tree).
-%% </pre>
--spec query(term(), query_planner:query_plan()) -> [map()].
-query(DB, Plan) ->
-    PreparedPlan = query_planner:prepare(Plan),
-    query_planner:collect(DB, PreparedPlan).
-
-%% @doc Display results using default visualization mode (table).
-%%
-%% Takes a list of tuples (e.g., from query/2) and displays them
-%% using the table visualization mode.
-%%
-%% @param Results List of result tuples
-%% @returns ok
--spec show([map()]) -> ok.
-show(Results) ->
-    show(Results, table).
-
-%% @doc Display results using specified visualization mode.
-%%
-%% Takes a list of tuples (e.g., from query/2) and displays them
-%% using the specified visualization mode.
-%%
-%% @param Results List of result tuples
-%% @param Mode Visualization mode (table, tree, nested_table, etc.)
-%% @returns ok
-%%
-%% == Example ==
-%% <pre>
-%% Results = repl:query(DB, {scan, employees}),
-%% repl:show(Results, tree).
-%% </pre>
--spec show([map()], visualizer:render_mode()) -> ok.
-show(Results, Mode) ->
-    visualizer:render(Results, Mode).
-
-%% @doc Explain a query plan.
-%%
-%% Displays the query execution plan in a readable tree format.
-%%
-%% @param Plan Query plan tuple
-%% @returns ok
--spec explain(query_planner:query_plan()) -> ok.
-explain(Plan) ->
-    Explanation = query_planner:explain(Plan),
-    io:format("~nQuery Plan:~n~s~n", [Explanation]),
-    ok.
-
-%% @doc List available visualization modes.
-%%
-%% @returns List of available render modes
--spec modes() -> [visualizer:render_mode()].
-modes() ->
-    visualizer:modes().
-
-%% @doc Pretty-print a list of tuples.
-%%
-%% Displays tuples using the visualizer module (default table mode).
-%%
-%% @param Results List of result tuples
-%% @returns ok
--spec pretty([map()]) -> ok.
-pretty(Results) ->
-    visualizer:render(Results, table).
-
-%% @doc Display help message with query examples.
-%%
-%% @returns ok
--spec help() -> ok.
-help() ->
-    io:format("~n~s~n~n", [banner()]),
-    io:format("Sakura Query REPL - Lisp-inspired tuple-based query language~n~n"),
-    io:format("Quick Start:~n"),
-    io:format("  repl:start().                  %% Initialize system~n"),
-    io:format("  DB = repl:example_db().        %% Create example database~n"),
-    io:format("  repl:q(DB, employees).         %% Run a query~n~n"),
-
-    io:format("Query Operators (all lazy by default):~n"),
-    io:format("  RelationName                              - Base relation~n"),
-    io:format("  {select, Plan, Predicate}                 - Filter tuples~n"),
-    io:format("  {project, Plan, [Attrs]}                  - Project attributes~n"),
-    io:format("  {join, Left, Right, Attr}                 - Equijoin~n"),
-    io:format("  {theta_join, Left, Right, Predicate}      - Theta join~n"),
-    io:format("  {sort, Plan, Comparator}                  - Sort tuples~n"),
-    io:format("  {take, Plan, N}                           - Limit results~n"),
-    io:format("  {rename, OldAttr, NewAttr, Plan}          - Rename attribute~n"),
-    io:format("  {materialize, Plan}                       - Force evaluation (all)~n"),
-    io:format("  {materialize, Plan, N}                    - Force evaluation (N tuples)~n~n"),
-
-    io:format("Lazy vs Eager:~n"),
-    io:format("  All operators return lazy iterators (relations)~n"),
-    io:format("  Use 'materialize' to force eager evaluation~n"),
-    io:format("  Materialize can be nested anywhere in the query~n~n"),
-
-    io:format("Query Execution:~n"),
-    io:format("  repl:q(DB, Plan)           - Execute and display (returns ok)~n"),
-    io:format("  repl:q(DB, Plan, Mode)     - Execute and display with mode (returns ok)~n"),
-    io:format("  repl:query(DB, Plan)       - Execute without display (returns results)~n"),
-    io:format("  repl:show(Results)         - Display results (returns ok)~n"),
-    io:format("  repl:show(Results, Mode)   - Display results with mode (returns ok)~n~n"),
-
-    io:format("Visualization Modes:~n"),
-    io:format("  Modes: table, tree, nested_table, linked_tables, outline~n"),
-    io:format("  repl:modes() - List all available modes~n~n"),
-
-    io:format("Examples:~n"),
-    io:format("  %% Query all employees~n"),
-    io:format("  repl:q(DB, employees).~n~n"),
-
-    io:format("  %% Filter employees over 30~n"),
-    io:format("  repl:q(DB, {select, employees, ~n"),
-    io:format("              fun(T) -> maps:get(age, T) > 30 end}).~n~n"),
-
-    io:format("  %% Project name and age~n"),
-    io:format("  repl:q(DB, {project, employees, [name, age]}).~n~n"),
-
-    io:format("  %% Join employees with departments~n"),
-    io:format("  repl:q(DB, {join, employees, departments, dept_id}).~n~n"),
-
-    io:format("  %% Rename age to years~n"),
-    io:format("  repl:q(DB, {rename, age, years, employees}).~n~n"),
-
-    io:format("  %% Materialize first 10 tuples (eager evaluation)~n"),
-    io:format("  repl:q(DB, {materialize, employees, 10}).~n~n"),
-
-    io:format("  %% Nested materialize - select from materialized data~n"),
-    io:format("  repl:q(DB, {select, {materialize, employees},~n"),
-    io:format("              fun(T) -> maps:get(age, T) > 30 end}).~n~n"),
-
-    io:format("  %% Use different visualization modes~n"),
-    io:format("  repl:q(DB, employees, tree).~n"),
-    io:format("  repl:q(DB, employees, nested_table).~n"),
-    io:format("  repl:q(DB, employees, outline).~n~n"),
-
-    io:format("  %% Query without printing, then show results~n"),
-    io:format("  Results = repl:query(DB, employees).~n"),
-    io:format("  Filtered = lists:filter(fun(T) -> maps:get(age, T) > 30 end, Results).~n"),
-    io:format("  repl:show(Filtered, tree).~n~n"),
-
-    io:format("  %% Explain a query plan~n"),
-    io:format("  repl:explain({select, employees, ~n"),
-    io:format("                fun(T) -> maps:get(age, T) > 30 end}).~n~n"),
-
-    ok.
-
-%%% Internal Functions
-
-banner() ->
-    "========================================\n"
-    "  Sakura - Extended Relational DB\n"
-    "  Tasmania / RM/T Implementation\n"
-    "========================================".