Module logical_plan 

Logical plan representation for query execution.

This module defines LogicalPlan, which represents the logical structure of a query after parsing and semantic analysis. The logical plan is used by the executor to produce query results.

Plan Structure

Logical plans form a tree structure where:

• Leaf nodes are typically scans or DDL operations
• Internal nodes represent transformations (filter, sort, limit)
• DML operations (insert, update, delete) are also represented

Examples

use alopex_sql::planner::logical_plan::LogicalPlan;
use alopex_sql::planner::{Projection, TypedExpr, TypedExprKind, SortExpr};
use alopex_sql::planner::types::ResolvedType;
use alopex_sql::Span;

// SELECT * FROM users ORDER BY name LIMIT 10
let scan = LogicalPlan::Scan {
    table: "users".to_string(),
    projection: Projection::All(vec!["id".to_string(), "name".to_string()]),
};

let sort = LogicalPlan::Sort {
    input: Box::new(scan),
    order_by: vec![SortExpr::asc(TypedExpr::column_ref(
        "users".to_string(),
        "name".to_string(),
        1,
        ResolvedType::Text,
        Span::default(),
    ))],
};

let limit = LogicalPlan::Limit {
    input: Box::new(sort),
    limit: Some(10),
    offset: None,
};

Enums

LogicalPlan

Logical query plan representation.