Crate uls_query 

Query engine for FCC ULS data lookups.

This crate provides a high-level API for querying ULS license data. It wraps the database operations and provides convenient search and lookup methods with filtering and formatting support.

Example

use uls_query::{QueryEngine, SearchFilter};

fn main() -> Result<(), Box<dyn std::error::Error>> {
    let engine = QueryEngine::open("~/.uls/uls.db")?;
     
    // Quick callsign lookup
    if let Some(license) = engine.lookup("W1AW")? {
        println!("{} - {}", license.call_sign, license.display_name());
    }
     
    // Search by name
    let results = engine.search(SearchFilter::name("SMITH"))?;
    for license in results {
        println!("{}", license.call_sign);
    }
     
    Ok(())
}

Structs

FieldDef

Field definition with SQL column mapping.

FieldRegistry

Registry of all searchable/sortable fields.

FilterExpr

A single filter expression: field op value.

License

A complete license with all related information.

LicenseStats

Database statistics.

QueryEngine

Query engine for ULS data.

SearchFilter

Filter criteria for license searches.

Enums

FieldType

Field data types that determine allowed filter operations.

FilterOp

Comparison operators for filters.

OutputFormat

Supported output formats.

QueryError

Errors from query operations.

SortOrder

Sort order for search results.

Traits

FormatOutput

Trait for formatting output.