Struct Executor 

pub struct Executor<'a> { /* private fields */ }

Query executor.

Implementations

impl<'a> Executor<'a>

pub fn new(directives: &'a [Directive]) -> Self

Create a new executor with the given directives.

pub fn set_target_currency(&mut self, currency: impl Into<String>)

Set the target currency for VALUE() conversions.

pub fn execute(&mut self, query: &Query) -> Result<QueryResult, QueryError>

Execute a query and return the results.

Errors

Returns QueryError in the following cases:

• QueryError::UnknownColumn - A referenced column name doesn’t exist
• QueryError::UnknownFunction - An unknown function is called
• QueryError::InvalidArguments - Function called with wrong arguments
• QueryError::Type - Type mismatch in expression (e.g., comparing string to number)
• QueryError::Aggregation - Error in aggregate function (SUM, COUNT, etc.)
• QueryError::Evaluation - General expression evaluation error