lix 0.15.0

Embeddable version control for apps and AI agents.
Documentation 
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use datafusion::sql::parser::Statement as DataFusionStatement;
use datafusion::sql::sqlparser::ast::Query;

use crate::LixError;

#[derive(Clone, Debug, Eq, PartialEq)]
pub(crate) struct BoundRead {
    pub(crate) query: Box<Query>,
}

#[derive(Clone, Copy, Debug, Eq, PartialEq)]
pub(crate) enum BoundStatementRoute {
    Read,
    Write,
}

pub(crate) fn bind_statement_route(
    statement: &DataFusionStatement,
) -> Result<BoundStatementRoute, LixError> {
    if super::super::checkpoint_function_plan(statement)?.is_some() {
        return Ok(BoundStatementRoute::Write);
    }
    match super::classify::classify_datafusion_statement(statement) {
        super::classify::SqlStatementKind::Read => Ok(BoundStatementRoute::Read),
        super::classify::SqlStatementKind::Write => Ok(BoundStatementRoute::Write),
        super::classify::SqlStatementKind::Other => Err(LixError::new(
            LixError::CODE_UNSUPPORTED_SQL,
            "SQL statement is not supported by Lix SQL",
        )),
    }
}

pub(crate) fn bind_read_statement(
    _sql: &str,
    statement: &DataFusionStatement,
) -> Result<(), LixError> {
    if bind_statement_route(statement)? == BoundStatementRoute::Write {
        return Err(LixError::new(
            LixError::CODE_UNSUPPORTED_SQL,
            "SQL writes must use the bound write planning path",
        ));
    }
    super::classify::validate_supported_datafusion_statement_ast(statement)?;
    super::public_udf::validate_public_udf_calls_in_datafusion_statement(statement)?;
    Ok(())
}