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use indexmap::IndexSet;
use toasty_core::stmt;
use crate::engine::{exec, mir};
/// Executes a SQL statement against the database.
///
/// Used with SQL-capable drivers to delegate query execution to the database's
/// query engine. The statement may reference inputs from other nodes.
#[derive(Debug)]
pub(crate) struct ExecStatement {
/// Nodes whose outputs are passed as arguments to the statement.
pub(crate) inputs: IndexSet<mir::NodeId>,
/// The SQL statement to execute.
pub(crate) stmt: stmt::Statement,
/// The return type of this operation.
pub(crate) ty: stmt::Type,
/// How this statement's output is interpreted. For a conditional write the
/// statement's leading two columns are probe counts checked against each
/// other; see [`exec::ConditionalOutput`].
pub(crate) conditional: exec::ConditionalOutput,
/// Pagination configuration (None if not paginated)
pub(crate) pagination: Option<exec::PaginationConfig>,
}
impl From<ExecStatement> for mir::Node {
fn from(value: ExecStatement) -> Self {
debug_assert!(
{
match &value.stmt {
stmt::Statement::Query(query) => !query.single,
_ => true,
}
},
"as of now, no database can execute single queries"
);
mir::Operation::ExecStatement(Box::new(value)).into()
}
}