Method starts_with_show

src/sql-parser/src/ast/defs/query.rs:140–146

Whether the rendered SQL for this body begins with `SHOW` (i.e. its leftmost leaf is a `Show`). Such a body must be parenthesized when it is a statement's query, because a top-level leading `SHOW` is dispatched as a `Statement::Show` and would swallow any following set operator.

(&self)

    /// a statement's query, because a top-level leading `SHOW` is dispatched as
    /// a `Statement::Show` and would swallow any following set operator.
    pub fn starts_with_show(&self) -> bool {
        match self {
            SetExpr::Show(_) => true,
            SetExpr::SetOperation { left, .. } => left.starts_with_show(),
            _ => false,
        }
    }
}

impl<T: AstInfo> AstDisplay for SetExpr<T> {