1//! Shared lint helper utilities. 2 3use sqlparser::ast::*; 4 5/// Returns true if the expression is a NULL literal. 6pub fn is_null_expr(expr: &Expr) -> bool { 7 matches!( 8 expr, 9 Expr::Value(ValueWithSpan { 10 value: Value::Null, 11 .. 12 }) 13 ) 14}