Method cur_expr_values_null

be/src/exec/hash-table.h:361–361

    /// These are uint8_t instead of bool to simplify codegen with IRBuilder.
    /// TODO: is there actually a valid reason why this is necessary for codegen?
    uint8_t* ALWAYS_INLINE cur_expr_values_null() const { return cur_expr_values_null_; }

    /// Returns the offset into the results buffer of the expression value at 'expr_idx'.
    int ALWAYS_INLINE expr_values_offsets(int expr_idx) const {