Function MaskImpl

be/src/exprs/mask-functions-ir.cc:281–291

Mask the whole given string. Ported from org.apache.hadoop.hive.ql.udf.generic.GenericUDFMask.

/// Mask the whole given string. Ported from
/// org.apache.hadoop.hive.ql.udf.generic.GenericUDFMask.
IR_ALWAYS_INLINE static inline StringVal MaskImpl(FunctionContext* ctx,
    const StringVal& val, int masked_upper_char, int masked_lower_char,
    int masked_digit_char, int masked_other_char) {
  if (val.is_null || val.len == 0) return val;
  if (!ctx->impl()->GetConstFnAttr(FunctionContextImpl::UTF8_MODE)) {
    return MaskSubStr(ctx, val, 0, val.len, masked_upper_char,
        masked_lower_char, masked_digit_char, masked_other_char);
  }
  return MaskSubStrUtf8(ctx, val, 0, val.len, masked_upper_char, masked_lower_char,
      masked_digit_char, masked_other_char);
}

static inline int GetNumDigits(int64_t val) {
  if (val == 0) return 1;