Function SetDistinctEstimateBit

be/src/exprs/aggregate-functions-ir.cc:1512–1519

}

static inline void SetDistinctEstimateBit(uint8_t* bitmap,
    uint32_t row_index, uint32_t bit_index) {
  // We need to convert Bitmap[alpha,index] into the index of the string.
  // alpha tells which of the 32bit we've to jump to.
  // index then lead us to the byte and bit.
  uint32_t *int_bitmap = reinterpret_cast<uint32_t*>(bitmap);
  int_bitmap[row_index] |= (1 << bit_index);
}

static inline bool GetDistinctEstimateBit(uint8_t* bitmap,
    uint32_t row_index, uint32_t bit_index) {