static int mtime_decimal(const ObObjCastParams ¶ms, const ObExprObj &in, ObExprObj &out) { UNUSED(params); OB_ASSERT(in.get_type() == ObModifyTimeType); ObNumber num; num.from(static_cast<int64_t> (in.get_mtime())); out.set_decimal(num); return OB_SUCCESS; }
static int int_decimal(const ObObjCastParams ¶ms, const ObExprObj &in, ObExprObj &out) { UNUSED(params); OB_ASSERT(in.get_type() == ObIntType); ObNumber num; num.from(in.get_int()); out.set_decimal(num); // @todo optimize return OB_SUCCESS; }
int ObObj::get_decimal(ObNumber &num, bool &is_add) const { int ret = OB_OBJ_TYPE_ERROR; if (ObDecimalType == meta_.type_) { ret = OB_SUCCESS; is_add = (ADD == meta_.op_flag_); int8_t nwords = static_cast<int8_t>(meta_.dec_nwords_ + 1); int8_t vscale = meta_.dec_vscale_; if (nwords <= 3) { num.from(vscale, nwords, reinterpret_cast<const uint32_t*>(&val_len_)); } else { num.from(vscale, nwords, value_.dec_words_); } } return ret; }
static int varchar_decimal(const ObObjCastParams ¶ms, const ObExprObj &in, ObExprObj &out) { int ret = OB_SUCCESS; UNUSED(params); OB_ASSERT(in.get_type() == ObVarcharType); const string &varchar = in.get_varchar(); ObNumber num; if (OB_SUCCESS != (ret = num.from(varchar.data(), varchar.length()))) { jlog(WARNING, "failed to convert varchar to decimal, err=%d varchar=%.*s", ret, varchar.length(), varchar.data()); } else { out.set_decimal(num); // @todo optimize } return OB_SUCCESS; }
static int double_decimal(const ObObjCastParams ¶ms, const ObExprObj &in, ObExprObj &out) { int ret = OB_SUCCESS; UNUSED(params); OB_ASSERT(in.get_type() == ObDoubleType); static const int64_t MAX_DOUBLE_PRINT_SIZE = 64; char buf[MAX_DOUBLE_PRINT_SIZE]; snprintf(buf, MAX_DOUBLE_PRINT_SIZE, "%f", in.get_double()); ObNumber num; if (OB_SUCCESS != (ret = num.from(buf))) { jlog(WARNING, "failed to convert float to decimal, err=%d", ret); } else { out.set_decimal(num); } return ret; }
void ObNumber::knuth_div_unsigned(const uint32_t *dividend, const ObNumber &divisor, ObNumber "ient, int8_t qidx, ObNumber &remainder) { OB_ASSERT(divisor.words_[divisor.nwords_ - 1] >= HALF_BASE); // (BASE ^ divisor_n)/2 <= divisor OB_ASSERT(0 <= qidx && qidx < MAX_NWORDS); ObNumber cdividend; cdividend.nwords_ = static_cast<int8_t> (divisor.nwords_ + 1); for (int8_t i = 0; i < cdividend.nwords_; ++i) { cdividend.words_[i] = dividend[i]; } ObNumber base; base.from(BASE); ObNumber p; mul_words(base, divisor, p); p.remove_leading_zeroes_unsigned(); int cmp = compare_words_unsigned(cdividend, p); if (cmp >= 0) { sub_words_unsigned(cdividend, p, cdividend); knuth_div_unsigned(cdividend.words_, divisor, quotient, qidx, remainder); // recursively called at most once quotient.words_[qidx + 1] = 1; } else { int8_t n = divisor.nwords_; uint64_t q = (UBASE * dividend[n] + dividend[n - 1]) / divisor.words_[n - 1]; if (q >= UBASE) { q = UBASE - 1; } ObNumber Q; Q.from(q); ObNumber T; mul_words(Q, divisor, T); T.remove_leading_zeroes_unsigned(); for (int i = 0; i < 2; ++i) { cmp = compare_words_unsigned(T, cdividend); if (cmp > 0) { Q.from(--q); sub_words_unsigned(T, divisor, T); } else { break; } } // end for if (Q.nwords_ == 1) { quotient.words_[qidx] = Q.words_[0]; } else { OB_ASSERT(Q.is_zero()); quotient.words_[qidx] = 0; } sub_words_unsigned(cdividend, T, remainder); } }