Re: [HACKERS] The question about the type numeric
I am so sorry for that. This is my fault. My mail client does not receive any e-mail. So I tried to re-send the e-mail again. My problem has been resolved. Thank you for your reply. 2014-04-16 wangshuo HighGo Software Co.,Ltd. Address: A203 Block D QILU Soft Park, High-Tech Zone, Lixia district, Jinan Shandong, China(Head Office) Tel:+86-0531-55701530 Fax:+86-0531-55701544 Website：www.highgo.com Mobile：18766416137 发件人：David G Johnston 发送时间：2014-04-16 10:23 主题：Re: [HACKERS] The question about the type numeric 收件人："pgsql-hackers" 抄送： sure.postgres wrote > Hi hackers, > > I am learning about numeric . > The comment of NumericShort format is: > * In the NumericShort format, the remaining 14 bits of the header word > * (n_short.n_header) are allocated as follows: 1 for sign (positive or > * negative), 6 for dynamic scale, and 7 for weight. In practice, most > * commonly-encountered values can be represented this way. > > So the Max of the NumericShort format should be up to 508 digits before > the decimal point. > So the sign of the number > 12345678901234567890123456789012345678901234567890 > 12345678901234567890123456789012345678901234567890123456789012345678901234567890 > > 12345678901234567890123456789012345678901234567890123456789012345678901234567890 > > 12345678901234567890123456789012345678901234567 > should be 0x807F. > The number is 257 digits before the decimal point. > But the sign is 0. > So is there anything wrong? [1000 00][0][00111 0][001] I appreciate that you got no responses on the original e-mail but if you are going to re-raise the question at least have the courtesy to respond to your original thread and not go and start a new one. And maybe trying rephrasing the question since most likely your original question was not worded in such a way to garner a response. I may have this totally wrong but I don't see why the sign of your number should be anything but "zero" since that is, I presume, the value of the specific bit for a positive number - which yours is. So, in short, nothing seems to "be wrong". If you think something is wrong you should probably state what that is explicitly and ask someone to explain what is happening. I would have said all this when I saw the first e-mail but I wasn't (and still am not) totally clear on what you are asking and was hoping someone more familiar could make better sense of it. David J. -- View this message in context: http://postgresql.1045698.n5.nabble.com/The-question-about-the-type-numeric-tp5800173p5800174.html Sent from the PostgreSQL - hackers mailing list archive at Nabble.com. -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
[HACKERS] The question about the type numeric
Hi hackers, I am learning about numeric . The comment of NumericShort format is: * In the NumericShort format, the remaining 14 bits of the header word * (n_short.n_header) are allocated as follows: 1 for sign (positive or * negative), 6 for dynamic scale, and 7 for weight. In practice, most * commonly-encountered values can be represented this way. So the Max of the NumericShort format should be up to 508 digits before the decimal point. So the sign of the number 12345678901234567890123456789012345678901234567890 12345678901234567890123456789012345678901234567890123456789012345678901234567890 12345678901234567890123456789012345678901234567890123456789012345678901234567890 12345678901234567890123456789012345678901234567 should be 0x807F. The number is 257 digits before the decimal point. But the sign is 0. So is there anything wrong? 2014-04-15 wangshuo HighGo Software Co.,Ltd. Address: A203 Block D QILU Soft Park, High-Tech Zone, Lixia district, Jinan Shandong, China(Head Office) Tel:+86-0531-55701530 Fax:+86-0531-55701544 Website：www.highgo.com Mobile：18766416137
[HACKERS] The question about the type numeric
Hi hackers, I am learning about numeric . The comment of NumericShort format is: * In the NumericShort format, the remaining 14 bits of the header word * (n_short.n_header) are allocated as follows: 1 for sign (positive or * negative), 6 for dynamic scale, and 7 for weight. In practice, most * commonly-encountered values can be represented this way. So the Max of the NumericShort format should be up to 508 digits before the decimal point. So the sign of the number 12345678901234567890123456789012345678901234567890 12345678901234567890123456789012345678901234567890123456789012345678901234567890 12345678901234567890123456789012345678901234567890123456789012345678901234567890 12345678901234567890123456789012345678901234567 should be 0x807F. The number is 257 digits before the decimal point. But the sign is 0. So is there anything wrong? Thank you! 2014-04-15 wangshuo HighGo Software Co.,Ltd. Address: A203 Block D QILU Soft Park, High-Tech Zone, Lixia district, Jinan Shandong, China(Head Office) Tel:+86-0531-55701530 Fax:+86-0531-55701544 Website：www.highgo.com Mobile：18766416137
[HACKERS] The question about the type numeric
Hi hackers, I am learning about numeric . The comment of NumericShort format is: * In the NumericShort format, the remaining 14 bits of the header word * (n_short.n_header) are allocated as follows: 1 for sign (positive or * negative), 6 for dynamic scale, and 7 for weight. In practice, most * commonly-encountered values can be represented this way. So the Max of the NumericShort format should be up to 508 digits before the decimal point. So the sign of the number 12345678901234567890123456789012345678901234567890 12345678901234567890123456789012345678901234567890123456789012345678901234567890 12345678901234567890123456789012345678901234567890123456789012345678901234567890 12345678901234567890123456789012345678901234567 should be 0x807F. The number is 257 digits before the decimal point. But the sign is 0. So is there anything wrong? 2014-04-15 wangshuo HighGo Software Co.,Ltd. Address: A203 Block D QILU Soft Park, High-Tech Zone, Lixia district, Jinan Shandong, China(Head Office) Tel:+86-0531-55701530 Fax:+86-0531-55701544 Website：www.highgo.com Mobile：18766416137
