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Merge pull request #35840 from zzsmdfj/issue/#34966_fix_dateTime_deserialize

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to #34966_fix_dateTime_deserialize
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Yakov Olkhovskiy 2022-04-06 08:10:23 -04:00 committed by GitHub
commit c73115ffb4
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3 changed files with 32 additions and 4 deletions
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19
src/IO/ReadHelpers.h
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@ -851,6 +851,8 @@ inline ReturnType readDateTimeTextImpl(time_t & datetime, ReadBuffer & buf, cons
/// YYYY-MM-DD hh:mm:ss /// YYYY-MM-DD hh:mm:ss
static constexpr auto DateTimeStringInputSize = 19; static constexpr auto DateTimeStringInputSize = 19;
///YYYY-MM-DD
static constexpr auto DateStringInputSize = 10;
bool optimistic_path_for_date_time_input = s + DateTimeStringInputSize <= buf.buffer().end(); bool optimistic_path_for_date_time_input = s + DateTimeStringInputSize <= buf.buffer().end();
if (optimistic_path_for_date_time_input) if (optimistic_path_for_date_time_input)
@ -861,16 +863,27 @@ inline ReturnType readDateTimeTextImpl(time_t & datetime, ReadBuffer & buf, cons
UInt8 month = (s[5] - '0') * 10 + (s[6] - '0'); UInt8 month = (s[5] - '0') * 10 + (s[6] - '0');
UInt8 day = (s[8] - '0') * 10 + (s[9] - '0'); UInt8 day = (s[8] - '0') * 10 + (s[9] - '0');
UInt8 hour = (s[11] - '0') * 10 + (s[12] - '0'); UInt8 hour = 0;
UInt8 minute = (s[14] - '0') * 10 + (s[15] - '0'); UInt8 minute = 0;
UInt8 second = (s[17] - '0') * 10 + (s[18] - '0'); UInt8 second = 0;
///simply determine whether it is YYYY-MM-DD hh:mm:ss or YYYY-MM-DD by the content of the tenth character in an optimistic scenario
bool dt_long = (s[10] == ' ' || s[10] == 'T');
if (dt_long)
{
hour = (s[11] - '0') * 10 + (s[12] - '0');
minute = (s[14] - '0') * 10 + (s[15] - '0');
second = (s[17] - '0') * 10 + (s[18] - '0');
}
if (unlikely(year == 0)) if (unlikely(year == 0))
datetime = 0; datetime = 0;
else else
datetime = date_lut.makeDateTime(year, month, day, hour, minute, second); datetime = date_lut.makeDateTime(year, month, day, hour, minute, second);
if (dt_long)
buf.position() += DateTimeStringInputSize; buf.position() += DateTimeStringInputSize;
else
buf.position() += DateStringInputSize;
return ReturnType(true); return ReturnType(true);
} }
else else

5
tests/queries/0_stateless/02249_parse_date_time_basic.reference Normal file
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@ -0,0 +1,5 @@
2022-03-31T00:00:00Z 1
2022-04-01T09:10:24Z 2
2022-03-31T10:18:56Z 3
2022-03-31T10:18:56Z 4
2022-04-01T09:10:24Z 5

10
tests/queries/0_stateless/02249_parse_date_time_basic.sql Normal file
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@ -0,0 +1,10 @@
SET date_time_output_format='iso';
drop table if exists t;
CREATE TABLE t (a DateTime('UTC'), b String, c String, d String, e Int32) ENGINE = Memory;
INSERT INTO t(a, b, c, d ,e) VALUES ('2022-03-31','','','',1);
INSERT INTO t(a, b, c, d ,e) VALUES (1648804224,'','','',2);
INSERT INTO t(a, b, c, d ,e) VALUES ('2022-03-31 10:18:56','','','',3);
INSERT INTO t(a, b, c, d ,e) VALUES ('2022-03-31T10:18:56','','','',4);
INSERT INTO t(a, b, c, d ,e) VALUES ('1648804224','','','',5);
select a, e from t order by e;
drop table if exists t;