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MXS-2265: Fix formatting of the zero timestamp

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The UNIX timestamp 0 should be treated as a special value and must be
interpreted as 0-00-00 00:00:00 instead of 1970-01-01 00:00:00.
This commit is contained in:
Markus Mäkelä
2019-02-05 14:04:27 +02:00
parent 554f1cc41c
commit cf4724d128
2 changed files with 40 additions and 4 deletions
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28
server/core/mysql_binlog.cc
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@ -375,7 +375,16 @@ static void unpack_datetime2(uint8_t* ptr, uint8_t decimals, struct tm* dest)
static void unpack_timestamp(uint8_t* ptr, uint8_t decimals, struct tm* dest)
{
time_t t = unpack4(ptr);
localtime_r(&t, dest);
if (t == 0)
{
// Use GMT date to detect zero date timestamps
gmtime_r(&t, dest);
}
else
{
localtime_r(&t, dest);
}
}
#define unpack3(data) (data[2] + (data[1] << 8) + (data[0] << 16))
@ -575,6 +584,13 @@ size_t unpack_temporal_value(uint8_t type, uint8_t* ptr, uint8_t* metadata, int
return temporal_field_size(type, metadata, length);
}
static bool is_zero_date(struct tm* tm)
{
// Detects 1970-01-01 00:00:00
return tm->tm_sec == 0 && tm->tm_min == 0 && tm->tm_hour == 0
&& tm->tm_mday == 1 && tm->tm_mon == 0 && tm->tm_year == 70;
}
void format_temporal_value(char* str, size_t size, uint8_t type, struct tm* tm)
{
const char* format = "";
@ -606,7 +622,15 @@ void format_temporal_value(char* str, size_t size, uint8_t type, struct tm* tm)
mxb_assert(false);
break;
}
strftime(str, size, format, tm);
if ((type == TABLE_COL_TYPE_TIMESTAMP || type == TABLE_COL_TYPE_TIMESTAMP2) && is_zero_date(tm))
{
strcpy(str, "0-00-00 00:00:00");
}
else
{
strftime(str, size, format, tm);
}
}
/**