forked from ClickHouse/ClickHouse
-
Notifications
You must be signed in to change notification settings - Fork 0
Expand file tree
/
Copy pathDataTypeDateTime.cpp
More file actions
200 lines (170 loc) · 6.19 KB
/
DataTypeDateTime.cpp
File metadata and controls
200 lines (170 loc) · 6.19 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
#include <DataTypes/DataTypeDateTime.h>
#include <Columns/ColumnVector.h>
#include <Common/assert_cast.h>
#include <common/DateLUT.h>
#include <DataTypes/DataTypeFactory.h>
#include <Formats/FormatSettings.h>
#include <Formats/ProtobufReader.h>
#include <Formats/ProtobufWriter.h>
#include <IO/Operators.h>
#include <IO/ReadHelpers.h>
#include <IO/WriteBufferFromString.h>
#include <IO/WriteHelpers.h>
#include <IO/parseDateTimeBestEffort.h>
#include <Parsers/ASTLiteral.h>
namespace
{
using namespace DB;
inline void readText(time_t & x, ReadBuffer & istr, const FormatSettings & settings, const DateLUTImpl & time_zone, const DateLUTImpl & utc_time_zone)
{
switch (settings.date_time_input_format)
{
case FormatSettings::DateTimeInputFormat::Basic:
readDateTimeText(x, istr, time_zone);
return;
case FormatSettings::DateTimeInputFormat::BestEffort:
parseDateTimeBestEffort(x, istr, time_zone, utc_time_zone);
return;
}
}
}
namespace DB
{
TimezoneMixin::TimezoneMixin(const String & time_zone_name)
: has_explicit_time_zone(!time_zone_name.empty()),
time_zone(DateLUT::instance(time_zone_name)),
utc_time_zone(DateLUT::instance("UTC"))
{}
DataTypeDateTime::DataTypeDateTime(const String & time_zone_name)
: TimezoneMixin(time_zone_name)
{
}
DataTypeDateTime::DataTypeDateTime(const TimezoneMixin & time_zone_)
: TimezoneMixin(time_zone_)
{}
String DataTypeDateTime::doGetName() const
{
if (!has_explicit_time_zone)
return "DateTime";
WriteBufferFromOwnString out;
out << "DateTime(" << quote << time_zone.getTimeZone() << ")";
return out.str();
}
void DataTypeDateTime::serializeText(const IColumn & column, size_t row_num, WriteBuffer & ostr, const FormatSettings & settings) const
{
auto value = assert_cast<const ColumnType &>(column).getData()[row_num];
switch (settings.date_time_output_format)
{
case FormatSettings::DateTimeOutputFormat::Simple:
writeDateTimeText(value, ostr, time_zone);
return;
case FormatSettings::DateTimeOutputFormat::UnixTimestamp:
writeIntText(value, ostr);
return;
case FormatSettings::DateTimeOutputFormat::ISO:
writeDateTimeTextISO(value, ostr, utc_time_zone);
return;
}
}
void DataTypeDateTime::serializeTextEscaped(const IColumn & column, size_t row_num, WriteBuffer & ostr, const FormatSettings & settings) const
{
serializeText(column, row_num, ostr, settings);
}
void DataTypeDateTime::deserializeWholeText(IColumn & column, ReadBuffer & istr, const FormatSettings & settings) const
{
deserializeTextEscaped(column, istr, settings);
}
void DataTypeDateTime::deserializeTextEscaped(IColumn & column, ReadBuffer & istr, const FormatSettings & settings) const
{
time_t x;
::readText(x, istr, settings, time_zone, utc_time_zone);
assert_cast<ColumnType &>(column).getData().push_back(x);
}
void DataTypeDateTime::serializeTextQuoted(const IColumn & column, size_t row_num, WriteBuffer & ostr, const FormatSettings & settings) const
{
writeChar('\'', ostr);
serializeText(column, row_num, ostr, settings);
writeChar('\'', ostr);
}
void DataTypeDateTime::deserializeTextQuoted(IColumn & column, ReadBuffer & istr, const FormatSettings & settings) const
{
time_t x;
if (checkChar('\'', istr)) /// Cases: '2017-08-31 18:36:48' or '1504193808'
{
::readText(x, istr, settings, time_zone, utc_time_zone);
assertChar('\'', istr);
}
else /// Just 1504193808 or 01504193808
{
readIntText(x, istr);
}
assert_cast<ColumnType &>(column).getData().push_back(x); /// It's important to do this at the end - for exception safety.
}
void DataTypeDateTime::serializeTextJSON(const IColumn & column, size_t row_num, WriteBuffer & ostr, const FormatSettings & settings) const
{
writeChar('"', ostr);
serializeText(column, row_num, ostr, settings);
writeChar('"', ostr);
}
void DataTypeDateTime::deserializeTextJSON(IColumn & column, ReadBuffer & istr, const FormatSettings & settings) const
{
time_t x;
if (checkChar('"', istr))
{
::readText(x, istr, settings, time_zone, utc_time_zone);
assertChar('"', istr);
}
else
{
readIntText(x, istr);
}
assert_cast<ColumnType &>(column).getData().push_back(x);
}
void DataTypeDateTime::serializeTextCSV(const IColumn & column, size_t row_num, WriteBuffer & ostr, const FormatSettings & settings) const
{
writeChar('"', ostr);
serializeText(column, row_num, ostr, settings);
writeChar('"', ostr);
}
void DataTypeDateTime::deserializeTextCSV(IColumn & column, ReadBuffer & istr, const FormatSettings & settings) const
{
time_t x;
if (istr.eof())
throwReadAfterEOF();
char maybe_quote = *istr.position();
if (maybe_quote == '\'' || maybe_quote == '\"')
++istr.position();
::readText(x, istr, settings, time_zone, utc_time_zone);
if (maybe_quote == '\'' || maybe_quote == '\"')
assertChar(maybe_quote, istr);
assert_cast<ColumnType &>(column).getData().push_back(x);
}
void DataTypeDateTime::serializeProtobuf(const IColumn & column, size_t row_num, ProtobufWriter & protobuf, size_t & value_index) const
{
if (value_index)
return;
// On some platforms `time_t` is `long` but not `unsigned int` (UInt32 that we store in column), hence static_cast.
value_index = static_cast<bool>(protobuf.writeDateTime(static_cast<time_t>(assert_cast<const ColumnType &>(column).getData()[row_num])));
}
void DataTypeDateTime::deserializeProtobuf(IColumn & column, ProtobufReader & protobuf, bool allow_add_row, bool & row_added) const
{
row_added = false;
time_t t;
if (!protobuf.readDateTime(t))
return;
auto & container = assert_cast<ColumnType &>(column).getData();
if (allow_add_row)
{
container.emplace_back(t);
row_added = true;
}
else
container.back() = t;
}
bool DataTypeDateTime::equals(const IDataType & rhs) const
{
/// DateTime with different timezones are equal, because:
/// "all types with different time zones are equivalent and may be used interchangingly."
return typeid(rhs) == typeid(*this);
}
}