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2d03d330bc
The Year 1925 is a starting point because most of the timezones switched to saner (mostly 15-minutes based) offsets somewhere during 1924 or before. And that significantly simplifies implementation. 2238 is to simplify arithmetics for sanitizing LUT index access; there are less than 0x1ffff days from 1925. * Extended DateLUTImpl internal LUT to 0x1ffff items, some of which represent negative (pre-1970) time values. As a collateral benefit, Date now correctly supports dates up to 2149 (instead of 2106). * Added a new strong typedef ExtendedDayNum, which represents dates pre-1970 and post 2149. * Functions that used to return DayNum now return ExtendedDayNum. * Refactored DateLUTImpl to untie DayNum from the dual role of being a value and an index (due to negative time). Index is now a different type LUTIndex with explicit conversion functions from DatNum, time_t, and ExtendedDayNum. * Updated DateLUTImpl to properly support values close to epoch start (1970-01-01 00:00), including negative ones. * Reduced resolution of DateLUTImpl::Values::time_at_offset_change to multiple of 15-minutes to allow storing 64-bits of time_t in DateLUTImpl::Value while keeping same size. * Minor performance updates to DateLUTImpl when building month LUT by skipping non-start-of-month days. * Fixed extractTimeZoneFromFunctionArguments to work correctly with DateTime64. * New unit-tests and stateless integration tests for both DateTime and DateTime64. |
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.. | ||
build | ||
check-marks | ||
check-mysql-binlog | ||
check-style | ||
checksum-for-compressed-block | ||
ci | ||
compressor | ||
config-processor | ||
convert-month-partitioned-parts | ||
corrector_utf8 | ||
db-generator | ||
durability-test | ||
generate-ya-make | ||
github | ||
github-hook | ||
grammar-fuzzer | ||
grpc-client | ||
iotest | ||
junit_to_html | ||
kafka | ||
link-validate | ||
list-licenses | ||
list-versions | ||
package | ||
postprocess-traces | ||
release | ||
report | ||
s3tools | ||
simple-backport | ||
syntax-analyzer | ||
test_history | ||
test-data-generator | ||
upload_test_results | ||
wal-dump | ||
wikistat-loader | ||
zookeeper-adjust-block-numbers-to-parts | ||
zookeeper-cli | ||
zookeeper-create-entry-to-download-part | ||
zookeeper-dump-tree | ||
zookeeper-remove-by-list | ||
zookeeper-test | ||
clickhouse-docker | ||
CMakeLists.txt |