Pushdown Timestamp Extraction functions to ClickHouse #23802
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The time zone is not stored in the rows of the table, but is stored in the column metadata. From ClickHouse documentation https://clickhouse.com/docs/en/sql-reference/data-types/datetime The point in time is saved as a Unix timestamp, regardless of the time zone or daylight saving time. The time zone affects how the values of the DateTime type values are displayed in text format and how the values specified as strings are parsed (‘2020-01-01 05:00:01’). Timezone agnostic Unix timestamp is stored in tables, and the timezone is used to transform it to text format or back during data import/export or to make calendar calculations on the values (example: toDate, toHour functions etc.). The time zone is not stored in the rows of the table (or in resultset), but is stored in the column metadata.
TIMESTAMP(p) TIMESTAMP(p) WITH TIME ZONE
This was referenced Oct 16, 2024
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This pull request has gone a while without any activity. Tagging the Trino developer relations team: @bitsondatadev @colebow @mosabua |
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Closing this pull request, as it has been stale for six weeks. Feel free to re-open at any time. |
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Description
Additional context and related issues
PRs:
Trino & ClickHouse docs:
https://trino.io/docs/current/functions/datetime.html#convenience-extraction-functions
https://clickhouse.com/docs/en/sql-reference/functions/date-time-functions
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