DATE

The DATE data type stores a year, month, and day.

Syntax

You can express a constant value of type DATE using an interpreted literal, or a string literal annotated with type DATE or coerced to type DATE.

CockroachDB also supports using uninterpreted string literals in contexts where a DATE value is otherwise expected. By default, CockroachDB parses the following string formats for dates:

  • YYYY-MM-DD
  • MM-DD-YYYY
  • MM-DD-YY (default)/YY-MM-DD/DD-MM-YY

To change the input format of truncated dates (e.g., 12-16-06) from MM-DD-YY to YY-MM-DD or DD-MM-YY, set the datestyle session variable or the sql.defaults.datestyle cluster setting. To set the datestyle session variable, the datestyle_enabled session variable must be set to true.

PostgreSQL compatibility

DATE values in CockroachDB are fully PostgreSQL-compatible, including support for special values (e.g., +/- infinity). Existing dates outside of the PostgreSQL date range (4714-11-24 BC to 5874897-12-31) are converted to +/- infinity dates.

Size

A DATE column supports values up to 16 bytes in width, but the total storage size is likely to be larger due to CockroachDB metadata.

Examples

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> CREATE TABLE dates (a DATE PRIMARY KEY, b INT);
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> SHOW COLUMNS FROM dates;
  column_name | data_type | is_nullable | column_default | generation_expression |  indices  | is_hidden
--------------+-----------+-------------+----------------+-----------------------+-----------+------------
  a           | DATE      |    false    | NULL           |                       | {primary} |   false
  b           | INT8      |    true     | NULL           |                       | {primary} |   false
(2 rows)

Explicitly typed DATE literal:

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> INSERT INTO dates VALUES (DATE '2016-03-26', 12345);

String literal implicitly typed as DATE:

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> INSERT INTO dates VALUES ('03-27-16', 12345);
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> SELECT * FROM dates;
      a      |   b
-------------+--------
  2016-03-26 | 12345
  2016-03-27 | 12345
(2 rows)

Supported casting and conversion

DATE values can be cast to any of the following data types:

Type Details
DECIMAL Converts to number of days since the Unix epoch (Jan. 1, 1970).
FLOAT Converts to number of days since the Unix epoch (Jan. 1, 1970).
TIMESTAMP Sets the time to 00:00 (midnight) in the resulting timestamp.
INT Converts to number of days since the Unix epoch (Jan. 1, 1970).
STRING ––

See also

Data Types

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