13.1. Data Types
Presto currently supports a limited set of data types. These types can be used with the standard CAST operator.
BOOLEAN
This type captures boolean values true and false.
BIGINT
A 64-bit signed two’s complement integer with a minimum value of -2^63 and a maximum value of 2^63 - 1.
DOUBLE
A double is a 64-bit inexact, variable-precision implementing the IEEE Standard 754 for Binary Floating-Point Arithmetic.
DECIMAL
A fixed precision decimal number. Precision up to 38 digits is supported but performance is best up to 17 digits.
DECIMAL type takes two literal parameters:
- precision - total number of digits
- scale - number of digits in fractional part. Scale is optional and defaults to 0.
Example type definitions: DECIMAL(10,3), DECIMAL(20)
Example literals: DECIMAL 10.3, DECIMAL 1234567890
Decimal support is currently in BETA stage. See list of known limitations.
VARCHAR
Variable length character data.
VARBINARY
Variable length binary data.
JSON
Variable length json data.
DATE
Calendar date (year, month, day).
Example: DATE '2001-08-22'
TIME
Time of day (hour, minute, second, millisecond) without a time zone. Values of this type are parsed and rendered in the session time zone.
Example: TIME '01:02:03.456'
TIME WITH TIME ZONE
Time of day (hour, minute, second, millisecond) with a time zone. Values of this type are rendered using the time zone from the value.
Example: TIME '01:02:03.456 America/Los_Angeles'
TIMESTAMP
Instant in time that includes the date and time of day without a time zone. Values of this type are parsed and rendered in the session time zone.
Example: TIMESTAMP '2001-08-22 03:04:05.321'
TIMESTAMP WITH TIME ZONE
Instant in time that includes the date and time of day with a time zone. Values of this type are rendered using the time zone from the value.
Example: TIMESTAMP '2001-08-22 03:04:05.321 America/Los_Angeles'
INTERVAL YEAR TO MONTH
Span of years and months.
Example: INTERVAL '3' MONTH
INTERVAL DAY TO SECOND
Span of days, hours, minutes, seconds and milliseconds.
Example: INTERVAL '2' DAY
ARRAY
An array of the given component type.
Example: ARRAY[1, 2, 3]
MAP
A map between the given component types.
ROW
A structure made up of named fields. The fields may be of any SQL type, and are accessed with field reference operator .
Example: my_column.my_field