A 4-byte integer data type used in CREATE TABLE and ALTER TABLE statements.
Syntax:
In the column definition of a CREATE TABLE statement:
column_name INT
Range: -2147483648 .. 2147483647. There is no UNSIGNED subtype.
Conversions: Impala automatically converts to a larger integer type (BIGINT) or a
floating-point type (FLOAT or DOUBLE) automatically. Use
CAST() to convert to TINYINT, SMALLINT,
STRING, or TIMESTAMP.
Casting an integer or floating-point value
N to TIMESTAMP produces a value that is
N seconds past the start of the epoch date (January 1, 1970). By
default, the result value represents a date and time in the UTC time zone. If the
setting ‑‑use_local_tz_for_unix_timestamp_conversions=true
is in effect, the resulting TIMESTAMP represents a date and time in the
local time zone.
Usage notes:
The data type INTEGER is an alias for INT.
For a convenient and automated way to check the bounds of the INT type, call the functions
MIN_INT() and MAX_INT().
If an integer value is too large to be represented as a INT, use a BIGINT
instead.
NULL considerations: Casting any non-numeric value to this type produces a
NULL value.
Examples:
CREATE TABLE t1 (x INT);
SELECT CAST(1000 AS INT);
Partitioning: Prefer to use this type for a partition key column. Impala can
process the numeric type more efficiently than a STRING representation
of the value.
HBase considerations: This data type is fully compatible with HBase tables.
Parquet considerations:
Text table considerations: Values of this type are potentially larger in text tables than in tables using Parquet or other binary formats.
Internal details: Represented in memory as a 4-byte value.
Added in: Available in all versions of Impala.
Column statistics considerations: Because this type has a fixed size, the maximum
and average size fields are always filled in for column statistics, even before you run
the COMPUTE STATS statement.
Related information:
Numeric Literals, TINYINT Data Type, SMALLINT Data Type, INT Data Type, BIGINT Data Type, DECIMAL Data Type (Impala 3.0 or higher only), Impala Mathematical Functions