Categories:

Semi-structured and structured data functions (Array/Object)

ARRAY_GENERATE_RANGE¶

Returns an ARRAY of integer values within a specified range (e.g. [2, 3, 4]).

Syntax¶

ARRAY_GENERATE_RANGE( <start> , <stop> [ , <step> ] )
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Arguments¶

Required:

start

The first number in the range of numbers to return.

You must specify an expression that evaluates to an INTEGER value.

stop

The last number in the range. Note that this number is not included in the range of numbers returned.

For example, ARRAY_GENERATE_RANGE(1, 5) returns [1, 2, 3, 4] (which does not include 5).

You must specify an expression that evaluates to an INTEGER value.

Optional:

step

The amount to increment or decrement each subsequent number in the array. For example:

  • ARRAY_GENERATE_RANGE(0, 16, 5) returns [0, 5, 10, 15]

  • ARRAY_GENERATE_RANGE(0, -16, -5) returns [0, -5, -10, -15]

You can specify a positive or negative number. You cannot specify 0.

The default value is 1.

Returns¶

An ARRAY of integers in the specified range.

If any of the arguments is NULL, the function returns NULL.

Usage notes¶

  • After start, each subsequent element increases or decreases by step (depending on whether step is positive or negative) up to (but not including) stop.

    For example:

    • ARRAY_GENERATE_RANGE(10, 50, 10) returns [10, 20, 30, 40].

    • ARRAY_GENERATE_RANGE(-10, -50, -10) returns [-10, -20, -30, -40].

  • The function returns an empty ARRAY under any of the following conditions:

    • start = stop.

    • step is a positive number and start > stop.

    • step is a negative number and start < stop.

    For example:

    • ARRAY_GENERATE_RANGE(2, 2, 4) returns [].

    • ARRAY_GENERATE_RANGE(8, 2, 2) returns [].

    • ARRAY_GENERATE_RANGE(2, 8, -2) returns [].

Examples¶

The following example returns an ARRAY containing a range of numbers starting from 2 and ending before 5:

SELECT ARRAY_GENERATE_RANGE(2, 5);
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+----------------------------+
| ARRAY_GENERATE_RANGE(2, 5) |
|----------------------------|
| [                          |
|   2,                       |
|   3,                       |
|   4                        |
| ]                          |
+----------------------------+

The following example returns an ARRAY containing a range of numbers starting from 5 and ending before 25, increasing in value by 10:

SELECT ARRAY_GENERATE_RANGE(5, 25, 10);
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+---------------------------------+
| ARRAY_GENERATE_RANGE(5, 25, 10) |
|---------------------------------|
| [                               |
|   5,                            |
|   15                            |
| ]                               |
+---------------------------------+

The following example returns an ARRAY containing a range of numbers starting from -5 and ending before -25, decreasing in value by -10:

SELECT ARRAY_GENERATE_RANGE(-5, -25, -10);
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+------------------------------------+
| ARRAY_GENERATE_RANGE(-5, -25, -10) |
|------------------------------------|
| [                                  |
|   -5,                              |
|   -15                              |
| ]                                  |
+------------------------------------+
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