find_value¶

find_value(arr, value)

Description¶

Return the first offset (zero-based index) of value in array arr (or null if value is not in arr).

Usage¶

Call or Deploy find_value ?

Call find_value directly

The easiest way to use bigfunctions

find_value function is deployed in 39 public datasets for all of the 39 BigQuery regions.
It can be called by anyone. Just copy / paste examples below in your BigQuery console. It just works!
(You need to use the dataset in the same region as your datasets otherwise you may have a function not found error)

Public BigFunctions Datasets

Region	Dataset
`eu`	`bigfunctions.eu`
`us`	`bigfunctions.us`
`europe-west1`	`bigfunctions.europe_west1`
`asia-east1`	`bigfunctions.asia_east1`
...	...

Deploy find_value in your project

Why deploy?

You may prefer to deploy find_value in your own project to build and manage your own catalog of functions.
This is particularly useful if you want to create private functions (for example calling your internal APIs).
Get started by reading the framework page

Deployment

find_value function can be deployed with:

pip install bigfunctions
bigfun get find_value
bigfun deploy find_value

Examples¶

1. When value is in array

EUUSeurope-west1

select bigfunctions.eu.find_value([3, 4], 4)

select bigfunctions.us.find_value([3, 4], 4)

select bigfunctions.europe_west1.find_value([3, 4], 4)

+--------+
| offset |
+--------+
| 1      |
+--------+

2. When value is not in array

EUUSeurope-west1

select bigfunctions.eu.find_value([3, 4], 7)

select bigfunctions.us.find_value([3, 4], 7)

select bigfunctions.europe_west1.find_value([3, 4], 7)

+--------+
| offset |
+--------+
| null   |
+--------+

Use cases¶

You have a table of customer orders, and each order has an array of product IDs. You want to find the position of a specific product ID within each order's product array.

Table Schema:

CREATE OR REPLACE TABLE `your_project.your_dataset.orders` (
  order_id INT64,
  product_ids ARRAY<INT64>
);

INSERT INTO `your_project.your_dataset.orders` (order_id, product_ids) VALUES
(1, [101, 102, 103, 104]),
(2, [102, 105, 106]),
(3, [101, 103, 107, 102]);

Use Case: Finding the position of product ID 102:

SELECT
    order_id,
    bigfunctions.your_region.find_value(product_ids, 102) AS product_102_position
  FROM
    `your_project.your_dataset.orders`;

Result:

+---------+----------------------+
| order_id | product_102_position |
+---------+----------------------+
|       1 |                    1 |
|       2 |                    0 |
|       3 |                    3 |
+---------+----------------------+

Explanation:

The find_value function searches the product_ids array for the value 102.
It returns the zero-based index (position) of the first occurrence of 102.
For order_id = 1, 102 is at index 1.
For order_id = 2, 102 is at index 0.
For order_id = 3, 102 is at index 3.

Other Potential Use Cases:

Inventory Management: Find the location of a specific item within a warehouse represented as an array.
Log Analysis: Find the first occurrence of a specific error code within a log entry containing an array of codes.
User Behavior Analysis: Determine the position of a specific action within a user's sequence of actions on a website.

Remember to replace your_project, your_dataset, and your_region with your actual values. For example, if your dataset is in the us-central1 region, you would use bigfunctions.us_central1.

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report a bug so that it can be improved.
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