FIRST_ELEMENT

Returns the first element in the array.

Syntax

FIRST_ELEMENT(input)

Arguments

Name	Type	Description	Default Value
input	any

Examples

input	Output
null::string	null
array['a', 'b', 'c']	a

Transformation job example

SQL

CREATE JOB function_operator_example
    ADD_MISSING_COLUMNS = true
AS INSERT INTO default_glue_catalog.upsolver_samples.orders_transformed_data 
  MAP_COLUMNS_BY_NAME
    SELECT input,
        FIRST_ELEMENT(input) AS Output
    FROM default_glue_catalog.upsolver_samples.orders_raw_data
    LET input = null::string
    WHERE $commit_time BETWEEN run_start_time() AND run_end_time()
    LIMIT 1;

Query result

input	Output
null::string	null