BigQuery 临时 function 将 int 转换为字符串

Question

I am using bigquery with standart SQL. When I pass to a function int field, the function converts it to string.

Here is the code:

CREATE TEMPORARY FUNCTION test_function(int_field INT64) RETURNS INT64

LANGUAGE js AS """
throw typeof(int_field)
//return int_field
""";

WITH

test_table as (SELECT 1 as int_field)

SELECT test_function(int_field) from test_table

Here is Error: string at test_function(INT64) line 2, column 1

Here is Job ID: fabrika-okon:bquijob_2cb8c50e_15d9db59b4f

Answer 1

As JavaScript does not support a 64-bit integer type, INT64 is unsupported in input or output types for JavaScript UDFs . Instead, use FLOAT64 to represent integer values as a number, or STRING to represent integer values as a string.

See more at SQL type encodings in JavaScript

Answer 2

You can try this:

CREATE TEMP FUNCTION calculateGender(gender NUMERIC) RETURNS STRING LANGUAGE js AS
  "switch(gender){ case 0: return 'Male'; case 1: return 'Female';}";

SELECT calculateGender(0) as Masculino, calculateGender(1) as Femenino;