Null or Missing Values in the Lookup Field

When valid lookup values are provided in the .csv file, they are correctly mapped and inserted into the Big Table records.

When invalid values are entered, the corresponding Big Table record is not created, and an error file is generated for the record.

When using values like null, NULL, Null, 'null', 'NULL', 'Null', empty string (""), or blank, the lookup field should be assigned a null value.
Data in the .csv File Data Inserted into the Big Table Record
null The lookup field should be assigned a null value or blank.
NULL The lookup field should be assigned a null value or blank.
Null The lookup field should be assigned a null value or blank.
"null" The lookup field should be assigned a null value or blank.
"NULL" The lookup field should be assigned a null value or blank.
"Null" The lookup field should be assigned a null value or blank.
"" The lookup field should be assigned a null value or blank.
The lookup field should be assigned a null value or blank.
701Rt00000yrPtmIAE (correct value) The lookup field is assigned the correct value.
701Rt00000yrPtmIAE123 (wrong value) The Big Table record is not created, and a .csv error file is generated with a message. For example: Bad Value - CSV column "Campaign" mapped to BT Field "Campaign" :: Campaign: id value of incorrect type: 701Rt00000yrPtmIAE123