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Last tested; Mar 24, 2020
This happens when a field name has upper-case letters. Because LookML is case sensitive, we append a _1 to the field name alias in the generated SQL to avoid any potential collision with a field that has the same name with different case.
Generated SQL looks something like:
SELECT
view.field_name AS view_field_name_1
FROM `bigquery-table-stuff`
For a field that is simply:
dimension: Field_Name {
type: string
sql: ${TABLE}.field_name ;;
}
Example:
### Capital Letters ###
explore: NEW_EXPLORE {
from: breeds
join: not_bites {
from: bites
type: left_outer
sql_on: ${not_bites.breed} = ${NEW_EXPLORE.breed_name} ;;
relationship: one_to_one
}
}
### GENERATED SQL ###
SELECT
NEW_EXPLORE.breed_name AS new_explore_breed_name_1,
1=1 AS new_explore_dummy_1
FROM dogs_of_new_york.breeds AS NEW_EXPLORE
GROUP BY 1
ORDER BY 1
### Lower case ###
explore: new_explore {
from: breeds
join: not_bites {
from: bites
type: left_outer
sql_on: ${not_bites.breed} = ${new_explore.breed_name} ;;
relationship: one_to_one
}
}
### Generated SQL ###
SELECT
new_explore.breed_name AS new_explore_breed_name,
1=1 AS new_explore_dummy
FROM dogs_of_new_york.breeds AS new_explore
GROUP BY 1
ORDER BY 1
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