Helper function to check that stock id exist in the Stock database

Intended for internal use, makes some assumptions about inputs.

Usage

stock_id_comp(table_name, df, stock_ref)

Arguments

table_name

Character of table name, for informative messages

df

Dataframe

stock_ref

numeric vector of all stock IDs. Should be stock_df$stock_id.

Value

numeric; 0 if no warning, 1 if warning.