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If I create a table mytable with column data as varchar(2) and then insert something like '123' into the column, postgres will give me an error for Value too long for type.
How can I have Postgres ignore this and truncate the value if necessary?
Also, I do not (when creating the query) know the actual size of the data column in mytable so I can’t just cast it.
According to the postgres documentation, you have to explicitly cast it to achieve this behavior, as returning an error is a requirement of the SQL standard. Is there no way to inspect the table’s schema before creating the query to know what to cast it to?