- Identify the specific column and table related to the error. Use the error log details to find this information.
- Check the length of the input string causing the error. For example, if the error is related to a specific column named
column_name in table_name, run:
SELECT max(length(column_name)) FROM table_name;
- Compare the maximum length from the query above with the defined column length using the
\d table_name command in the psql terminal to describe the table structure and find the defined length for column_name. - If the input string exceeds the column length, consider truncating the input to match the column length. For example:
UPDATE table_name SET column_name = substr(column_name, 1, [max_length]) WHERE length(column_name) > [max_length];
Replace [max_length] with the appropriate length limit.
- Alternatively, if truncating data is not desirable, adjust the column length to accommodate larger data. First, ensure there's enough space on the database server for schema changes, then run:
ALTER TABLE table_name ALTER COLUMN column_name TYPE varchar(new_length);
Replace new_length with the new size required for the column.
- After making adjustments, re-run the operation that caused the error to verify the issue is resolved.
