Why Am I Still Getting a \'Data Truncated\' Error After Modifying a MySQL Column\'s Data Type?

Data Truncation Error after Column Type Modification

After altering the data type of a MySQL column to accommodate longer strings, an attempt to manually update the column data results in a "Data truncated" error. Despite confirming the successful modification of the column's data type, the error persists.

The underlying issue lies in the incorrect length specified for the column. While the data type was modified, the column's length remained unchanged. This means that the column is still configured to store only a limited number of characters, which gets truncated when trying to store values exceeding that limit.

To resolve the issue, the column's length must be adjusted to match the desired string length. The following command can be used to change the length of the incoming_Cid column from 1 character to 34 characters:

ALTER TABLE calls CHANGE incoming_Cid incoming_Cid CHAR(34);

After executing this command, the error will be resolved, and the column will be able to store the 34-character Twilio call ids as intended.

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