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MySQL 9.0 Reference Manual

ARow object models a row in a result set.Row provides the methods listed here:

getField(Stringname): Returns the value of the first field namedname. You can retrieve the name usinggetColumnLabel().
getLength(): Returns the number of fields in the row.

In addition, the API provides the following convenience mechanisms for looking up a column value in a given row:

Row object property lookup: The column name can be used directly as an object property as long as it is a legal JavaScript identifier.
Example:row.my_column.
Row object key lookup: The column name, quoted, can be used as a key name.
Example:row['my_column'].
Row object index lookup: A valid column index can be used to look up the column value.
Example:row[2].