MySQL-specific event fields.
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mysql.affected_rows
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If the MySQL command is successful, this field contains the affected number of rows of the last statement.
type: long
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mysql.insert_id
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If the INSERT query is successful, this field contains the id of the newly inserted row.
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mysql.num_fields
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If the SELECT query is successful, this field is set to the number of fields returned.
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mysql.num_rows
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If the SELECT query is successful, this field is set to the number of rows returned.
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mysql.query
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The row mysql query as read from the transaction’s request.
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mysql.error_code
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The error code returned by MySQL.
type: long
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mysql.error_message
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The error info message returned by MySQL.