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This article investigates whether MySQL re‑executes an UPDATE statement that sets a column to its current value, comparing behavior under binlog_format=ROW and binlog_format=STATEMENT with binlog_row_image=FULL, and presents test steps, results, and conclusions.
This article examines how MySQL's JDBC driver manages ResultSet resource release, the internal close mechanisms, and the concurrency limitations of Statement objects, illustrated with code excerpts and a Groovy virtual‑thread demo that reveals runtime exceptions when ResultSets are accessed after implicit closure.
This article investigates how MySQL handles UPDATE statements that set columns to their existing values, comparing the behavior under ROW and STATEMENT binlog formats with binlog_row_image set to FULL, and shows that duplicate updates are skipped in ROW mode but executed in STATEMENT mode.