jodd-db/src/main/java/jodd/db/oom/sqlgen/DbEntitySql.java
public DbSqlBuilder increaseColumn(final Class entity, final Object id, final String columnRef, final Number delta, final boolean increase) {
		final String tableRef = createTableRefName(entity);

		return sql().$(UPDATE).table(entity, null, tableRef).$(SET)
				.ref(null, columnRef).$(EQUALS).ref(null, columnRef)
				.$(increase ? StringPool.PLUS : StringPool.DASH)
				.columnValue(delta).$(WHERE).refId(tableRef).$(EQUALS).columnValue(id);
	}
public DbSqlBuilder increaseColumn(final Class entity, final Object id, final String columnRef, final Number delta, final boolean increase) {
		final String tableRef = createTableRefName(entity);

		return sql().$(UPDATE).table(entity, null, tableRef).$(SET)
				.ref(null, columnRef).$(EQUALS).ref(null, columnRef)
				.$(increase ? StringPool.PLUS : StringPool.DASH)
				.columnValue(delta).$(WHERE).refId(tableRef).$(EQUALS).columnValue(id);
	}
Creates UPDATE that increases/decreases column by some delta value.