10) What is elog()?
11) What is configure all about?
12) How do I add a new port?
+ 13) What is CommandCounterIncrement()?
_________________________________________________________________
1) What tools are available for developers?
src/include/storage/s_lock.h for your CPU. There is also a
src/makefiles directory for port-specific Makefile handling. There is
a backend/port directory if you need special files for your OS.
+
+ 13) What is CommandCounterIncrement()?
+
+ Normally, transactions can not see the rows they modify. This allows
+ UPDATE foo SET x = x + 1 to work correctly.
+
+ However, there are cases where a transactions needs to see rows
+ affected in previous parts of the transaction. This is accomplished
+ using a Command Counter. Incrementing the counter allows transactions
+ to be broken into pieces so each piece can see rows modified by
+ previous pieces. CommandCounterIncrement() increments the Command
+ Counter, creating a new piece of the transaction.
<a href="#10">10</a>) What is elog()?<BR>
<a href="#11">11</a>) What is configure all about?<BR>
<a href="#12">12</a>) How do I add a new port?<BR>
+<a href="#13">13</a>) What is CommandCounterIncrement()?<BR>
<BR>
<HR>
There is a <I>backend/port</I> directory if you need special files for
your OS.<P>
+<H3><a name="13">13</a>) What is CommandCounterIncrement()?</H3><P>
+
+Normally, transactions can not see the rows they modify. This allows <CODE>
+UPDATE foo SET x = x + 1</CODE> to work correctly.
+<P>
+
+However, there are cases where a transactions needs to see rows affected
+in previous parts of the transaction. This is accomplished using a
+Command Counter. Incrementing the counter allows transactions to be
+broken into pieces so each piece can see rows modified by previous
+pieces. <I>CommandCounterIncrement()</I> increments the Command
+Counter, creating a new piece of the transaction. <P>
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