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Re: ask for review of MERGE

From: Robert Haas <robertmhaas(at)gmail(dot)com>
To: Greg Smith <greg(at)2ndquadrant(dot)com>
Cc: Boxuan Zhai <bxzhai2010(at)gmail(dot)com>, pgsql-hackers(at)postgresql(dot)org
Subject: Re: ask for review of MERGE
Date: 2010-09-29 13:16:38
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Lists: pgsql-hackers
On Wed, Sep 29, 2010 at 2:44 AM, Greg Smith <greg(at)2ndquadrant(dot)com> wrote:
> One compiler warning I noticed that needs to get resolved:
> src/backend/commands/explain.c:
> explain.c: In function ‘ExplainMergeActions’:
> explain.c:1528: warning: comparison of distinct pointer types lacks a cast
> That is complaining about this section:
> if (mt_planstate->operation != CMD_MERGE ||
> mt_planstate->mt_mergeActPstates == NIL)
> return;
> So presumably that comparison with NIL needs a cast. Once I get more
> familiar with the code I'll fix that myself if Boxuan doesn't offer a
> suggestion first.

Possibly NULL was meant instead of NIL.  NIL is specifically for a List.

Robert Haas
The Enterprise Postgres Company

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