Re: Parallel bitmap heap scan

From: Robert Haas <robertmhaas(at)gmail(dot)com>
To: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
Cc: Jeff Janes <jeff(dot)janes(at)gmail(dot)com>, Dilip Kumar <dilipbalaut(at)gmail(dot)com>, Thomas Munro <thomas(dot)munro(at)enterprisedb(dot)com>, Haribabu Kommi <kommi(dot)haribabu(at)gmail(dot)com>, Rafia Sabih <rafia(dot)sabih(at)enterprisedb(dot)com>, tushar <tushar(dot)ahuja(at)enterprisedb(dot)com>, Amit Khandekar <amitdkhan(dot)pg(at)gmail(dot)com>, Amit Kapila <amit(dot)kapila16(at)gmail(dot)com>, Andres Freund <andres(at)anarazel(dot)de>, pgsql-hackers <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: Parallel bitmap heap scan
Date: 2017-03-08 18:22:18
Message-ID: CA+Tgmob+=83-kz-JK4BcH2Z5MqkeiBTPpnF0VRJA-0erSJprMQ@mail.gmail.com
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On Wed, Mar 8, 2017 at 1:18 PM, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> wrote:
> Robert Haas <robertmhaas(at)gmail(dot)com> writes:
>> What I'm using is:
>
>> Configured with:
>> --prefix=/Applications/Xcode.app/Contents/Developer/usr
>> --with-gxx-include-dir=/usr/include/c++/4.2.1
>> Apple LLVM version 7.0.2 (clang-700.1.81)
>> Target: x86_64-apple-darwin14.5.0
>> Thread model: posix
>
> Hm. I noticed that longfin didn't spit up on it either, despite having
> -Werror turned on. That's a slightly newer version, but still Apple's
> clang:
>
> $ gcc -v
> Configured with: --prefix=/Applications/Xcode.app/Contents/Developer/usr --with-gxx-include-dir=/usr/include/c++/4.2.1
> Apple LLVM version 8.0.0 (clang-800.0.42.1)
> Target: x86_64-apple-darwin16.4.0
> Thread model: posix
> InstalledDir: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin

Yeah. I think on my previous MacBook Pro, you could do this without
generating a warning:

int x;
printf("%d\n", x);

The compiler on this one detects that case, but that seems to be about
as far as it goes.

--
Robert Haas
EnterpriseDB: http://www.enterprisedb.com
The Enterprise PostgreSQL Company

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