Re: Passing query string to workers

From: Kuntal Ghosh <kuntalghosh(dot)2007(at)gmail(dot)com>
To: Rafia Sabih <rafia(dot)sabih(at)enterprisedb(dot)com>
Cc: Robert Haas <robertmhaas(at)gmail(dot)com>, Amit Kapila <amit(dot)kapila16(at)gmail(dot)com>, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, PostgreSQL Developers <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: Passing query string to workers
Date: 2017-02-20 15:05:15
Message-ID: CAGz5QCLVp+pbRSSp8P-pmVdhPXEe493JjEjixZVrmGB9mU5LQA@mail.gmail.com
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On Mon, Feb 20, 2017 at 10:11 AM, Rafia Sabih
<rafia(dot)sabih(at)enterprisedb(dot)com> wrote:
> On Sun, Feb 19, 2017 at 10:11 PM, Robert Haas <robertmhaas(at)gmail(dot)com> wrote:
>> + query_data = (char *) palloc0(strlen(estate->es_queryString) + 1);
>> + strcpy(query_data, estate->es_queryString);
>>
>> It's unnecessary to copy the query string here; you're going to use it
>> later on in the very same function. That code can just refer to
>> estate->es_queryString directly.
>
>
> Done.
+ char *query_data;
+ query_data = estate->es_sourceText;
estate->es_sourceText is a const char* variable. Assigning this const
pointer to a non-const pointer violates the rules
constant-correctness. So, either you should change query_data as const
char*, or as Robert suggested, you can directly use
estate->es_sourceText.

--
Thanks & Regards,
Kuntal Ghosh
EnterpriseDB: http://www.enterprisedb.com

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