From: Tom Lane <tgl@sss.pgh.pa.us>
To: zoulx1982@163.com
Cc: pgsql-bugs@lists.postgresql.org
Subject: Re: BUG #19104: Does regexp_substr function support non-greedy matching?
Date: Wed, 05 Nov 2025 09:49:56 -0500
Message-ID: <812834.1762354196@sss.pgh.pa.us> (raw)
In-Reply-To: <19104-c9e08a2693264d98@postgresql.org>
References: <19104-c9e08a2693264d98@postgresql.org>
PG Bug reporting form <noreply@postgresql.org> writes:
> When i use regexp_substr to process some text file, i found regexp_substr
> does not support non-greedy match.
Sure it does. But the details of the behavior are different from
Perl's engine in cases where you have both greedy and non-greedy
quantifiers (as your example does). Read the greediness rules here:
https://www.postgresql.org/docs/current/functions-matching.html#POSIX-MATCHING-RULES
regards, tom lane
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To: pgsql-bugs@postgresql.org
Cc: tgl@sss.pgh.pa.us, zoulx1982@163.com, pgsql-bugs@lists.postgresql.org
Subject: Re: BUG #19104: Does regexp_substr function support non-greedy matching?
In-Reply-To: <812834.1762354196@sss.pgh.pa.us>
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