Message-ID: <47B5D9BE.7050002@encs.concordia.ca>
Date: Fri, 15 Feb 2008 13:28:14 -0500
From: Emi Lu <emilu@encs.concordia.ca>
Reply-To: emilu@encs.concordia.ca
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To: Pavel Stehule <pavel.stehule@gmail.com>
CC: =?UTF-8?B?IlJvZHJpZ28gRS4gRGUgTGXDs24gUGxpY2V0Ig==?= <rdeleonp@gmail.com>,
	PostgreSQL SQL List <pgsql-sql@postgresql.org>
Subject: Re: String function to Find how many times str2 is in str1?
References: <47B5B944.4010203@encs.concordia.ca>	
	<a55915760802150946t7cd4b0a6x7ba31f28c6948bff@mail.gmail.com>
	<162867790802151023i5a2276bj17f3f666aa4e6827@mail.gmail.com>
In-Reply-To: <162867790802151023i5a2276bj17f3f666aa4e6827@mail.gmail.com>
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Pavel Stehule wrote:
> Hello
> 
> what about
> 
> CREATE OR REPLACE FUNCTION Foobar(text, text)
> RETURNS integer AS $$
> SELECT array_upper(string_to_array($1,$2),1) - 1;
> $$ LANGUAGE SQL IMMUTABLE;
> 
> On 15/02/2008, Rodrigo E. De León Plicet <rdeleonp@gmail.com> wrote:
>> On Fri, Feb 15, 2008 at 11:09 AM, Emi Lu <emilu@encs.concordia.ca> wrote:
>>  >  Str1 = "test   test   caa   dtest   testing   EndofString";
>>  >  Str2 = "   ";
>>  >
>>  >  select funcName(Str1, Str2);
>>  >
>>  >  return 5
>>
>>
>> CREATE OR REPLACE FUNCTION
>>   FOOBAR(TEXT,TEXT)
>>  RETURNS INT AS $$
>>   SELECT(LENGTH($1) - LENGTH(REPLACE($1, $2, ''))) / LENGTH($2) ;
>>  $$ LANGUAGE SQL IMMUTABLE;
>>
>>  SELECT FOOBAR('test   test   caa   dtest   testing   EndofString', '   ');
>>
>>   foobar
>>  --------
>>       5
>>  (1 row)
>>
If there is not a system func for this, I will do this way.
Thank you for all inputs.
Ly