Обсуждение: Full Text Search

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Full Text Search

От
PG Doc comments form
Дата:
The following documentation comment has been logged on the website:

Page: https://www.postgresql.org/docs/14/textsearch-limitations.html
Description:

Hello,

In the FTS/Limitations part of the documentation, it says :

"Another example — the PostgreSQL mailing list archives contained 910,989
unique words with 57,491,343 lexemes in 461,020 messages."

How could the number of lexemes be greater than unique words ?

Thank you
Julien

Re: Full Text Search

От
"David G. Johnston"
Дата:
On Sun, Oct 29, 2023, 13:58 PG Doc comments form <noreply@postgresql.org> wrote:
The following documentation comment has been logged on the website:

Page: https://www.postgresql.org/docs/14/textsearch-limitations.html
Description:

Hello,

In the FTS/Limitations part of the documentation, it says :

"Another example — the PostgreSQL mailing list archives contained 910,989
unique words with 57,491,343 lexemes in 461,020 messages."

How could the number of lexemes be greater than unique words ?



Note the part with the hyphenated word example.

David J.

Re: Full Text Search

От
Julien Champalbert
Дата:
Thank you David for your response, it makes sense now.

Julien 

Le 29 oct. 2023 à 22:02, David G. Johnston <david.g.johnston@gmail.com> a écrit :

On Sun, Oct 29, 2023, 13:58 PG Doc comments form <noreply@postgresql.org> wrote:
The following documentation comment has been logged on the website:

Page: https://www.postgresql.org/docs/14/textsearch-limitations.html
Description:

Hello,

In the FTS/Limitations part of the documentation, it says :

"Another example — the PostgreSQL mailing list archives contained 910,989
unique words with 57,491,343 lexemes in 461,020 messages."

How could the number of lexemes be greater than unique words ?



Note the part with the hyphenated word example.

David J.