# High Performance PostgreSQL for Rails: Errata on page 177, First Printing

**URL:** <https://forum.devtalk.com/t/high-performance-postgresql-for-rails-errata-on-page-177-first-printing/160934>\
**Category:** PragProg Customers\
**Tags:** book-high-performance-postgresql-for-rails, errata\
**Created:** [4 July 2024 15:26 UTC](https://forum.devtalk.com/t/high-performance-postgresql-for-rails-errata-on-page-177-first-printing/160934 "2024-07-04T15:26:31Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![martinstreicher](https://forum.devtalk.com/user_avatar/forum.devtalk.com/martinstreicher/32/6357_2.png) [@martinstreicher](https://forum.devtalk.com/u/martinstreicher)\
**Post date:** [4 July 2024 15:26 UTC](https://forum.devtalk.com/t/high-performance-postgresql-for-rails-errata-on-page-177-first-printing/160934/1 "2024-07-04T15:26:31Z")

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Please use the following format for the title of this thread (then simply delete/replace this text with the content for the thread):

Title: High Performance PostgreSQL for Rails (p. 177)  
Example: Typo on page

Page 177 has the following sentence:

> For active deleted rows, since they represent the biggest proportion—the majority of rows—PostgreSQL would likely load the whole table with a sequential scan and then filter out the smaller proportion of soft-deleted rows.

The sentence should read: **For active rows** , since they represent the biggest proportion—the majority of rows—PostgreSQL would likely load the whole table with a sequential scan and then filter out the smaller proportion of soft-deleted rows.

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**Author:** ![andatki](https://forum.devtalk.com/user_avatar/forum.devtalk.com/andatki/32/5332_2.png) [@andatki](https://forum.devtalk.com/u/andatki)\
**Post date:** [2 May 2025 20:25 UTC](https://forum.devtalk.com/t/high-performance-postgresql-for-rails-errata-on-page-177-first-printing/160934/2 "2025-05-02T20:25:32Z")

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Thanks for noticing this and reporting it @martinstreicher. I’ve just submitted a correction to remove the word “deleted” from this line here. Hopefully it makes it into an upcoming print version soon.

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**Author:** ![andatki](https://forum.devtalk.com/user_avatar/forum.devtalk.com/andatki/32/5332_2.png) [@andatki](https://forum.devtalk.com/u/andatki)\
**Post date:** [12 July 2025 03:21 UTC](https://forum.devtalk.com/t/high-performance-postgresql-for-rails-errata-on-page-177-first-printing/160934/3 "2025-07-12T03:21:51Z")

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