pg_hint_plan16 1.6.0

This Release
pg_hint_plan16 1.6.0
Date
Status
Stable
Abstract
Query hints in SQL comments
Description
This library adds support for query hints in SQL comments in PostgreSQL 16.
Released By
michaelpq
License
BSD
Resources
Special Files
Tags

Extensions

pg_hint_plan 1.6.0
Query hints in SQL comments

Documentation

index
pg_hint_plan 1.6
synopsis
Synopsis
description
Description
uninstallation
Uninstallation
functional_limitations
Functional limitations
errors
Errors
hint_list
Hint list
hint_table
The hint table
requirements
Requirements
installation
Installation
hint_details
Details in hinting

README

Contents

pg_hint_plan 1.6

pg_hint_plan makes it possible to tweak PostgreSQL execution plans using so-called "hints" in SQL comments, like /*+ SeqScan(a) */.

PostgreSQL uses a cost-based optimizer, which utilizes data statistics, not static rules. The planner (optimizer) esitimates costs of each possible execution plans for a SQL statement then the execution plan with the lowest cost finally be executed. The planner does its best to select the best best execution plan, but is not always perfect, since it doesn't count some properties of the data, for example, correlation between columns.

For more details, please see the various documentations available in the docs/ directory:

  1. Description
  2. The hint table
  3. Installation
  4. Unistallation
  5. Details in hinting
  6. Errors
  7. Functional limitations
  8. Requirements
  9. Hints list

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