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PostgreSQL 11 Server Side Programming Quick Start Guide

You're reading from   PostgreSQL 11 Server Side Programming Quick Start Guide Effective database programming and interaction

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Product type Paperback
Published in Nov 2018
Publisher
ISBN-13 9781789342222
Length 260 pages
Edition 1st Edition
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Author (1):
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Luca Ferrari Luca Ferrari
Author Profile Icon Luca Ferrari
Luca Ferrari
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Table of Contents (12) Chapters Close

Executing dynamic statements

Non-PL/pgSQL statements are sent to the server engine as regular SQL statements. A few examples in the previous sections have already performed some queries within code blocks. It is possible for a code block to construct an SQL statement dynamically to be executed by the server engine. This can be achieved using the EXECUTE statement.

An EXECUTE statement is made of three parts:

  • A mandatory query string, which represents the SQL statement that will be executed
  • An optional INTO (or INTO STRICT) clause, which allows us to store values from the previous statement in variables
  • An optional USING clause, which provides positional values for parameter substitution

The query string will not be interpolated, which means that no variable substitution will be performed on it. In order to insert variable values into a query string, we must use special positional...

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