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PostgreSQL 9.0.23 Documentation
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Chapter 39. PL/pgSQL - SQL Procedural Language

Table of Contents

39.1. Overview

39.1.1. Advantages of Using PL/pgSQL
39.1.2. Supported Argument and Result Data Types

39.2. Structure of PL/pgSQL

39.3. Declarations

39.3.1. Declaring Function Parameters
39.3.2. ALIAS
39.3.3. Copying Types
39.3.4. Row Types
39.3.5. Record Types

39.4. Expressions

39.5. Basic Statements

39.5.1. Assignment
39.5.2. Executing a Command With No Result
39.5.3. Executing a Query with a Single-Row Result
39.5.4. Executing Dynamic Commands
39.5.5. Obtaining the Result Status
39.5.6. Doing Nothing At All

39.6. Control Structures

39.6.1. Returning From a Function
39.6.2. Conditionals
39.6.3. Simple Loops
39.6.4. Looping Through Query Results
39.6.5. Trapping Errors

39.7. Cursors

39.7.1. Declaring Cursor Variables
39.7.2. Opening Cursors
39.7.3. Using Cursors
39.7.4. Looping Through a Cursor's Result

39.8. Errors and Messages

39.9. Trigger Procedures

39.10. PL/pgSQL Under the Hood

39.10.1. Variable Substitution
39.10.2. Plan Caching

39.11. Tips for Developing in PL/pgSQL

39.12. Porting from Oracle PL/SQL

39.12.1. Porting Examples
39.12.2. Other Things to Watch For
39.12.3. Appendix

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