PostgreSQL 8.4.2 Documentation
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# Chapter 38. PL/pgSQL - SQL Procedural Language

Table of Contents
38.1. Overview
  38.1.1. Advantages of Using PL/pgSQL
  38.1.2. Supported Argument and Result Data Types
38.2. Structure of PL/pgSQL
38.3. Declarations
  38.3.1. Aliases for Function Parameters
  38.3.2. Copying Types
  38.3.3. Row Types
  38.3.4. Record Types
  38.3.5. `RENAME`
38.4. Expressions
38.5. Basic Statements
  38.5.1. Assignment
  38.5.2. Executing a Command With No Result
  38.5.3. Executing a Query with a Single-Row Result
  38.5.4. Executing Dynamic Commands
  38.5.5. Obtaining the Result Status
  38.5.6. Doing Nothing At All
38.6. Control Structures
  38.6.1. Returning From a Function
  38.6.2. Conditionals
  38.6.3. Simple Loops
  38.6.4. Looping Through Query Results
  38.6.5. Trapping Errors
38.7. Cursors
  38.7.1. Declaring Cursor Variables
  38.7.2. Opening Cursors
  38.7.3. Using Cursors
  38.7.4. Looping Through a Cursor's Result
38.8. Errors and Messages
38.9. Trigger Procedures
38.10. PL/pgSQL Under the Hood
  38.10.1. Variable Substitution
  38.10.2. Plan Caching
38.11. Tips for Developing in PL/pgSQL
38.12. Porting from Oracle PL/SQL
  38.12.1. Porting Examples
  38.12.2. Other Things to Watch For
  38.12.3. Appendix

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