PL/pgSQL - SQL Procedural Language

PostgreSQL 9.1.2 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
  39.3.6. Collation of PL/pgSQL Variables
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. Looping Through Arrays
  39.6.6. 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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