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Chapter 43. PL/pgSQL —SQL Procedural Language
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Chapter 43. PL/pgSQL —SQL Procedural Language

Table of Contents

43.1. Overview

43.1.1. Advantages of UsingPL/pgSQL
43.1.2. Supported Argument and Result Data Types

43.2. Structure ofPL/pgSQL

43.3. Declarations

43.3.1. Declaring Function Parameters
43.3.2.ALIAS
43.3.3. Copying Types
43.3.4. Row Types
43.3.5. Record Types
43.3.6. Collation ofPL/pgSQL Variables

43.4. Expressions

43.5. Basic Statements

43.5.1. Assignment
43.5.2. Executing SQL Commands
43.5.3. Executing a Command with a Single-Row Result
43.5.4. Executing Dynamic Commands
43.5.5. Obtaining the Result Status
43.5.6. Doing Nothing At All

43.6. Control Structures

43.6.1. Returning from a Function
43.6.2. Returning from a Procedure
43.6.3. Calling a Procedure
43.6.4. Conditionals
43.6.5. Simple Loops
43.6.6. Looping through Query Results
43.6.7. Looping through Arrays
43.6.8. Trapping Errors
43.6.9. Obtaining Execution Location Information

43.7. Cursors

43.7.1. Declaring Cursor Variables
43.7.2. Opening Cursors
43.7.3. Using Cursors
43.7.4. Looping through a Cursor's Result

43.8. Transaction Management

43.9. Errors and Messages

43.9.1. Reporting Errors and Messages
43.9.2. Checking Assertions

43.10. Trigger Functions

43.10.1. Triggers on Data Changes
43.10.2. Triggers on Events

43.11.PL/pgSQL under the Hood

43.11.1. Variable Substitution
43.11.2. Plan Caching

43.12. Tips for Developing inPL/pgSQL

43.12.1. Handling of Quotation Marks
43.12.2. Additional Compile-Time and Run-Time Checks

43.13. Porting fromOracle PL/SQL

43.13.1. Porting Examples
43.13.2. Other Things to Watch For
43.13.3. Appendix

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42.1. Installing Procedural Languages	Home	43.1. Overview

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