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Chapter 39. PL/pgSQL -SQL Procedural Language
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Chapter 39. PL/pgSQL -SQL Procedural Language

Table of Contents

39.1. Overview

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

39.2. Structure ofPL/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 ofPL/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
39.6.7. Obtaining Execution Location Information

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

39.8.1. Reporting Errors and Messages
39.8.2. Checking Assertions

39.9. Trigger Procedures

39.9.1. Triggers on Data Changes
39.9.2. Triggers on Events

39.10.PL/pgSQL Under the Hood

39.10.1. Variable Substitution
39.10.2. Plan Caching

39.11. Tips for Developing inPL/pgSQL

39.11.1. Handling of Quotation Marks
39.11.2. Additional Compile-time Checks

39.12. Porting fromOracle PL/SQL

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

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38.1. Installing Procedural Languages	Up	39.1. Overview

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