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Chapter 40. PL/pgSQL -SQL Procedural Language
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Chapter 40. PL/pgSQL -SQL Procedural Language

Table of Contents

40.1. Overview

40.1.1. Advantages of UsingPL/pgSQL
40.1.2. Supported Argument and Result Data Types

40.2. Structure ofPL/pgSQL

40.3. Declarations

40.3.1. Declaring Function Parameters
40.3.2.ALIAS
40.3.3. Copying Types
40.3.4. Row Types
40.3.5. Record Types
40.3.6. Collation ofPL/pgSQL Variables

40.4. Expressions

40.5. Basic Statements

40.5.1. Assignment
40.5.2. Executing a Command With No Result
40.5.3. Executing a Query with a Single-row Result
40.5.4. Executing Dynamic Commands
40.5.5. Obtaining the Result Status
40.5.6. Doing Nothing At All

40.6. Control Structures

40.6.1. Returning From a Function
40.6.2. Conditionals
40.6.3. Simple Loops
40.6.4. Looping Through Query Results
40.6.5. Looping Through Arrays
40.6.6. Trapping Errors
40.6.7. Obtaining Execution Location Information

40.7. Cursors

40.7.1. Declaring Cursor Variables
40.7.2. Opening Cursors
40.7.3. Using Cursors
40.7.4. Looping Through a Cursor's Result

40.8. Errors and Messages

40.8.1. Reporting Errors and Messages
40.8.2. Checking Assertions

40.9. Trigger Procedures

40.9.1. Triggers on Data Changes
40.9.2. Triggers on Events

40.10.PL/pgSQL Under the Hood

40.10.1. Variable Substitution
40.10.2. Plan Caching

40.11. Tips for Developing inPL/pgSQL

40.11.1. Handling of Quotation Marks
40.11.2. Additional Compile-time Checks

40.12. Porting fromOracle PL/SQL

40.12.1. Porting Examples
40.12.2. Other Things to Watch For
40.12.3. Appendix

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39.1. Installing Procedural Languages	Home	40.1. Overview

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