PL/pgSQL - SQL Procedural Language
- Table of Contents
- 41.1. Overview
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- 41.1.1. Advantages of Using PL/pgSQL
- 41.1.2. Supported Argument and Result Data Types
- 41.2. Structure of PL/pgSQL
- 41.3. Declarations
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- 41.3.1. Declaring Function Parameters
- 41.3.2. ALIAS
- 41.3.3. Copying Types
- 41.3.4. Row Types
- 41.3.5. Record Types
- 41.3.6. Collation of PL/pgSQL Variables
- 41.4. Expressions
- 41.5. Basic Statements
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- 41.5.1. Assignment
- 41.5.2. Executing a Command With No Result
- 41.5.3. Executing a Query with a Single-row Result
- 41.5.4. Executing Dynamic Commands
- 41.5.5. Obtaining the Result Status
- 41.5.6. Doing Nothing At All
- 41.6. Control Structures
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- 41.6.1. Returning From a Function
- 41.6.2. Conditionals
- 41.6.3. Simple Loops
- 41.6.4. Looping Through Query Results
- 41.6.5. Looping Through Arrays
- 41.6.6. Trapping Errors
- 41.6.7. Obtaining Execution Location Information
- 41.7. Cursors
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- 41.7.1. Declaring Cursor Variables
- 41.7.2. Opening Cursors
- 41.7.3. Using Cursors
- 41.7.4. Looping Through a Cursor's Result
- 41.8. Errors and Messages
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- 41.8.1. Reporting Errors and Messages
- 41.8.2. Checking Assertions
- 41.9. Trigger Procedures
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- 41.9.1. Triggers on Data Changes
- 41.9.2. Triggers on Events
- 41.10. PL/pgSQL Under the Hood
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- 41.10.1. Variable Substitution
- 41.10.2. Plan Caching
- 41.11. Tips for Developing in PL/pgSQL
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- 41.11.1. Handling of Quotation Marks
- 41.11.2. Additional Compile-time Checks
- 41.12. Porting from Oracle PL/SQL
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- 41.12.1. Porting Examples
- 41.12.2. Other Things to Watch For
- 41.12.3. Appendix