Chapter 35. Large Objects

Chapter 35. Large Objects
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Table of Contents

35.3.1. Creating a Large Object
35.3.2. Importing a Large Object
35.3.3. Exporting a Large Object
35.3.4. Opening an Existing Large Object
35.3.5. Writing Data to a Large Object
35.3.6. Reading Data from a Large Object
35.3.7. Seeking in a Large Object
35.3.8. Obtaining the Seek Position of a Large Object
35.3.9. Truncating a Large Object
35.3.10. Closing a Large Object Descriptor
35.3.11. Removing a Large Object

+ PostgreSQL has a large object + facility, which provides stream-style access to user data that is stored + in a special large-object structure. Streaming access is useful + when working with data values that are too large to manipulate + conveniently as a whole. +

+ This chapter describes the implementation and the programming and + query language interfaces to PostgreSQL + large object data. We use the libpq C + library for the examples in this chapter, but most programming + interfaces native to PostgreSQL support + equivalent functionality. Other interfaces might use the large + object interface internally to provide generic support for large + values. This is not described here. +

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