Chapter 32. libpq — C Library
Table of Contents
- 32.1. Database Connection Control Functions
- 32.2. Connection Status Functions
- 32.3. Command Execution Functions
- 32.4. Asynchronous Command Processing
- 32.5. Pipeline Mode
- 32.6. Retrieving Query Results in Chunks
- 32.7. Canceling Queries in Progress
- 32.8. The Fast-Path Interface
- 32.9. Asynchronous Notification
- 32.10. Functions Associated with the
COPYCommand - 32.9. Asynchronous Notification
- 32.11. Control Functions
- 32.12. Miscellaneous Functions
- 32.13. Notice Processing
- 32.14. Event System
- 32.12. Miscellaneous Functions
- 32.15. Environment Variables
- 32.16. The Password File
- 32.17. The Connection Service File
- 32.18. LDAP Lookup of Connection Parameters
- 32.19. SSL Support
- 32.16. The Password File
- 32.20. Behavior in Threaded Programs
- 32.21. Buildinglibpq Programs
- 32.22. Example Programs
- 32.21. Buildinglibpq Programs
libpq is theC application programmer's interface toPostgreSQL.libpq is a set of library functions that allow client programs to pass queries to thePostgreSQL backend server and to receive the results of these queries. libpq is also the underlying engine for several otherPostgreSQL application interfaces, including those written for C++, Perl, Python, Tcl andECPG. So some aspects oflibpq's behavior will be important to you if you use one of those packages. In particular,Section 32.15,Section 32.16 andSection 32.19 describe behavior that is visible to the user of any application that useslibpq. Some short programs are included at the end of this chapter (Section 32.22) to show how to write programs that uselibpq. There are also several complete examples oflibpq applications in the directory Client programs that uselibpq must include the header filesrc/test/examples in the source code distribution.libpq-fe.h and must link with thelibpq library.