19. "C", "C++", ESQL/C language Interfaces and Bitwise Operators for PostgreSQL

19.1 "C" interface

It is included in distribution and is called 'libpq'. Similar to Oracle OCI, Sybase DB-lib, Informix CLI libraries.

19.2 "C++" interface

It is included in distribution and is called 'libpq++'. See the section - Testing C and C++ PostgreSQL interface

19.3 ESQL/C

ESQL/C 'Embedded C Pre-compiler' for PostgreSQL ESQL/C is like Oracle Pro*C, Informix ESQL/C. The PostgreSQL ESQL/C is an SQL application-programming interface (API) enables the C programmer to create custom applications with database-management capabilities. The PostgreSQL ESQL/C allows you to use a third-generation language with which you are familiar and still take advantage of the Structured Query Language (SQL).

ESQL/C consists of the following pieces of software:

• The ESQL/C libraries of C functions provide access to the database server.
• The ESQL/C header files provide definitions for the data structures, constants, and macros useful to the ESQL/C program.
• The ESQL/C preprocessor, is a source-code preprocessor that converts a C file containing SQL statements into an executable file.

• ESQL/C for PostgreSQL is already included in the distribution.
• Main site ftp://ftp.lysator.liu.se/pub/linus
• Email : linus@epact.se

19.4 BitWise Operators for PostgreSQL

Bitwise operators was written by Nicolas Moldavsky

• nico@overnet.com.ar

• ftp://ftp.overnet.com.ar/pub/utils/linux/bitpgsql.tgz