The examples in this section can be found in complex.sql and complex.c in the src/tutorial directory of the source distribution. See the README file in that directory for instructions about running the examples.
im still unsure, where to look. can anyone solve my prob?
In the source distribution (.tar.gz or .bz2) - the one you'd use to compile PostgreSQL from scratch. Untar it, and you'll see src/tutorial directories.
-- Richard Huxton Archonet Ltd
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TIP 9: the planner will ignore your desire to choose an index scan if your
joining column's datatypes do not match
