Notes
Note:
Not all functions are supported by all builds. It depends on your
libpq (The PostgreSQL C client library) version and how libpq is
compiled. If PHP PostgreSQL extensions are missing, then it is because
your libpq version does not support them.
Note:
Most PostgreSQL functions accept connection
as
the optional first parameter. If it is not provided, the last opened
connection is used. If it doesn't exist, functions return false
.
Note:
PostgreSQL automatically folds all identifiers (e.g. table/column names)
to lower-case values at object creation time and at query time.
To force the use of mixed or upper case identifiers, you must escape
the identifier using double quotes ("").
Note:
PostgreSQL does not have special commands for fetching database schema
information (eg. all the tables in the current database). Instead, there
is a standard schema named information_schema
in
PostgreSQL 7.4 and above containing
system views with all the necessary information, in an easily
queryable form. See the » PostgreSQL Documentation
for full details.