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Add how to get database/user listing information.

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Bruce Momjian
2002-04-18 04:45:11 +00:00
parent cfa72faf96
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doc/FAQ
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Frequently Asked Questions (FAQ) for PostgreSQL
Last updated: Wed Apr 17 22:48:04 EDT 2002
Last updated: Thu Apr 18 00:44:51 EDT 2002
Current maintainer: Bruce Momjian (pgman@candle.pha.pa.us)
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4.5) What is the maximum size for a row, a table, and a database?
4.6) How much database disk space is required to store data from a
typical text file?
4.7) How do I find out what tables or indexes are defined in the
database?
4.7) How do I find out what tables, indexes, databases, and users are
defined?
4.8) My queries are slow or don't make use of the indexes. Why?
4.9) How do I see how the query optimizer is evaluating my query?
4.10) What is an R-tree index?
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Indexes do not require as much overhead, but do contain the data that
is being indexed, so they can be large also.
4.7) How do I find out what tables or indexes are defined in the database?
4.7) How do I find out what tables, indexes, databases, and users are
defined?
psql has a variety of backslash commands to show such information. Use
\? to see them.
\? to see them. There are also system tables beginning with pg_ that
describe these too. Also, psql -l will list all databases.
Also try the file pgsql/src/tutorial/syscat.source. It illustrates
many of the SELECTs needed to get information from the database system