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fc22b6623b
This is an SQL-standard feature that allows creating columns that are computed from expressions rather than assigned, similar to a view or materialized view but on a column basis. This implements one kind of generated column: stored (computed on write). Another kind, virtual (computed on read), is planned for the future, and some room is left for it. Reviewed-by: Michael Paquier <michael@paquier.xyz> Reviewed-by: Pavel Stehule <pavel.stehule@gmail.com> Discussion: https://www.postgresql.org/message-id/flat/b151f851-4019-bdb1-699e-ebab07d2f40a@2ndquadrant.com
65 lines
3.1 KiB
Plaintext
65 lines
3.1 KiB
Plaintext
#----------------------------------------------------------------------
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#
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# pg_class.dat
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# Initial contents of the pg_class system catalog.
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#
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# Portions Copyright (c) 1996-2019, PostgreSQL Global Development Group
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# Portions Copyright (c) 1994, Regents of the University of California
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#
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# src/include/catalog/pg_class.dat
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#
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#----------------------------------------------------------------------
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[
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# Note: only bootstrap catalogs, ie those marked BKI_BOOTSTRAP, need to
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# have entries here. Be sure that the OIDs listed here match those given in
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# their CATALOG and BKI_ROWTYPE_OID macros, and that the relnatts values are
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# correct.
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# Note: "3" in the relfrozenxid column stands for FirstNormalTransactionId;
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# similarly, "1" in relminmxid stands for FirstMultiXactId
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{ oid => '1247',
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relname => 'pg_type', reltype => 'pg_type', relam => 'heap',
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relfilenode => '0', relpages => '0', reltuples => '0', relallvisible => '0',
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reltoastrelid => '0', relhasindex => 'f', relisshared => 'f',
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relpersistence => 'p', relkind => 'r', relnatts => '31', relchecks => '0',
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relhasrules => 'f', relhastriggers => 'f', relhassubclass => 'f',
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relrowsecurity => 'f', relforcerowsecurity => 'f', relispopulated => 't',
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relreplident => 'n', relispartition => 'f', relfrozenxid => '3',
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relminmxid => '1', relacl => '_null_', reloptions => '_null_',
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relpartbound => '_null_' },
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{ oid => '1249',
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relname => 'pg_attribute', reltype => 'pg_attribute', relam => 'heap',
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relfilenode => '0', relpages => '0', reltuples => '0', relallvisible => '0',
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reltoastrelid => '0', relhasindex => 'f', relisshared => 'f',
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relpersistence => 'p', relkind => 'r', relnatts => '25', relchecks => '0',
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relhasrules => 'f', relhastriggers => 'f', relhassubclass => 'f',
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relrowsecurity => 'f', relforcerowsecurity => 'f', relispopulated => 't',
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relreplident => 'n', relispartition => 'f', relfrozenxid => '3',
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relminmxid => '1', relacl => '_null_', reloptions => '_null_',
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relpartbound => '_null_' },
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{ oid => '1255',
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relname => 'pg_proc', reltype => 'pg_proc', relam => 'heap',
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relfilenode => '0', relpages => '0', reltuples => '0', relallvisible => '0',
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reltoastrelid => '0', relhasindex => 'f', relisshared => 'f',
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relpersistence => 'p', relkind => 'r', relnatts => '29', relchecks => '0',
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relhasrules => 'f', relhastriggers => 'f', relhassubclass => 'f',
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relrowsecurity => 'f', relforcerowsecurity => 'f', relispopulated => 't',
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relreplident => 'n', relispartition => 'f', relfrozenxid => '3',
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relminmxid => '1', relacl => '_null_', reloptions => '_null_',
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relpartbound => '_null_' },
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{ oid => '1259',
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relname => 'pg_class', reltype => 'pg_class', relam => 'heap',
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relfilenode => '0', relpages => '0', reltuples => '0', relallvisible => '0',
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reltoastrelid => '0', relhasindex => 'f', relisshared => 'f',
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relpersistence => 'p', relkind => 'r', relnatts => '33', relchecks => '0',
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relhasrules => 'f', relhastriggers => 'f', relhassubclass => 'f',
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relrowsecurity => 'f', relforcerowsecurity => 'f', relispopulated => 't',
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relreplident => 'n', relispartition => 'f', relfrozenxid => '3',
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relminmxid => '1', relacl => '_null_', reloptions => '_null_',
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relpartbound => '_null_' },
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]
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