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Commit0d692a0

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Basic foreign table support.
Foreign tables are a core component of SQL/MED. This commit doesnot provide a working SQL/MED infrastructure, because foreign tablescannot yet be queried. Support for foreign table scans will need tobe added in a future patch. However, this patch creates the necessarysystem catalog structure, syntax support, and support for ancillaryoperations such as COMMENT and SECURITY LABEL.Shigeru Hanada, heavily revised by Robert Haas
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69 files changed

+2275
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lines changed

‎contrib/pageinspect/rawpage.c

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Original file line numberDiff line numberDiff line change
@@ -119,6 +119,11 @@ get_raw_page_internal(text *relname, ForkNumber forknum, BlockNumber blkno)
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(errcode(ERRCODE_WRONG_OBJECT_TYPE),
120120
errmsg("cannot get raw page from composite type \"%s\"",
121121
RelationGetRelationName(rel))));
122+
if (rel->rd_rel->relkind==RELKIND_FOREIGN_TABLE)
123+
ereport(ERROR,
124+
(errcode(ERRCODE_WRONG_OBJECT_TYPE),
125+
errmsg("cannot get raw page from foreign table \"%s\"",
126+
RelationGetRelationName(rel))));
122127

123128
/*
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* Reject attempts to read non-local temporary relations; we would be

‎contrib/pgstattuple/pgstattuple.c

Lines changed: 3 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -242,6 +242,9 @@ pgstat_relation(Relation rel, FunctionCallInfo fcinfo)
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caseRELKIND_COMPOSITE_TYPE:
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err="composite type";
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break;
245+
caseRELKIND_FOREIGN_TABLE:
246+
err="foreign table";
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break;
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default:
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err="unknown";
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break;

‎doc/src/sgml/catalogs.sgml

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Original file line numberDiff line numberDiff line change
@@ -148,6 +148,11 @@
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<entry>foreign server definitions</entry>
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</row>
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<row>
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<entry><link linkend="catalog-pg-foreign-table"><structname>pg_foreign_table</structname></link></entry>
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<entry>additional foreign table information</entry>
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</row>
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151156
<row>
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<entry><link linkend="catalog-pg-index"><structname>pg_index</structname></link></entry>
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<entry>additional index information</entry>
@@ -1656,8 +1661,8 @@
16561661
<entry>
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<literal>r</> = ordinary table, <literal>i</> = index,
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<literal>S</> = sequence, <literal>v</> = view, <literal>c</> =
1659-
composite type, <literal>t</> = TOAST
1660-
table
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composite type, <literal>t</> = TOAST table,
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<literal>f</> = foreigntable
16611666
</entry>
16621667
</row>
16631668

@@ -2932,6 +2937,61 @@
29322937
</sect1>
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29342939

2940+
<sect1 id="catalog-pg-foreign-table">
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<title><structname>pg_foreign_table</structname></title>
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2943+
<indexterm zone="catalog-pg-foreign-table">
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<primary>pg_foreign_table</primary>
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</indexterm>
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<para>
2948+
The catalog <structname>pg_foreign_table</structname> contains part
2949+
of the information about foreign tables.
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The rest is mostly in <structname>pg_class</structname>.
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</para>
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<table>
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<title><structname>pg_foreign_table</> Columns</title>
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<tgroup cols="4">
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<thead>
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<row>
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<entry>Name</entry>
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<entry>Type</entry>
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<entry>References</entry>
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<entry>Description</entry>
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</row>
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</thead>
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<tbody>
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<row>
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<entry><structfield>ftrelid</structfield></entry>
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<entry><type>oid</type></entry>
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<entry><literal><link linkend="catalog-pg-class"><structname>pg_class</structname></link>.oid</literal></entry>
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<entry>The OID of the <structname>pg_class</> entry for this foreign table</entry>
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</row>
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<row>
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<entry><structfield>ftserver</structfield></entry>
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<entry><type>oid</type></entry>
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<entry><literal><link linkend="catalog-pg-foreign-server"><structname>pg_foreign_server</structname></link>.oid</literal></entry>
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<entry>The OID of the foreign server for this foreign table</entry>
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</row>
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2981+
<row>
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<entry><structfield>ftoptions</structfield></entry>
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<entry><type>text[]</type></entry>
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<entry></entry>
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<entry>
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Foreign table options, as <quote>keyword=value</> strings.
2987+
</entry>
2988+
</row>
2989+
</tbody>
2990+
</tgroup>
2991+
</table>
2992+
</sect1>
2993+
2994+
29352995
<sect1 id="catalog-pg-index">
29362996
<title><structname>pg_index</structname></title>
29372997

‎doc/src/sgml/information_schema.sgml

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Original file line numberDiff line numberDiff line change
@@ -2384,6 +2384,132 @@ ORDER BY c.ordinal_position;
23842384
</table>
23852385
</sect1>
23862386

2387+
<sect1 id="infoschema-foreign-table-options">
2388+
<title><literal>foreign_table_options</literal></title>
2389+
2390+
<para>
2391+
The view <literal>foreign_table_options</literal> contains all the
2392+
options defined for foreign tables in the current database. Only
2393+
those foreign tables are shown that the current user has access to
2394+
(by way of being the owner or having some privilege).
2395+
</para>
2396+
2397+
<table>
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<title><literal>foreign_table_options</literal> Columns</title>
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2400+
<tgroup cols="3">
2401+
<thead>
2402+
<row>
2403+
<entry>Name</entry>
2404+
<entry>Data Type</entry>
2405+
<entry>Description</entry>
2406+
</row>
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</thead>
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2409+
<tbody>
2410+
<row>
2411+
<entry><literal>foreign_table_catalog</literal></entry>
2412+
<entry><type>sql_identifier</type></entry>
2413+
<entry>Name of the database that contains the foreign table (always the current database)</entry>
2414+
</row>
2415+
2416+
<row>
2417+
<entry><literal>foreign_table_schema</literal></entry>
2418+
<entry><type>sql_identifier</type></entry>
2419+
<entry>Name of the schema that contains the foreign table</entry>
2420+
</row>
2421+
2422+
<row>
2423+
<entry><literal>foreign_table_name</literal></entry>
2424+
<entry><type>sql_identifier</type></entry>
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<entry>Name of the foreign table</entry>
2426+
</row>
2427+
2428+
<row>
2429+
<entry><literal>foreign_server_catalog</literal></entry>
2430+
<entry><type>sql_identifier</type></entry>
2431+
<entry>Name of the database that the foreign server is defined in (always the current database)</entry>
2432+
</row>
2433+
2434+
<row>
2435+
<entry><literal>foreign_server_name</literal></entry>
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<entry><type>sql_identifier</type></entry>
2437+
<entry>Name of the foreign server</entry>
2438+
</row>
2439+
2440+
<row>
2441+
<entry><literal>option_name</literal></entry>
2442+
<entry><type>sql_identifier</type></entry>
2443+
<entry>Name of an option</entry>
2444+
</row>
2445+
2446+
<row>
2447+
<entry><literal>option_value</literal></entry>
2448+
<entry><type>character_data</type></entry>
2449+
<entry>Value of the option</entry>
2450+
</row>
2451+
</tbody>
2452+
</tgroup>
2453+
</table>
2454+
</sect1>
2455+
2456+
<sect1 id="infoschema-foreign-tables">
2457+
<title><literal>foreign_tables</literal></title>
2458+
2459+
<para>
2460+
The view <literal>foreign_tables</literal> contains all foreign
2461+
tables defined in the current database. Only those foreign
2462+
tables are shown that the current user has access to (by way of
2463+
being the owner or having some privilege).
2464+
</para>
2465+
2466+
<table>
2467+
<title><literal>foreign_tables</literal> Columns</title>
2468+
2469+
<tgroup cols="3">
2470+
<thead>
2471+
<row>
2472+
<entry>Name</entry>
2473+
<entry>Data Type</entry>
2474+
<entry>Description</entry>
2475+
</row>
2476+
</thead>
2477+
2478+
<tbody>
2479+
<row>
2480+
<entry><literal>foreign_table_catalog</literal></entry>
2481+
<entry><type>sql_identifier</type></entry>
2482+
<entry>Name of the database that the foreign table is defined in (always the current database)</entry>
2483+
</row>
2484+
2485+
<row>
2486+
<entry><literal>foreign_table_schema</literal></entry>
2487+
<entry><type>sql_identifier</type></entry>
2488+
<entry>Name of the schema that contains the foreign table</entry>
2489+
</row>
2490+
2491+
<row>
2492+
<entry><literal>foreign_table_name</literal></entry>
2493+
<entry><type>sql_identifier</type></entry>
2494+
<entry>Name of the foreign table</entry>
2495+
</row>
2496+
2497+
<row>
2498+
<entry><literal>foreign_server_catalog</literal></entry>
2499+
<entry><type>sql_identifier</type></entry>
2500+
<entry>Name of the database that the foreign server is defined in (always the current database)</entry>
2501+
</row>
2502+
2503+
<row>
2504+
<entry><literal>foreign_server_name</literal></entry>
2505+
<entry><type>sql_identifier</type></entry>
2506+
<entry>Name of the foreign server</entry>
2507+
</row>
2508+
</tbody>
2509+
</tgroup>
2510+
</table>
2511+
</sect1>
2512+
23872513
<sect1 id="infoschema-key-column-usage">
23882514
<title><literal>key_column_usage</literal></title>
23892515

@@ -4730,8 +4856,9 @@ ORDER BY c.ordinal_position;
47304856
<entry>
47314857
Type of the table: <literal>BASE TABLE</literal> for a
47324858
persistent base table (the normal table type),
4733-
<literal>VIEW</literal> for a view, or <literal>LOCAL
4734-
TEMPORARY</literal> for a temporary table
4859+
<literal>VIEW</literal> for a view, <literal>FOREIGN TABLE</literal>
4860+
for a foreign table, or
4861+
<literal>LOCAL TEMPORARY</literal> for a temporary table
47354862
</entry>
47364863
</row>
47374864

‎doc/src/sgml/ref/allfiles.sgml

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Original file line numberDiff line numberDiff line change
@@ -12,6 +12,7 @@ Complete list of usable sgml source files in this directory.
1212
<!entity alterDefaultPrivileges system "alter_default_privileges.sgml">
1313
<!entity alterDomain system "alter_domain.sgml">
1414
<!entity alterForeignDataWrapper system "alter_foreign_data_wrapper.sgml">
15+
<!entity alterForeignTable system "alter_foreign_table.sgml">
1516
<!entity alterFunction system "alter_function.sgml">
1617
<!entity alterGroup system "alter_group.sgml">
1718
<!entity alterIndex system "alter_index.sgml">
@@ -50,6 +51,7 @@ Complete list of usable sgml source files in this directory.
5051
<!entity createDatabase system "create_database.sgml">
5152
<!entity createDomain system "create_domain.sgml">
5253
<!entity createForeignDataWrapper system "create_foreign_data_wrapper.sgml">
54+
<!entity createForeignTable system "create_foreign_table.sgml">
5355
<!entity createFunction system "create_function.sgml">
5456
<!entity createGroup system "create_group.sgml">
5557
<!entity createIndex system "create_index.sgml">
@@ -85,6 +87,7 @@ Complete list of usable sgml source files in this directory.
8587
<!entity dropDatabase system "drop_database.sgml">
8688
<!entity dropDomain system "drop_domain.sgml">
8789
<!entity dropForeignDataWrapper system "drop_foreign_data_wrapper.sgml">
90+
<!entity dropForeignTable system "drop_foreign_table.sgml">
8891
<!entity dropFunction system "drop_function.sgml">
8992
<!entity dropGroup system "drop_group.sgml">
9093
<!entity dropIndex system "drop_index.sgml">

‎doc/src/sgml/ref/alter_default_privileges.sgml

Lines changed: 2 additions & 2 deletions
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@@ -71,8 +71,8 @@ REVOKE [ GRANT OPTION FOR ]
7171
<command>ALTER DEFAULT PRIVILEGES</> allows you to set the privileges
7272
that will be applied to objects created in the future. (It does not
7373
affect privileges assigned to already-existing objects.) Currently,
74-
only the privileges for tables (including views), sequences,and
75-
functions can be altered.
74+
only the privileges for tables (including viewsand foreign tables),
75+
sequences, andfunctions can be altered.
7676
</para>
7777

7878
<para>

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