Postpone calls of unsafe server-side functions in pg_dump.
Avoid calling pg_get_partkeydef(), pg_get_expr(relpartbound),
and regtypeout until we have lock on the relevant tables.
The existing coding is at serious risk of failure if there
are any concurrent DROP TABLE commands going on --- including
drops of other sessions' temp tables.
Back-patch of commit e3fcbbd62
. That's been in v15/HEAD long enough
to have some confidence about it, so now let's fix the problem in
older branches.
Original patch by me; thanks to Gilles Darold for back-patching
legwork.
Discussion: https://postgr.es/m/2273648.1634764485@sss.pgh.pa.us
Discussion: https://postgr.es/m/7d7eb6128f40401d81b3b7a898b6b4de@W2012-02.nidsa.loc
Discussion: https://postgr.es/m/45c93d57-9973-248e-d2df-e02ca9af48d4@darold.net
This commit is contained in:
parent
038512f71e
commit
55f30e6c76
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@ -6322,14 +6322,15 @@ getTables(Archive *fout, int *numTables)
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int i_foreignserver;
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int i_is_identity_sequence;
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int i_changed_acl;
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int i_partkeydef;
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int i_ispartition;
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int i_partbound;
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int i_amname;
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/*
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* Find all the tables and table-like objects.
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*
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* We must fetch all tables in this phase because otherwise we cannot
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* correctly identify inherited columns, owned sequences, etc.
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*
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* We include system catalogs, so that we can work if a user table is
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* defined to inherit from a system catalog (pretty weird, but...)
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*
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@ -6343,8 +6344,10 @@ getTables(Archive *fout, int *numTables)
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*
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* Note: in this phase we should collect only a minimal amount of
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* information about each table, basically just enough to decide if it is
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* interesting. We must fetch all tables in this phase because otherwise
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* we cannot correctly identify inherited columns, owned sequences, etc.
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* interesting. In particular, since we do not yet have lock on any user
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* table, we MUST NOT invoke any server-side data collection functions
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* (for instance, pg_get_partkeydef()). Those are likely to fail or give
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* wrong answers if any concurrent DDL is happening.
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*
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* We purposefully ignore toast OIDs for partitioned tables; the reason is
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* that versions 10 and 11 have them, but 12 does not, so emitting them
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@ -6353,9 +6356,7 @@ getTables(Archive *fout, int *numTables)
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if (fout->remoteVersion >= 90600)
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{
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char *partkeydef = "NULL";
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char *ispartition = "false";
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char *partbound = "NULL";
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char *relhasoids = "c.relhasoids";
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PQExpBuffer acl_subquery = createPQExpBuffer();
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@ -6372,13 +6373,8 @@ getTables(Archive *fout, int *numTables)
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* Collect the information about any partitioned tables, which were
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* added in PG10.
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*/
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if (fout->remoteVersion >= 100000)
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{
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partkeydef = "pg_get_partkeydef(c.oid)";
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ispartition = "c.relispartition";
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partbound = "pg_get_expr(c.relpartbound, c.oid)";
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}
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/* In PG12 upwards WITH OIDS does not exist anymore. */
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if (fout->remoteVersion >= 120000)
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@ -6419,7 +6415,7 @@ getTables(Archive *fout, int *numTables)
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"CASE WHEN c.relkind = 'f' THEN "
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"(SELECT ftserver FROM pg_catalog.pg_foreign_table WHERE ftrelid = c.oid) "
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"ELSE 0 END AS foreignserver, "
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"CASE WHEN c.reloftype <> 0 THEN c.reloftype::pg_catalog.regtype ELSE NULL END AS reloftype, "
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"c.reloftype, "
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"d.refobjid AS owning_tab, "
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"d.refobjsubid AS owning_col, "
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"(SELECT spcname FROM pg_tablespace t WHERE t.oid = c.reltablespace) AS reltablespace, "
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@ -6439,9 +6435,7 @@ getTables(Archive *fout, int *numTables)
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"OR %s IS NOT NULL"
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"))"
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"AS changed_acl, "
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"%s AS partkeydef, "
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"%s AS ispartition, "
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"%s AS partbound "
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"%s AS ispartition "
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"FROM pg_class c "
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"LEFT JOIN pg_depend d ON "
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"(c.relkind = '%c' AND "
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@ -6467,9 +6461,7 @@ getTables(Archive *fout, int *numTables)
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attracl_subquery->data,
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attinitacl_subquery->data,
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attinitracl_subquery->data,
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partkeydef,
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ispartition,
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partbound,
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RELKIND_SEQUENCE,
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RELKIND_PARTITIONED_TABLE,
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RELKIND_RELATION, RELKIND_SEQUENCE,
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@ -6512,7 +6504,7 @@ getTables(Archive *fout, int *numTables)
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"CASE WHEN c.relkind = 'f' THEN "
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"(SELECT ftserver FROM pg_catalog.pg_foreign_table WHERE ftrelid = c.oid) "
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"ELSE 0 END AS foreignserver, "
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"CASE WHEN c.reloftype <> 0 THEN c.reloftype::pg_catalog.regtype ELSE NULL END AS reloftype, "
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"c.reloftype, "
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"d.refobjid AS owning_tab, "
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"d.refobjsubid AS owning_col, "
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"(SELECT spcname FROM pg_tablespace t WHERE t.oid = c.reltablespace) AS reltablespace, "
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@ -6521,9 +6513,7 @@ getTables(Archive *fout, int *numTables)
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"WHEN 'check_option=cascaded' = ANY (c.reloptions) THEN 'CASCADED'::text ELSE NULL END AS checkoption, "
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"tc.reloptions AS toast_reloptions, "
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"NULL AS changed_acl, "
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"NULL AS partkeydef, "
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"false AS ispartition, "
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"NULL AS partbound "
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"false AS ispartition "
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"FROM pg_class c "
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"LEFT JOIN pg_depend d ON "
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"(c.relkind = '%c' AND "
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@ -6565,7 +6555,7 @@ getTables(Archive *fout, int *numTables)
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"CASE WHEN c.relkind = 'f' THEN "
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"(SELECT ftserver FROM pg_catalog.pg_foreign_table WHERE ftrelid = c.oid) "
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"ELSE 0 END AS foreignserver, "
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"CASE WHEN c.reloftype <> 0 THEN c.reloftype::pg_catalog.regtype ELSE NULL END AS reloftype, "
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"c.reloftype, "
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"d.refobjid AS owning_tab, "
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"d.refobjsubid AS owning_col, "
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"(SELECT spcname FROM pg_tablespace t WHERE t.oid = c.reltablespace) AS reltablespace, "
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@ -6574,9 +6564,7 @@ getTables(Archive *fout, int *numTables)
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"WHEN 'check_option=cascaded' = ANY (c.reloptions) THEN 'CASCADED'::text ELSE NULL END AS checkoption, "
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"tc.reloptions AS toast_reloptions, "
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"NULL AS changed_acl, "
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"NULL AS partkeydef, "
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"false AS ispartition, "
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"NULL AS partbound "
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"false AS ispartition "
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"FROM pg_class c "
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"LEFT JOIN pg_depend d ON "
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"(c.relkind = '%c' AND "
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@ -6618,7 +6606,7 @@ getTables(Archive *fout, int *numTables)
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"CASE WHEN c.relkind = 'f' THEN "
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"(SELECT ftserver FROM pg_catalog.pg_foreign_table WHERE ftrelid = c.oid) "
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"ELSE 0 END AS foreignserver, "
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"CASE WHEN c.reloftype <> 0 THEN c.reloftype::pg_catalog.regtype ELSE NULL END AS reloftype, "
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"c.reloftype, "
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"d.refobjid AS owning_tab, "
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"d.refobjsubid AS owning_col, "
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"(SELECT spcname FROM pg_tablespace t WHERE t.oid = c.reltablespace) AS reltablespace, "
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@ -6627,9 +6615,7 @@ getTables(Archive *fout, int *numTables)
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"WHEN 'check_option=cascaded' = ANY (c.reloptions) THEN 'CASCADED'::text ELSE NULL END AS checkoption, "
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"tc.reloptions AS toast_reloptions, "
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"NULL AS changed_acl, "
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"NULL AS partkeydef, "
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"false AS ispartition, "
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"NULL AS partbound "
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"false AS ispartition "
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"FROM pg_class c "
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"LEFT JOIN pg_depend d ON "
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"(c.relkind = '%c' AND "
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@ -6671,16 +6657,14 @@ getTables(Archive *fout, int *numTables)
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"CASE WHEN c.relkind = 'f' THEN "
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"(SELECT ftserver FROM pg_catalog.pg_foreign_table WHERE ftrelid = c.oid) "
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"ELSE 0 END AS foreignserver, "
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"CASE WHEN c.reloftype <> 0 THEN c.reloftype::pg_catalog.regtype ELSE NULL END AS reloftype, "
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"c.reloftype, "
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"d.refobjid AS owning_tab, "
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"d.refobjsubid AS owning_col, "
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"(SELECT spcname FROM pg_tablespace t WHERE t.oid = c.reltablespace) AS reltablespace, "
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"c.reloptions AS reloptions, "
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"tc.reloptions AS toast_reloptions, "
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"NULL AS changed_acl, "
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"NULL AS partkeydef, "
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"false AS ispartition, "
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"NULL AS partbound "
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"false AS ispartition "
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"FROM pg_class c "
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"LEFT JOIN pg_depend d ON "
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"(c.relkind = '%c' AND "
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@ -6720,16 +6704,14 @@ getTables(Archive *fout, int *numTables)
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"'d' AS relreplident, c.relpages, "
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"NULL AS amname, "
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"NULL AS foreignserver, "
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"CASE WHEN c.reloftype <> 0 THEN c.reloftype::pg_catalog.regtype ELSE NULL END AS reloftype, "
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"c.reloftype, "
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"d.refobjid AS owning_tab, "
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"d.refobjsubid AS owning_col, "
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"(SELECT spcname FROM pg_tablespace t WHERE t.oid = c.reltablespace) AS reltablespace, "
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"c.reloptions AS reloptions, "
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"tc.reloptions AS toast_reloptions, "
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"NULL AS changed_acl, "
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"NULL AS partkeydef, "
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"false AS ispartition, "
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"NULL AS partbound "
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"false AS ispartition "
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"FROM pg_class c "
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"LEFT JOIN pg_depend d ON "
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"(c.relkind = '%c' AND "
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@ -6768,16 +6750,14 @@ getTables(Archive *fout, int *numTables)
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"'d' AS relreplident, c.relpages, "
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"NULL AS amname, "
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"NULL AS foreignserver, "
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"NULL AS reloftype, "
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"0 AS reloftype, "
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"d.refobjid AS owning_tab, "
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"d.refobjsubid AS owning_col, "
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"(SELECT spcname FROM pg_tablespace t WHERE t.oid = c.reltablespace) AS reltablespace, "
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"c.reloptions AS reloptions, "
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"tc.reloptions AS toast_reloptions, "
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"NULL AS changed_acl, "
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"NULL AS partkeydef, "
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"false AS ispartition, "
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"NULL AS partbound "
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"false AS ispartition "
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"FROM pg_class c "
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"LEFT JOIN pg_depend d ON "
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"(c.relkind = '%c' AND "
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@ -6816,16 +6796,14 @@ getTables(Archive *fout, int *numTables)
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"'d' AS relreplident, c.relpages, "
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"NULL AS amname, "
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"NULL AS foreignserver, "
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"NULL AS reloftype, "
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"0 AS reloftype, "
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"d.refobjid AS owning_tab, "
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"d.refobjsubid AS owning_col, "
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"(SELECT spcname FROM pg_tablespace t WHERE t.oid = c.reltablespace) AS reltablespace, "
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"c.reloptions AS reloptions, "
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"NULL AS toast_reloptions, "
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"NULL AS changed_acl, "
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"NULL AS partkeydef, "
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"false AS ispartition, "
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"NULL AS partbound "
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"false AS ispartition "
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"FROM pg_class c "
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"LEFT JOIN pg_depend d ON "
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"(c.relkind = '%c' AND "
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@ -6863,16 +6841,14 @@ getTables(Archive *fout, int *numTables)
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"'d' AS relreplident, relpages, "
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"NULL AS amname, "
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"NULL AS foreignserver, "
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"NULL AS reloftype, "
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"0 AS reloftype, "
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"d.refobjid AS owning_tab, "
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"d.refobjsubid AS owning_col, "
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"(SELECT spcname FROM pg_tablespace t WHERE t.oid = c.reltablespace) AS reltablespace, "
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"NULL AS reloptions, "
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"NULL AS toast_reloptions, "
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"NULL AS changed_acl, "
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"NULL AS partkeydef, "
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"false AS ispartition, "
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"NULL AS partbound "
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"false AS ispartition "
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"FROM pg_class c "
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"LEFT JOIN pg_depend d ON "
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"(c.relkind = '%c' AND "
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@ -6940,9 +6916,7 @@ getTables(Archive *fout, int *numTables)
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i_reloftype = PQfnumber(res, "reloftype");
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i_is_identity_sequence = PQfnumber(res, "is_identity_sequence");
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i_changed_acl = PQfnumber(res, "changed_acl");
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i_partkeydef = PQfnumber(res, "partkeydef");
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i_ispartition = PQfnumber(res, "ispartition");
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i_partbound = PQfnumber(res, "partbound");
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i_amname = PQfnumber(res, "amname");
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if (dopt->lockWaitTimeout)
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@ -6990,10 +6964,7 @@ getTables(Archive *fout, int *numTables)
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tblinfo[i].toast_oid = atooid(PQgetvalue(res, i, i_toastoid));
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tblinfo[i].toast_frozenxid = atooid(PQgetvalue(res, i, i_toastfrozenxid));
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tblinfo[i].toast_minmxid = atooid(PQgetvalue(res, i, i_toastminmxid));
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if (PQgetisnull(res, i, i_reloftype))
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tblinfo[i].reloftype = NULL;
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else
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tblinfo[i].reloftype = pg_strdup(PQgetvalue(res, i, i_reloftype));
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tblinfo[i].reloftype = atooid(PQgetvalue(res, i, i_reloftype));
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tblinfo[i].ncheck = atoi(PQgetvalue(res, i, i_relchecks));
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if (PQgetisnull(res, i, i_owning_tab))
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{
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@ -7049,10 +7020,8 @@ getTables(Archive *fout, int *numTables)
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tblinfo[i].is_identity_sequence = (i_is_identity_sequence >= 0 &&
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strcmp(PQgetvalue(res, i, i_is_identity_sequence), "t") == 0);
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/* Partition key string or NULL */
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tblinfo[i].partkeydef = pg_strdup(PQgetvalue(res, i, i_partkeydef));
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/* Partition? */
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tblinfo[i].ispartition = (strcmp(PQgetvalue(res, i, i_ispartition), "t") == 0);
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tblinfo[i].partbound = pg_strdup(PQgetvalue(res, i, i_partbound));
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/* foreign server */
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tblinfo[i].foreign_server = atooid(PQgetvalue(res, i, i_foreignserver));
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@ -15930,12 +15899,34 @@ dumpTableSchema(Archive *fout, const TableInfo *tbinfo)
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}
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else
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{
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char *partkeydef = NULL;
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char *ftoptions = NULL;
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char *srvname = NULL;
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char *foreign = "";
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/*
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* Set reltypename, and collect any relkind-specific data that we
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* didn't fetch during getTables().
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*/
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switch (tbinfo->relkind)
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{
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case RELKIND_PARTITIONED_TABLE:
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{
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PQExpBuffer query = createPQExpBuffer();
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PGresult *res;
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reltypename = "TABLE";
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/* retrieve partition key definition */
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appendPQExpBuffer(query,
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"SELECT pg_get_partkeydef('%u')",
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tbinfo->dobj.catId.oid);
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res = ExecuteSqlQueryForSingleRow(fout, query->data);
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partkeydef = pg_strdup(PQgetvalue(res, 0, 0));
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PQclear(res);
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destroyPQExpBuffer(query);
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break;
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}
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case RELKIND_FOREIGN_TABLE:
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{
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PQExpBuffer query = createPQExpBuffer();
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@ -15975,6 +15966,7 @@ dumpTableSchema(Archive *fout, const TableInfo *tbinfo)
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break;
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default:
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reltypename = "TABLE";
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break;
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}
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numParents = tbinfo->numParents;
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@ -15996,8 +15988,10 @@ dumpTableSchema(Archive *fout, const TableInfo *tbinfo)
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* Attach to type, if reloftype; except in case of a binary upgrade,
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* we dump the table normally and attach it to the type afterward.
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*/
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if (tbinfo->reloftype && !dopt->binary_upgrade)
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appendPQExpBuffer(q, " OF %s", tbinfo->reloftype);
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if (OidIsValid(tbinfo->reloftype) && !dopt->binary_upgrade)
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appendPQExpBuffer(q, " OF %s",
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getFormattedTypeName(fout, tbinfo->reloftype,
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zeroIsError));
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if (tbinfo->relkind != RELKIND_MATVIEW)
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{
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|
@ -16035,7 +16029,8 @@ dumpTableSchema(Archive *fout, const TableInfo *tbinfo)
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* Skip column if fully defined by reloftype, except in
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* binary upgrade
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*/
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if (tbinfo->reloftype && !print_default && !print_notnull &&
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if (OidIsValid(tbinfo->reloftype) &&
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!print_default && !print_notnull &&
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!dopt->binary_upgrade)
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continue;
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|
@ -16068,7 +16063,7 @@ dumpTableSchema(Archive *fout, const TableInfo *tbinfo)
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* table ('OF type_name'), but in binary-upgrade mode,
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* print it in that case too.
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*/
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if (dopt->binary_upgrade || !tbinfo->reloftype)
|
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if (dopt->binary_upgrade || !OidIsValid(tbinfo->reloftype))
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{
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appendPQExpBuffer(q, " %s",
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tbinfo->atttypnames[j]);
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|
@ -16131,7 +16126,7 @@ dumpTableSchema(Archive *fout, const TableInfo *tbinfo)
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if (actual_atts)
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appendPQExpBufferStr(q, "\n)");
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else if (!(tbinfo->reloftype && !dopt->binary_upgrade))
|
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else if (!(OidIsValid(tbinfo->reloftype) && !dopt->binary_upgrade))
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{
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/*
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* No attributes? we must have a parenthesized attribute list,
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|
@ -16160,7 +16155,7 @@ dumpTableSchema(Archive *fout, const TableInfo *tbinfo)
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}
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if (tbinfo->relkind == RELKIND_PARTITIONED_TABLE)
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appendPQExpBuffer(q, "\nPARTITION BY %s", tbinfo->partkeydef);
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appendPQExpBuffer(q, "\nPARTITION BY %s", partkeydef);
|
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if (tbinfo->relkind == RELKIND_FOREIGN_TABLE)
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appendPQExpBuffer(q, "\nSERVER %s", fmtId(srvname));
|
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|
@ -16343,12 +16338,13 @@ dumpTableSchema(Archive *fout, const TableInfo *tbinfo)
|
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}
|
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}
|
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|
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if (tbinfo->reloftype)
|
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if (OidIsValid(tbinfo->reloftype))
|
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{
|
||||
appendPQExpBufferStr(q, "\n-- For binary upgrade, set up typed tables this way.\n");
|
||||
appendPQExpBuffer(q, "ALTER TABLE ONLY %s OF %s;\n",
|
||||
qualrelname,
|
||||
tbinfo->reloftype);
|
||||
getFormattedTypeName(fout, tbinfo->reloftype,
|
||||
zeroIsError));
|
||||
}
|
||||
}
|
||||
|
||||
|
@ -16521,6 +16517,8 @@ dumpTableSchema(Archive *fout, const TableInfo *tbinfo)
|
|||
tbinfo->attfdwoptions[j]);
|
||||
} /* end loop over columns */
|
||||
|
||||
if (partkeydef)
|
||||
free(partkeydef);
|
||||
if (ftoptions)
|
||||
free(ftoptions);
|
||||
if (srvname)
|
||||
|
@ -16628,6 +16626,8 @@ dumpTableAttach(Archive *fout, const TableAttachInfo *attachinfo)
|
|||
{
|
||||
DumpOptions *dopt = fout->dopt;
|
||||
PQExpBuffer q;
|
||||
PGresult *res;
|
||||
char *partbound;
|
||||
|
||||
if (dopt->dataOnly)
|
||||
return;
|
||||
|
@ -16637,14 +16637,23 @@ dumpTableAttach(Archive *fout, const TableAttachInfo *attachinfo)
|
|||
|
||||
q = createPQExpBuffer();
|
||||
|
||||
/* Perform ALTER TABLE on the parent */
|
||||
/* Fetch the partition's partbound */
|
||||
appendPQExpBuffer(q,
|
||||
"SELECT pg_get_expr(c.relpartbound, c.oid) "
|
||||
"FROM pg_class c "
|
||||
"WHERE c.oid = '%u'",
|
||||
attachinfo->partitionTbl->dobj.catId.oid);
|
||||
res = ExecuteSqlQueryForSingleRow(fout, q->data);
|
||||
partbound = PQgetvalue(res, 0, 0);
|
||||
|
||||
/* Perform ALTER TABLE on the parent */
|
||||
printfPQExpBuffer(q,
|
||||
"ALTER TABLE ONLY %s ",
|
||||
fmtQualifiedDumpable(attachinfo->parentTbl));
|
||||
appendPQExpBuffer(q,
|
||||
"ATTACH PARTITION %s %s;\n",
|
||||
fmtQualifiedDumpable(attachinfo->partitionTbl),
|
||||
attachinfo->partitionTbl->partbound);
|
||||
partbound);
|
||||
|
||||
/*
|
||||
* There is no point in creating a drop query as the drop is done by table
|
||||
|
@ -16661,6 +16670,7 @@ dumpTableAttach(Archive *fout, const TableAttachInfo *attachinfo)
|
|||
.section = SECTION_PRE_DATA,
|
||||
.createStmt = q->data));
|
||||
|
||||
PQclear(res);
|
||||
destroyPQExpBuffer(q);
|
||||
}
|
||||
|
||||
|
|
|
@ -286,7 +286,7 @@ typedef struct _tableInfo
|
|||
uint32 toast_frozenxid; /* toast table's relfrozenxid, if any */
|
||||
uint32 toast_minmxid; /* toast table's relminmxid */
|
||||
int ncheck; /* # of CHECK expressions */
|
||||
char *reloftype; /* underlying type for typed table */
|
||||
Oid reloftype; /* underlying type for typed table */
|
||||
Oid foreign_server; /* foreign server oid, if applicable */
|
||||
/* these two are set only if table is a sequence owned by a column: */
|
||||
Oid owning_tab; /* OID of table owning sequence */
|
||||
|
@ -325,8 +325,6 @@ typedef struct _tableInfo
|
|||
bool *inhNotNull; /* true if NOT NULL is inherited */
|
||||
struct _attrDefInfo **attrdefs; /* DEFAULT expressions */
|
||||
struct _constraintInfo *checkexprs; /* CHECK constraints */
|
||||
char *partkeydef; /* partition key definition */
|
||||
char *partbound; /* partition bound definition */
|
||||
bool needs_override; /* has GENERATED ALWAYS AS IDENTITY */
|
||||
char *amname; /* relation access method */
|
||||
|
||||
|
|
Loading…
Reference in New Issue