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-rw-r--r--doc/src/sgml/release-11.sgml23
-rw-r--r--src/bin/pg_dump/pg_dump.c123
-rw-r--r--src/bin/pg_dump/t/002_pg_dump.pl12
3 files changed, 75 insertions, 83 deletions
diff --git a/doc/src/sgml/release-11.sgml b/doc/src/sgml/release-11.sgml
index 373b8de09ac..e9ce1ee9253 100644
--- a/doc/src/sgml/release-11.sgml
+++ b/doc/src/sgml/release-11.sgml
@@ -1053,29 +1053,6 @@ Branch: REL9_4_STABLE [12c42a543] 2019-04-11 21:06:21 +0200
<listitem>
<!--
-Author: Alvaro Herrera <alvherre@alvh.no-ip.org>
-Branch: master [3b23552ad] 2019-04-24 15:30:37 -0400
-Branch: REL_11_STABLE [a98c48deb] 2019-04-24 15:30:37 -0400
-Branch: REL_10_STABLE [5a191f697] 2019-04-24 15:30:37 -0400
--->
- <para>
- Make <application>pg_dump</application> recreate table partitions
- using <command>ATTACH PARTITION</command> instead
- of <command>CREATE TABLE ... PARTITION OF</command> (David Rowley)
- </para>
-
- <para>
- This avoids various corner-case problems, notably that dump and
- restore might unexpectedly alter a partition's column ordering.
- It also means that a selective restore of the partition can succeed
- even if its parent partitioned table isn't restored.
- (The <command>ATTACH PARTITION</command> will fail of course, but
- the partition table itself can be created and populated.)
- </para>
- </listitem>
-
- <listitem>
-<!--
Author: Michael Paquier <michael@paquier.xyz>
Branch: master [a7eadaaaa] 2019-03-18 10:34:45 +0900
Branch: REL_11_STABLE [dcf2a0db8] 2019-03-18 10:35:01 +0900
diff --git a/src/bin/pg_dump/pg_dump.c b/src/bin/pg_dump/pg_dump.c
index e6a116cefff..c79ac0b18ee 100644
--- a/src/bin/pg_dump/pg_dump.c
+++ b/src/bin/pg_dump/pg_dump.c
@@ -8617,12 +8617,9 @@ getTableAttrs(Archive *fout, TableInfo *tblinfo, int numTables)
* Normally this is always true, but it's false for dropped columns, as well
* as those that were inherited without any local definition. (If we print
* such a column it will mistakenly get pg_attribute.attislocal set to true.)
- * For partitions, it's always true, because we want the partitions to be
- * created independently and ATTACH PARTITION used afterwards.
- *
- * In binary_upgrade mode, we must print all columns and fix the attislocal/
- * attisdropped state later, so as to keep control of the physical column
- * order.
+ * However, in binary_upgrade mode, we must print all such columns anyway and
+ * fix the attislocal/attisdropped state later, so as to keep control of the
+ * physical column order.
*
* This function exists because there are scattered nonobvious places that
* must be kept in sync with this decision.
@@ -8632,9 +8629,7 @@ shouldPrintColumn(DumpOptions *dopt, TableInfo *tbinfo, int colno)
{
if (dopt->binary_upgrade)
return true;
- if (tbinfo->attisdropped[colno])
- return false;
- return (tbinfo->attislocal[colno] || tbinfo->ispartition);
+ return (tbinfo->attislocal[colno] && !tbinfo->attisdropped[colno]);
}
@@ -15543,6 +15538,27 @@ dumpTableSchema(Archive *fout, TableInfo *tbinfo)
if (tbinfo->reloftype && !dopt->binary_upgrade)
appendPQExpBuffer(q, " OF %s", tbinfo->reloftype);
+ /*
+ * If the table is a partition, dump it as such; except in the case of
+ * a binary upgrade, we dump the table normally and attach it to the
+ * parent afterward.
+ */
+ if (tbinfo->ispartition && !dopt->binary_upgrade)
+ {
+ TableInfo *parentRel = tbinfo->parents[0];
+
+ /*
+ * With partitions, unlike inheritance, there can only be one
+ * parent.
+ */
+ if (tbinfo->numParents != 1)
+ exit_horribly(NULL, "invalid number of parents %d for table \"%s\"\n",
+ tbinfo->numParents, tbinfo->dobj.name);
+
+ appendPQExpBuffer(q, " PARTITION OF %s",
+ fmtQualifiedDumpable(parentRel));
+ }
+
if (tbinfo->relkind != RELKIND_MATVIEW)
{
/* Dump the attributes */
@@ -15571,9 +15587,12 @@ dumpTableSchema(Archive *fout, TableInfo *tbinfo)
(!tbinfo->inhNotNull[j] ||
dopt->binary_upgrade));
- /* Skip column if fully defined by reloftype */
- if (tbinfo->reloftype && !has_default && !has_notnull &&
- !dopt->binary_upgrade)
+ /*
+ * Skip column if fully defined by reloftype or the
+ * partition parent.
+ */
+ if ((tbinfo->reloftype || tbinfo->ispartition) &&
+ !has_default && !has_notnull && !dopt->binary_upgrade)
continue;
/* Format properly if not first attr */
@@ -15596,16 +15615,20 @@ dumpTableSchema(Archive *fout, TableInfo *tbinfo)
* clean things up later.
*/
appendPQExpBufferStr(q, " INTEGER /* dummy */");
- /* and skip to the next column */
+ /* Skip all the rest, too */
continue;
}
/*
- * Attribute type; print it except when creating a typed
- * table ('OF type_name'), but in binary-upgrade mode,
- * print it in that case too.
+ * Attribute type
+ *
+ * In binary-upgrade mode, we always include the type. If
+ * we aren't in binary-upgrade mode, then we skip the type
+ * when creating a typed table ('OF type_name') or a
+ * partition ('PARTITION OF'), since the type comes from
+ * the parent/partitioned table.
*/
- if (dopt->binary_upgrade || !tbinfo->reloftype)
+ if (dopt->binary_upgrade || (!tbinfo->reloftype && !tbinfo->ispartition))
{
appendPQExpBuffer(q, " %s",
tbinfo->atttypnames[j]);
@@ -15655,20 +15678,25 @@ dumpTableSchema(Archive *fout, TableInfo *tbinfo)
if (actual_atts)
appendPQExpBufferStr(q, "\n)");
- else if (!(tbinfo->reloftype && !dopt->binary_upgrade))
+ else if (!((tbinfo->reloftype || tbinfo->ispartition) &&
+ !dopt->binary_upgrade))
{
/*
- * No attributes? we must have a parenthesized attribute list,
- * even though empty, when not using the OF TYPE syntax.
+ * We must have a parenthesized attribute list, even though
+ * empty, when not using the OF TYPE or PARTITION OF syntax.
*/
appendPQExpBufferStr(q, " (\n)");
}
- /*
- * Emit the INHERITS clause (not for partitions), except in
- * binary-upgrade mode.
- */
- if (numParents > 0 && !tbinfo->ispartition &&
+ if (tbinfo->ispartition && !dopt->binary_upgrade)
+ {
+ appendPQExpBufferChar(q, '\n');
+ appendPQExpBufferStr(q, tbinfo->partbound);
+ }
+
+ /* Emit the INHERITS clause, except if this is a partition. */
+ if (numParents > 0 &&
+ !tbinfo->ispartition &&
!dopt->binary_upgrade)
{
appendPQExpBufferStr(q, "\nINHERITS (");
@@ -15841,16 +15869,30 @@ dumpTableSchema(Archive *fout, TableInfo *tbinfo)
appendPQExpBufferStr(q, "::pg_catalog.regclass;\n");
}
- if (numParents > 0 && !tbinfo->ispartition)
+ if (numParents > 0)
{
- appendPQExpBufferStr(q, "\n-- For binary upgrade, set up inheritance this way.\n");
+ appendPQExpBufferStr(q, "\n-- For binary upgrade, set up inheritance and partitioning this way.\n");
for (k = 0; k < numParents; k++)
{
TableInfo *parentRel = parents[k];
- appendPQExpBuffer(q, "ALTER TABLE ONLY %s INHERIT %s;\n",
- qualrelname,
- fmtQualifiedDumpable(parentRel));
+ /* In the partitioning case, we alter the parent */
+ if (tbinfo->ispartition)
+ appendPQExpBuffer(q,
+ "ALTER TABLE ONLY %s ATTACH PARTITION ",
+ fmtQualifiedDumpable(parentRel));
+ else
+ appendPQExpBuffer(q, "ALTER TABLE ONLY %s INHERIT ",
+ qualrelname);
+
+ /* Partition needs specifying the bounds */
+ if (tbinfo->ispartition)
+ appendPQExpBuffer(q, "%s %s;\n",
+ qualrelname,
+ tbinfo->partbound);
+ else
+ appendPQExpBuffer(q, "%s;\n",
+ fmtQualifiedDumpable(parentRel));
}
}
@@ -15864,27 +15906,6 @@ dumpTableSchema(Archive *fout, TableInfo *tbinfo)
}
/*
- * For partitioned tables, emit the ATTACH PARTITION clause. Note
- * that we always want to create partitions this way instead of using
- * CREATE TABLE .. PARTITION OF, mainly to preserve a possible column
- * layout discrepancy with the parent, but also to ensure it gets the
- * correct tablespace setting if it differs from the parent's.
- */
- if (tbinfo->ispartition)
- {
- /* With partitions there can only be one parent */
- if (tbinfo->numParents != 1)
- exit_horribly(NULL, "invalid number of parents %d for table \"%s\"\n",
- tbinfo->numParents, tbinfo->dobj.name);
-
- /* Perform ALTER TABLE on the parent */
- appendPQExpBuffer(q,
- "ALTER TABLE ONLY %s ATTACH PARTITION %s %s;\n",
- fmtQualifiedDumpable(parents[0]),
- qualrelname, tbinfo->partbound);
- }
-
- /*
* In binary_upgrade mode, arrange to restore the old relfrozenxid and
* relminmxid of all vacuumable relations. (While vacuum.c processes
* TOAST tables semi-independently, here we see them only as children
diff --git a/src/bin/pg_dump/t/002_pg_dump.pl b/src/bin/pg_dump/t/002_pg_dump.pl
index 6cd3a36d4ab..f7cdf046834 100644
--- a/src/bin/pg_dump/t/002_pg_dump.pl
+++ b/src/bin/pg_dump/t/002_pg_dump.pl
@@ -732,12 +732,7 @@ my %tests = (
\QALTER TABLE ONLY dump_test.measurement ATTACH PARTITION dump_test_second_schema.measurement_y2006m2 \E
\QFOR VALUES FROM ('2006-02-01') TO ('2006-03-01');\E\n
/xm,
- like => {
- %full_runs,
- role => 1,
- section_pre_data => 1,
- binary_upgrade => 1,
- },
+ like => { binary_upgrade => 1, },
},
'ALTER TABLE test_table CLUSTER ON test_table_pkey' => {
@@ -2355,13 +2350,12 @@ my %tests = (
\QCREATE TABLE dump_test_second_schema.measurement_y2006m2 PARTITION OF dump_test.measurement\E\n
\QFOR VALUES FROM ('2006-02-01') TO ('2006-03-01');\E\n
/xm,
- like => {},
- unlike => {
+ like => {
%full_runs,
role => 1,
section_pre_data => 1,
- binary_upgrade => 1,
},
+ unlike => { binary_upgrade => 1, },
},
'CREATE TABLE test_fourth_table_zero_col' => {
generated by cgit v1.2.3 (git 2.39.1) at 2025-07-19 08:05:31 +0000