On 06/20/2018 09:04 PM, Andres Freund wrote:

Probably couldn't hurt to run the changed files through
pgindent and fix the damage...



Looks reasonable to me, but I've not tested it.


Thanks

Patch after pgindent attached. This will involve a catversion bump since we're adding a new function.

cheers

andrew


--
Andrew Dunstan                https://www.2ndQuadrant.com
PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services

diff --git a/src/backend/utils/adt/pg_upgrade_support.c b/src/backend/utils/adt/pg_upgrade_support.c
index 0c54b02..7a2f785 100644
--- a/src/backend/utils/adt/pg_upgrade_support.c
+++ b/src/backend/utils/adt/pg_upgrade_support.c
@@ -11,13 +11,20 @@
 
 #include "postgres.h"
 
+#include "access/heapam.h"
+#include "access/htup_details.h"
 #include "catalog/binary_upgrade.h"
+#include "catalog/indexing.h"
 #include "catalog/namespace.h"
 #include "catalog/pg_type.h"
 #include "commands/extension.h"
 #include "miscadmin.h"
 #include "utils/array.h"
 #include "utils/builtins.h"
+#include "utils/fmgroids.h"
+#include "utils/lsyscache.h"
+#include "utils/rel.h"
+#include "utils/syscache.h"
 
 
 #define CHECK_IS_BINARY_UPGRADE									\
@@ -192,3 +199,63 @@ binary_upgrade_set_record_init_privs(PG_FUNCTION_ARGS)
 
 	PG_RETURN_VOID();
 }
+
+Datum
+binary_upgrade_set_missing_value(PG_FUNCTION_ARGS)
+{
+	Oid			table_id = PG_GETARG_OID(0);
+	text	   *attname = PG_GETARG_TEXT_P(1);
+	text	   *value = PG_GETARG_TEXT_P(2);
+	Datum		valuesAtt[Natts_pg_attribute];
+	bool		nullsAtt[Natts_pg_attribute];
+	bool		replacesAtt[Natts_pg_attribute];
+	Datum		missingval;
+	Form_pg_attribute attStruct;
+	Relation	attrrel,
+				tablerel;
+	HeapTuple	atttup,
+				newtup;
+	char	   *cattname = text_to_cstring(attname);
+	char	   *cvalue = text_to_cstring(value);
+
+	CHECK_IS_BINARY_UPGRADE;
+
+	/* lock the table the attribute belongs to */
+	tablerel = heap_open(table_id, AccessExclusiveLock);
+
+	/* Lock the attribute row and get the data */
+	attrrel = heap_open(AttributeRelationId, RowExclusiveLock);
+	atttup = SearchSysCacheAttName(table_id, cattname);
+	if (!HeapTupleIsValid(atttup))
+		elog(ERROR, "cache lookup failed for attribute %s of relation %u",
+			 cattname, table_id);
+	attStruct = (Form_pg_attribute) GETSTRUCT(atttup);
+
+	/* get an array value from the value string */
+	missingval = OidFunctionCall3(
+								  F_ARRAY_IN,
+								  CStringGetDatum(cvalue),
+								  ObjectIdGetDatum(attStruct->atttypid),
+								  Int32GetDatum(attStruct->atttypmod));
+
+	/* update the tuple - set atthasmissing and attmissingval */
+	MemSet(valuesAtt, 0, sizeof(valuesAtt));
+	MemSet(nullsAtt, false, sizeof(nullsAtt));
+	MemSet(replacesAtt, false, sizeof(replacesAtt));
+
+	valuesAtt[Anum_pg_attribute_atthasmissing - 1] = BoolGetDatum(true);
+	replacesAtt[Anum_pg_attribute_atthasmissing - 1] = true;
+	valuesAtt[Anum_pg_attribute_attmissingval - 1] = missingval;
+	replacesAtt[Anum_pg_attribute_attmissingval - 1] = true;
+
+	newtup = heap_modify_tuple(atttup, RelationGetDescr(attrrel),
+							   valuesAtt, nullsAtt, replacesAtt);
+	CatalogTupleUpdate(attrrel, &newtup->t_self, newtup);
+
+	/* clean up */
+	ReleaseSysCache(atttup);
+	heap_close(attrrel, RowExclusiveLock);
+	heap_close(tablerel, AccessExclusiveLock);
+
+	PG_RETURN_VOID();
+}
diff --git a/src/bin/pg_dump/pg_dump.c b/src/bin/pg_dump/pg_dump.c
index ea2f022..e06ed60 100644
--- a/src/bin/pg_dump/pg_dump.c
+++ b/src/bin/pg_dump/pg_dump.c
@@ -8095,6 +8095,7 @@ getTableAttrs(Archive *fout, TableInfo *tblinfo, int numTables)
 	int			i_typstorage;
 	int			i_attnotnull;
 	int			i_atthasdef;
+	int			i_atthasmissing;
 	int			i_attidentity;
 	int			i_attisdropped;
 	int			i_attlen;
@@ -8103,6 +8104,7 @@ getTableAttrs(Archive *fout, TableInfo *tblinfo, int numTables)
 	int			i_attoptions;
 	int			i_attcollation;
 	int			i_attfdwoptions;
+	int			i_attmissingval;
 	PGresult   *res;
 	int			ntups;
 	bool		hasdefaults;
@@ -8132,7 +8134,33 @@ getTableAttrs(Archive *fout, TableInfo *tblinfo, int numTables)
 
 		resetPQExpBuffer(q);
 
-		if (fout->remoteVersion >= 100000)
+		if (fout->remoteVersion >= 110000)
+		{
+			/* atthasmissing and attmissingval are new in 11 */
+			appendPQExpBuffer(q, "SELECT a.attnum, a.attname, a.atttypmod, "
+							  "a.attstattarget, a.attstorage, t.typstorage, "
+							  "a.attnotnull, a.atthasdef, a.attisdropped, "
+							  "a.attlen, a.attalign, a.attislocal, "
+							  "pg_catalog.format_type(t.oid,a.atttypmod) AS atttypname, "
+							  "array_to_string(a.attoptions, ', ') AS attoptions, "
+							  "CASE WHEN a.attcollation <> t.typcollation "
+							  "THEN a.attcollation ELSE 0 END AS attcollation, "
+							  "a.atthasmissing, a.attidentity, "
+							  "pg_catalog.array_to_string(ARRAY("
+							  "SELECT pg_catalog.quote_ident(option_name) || "
+							  "' ' || pg_catalog.quote_literal(option_value) "
+							  "FROM pg_catalog.pg_options_to_table(attfdwoptions) "
+							  "ORDER BY option_name"
+							  "), E',\n    ') AS attfdwoptions ,"
+							  "a.attmissingval "
+							  "FROM pg_catalog.pg_attribute a LEFT JOIN pg_catalog.pg_type t "
+							  "ON a.atttypid = t.oid "
+							  "WHERE a.attrelid = '%u'::pg_catalog.oid "
+							  "AND a.attnum > 0::pg_catalog.int2 "
+							  "ORDER BY a.attnum",
+							  tbinfo->dobj.catId.oid);
+		}
+		else if (fout->remoteVersion >= 100000)
 		{
 			/*
 			 * attidentity is new in version 10.
@@ -8258,6 +8286,7 @@ getTableAttrs(Archive *fout, TableInfo *tblinfo, int numTables)
 		i_typstorage = PQfnumber(res, "typstorage");
 		i_attnotnull = PQfnumber(res, "attnotnull");
 		i_atthasdef = PQfnumber(res, "atthasdef");
+		i_atthasmissing = PQfnumber(res, "atthasmissing");
 		i_attidentity = PQfnumber(res, "attidentity");
 		i_attisdropped = PQfnumber(res, "attisdropped");
 		i_attlen = PQfnumber(res, "attlen");
@@ -8266,6 +8295,7 @@ getTableAttrs(Archive *fout, TableInfo *tblinfo, int numTables)
 		i_attoptions = PQfnumber(res, "attoptions");
 		i_attcollation = PQfnumber(res, "attcollation");
 		i_attfdwoptions = PQfnumber(res, "attfdwoptions");
+		i_attmissingval = PQfnumber(res, "attmissingval");
 
 		tbinfo->numatts = ntups;
 		tbinfo->attnames = (char **) pg_malloc(ntups * sizeof(char *));
@@ -8274,6 +8304,7 @@ getTableAttrs(Archive *fout, TableInfo *tblinfo, int numTables)
 		tbinfo->attstattarget = (int *) pg_malloc(ntups * sizeof(int));
 		tbinfo->attstorage = (char *) pg_malloc(ntups * sizeof(char));
 		tbinfo->typstorage = (char *) pg_malloc(ntups * sizeof(char));
+		tbinfo->atthasmissing = (bool *) pg_malloc(ntups * sizeof(bool));
 		tbinfo->attidentity = (char *) pg_malloc(ntups * sizeof(char));
 		tbinfo->attisdropped = (bool *) pg_malloc(ntups * sizeof(bool));
 		tbinfo->attlen = (int *) pg_malloc(ntups * sizeof(int));
@@ -8282,6 +8313,7 @@ getTableAttrs(Archive *fout, TableInfo *tblinfo, int numTables)
 		tbinfo->attoptions = (char **) pg_malloc(ntups * sizeof(char *));
 		tbinfo->attcollation = (Oid *) pg_malloc(ntups * sizeof(Oid));
 		tbinfo->attfdwoptions = (char **) pg_malloc(ntups * sizeof(char *));
+		tbinfo->attmissingval = (char **) pg_malloc(ntups * sizeof(char *));
 		tbinfo->notnull = (bool *) pg_malloc(ntups * sizeof(bool));
 		tbinfo->inhNotNull = (bool *) pg_malloc(ntups * sizeof(bool));
 		tbinfo->attrdefs = (AttrDefInfo **) pg_malloc(ntups * sizeof(AttrDefInfo *));
@@ -8299,6 +8331,7 @@ getTableAttrs(Archive *fout, TableInfo *tblinfo, int numTables)
 			tbinfo->attstattarget[j] = atoi(PQgetvalue(res, j, i_attstattarget));
 			tbinfo->attstorage[j] = *(PQgetvalue(res, j, i_attstorage));
 			tbinfo->typstorage[j] = *(PQgetvalue(res, j, i_typstorage));
+			tbinfo->atthasmissing[j] = (i_atthasmissing >= 0 ? (PQgetvalue(res, j, i_atthasmissing)[0] == 't') : false);
 			tbinfo->attidentity[j] = (i_attidentity >= 0 ? *(PQgetvalue(res, j, i_attidentity)) : '\0');
 			tbinfo->needs_override = tbinfo->needs_override || (tbinfo->attidentity[j] == ATTRIBUTE_IDENTITY_ALWAYS);
 			tbinfo->attisdropped[j] = (PQgetvalue(res, j, i_attisdropped)[0] == 't');
@@ -8309,6 +8342,7 @@ getTableAttrs(Archive *fout, TableInfo *tblinfo, int numTables)
 			tbinfo->attoptions[j] = pg_strdup(PQgetvalue(res, j, i_attoptions));
 			tbinfo->attcollation[j] = atooid(PQgetvalue(res, j, i_attcollation));
 			tbinfo->attfdwoptions[j] = pg_strdup(PQgetvalue(res, j, i_attfdwoptions));
+			tbinfo->attmissingval[j] = (tbinfo->atthasmissing[j] ? pg_strdup(PQgetvalue(res, j, i_attmissingval)) : NULL);
 			tbinfo->attrdefs[j] = NULL; /* fix below */
 			if (PQgetvalue(res, j, i_atthasdef)[0] == 't')
 				hasdefaults = true;
@@ -14615,18 +14649,23 @@ dumpDefaultACL(Archive *fout, DefaultACLInfo *daclinfo)
 	{
 		case DEFACLOBJ_RELATION:
 			type = "TABLES";
+
 			break;
 		case DEFACLOBJ_SEQUENCE:
 			type = "SEQUENCES";
+
 			break;
 		case DEFACLOBJ_FUNCTION:
 			type = "FUNCTIONS";
+
 			break;
 		case DEFACLOBJ_TYPE:
 			type = "TYPES";
+
 			break;
 		case DEFACLOBJ_NAMESPACE:
 			type = "SCHEMAS";
+
 			break;
 		default:
 			/* shouldn't get here */
@@ -15659,6 +15698,29 @@ dumpTableSchema(Archive *fout, TableInfo *tbinfo)
 			appendPQExpBufferStr(q, ";\n");
 
 		/*
+		 * in binary upgrade mode, update the catalog with any missing values
+		 * that might be present.
+		 */
+		if (dopt->binary_upgrade)
+		{
+			for (j = 0; j < tbinfo->numatts; j++)
+			{
+				if (tbinfo->atthasmissing[j])
+				{
+					appendPQExpBufferStr(q, "\n-- set missing value.\n");
+					appendPQExpBufferStr(q,
+										 "SELECT pg_catalog.binary_upgrade_set_missing_value(");
+					appendStringLiteralAH(q, qualrelname, fout);
+					appendPQExpBufferStr(q, "::pg_catalog.regclass,");
+					appendStringLiteralAH(q, tbinfo->attnames[j], fout);
+					appendPQExpBufferStr(q, ",");
+					appendStringLiteralAH(q, tbinfo->attmissingval[j], fout);
+					appendPQExpBufferStr(q, ");\n\n");
+				}
+			}
+		}
+
+		/*
 		 * To create binary-compatible heap files, we have to ensure the same
 		 * physical column order, including dropped columns, as in the
 		 * original.  Therefore, we create dropped columns above and drop them
diff --git a/src/bin/pg_dump/pg_dump.h b/src/bin/pg_dump/pg_dump.h
index e96c662..c1681b3 100644
--- a/src/bin/pg_dump/pg_dump.h
+++ b/src/bin/pg_dump/pg_dump.h
@@ -309,6 +309,7 @@ typedef struct _tableInfo
 	char	   *attstorage;		/* attribute storage scheme */
 	char	   *typstorage;		/* type storage scheme */
 	bool	   *attisdropped;	/* true if attr is dropped; don't dump it */
+	bool       *atthasmissing;  /* true if the attribute has a missing value */
 	char	   *attidentity;
 	int		   *attlen;			/* attribute length, used by binary_upgrade */
 	char	   *attalign;		/* attribute align, used by binary_upgrade */
@@ -316,6 +317,7 @@ typedef struct _tableInfo
 	char	  **attoptions;		/* per-attribute options */
 	Oid		   *attcollation;	/* per-attribute collation selection */
 	char	  **attfdwoptions;	/* per-attribute fdw options */
+	char      **attmissingval;  /* per attribute missing value */
 	bool	   *notnull;		/* NOT NULL constraints on attributes */
 	bool	   *inhNotNull;		/* true if NOT NULL is inherited */
 	struct _attrDefInfo **attrdefs; /* DEFAULT expressions */
diff --git a/src/include/catalog/pg_proc.dat b/src/include/catalog/pg_proc.dat
index 66c6c22..9834e38 100644
--- a/src/include/catalog/pg_proc.dat
+++ b/src/include/catalog/pg_proc.dat
@@ -10037,6 +10037,10 @@
   proname => 'binary_upgrade_set_record_init_privs', provolatile => 'v',
   proparallel => 'r', prorettype => 'void', proargtypes => 'bool',
   prosrc => 'binary_upgrade_set_record_init_privs' },
+{ oid => '4101', descr => 'for use by pg_upgrade',
+  proname => 'binary_upgrade_set_missing_value', provolatile => 'v',
+  proparallel => 'r', prorettype => 'void', proargtypes => 'oid text text',
+  prosrc => 'binary_upgrade_set_missing_value' },
 
 # replication/origin.h
 { oid => '6003', descr => 'create a replication origin',

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