Disable dump pax tables in pg_dump (apache#412)

Pax is not working properly in pg_dump/pg_restore.

There are several problems:
The pax relative table in namespace pg_ext_aux won't be dump.
The table access method pax have not been setting in pg_dump.
Current change ignore pax table in pg_dump.

src/bin/pg_dump/pg_dump.c

@@ -173,6 +173,13 @@ static int	extra_float_digits;
  */
 #define DUMP_DEFAULT_ROWS_PER_INSERT 1
 
+/*
+ * FIXME: CBDB should not know the am oid of PAX. We put here because the kernel
+ * can't distinguish the PAX and renamed heap(heap_psql) in test `psql`.
+ * The definition of temporary is here and should be consistent with util/rel.h
+ */
+#define PAX_AM_OID 7047
+
 /*
  * Macro for producing quoted, schema-qualified name of a dumpable object.
  */
@@ -2102,6 +2109,16 @@ selectDumpableTable(TableInfo *tbinfo, Archive *fout)
 		simple_oid_list_member(&table_exclude_oids,
 							   tbinfo->dobj.catId.oid))
 		tbinfo->dobj.dump = DUMP_COMPONENT_NONE;
+
+	/*
+	 * Pax not support pg_dump yet
+	 */
+	if (tbinfo->amoid == PAX_AM_OID) {
+		tbinfo->dobj.dump = DUMP_COMPONENT_NONE;
+
+		pg_log_warning("unsupport am pax yet, current relation \"%s\" will be ignore",
+					   tbinfo->dobj.name);
+	}
 }
 
 /*
@@ -7391,6 +7408,7 @@ getTables(Archive *fout, int *numTables)
 	int			i_ispartition;
 	int			i_partbound;
 	int			i_amname;
+	int			i_amoid;
 	int			i_isivm;
 
 	/*
@@ -7483,6 +7501,7 @@ getTables(Archive *fout, int *numTables)
 						  "tc.relminmxid AS tminmxid, "
 						  "c.relpersistence, c.relispopulated, "
 						  "c.relreplident, c.relpages, am.amname, "
+						  "am.oid AS amoid, "
 						  "CASE WHEN c.relkind = 'f' THEN "
 						  "(SELECT ftserver FROM pg_catalog.pg_foreign_table WHERE ftrelid = c.oid) "
 						  "ELSE 0 END AS foreignserver, "
@@ -8080,6 +8099,7 @@ getTables(Archive *fout, int *numTables)
 	i_ispartition = PQfnumber(res, "ispartition");
 	i_partbound = PQfnumber(res, "partbound");
 	i_amname = PQfnumber(res, "amname");
+	i_amoid = PQfnumber(res, "amoid");
 	i_isivm = PQfnumber(res, "isivm");
 
 	if (dopt->lockWaitTimeout)
@@ -8171,6 +8191,11 @@ getTables(Archive *fout, int *numTables)
 		else
 			tblinfo[i].amname = pg_strdup(PQgetvalue(res, i, i_amname));
 
+		if (PQgetisnull(res, i, i_amoid))
+			tblinfo[i].amoid = InvalidOid;
+		else
+			tblinfo[i].amoid = atooid(PQgetvalue(res, i, i_amoid));
+
 		/* other fields were zeroed above */
 
 		/*

src/bin/pg_dump/pg_dump.h

@@ -383,6 +383,7 @@ typedef struct _tableInfo
 	char	   *partbound;		/* partition bound definition */
 	bool		needs_override; /* has GENERATED ALWAYS AS IDENTITY */
 	char	   *amname;			/* relation access method */
+	Oid			amoid;			/* relation access method oid */
 
 	/*
 	 * Stuff computed only for dumpable tables.