-<!-- $PostgreSQL: pgsql/doc/src/sgml/catalogs.sgml,v 2.227 2010/08/25 18:18:41 petere Exp $ -->
+<!-- $PostgreSQL: pgsql/doc/src/sgml/catalogs.sgml,v 2.228 2010/09/03 01:34:54 tgl Exp $ -->
<!--
Documentation of the system catalogs, directed toward PostgreSQL developers
-->
<row>
<entry><structfield>adbin</structfield></entry>
- <entry><type>text</type></entry>
+ <entry><type>pg_node_tree</type></entry>
<entry></entry>
<entry>The internal representation of the column default value</entry>
</row>
<row>
<entry><structfield>conbin</structfield></entry>
- <entry><type>text</type></entry>
+ <entry><type>pg_node_tree</type></entry>
<entry></entry>
<entry>If a check constraint, an internal representation of the expression</entry>
</row>
<row>
<entry><structfield>indexprs</structfield></entry>
- <entry><type>text</type></entry>
+ <entry><type>pg_node_tree</type></entry>
<entry></entry>
<entry>
Expression trees (in <function>nodeToString()</function>
<row>
<entry><structfield>indpred</structfield></entry>
- <entry><type>text</type></entry>
+ <entry><type>pg_node_tree</type></entry>
<entry></entry>
<entry>
Expression tree (in <function>nodeToString()</function>
<row>
<entry><structfield>proargdefaults</structfield></entry>
- <entry><type>text</type></entry>
+ <entry><type>pg_node_tree</type></entry>
<entry></entry>
<entry>
Expression trees (in <function>nodeToString()</function> representation)
<row>
<entry><structfield>ev_qual</structfield></entry>
- <entry><type>text</type></entry>
+ <entry><type>pg_node_tree</type></entry>
<entry></entry>
<entry>
Expression tree (in the form of a
<row>
<entry><structfield>ev_action</structfield></entry>
- <entry><type>text</type></entry>
+ <entry><type>pg_node_tree</type></entry>
<entry></entry>
<entry>
Query tree (in the form of a
<row>
<entry><structfield>tgqual</structfield></entry>
- <entry><type>text</type></entry>
+ <entry><type>pg_node_tree</type></entry>
<entry></entry>
<entry>Expression tree (in <function>nodeToString()</function>
representation) for the trigger's <literal>WHEN</> condition, or null
<row>
<entry><structfield>typdefaultbin</structfield></entry>
- <entry><type>text</type></entry>
+ <entry><type>pg_node_tree</type></entry>
<entry></entry>
<entry><para>
- If <structfield>typdefaultbin</> is not null, it is the <function>nodeToString()</function>
+ If <structfield>typdefaultbin</> is not null, it is the
+ <function>nodeToString()</function>
representation of a default expression for the type. This is
only used for domains.
</para></entry>
default expression represented by <structfield>typdefaultbin</>. If
<structfield>typdefaultbin</> is null and <structfield>typdefault</> is
not, then <structfield>typdefault</> is the external representation of
- the type's default value, which might be fed to the type's input
+ the type's default value, which can be fed to the type's input
converter to produce a constant.
</para></entry>
</row>
-<!-- $PostgreSQL: pgsql/doc/src/sgml/func.sgml,v 1.531 2010/09/01 18:22:29 tgl Exp $ -->
+<!-- $PostgreSQL: pgsql/doc/src/sgml/func.sgml,v 1.532 2010/09/03 01:34:54 tgl Exp $ -->
<chapter id="functions">
<title>Functions and Operators</title>
<entry>get definition of a constraint</entry>
</row>
<row>
- <entry><literal><function>pg_get_expr</function>(<parameter>
expr_text</parameter>, <parameter>relation_oid</>)</literal></entry>
+ <entry><literal><function>pg_get_expr</function>(<parameter>
pg_node_tree</parameter>, <parameter>relation_oid</>)</literal></entry>
<entry><type>text</type></entry>
<entry>decompile internal form of an expression, assuming that any Vars
in it refer to the relation indicated by the second parameter</entry>
</row>
<row>
- <entry><literal><function>pg_get_expr</function>(<parameter>
expr_text</parameter>, <parameter>relation_oid</>, <parameter>pretty_bool</>)</literal></entry>
+ <entry><literal><function>pg_get_expr</function>(<parameter>
pg_node_tree</parameter>, <parameter>relation_oid</>, <parameter>pretty_bool</>)</literal></entry>
<entry><type>text</type></entry>
<entry>decompile internal form of an expression, assuming that any Vars
in it refer to the relation indicated by the second parameter</entry>
* Portions Copyright (c) 1994, Regents of the University of California
*
* IDENTIFICATION
- * $PostgreSQL: pgsql/src/backend/bootstrap/bootstrap.c,v 1.261 2010/04/20 01:38:52 tgl Exp $
+ * $PostgreSQL: pgsql/src/backend/bootstrap/bootstrap.c,v 1.262 2010/09/03 01:34:55 tgl Exp $
*
*-------------------------------------------------------------------------
*/
/*
* Basic information associated with each type. This is used before
- * pg_type is created.
+ * pg_type is filled, so it has to cover the datatypes used as column types
+ * in the core "bootstrapped" catalogs.
*
* XXX several of these input/output functions do catalog scans
* (e.g., F_REGPROCIN scans pg_proc). this obviously creates some
F_XIDIN, F_XIDOUT},
{"cid", CIDOID, 0, 4, true, 'i', 'p',
F_CIDIN, F_CIDOUT},
+ {"pg_node_tree", PGNODETREEOID, 0, -1, false, 'i', 'x',
+ F_PG_NODE_TREE_IN, F_PG_NODE_TREE_OUT},
{"int2vector", INT2VECTOROID, INT2OID, -1, false, 'i', 'p',
F_INT2VECTORIN, F_INT2VECTOROUT},
{"oidvector", OIDVECTOROID, OIDOID, -1, false, 'i', 'p',
*
*
* IDENTIFICATION
- * $PostgreSQL: pgsql/src/backend/utils/adt/pseudotypes.c,v 1.23 2010/01/02 16:57:55 momjian Exp $
+ * $PostgreSQL: pgsql/src/backend/utils/adt/pseudotypes.c,v 1.24 2010/09/03 01:34:55 tgl Exp $
*
*-------------------------------------------------------------------------
*/
PG_RETURN_VOID(); /* keep compiler quiet */
}
+
+
+/*
+ * pg_node_tree_in - input routine for type PG_NODE_TREE.
+ *
+ * pg_node_tree isn't really a pseudotype --- it's real enough to be a table
+ * column --- but it presently has no operations of its own, and disallows
+ * input too, so its I/O functions seem to fit here as much as anywhere.
+ */
+Datum
+pg_node_tree_in(PG_FUNCTION_ARGS)
+{
+ /*
+ * We disallow input of pg_node_tree values because the SQL functions that
+ * operate on the type are not secure against malformed input.
+ */
+ ereport(ERROR,
+ (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
+ errmsg("cannot accept a value of type pg_node_tree")));
+
+ PG_RETURN_VOID(); /* keep compiler quiet */
+}
+
+/*
+ * pg_node_tree_out - output routine for type PG_NODE_TREE.
+ *
+ * The internal representation is the same as TEXT, so just pass it off.
+ */
+Datum
+pg_node_tree_out(PG_FUNCTION_ARGS)
+{
+ return textout(fcinfo);
+}
+
+/*
+ * pg_node_tree_recv - binary input routine for type PG_NODE_TREE.
+ */
+Datum
+pg_node_tree_recv(PG_FUNCTION_ARGS)
+{
+ ereport(ERROR,
+ (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
+ errmsg("cannot accept a value of type pg_node_tree")));
+
+ PG_RETURN_VOID(); /* keep compiler quiet */
+}
+
+/*
+ * pg_node_tree_send - binary output routine for type PG_NODE_TREE.
+ */
+Datum
+pg_node_tree_send(PG_FUNCTION_ARGS)
+{
+ return textsend(fcinfo);
+}
* Portions Copyright (c) 1996-2010, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
- * $PostgreSQL: pgsql/src/include/catalog/catversion.h,v 1.597 2010/08/24 06:30:43 itagaki Exp $
+ * $PostgreSQL: pgsql/src/include/catalog/catversion.h,v 1.598 2010/09/03 01:34:55 tgl Exp $
*
*-------------------------------------------------------------------------
*/
*/
/* yyyymmddN */
-#define CATALOG_VERSION_NO 201008241
+#define CATALOG_VERSION_NO 201009021
#endif
* Portions Copyright (c) 1996-2010, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
- * $PostgreSQL: pgsql/src/include/catalog/genbki.h,v 1.6 2010/01/05 01:06:56 tgl Exp $
+ * $PostgreSQL: pgsql/src/include/catalog/genbki.h,v 1.7 2010/09/03 01:34:55 tgl Exp $
*
*-------------------------------------------------------------------------
*/
#define DESCR(x) extern int no_such_variable
#define SHDESCR(x) extern int no_such_variable
-/* PHONY type definition for use in catalog structure definitions only */
+/* PHONY type definitions for use in catalog structure definitions only */
typedef int aclitem;
+typedef int pg_node_tree;
#endif /* GENBKI_H */
* Portions Copyright (c) 1996-2010, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
- * $PostgreSQL: pgsql/src/include/catalog/pg_attrdef.h,v 1.26 2010/01/05 01:06:56 tgl Exp $
+ * $PostgreSQL: pgsql/src/include/catalog/pg_attrdef.h,v 1.27 2010/09/03 01:34:55 tgl Exp $
*
* NOTES
* the genbki.pl script reads this file and generates .bki
CATALOG(pg_attrdef,2604)
{
- Oid adrelid;
- int2 adnum;
- text adbin;
- text adsrc;
+ Oid adrelid; /* OID of table containing attribute */
+ int2 adnum; /* attnum of attribute */
+ pg_node_tree adbin; /* nodeToString representation of default */
+ text adsrc; /* human-readable representation of default */
} FormData_pg_attrdef;
/* ----------------
*
* Copyright (c) 2002-2010, PostgreSQL Global Development Group
*
- * $PostgreSQL: pgsql/src/include/catalog/pg_cast.h,v 1.45 2010/07/16 02:15:54 tgl Exp $
+ * $PostgreSQL: pgsql/src/include/catalog/pg_cast.h,v 1.46 2010/09/03 01:34:55 tgl Exp $
*
* NOTES
* the genbki.pl script reads this file and generates .bki
DATA(insert ( 18 23 77 e f ));
DATA(insert ( 23 18 78 e f ));
+/* pg_node_tree can be coerced to, but not from, text */
+DATA(insert ( 194 25 0 i b ));
+
/*
* Datetime category
*/
* Portions Copyright (c) 1996-2010, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
- * $PostgreSQL: pgsql/src/include/catalog/pg_constraint.h,v 1.41 2010/08/07 02:44:07 tgl Exp $
+ * $PostgreSQL: pgsql/src/include/catalog/pg_constraint.h,v 1.42 2010/09/03 01:34:55 tgl Exp $
*
* NOTES
* the genbki.pl script reads this file and generates .bki
/*
* If a check constraint, nodeToString representation of expression
*/
- text conbin;
+ pg_node_tree conbin;
/*
* If a check constraint, source-text representation of expression
* Portions Copyright (c) 1996-2010, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
- * $PostgreSQL: pgsql/src/include/catalog/pg_index.h,v 1.50 2010/01/05 01:06:56 tgl Exp $
+ * $PostgreSQL: pgsql/src/include/catalog/pg_index.h,v 1.51 2010/09/03 01:34:55 tgl Exp $
*
* NOTES
* the genbki.pl script reads this file and generates .bki
int2vector indkey; /* column numbers of indexed cols, or 0 */
oidvector indclass; /* opclass identifiers */
int2vector indoption; /* per-column flags (AM-specific meanings) */
- text indexprs; /* expression trees for index attributes that
+ pg_node_tree indexprs; /* expression trees for index attributes that
* are not simple column references; one for
* each zero entry in indkey[] */
- text indpred; /* expression tree for predicate, if a partial
+ pg_node_tree indpred; /* expression tree for predicate, if a partial
* index; else NULL */
} FormData_pg_index;
* Portions Copyright (c) 1996-2010, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
- * $PostgreSQL: pgsql/src/include/catalog/pg_proc.h,v 1.581 2010/08/24 06:30:43 itagaki Exp $
+ * $PostgreSQL: pgsql/src/include/catalog/pg_proc.h,v 1.582 2010/09/03 01:34:55 tgl Exp $
*
* NOTES
* The script catalog/genbki.pl reads this file and generates .bki
Oid proallargtypes[1]; /* all param types (NULL if IN only) */
char proargmodes[1]; /* parameter modes (NULL if IN only) */
text proargnames[1]; /* parameter names (NULL if no names) */
- text proargdefaults; /* list of expression trees for argument
- * defaults (NULL if none) */
+ pg_node_tree proargdefaults; /* list of expression trees for argument
+ * defaults (NULL if none) */
text prosrc; /* procedure source text */
text probin; /* secondary procedure info (can be NULL) */
text proconfig[1]; /* procedure-local GUC settings */
DATA(insert OID = 193 ( box_contain_pt PGNSP PGUID 12 1 0 0 f f f t f i 2 0 16 "603 600" _null_ _null_ _null_ _null_ box_contain_pt _null_ _null_ _null_ ));
DESCR("contains?");
+DATA(insert OID = 195 ( pg_node_tree_in PGNSP PGUID 12 1 0 0 f f f t f i 1 0 194 "2275" _null_ _null_ _null_ _null_ pg_node_tree_in _null_ _null_ _null_ ));
+DESCR("I/O");
+DATA(insert OID = 196 ( pg_node_tree_out PGNSP PGUID 12 1 0 0 f f f t f i 1 0 2275 "194" _null_ _null_ _null_ _null_ pg_node_tree_out _null_ _null_ _null_ ));
+DESCR("I/O");
+DATA(insert OID = 197 ( pg_node_tree_recv PGNSP PGUID 12 1 0 0 f f f t f s 1 0 194 "2281" _null_ _null_ _null_ _null_ pg_node_tree_recv _null_ _null_ _null_ ));
+DESCR("I/O");
+DATA(insert OID = 198 ( pg_node_tree_send PGNSP PGUID 12 1 0 0 f f f t f s 1 0 17 "194" _null_ _null_ _null_ _null_ pg_node_tree_send _null_ _null_ _null_ ));
+DESCR("I/O");
+
/* OIDS 200 - 299 */
DATA(insert OID = 200 ( float4in PGNSP PGUID 12 1 0 0 f f f t f i 1 0 700 "2275" _null_ _null_ _null_ _null_ float4in _null_ _null_ _null_ ));
DESCR("trigger description");
DATA(insert OID = 1387 ( pg_get_constraintdef PGNSP PGUID 12 1 0 0 f f f t f s 1 0 25 "26" _null_ _null_ _null_ _null_ pg_get_constraintdef _null_ _null_ _null_ ));
DESCR("constraint description");
-DATA(insert OID = 1716 ( pg_get_expr PGNSP PGUID 12 1 0 0 f f f t f s 2 0 25 "25 26" _null_ _null_ _null_ _null_ pg_get_expr _null_ _null_ _null_ ));
+DATA(insert OID = 1716 ( pg_get_expr PGNSP PGUID 12 1 0 0 f f f t f s 2 0 25 "194 26" _null_ _null_ _null_ _null_ pg_get_expr _null_ _null_ _null_ ));
DESCR("deparse an encoded expression");
DATA(insert OID = 1665 ( pg_get_serial_sequence PGNSP PGUID 12 1 0 0 f f f t f s 2 0 25 "25 25" _null_ _null_ _null_ _null_ pg_get_serial_sequence _null_ _null_ _null_ ));
DESCR("name of sequence for a serial column");
DESCR("index description (full create statement or single expression) with pretty-print option");
DATA(insert OID = 2508 ( pg_get_constraintdef PGNSP PGUID 12 1 0 0 f f f t f s 2 0 25 "26 16" _null_ _null_ _null_ _null_ pg_get_constraintdef_ext _null_ _null_ _null_ ));
DESCR("constraint description with pretty-print option");
-DATA(insert OID = 2509 ( pg_get_expr PGNSP PGUID 12 1 0 0 f f f t f s 3 0 25 "25 26 16" _null_ _null_ _null_ _null_ pg_get_expr_ext _null_ _null_ _null_ ));
+DATA(insert OID = 2509 ( pg_get_expr PGNSP PGUID 12 1 0 0 f f f t f s 3 0 25 "194 26 16" _null_ _null_ _null_ _null_ pg_get_expr_ext _null_ _null_ _null_ ));
DESCR("deparse an encoded expression with pretty-print option");
DATA(insert OID = 2510 ( pg_prepared_statement PGNSP PGUID 12 1 1000 0 f f f t t s 0 0 2249 "" "{25,25,1184,2211,16}" "{o,o,o,o,o}" "{name,statement,prepare_time,parameter_types,from_sql}" _null_ pg_prepared_statement _null_ _null_ _null_ ));
DESCR("get the prepared statements for this session");
* Portions Copyright (c) 1996-2010, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
- * $PostgreSQL: pgsql/src/include/catalog/pg_rewrite.h,v 1.35 2010/01/05 01:06:57 tgl Exp $
+ * $PostgreSQL: pgsql/src/include/catalog/pg_rewrite.h,v 1.36 2010/09/03 01:34:55 tgl Exp $
*
* NOTES
* the genbki.pl script reads this file and generates .bki
bool is_instead;
/* NB: remaining fields must be accessed via heap_getattr */
- text ev_qual;
- text ev_action;
+ pg_node_tree ev_qual;
+ pg_node_tree ev_action;
} FormData_pg_rewrite;
/* ----------------
* Portions Copyright (c) 1996-2010, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
- * $PostgreSQL: pgsql/src/include/catalog/pg_trigger.h,v 1.39 2010/01/17 22:56:23 tgl Exp $
+ * $PostgreSQL: pgsql/src/include/catalog/pg_trigger.h,v 1.40 2010/09/03 01:34:55 tgl Exp $
*
* NOTES
* the genbki.pl script reads this file and generates .bki
/* VARIABLE LENGTH FIELDS (note: tgattr and tgargs must not be null) */
int2vector tgattr; /* column numbers, if trigger is on columns */
bytea tgargs; /* first\000second\000tgnargs\000 */
- text tgqual; /* WHEN expression, or NULL if none */
+ pg_node_tree tgqual; /* WHEN expression, or NULL if none */
} FormData_pg_trigger;
/* ----------------
* Portions Copyright (c) 1996-2010, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
- * $PostgreSQL: pgsql/src/include/catalog/pg_type.h,v 1.212 2010/01/05 01:06:57 tgl Exp $
+ * $PostgreSQL: pgsql/src/include/catalog/pg_type.h,v 1.213 2010/09/03 01:34:55 tgl Exp $
*
* NOTES
* the genbki.pl script reads this file and generates .bki
* a default expression for the type. Currently this is only used for
* domains.
*/
- text typdefaultbin; /* VARIABLE LENGTH FIELD */
+ pg_node_tree typdefaultbin; /* VARIABLE LENGTH FIELD */
/*
* typdefault is NULL if the type has no associated default value. If
#define XMLOID 142
DATA(insert OID = 143 ( _xml PGNSP PGUID -1 f b A f t \054 0 142 0 array_in array_out array_recv array_send - - - i x f 0 -1 0 _null_ _null_ ));
+DATA(insert OID = 194 ( pg_node_tree PGNSP PGUID -1 f b S f t \054 0 0 0 pg_node_tree_in pg_node_tree_out pg_node_tree_recv pg_node_tree_send - - - i x f 0 -1 0 _null_ _null_ ));
+DESCR("string representing an internal node tree");
+#define PGNODETREEOID 194
+
/* OIDS 200 - 299 */
DATA(insert OID = 210 ( smgr PGNSP PGUID 2 t b U f t \054 0 0 0 smgrin smgrout - - - - - s p f 0 -1 0 _null_ _null_ ));
* Portions Copyright (c) 1996-2010, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
- * $PostgreSQL: pgsql/src/include/utils/builtins.h,v 1.355 2010/08/24 06:30:44 itagaki Exp $
+ * $PostgreSQL: pgsql/src/include/utils/builtins.h,v 1.356 2010/09/03 01:34:55 tgl Exp $
*
*-------------------------------------------------------------------------
*/
extern Datum anyelement_out(PG_FUNCTION_ARGS);
extern Datum shell_in(PG_FUNCTION_ARGS);
extern Datum shell_out(PG_FUNCTION_ARGS);
+extern Datum pg_node_tree_in(PG_FUNCTION_ARGS);
+extern Datum pg_node_tree_out(PG_FUNCTION_ARGS);
+extern Datum pg_node_tree_recv(PG_FUNCTION_ARGS);
+extern Datum pg_node_tree_send(PG_FUNCTION_ARGS);
/* regexp.c */
extern Datum nameregexeq(PG_FUNCTION_ARGS);
-- As of 8.3, this finds the casts from xml to text, varchar, and bpchar,
-- because those are binary-compatible while the reverse goes through
-- texttoxml(), which does an XML syntax check.
-SELECT *
+-- As of 9.1, this finds the cast from pg_node_tree to text, which we
+-- intentionally do not provide a reverse pathway for.
+SELECT castsource::regtype, casttarget::regtype, castfunc, castcontext
FROM pg_cast c
WHERE c.castmethod = 'b' AND
NOT EXISTS (SELECT 1 FROM pg_cast k
WHERE k.castmethod = 'b' AND
k.castsource = c.casttarget AND
k.casttarget = c.castsource);
- castsource | casttarget | castfunc | castcontext | castmethod
-------------+------------+----------+-------------+------------
- 25 | 1042 | 0 | i | b
- 1043 | 1042 | 0 | i | b
- 650 | 869 | 0 | i | b
- 142 | 25 | 0 | a | b
- 142 | 1043 | 0 | a | b
- 142 | 1042 | 0 | a | b
-(6 rows)
+ castsource | casttarget | castfunc | castcontext
+-------------------+-------------------+----------+-------------
+ text | character | 0 | i
+ character varying | character | 0 | i
+ pg_node_tree | text | 0 | i
+ cidr | inet | 0 | i
+ xml | text | 0 | a
+ xml | character varying | 0 | a
+ xml | character | 0 | a
+(7 rows)
-- **************** pg_operator ****************
-- Look for illegal values in pg_operator fields.
(0 rows)
-- Look for basic or enum types that don't have an array type.
--- NOTE: as of 8.0, this check finds smgr and unknown.
+-- NOTE: as of 9.1, this check finds pg_node_tree, smgr, and unknown.
SELECT p1.oid, p1.typname
FROM pg_type as p1
WHERE p1.typtype in ('b','e') AND p1.typname NOT LIKE E'\\_%' AND NOT EXISTS
(SELECT 1 FROM pg_type as p2
WHERE p2.typname = ('_' || p1.typname)::name AND
p2.typelem = p1.oid and p1.typarray = p2.oid);
- oid | typname
------+---------
+ oid | typname
+-----+--------------
+ 194 | pg_node_tree
210 | smgr
705 | unknown
-(2 rows)
+(3 rows)
-- Make sure typarray points to a varlena array type of our own base
SELECT p1.oid, p1.typname as basetype, p2.typname as arraytype,
-- because those are binary-compatible while the reverse goes through
-- texttoxml(), which does an XML syntax check.
-SELECT *
+-- As of 9.1, this finds the cast from pg_node_tree to text, which we
+-- intentionally do not provide a reverse pathway for.
+
+SELECT castsource::regtype, casttarget::regtype, castfunc, castcontext
FROM pg_cast c
WHERE c.castmethod = 'b' AND
NOT EXISTS (SELECT 1 FROM pg_cast k
(p1.typtype != 'c' AND p1.typrelid != 0);
-- Look for basic or enum types that don't have an array type.
--- NOTE: as of 8.0, this check finds smgr and unknown.
+-- NOTE: as of 9.1, this check finds pg_node_tree, smgr, and unknown.
SELECT p1.oid, p1.typname
FROM pg_type as p1
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