Update leakproofness markings on some btree comparison functions.

Mark pg_lsn and oidvector comparison functions as leakproof.  Per
discussion, these clearly are leakproof so we might as well mark them so.

On the other hand, remove leakproof markings from name comparison
functions other than equal/not-equal.  Now that these depend on
varstr_cmp, they can't be considered leakproof if text comparison isn't.
(This was my error in commit 586b98fdf.)

While at it, add some opr_sanity queries to catch cases where related
functions do not have the same volatility and leakproof markings.
This would clearly be bogus for commutator or negator pairs.  In the
domain of btree comparison functions, we do have some exceptions,
because text equality is leakproof but inequality comparisons are not.
That's odd on first glance but is reasonable (for now anyway) given
the much greater complexity of the inequality code paths.

Discussion: https://postgr.es/m/20181231172551.GA206480@gust.leadboat.com

src/include/catalog/catversion.h

@@ -53,6 +53,6 @@
  */
 
 /*							yyyymmddN */
-#define CATALOG_VERSION_NO	201812301
+#define CATALOG_VERSION_NO	201812311
 
 #endif

src/include/catalog/pg_proc.dat

@@ -677,44 +677,44 @@
   proname => 'nameeqtext', proleakproof => 't', prorettype => 'bool',
   proargtypes => 'name text', prosrc => 'nameeqtext' },
 { oid => '241',
-  proname => 'namelttext', proleakproof => 't', prorettype => 'bool',
-  proargtypes => 'name text', prosrc => 'namelttext' },
+  proname => 'namelttext', prorettype => 'bool', proargtypes => 'name text',
+  prosrc => 'namelttext' },
 { oid => '242',
-  proname => 'nameletext', proleakproof => 't', prorettype => 'bool',
-  proargtypes => 'name text', prosrc => 'nameletext' },
+  proname => 'nameletext', prorettype => 'bool', proargtypes => 'name text',
+  prosrc => 'nameletext' },
 { oid => '243',
-  proname => 'namegetext', proleakproof => 't', prorettype => 'bool',
-  proargtypes => 'name text', prosrc => 'namegetext' },
+  proname => 'namegetext', prorettype => 'bool', proargtypes => 'name text',
+  prosrc => 'namegetext' },
 { oid => '244',
-  proname => 'namegttext', proleakproof => 't', prorettype => 'bool',
-  proargtypes => 'name text', prosrc => 'namegttext' },
+  proname => 'namegttext', prorettype => 'bool', proargtypes => 'name text',
+  prosrc => 'namegttext' },
 { oid => '245',
   proname => 'namenetext', proleakproof => 't', prorettype => 'bool',
   proargtypes => 'name text', prosrc => 'namenetext' },
 { oid => '246', descr => 'less-equal-greater',
-  proname => 'btnametextcmp', proleakproof => 't', prorettype => 'int4',
-  proargtypes => 'name text', prosrc => 'btnametextcmp' },
+  proname => 'btnametextcmp', prorettype => 'int4', proargtypes => 'name text',
+  prosrc => 'btnametextcmp' },
 { oid => '247',
   proname => 'texteqname', proleakproof => 't', prorettype => 'bool',
   proargtypes => 'text name', prosrc => 'texteqname' },
 { oid => '248',
-  proname => 'textltname', proleakproof => 't', prorettype => 'bool',
-  proargtypes => 'text name', prosrc => 'textltname' },
+  proname => 'textltname', prorettype => 'bool', proargtypes => 'text name',
+  prosrc => 'textltname' },
 { oid => '249',
-  proname => 'textlename', proleakproof => 't', prorettype => 'bool',
-  proargtypes => 'text name', prosrc => 'textlename' },
+  proname => 'textlename', prorettype => 'bool', proargtypes => 'text name',
+  prosrc => 'textlename' },
 { oid => '250',
-  proname => 'textgename', proleakproof => 't', prorettype => 'bool',
-  proargtypes => 'text name', prosrc => 'textgename' },
+  proname => 'textgename', prorettype => 'bool', proargtypes => 'text name',
+  prosrc => 'textgename' },
 { oid => '251',
-  proname => 'textgtname', proleakproof => 't', prorettype => 'bool',
-  proargtypes => 'text name', prosrc => 'textgtname' },
+  proname => 'textgtname', prorettype => 'bool', proargtypes => 'text name',
+  prosrc => 'textgtname' },
 { oid => '252',
   proname => 'textnename', proleakproof => 't', prorettype => 'bool',
   proargtypes => 'text name', prosrc => 'textnename' },
 { oid => '253', descr => 'less-equal-greater',
-  proname => 'bttextnamecmp', proleakproof => 't', prorettype => 'int4',
-  proargtypes => 'text name', prosrc => 'bttextnamecmp' },
+  proname => 'bttextnamecmp', prorettype => 'int4', proargtypes => 'text name',
+  prosrc => 'bttextnamecmp' },
 
 { oid => '266', descr => 'concatenate name and oid',
   proname => 'nameconcatoid', prorettype => 'name', proargtypes => 'name oid',
@@ -982,14 +982,14 @@
   proname => 'btoidsortsupport', prorettype => 'void',
   proargtypes => 'internal', prosrc => 'btoidsortsupport' },
 { oid => '404', descr => 'less-equal-greater',
-  proname => 'btoidvectorcmp', prorettype => 'int4',
+  proname => 'btoidvectorcmp', proleakproof => 't', prorettype => 'int4',
   proargtypes => 'oidvector oidvector', prosrc => 'btoidvectorcmp' },
 { oid => '358', descr => 'less-equal-greater',
   proname => 'btcharcmp', proleakproof => 't', prorettype => 'int4',
   proargtypes => 'char char', prosrc => 'btcharcmp' },
 { oid => '359', descr => 'less-equal-greater',
-  proname => 'btnamecmp', proleakproof => 't', prorettype => 'int4',
-  proargtypes => 'name name', prosrc => 'btnamecmp' },
+  proname => 'btnamecmp', prorettype => 'int4', proargtypes => 'name name',
+  prosrc => 'btnamecmp' },
 { oid => '3135', descr => 'sort support',
   proname => 'btnamesortsupport', prorettype => 'void',
   proargtypes => 'internal', prosrc => 'btnamesortsupport' },
@@ -1308,17 +1308,17 @@
   prosrc => 'int28' },
 
 { oid => '655',
-  proname => 'namelt', proleakproof => 't', prorettype => 'bool',
-  proargtypes => 'name name', prosrc => 'namelt' },
+  proname => 'namelt', prorettype => 'bool', proargtypes => 'name name',
+  prosrc => 'namelt' },
 { oid => '656',
-  proname => 'namele', proleakproof => 't', prorettype => 'bool',
-  proargtypes => 'name name', prosrc => 'namele' },
+  proname => 'namele', prorettype => 'bool', proargtypes => 'name name',
+  prosrc => 'namele' },
 { oid => '657',
-  proname => 'namegt', proleakproof => 't', prorettype => 'bool',
-  proargtypes => 'name name', prosrc => 'namegt' },
+  proname => 'namegt', prorettype => 'bool', proargtypes => 'name name',
+  prosrc => 'namegt' },
 { oid => '658',
-  proname => 'namege', proleakproof => 't', prorettype => 'bool',
-  proargtypes => 'name name', prosrc => 'namege' },
+  proname => 'namege', prorettype => 'bool', proargtypes => 'name name',
+  prosrc => 'namege' },
 { oid => '659',
   proname => 'namene', proleakproof => 't', prorettype => 'bool',
   proargtypes => 'name name', prosrc => 'namene' },
@@ -1335,22 +1335,22 @@
   prosrc => 'varchar' },
 
 { oid => '619',
-  proname => 'oidvectorne', prorettype => 'bool',
+  proname => 'oidvectorne', proleakproof => 't', prorettype => 'bool',
   proargtypes => 'oidvector oidvector', prosrc => 'oidvectorne' },
 { oid => '677',
-  proname => 'oidvectorlt', prorettype => 'bool',
+  proname => 'oidvectorlt', proleakproof => 't', prorettype => 'bool',
   proargtypes => 'oidvector oidvector', prosrc => 'oidvectorlt' },
 { oid => '678',
-  proname => 'oidvectorle', prorettype => 'bool',
+  proname => 'oidvectorle', proleakproof => 't', prorettype => 'bool',
   proargtypes => 'oidvector oidvector', prosrc => 'oidvectorle' },
 { oid => '679',
-  proname => 'oidvectoreq', prorettype => 'bool',
+  proname => 'oidvectoreq', proleakproof => 't', prorettype => 'bool',
   proargtypes => 'oidvector oidvector', prosrc => 'oidvectoreq' },
 { oid => '680',
-  proname => 'oidvectorge', prorettype => 'bool',
+  proname => 'oidvectorge', proleakproof => 't', prorettype => 'bool',
   proargtypes => 'oidvector oidvector', prosrc => 'oidvectorge' },
 { oid => '681',
-  proname => 'oidvectorgt', prorettype => 'bool',
+  proname => 'oidvectorgt', proleakproof => 't', prorettype => 'bool',
   proargtypes => 'oidvector oidvector', prosrc => 'oidvectorgt' },
 
 # OIDS 700 - 799
@@ -8269,23 +8269,23 @@
   proname => 'pg_lsn_out', prorettype => 'cstring', proargtypes => 'pg_lsn',
   prosrc => 'pg_lsn_out' },
 { oid => '3231',
-  proname => 'pg_lsn_lt', prorettype => 'bool', proargtypes => 'pg_lsn pg_lsn',
-  prosrc => 'pg_lsn_lt' },
+  proname => 'pg_lsn_lt', proleakproof => 't', prorettype => 'bool',
+  proargtypes => 'pg_lsn pg_lsn', prosrc => 'pg_lsn_lt' },
 { oid => '3232',
-  proname => 'pg_lsn_le', prorettype => 'bool', proargtypes => 'pg_lsn pg_lsn',
-  prosrc => 'pg_lsn_le' },
+  proname => 'pg_lsn_le', proleakproof => 't', prorettype => 'bool',
+  proargtypes => 'pg_lsn pg_lsn', prosrc => 'pg_lsn_le' },
 { oid => '3233',
-  proname => 'pg_lsn_eq', prorettype => 'bool', proargtypes => 'pg_lsn pg_lsn',
-  prosrc => 'pg_lsn_eq' },
+  proname => 'pg_lsn_eq', proleakproof => 't', prorettype => 'bool',
+  proargtypes => 'pg_lsn pg_lsn', prosrc => 'pg_lsn_eq' },
 { oid => '3234',
-  proname => 'pg_lsn_ge', prorettype => 'bool', proargtypes => 'pg_lsn pg_lsn',
-  prosrc => 'pg_lsn_ge' },
+  proname => 'pg_lsn_ge', proleakproof => 't', prorettype => 'bool',
+  proargtypes => 'pg_lsn pg_lsn', prosrc => 'pg_lsn_ge' },
 { oid => '3235',
-  proname => 'pg_lsn_gt', prorettype => 'bool', proargtypes => 'pg_lsn pg_lsn',
-  prosrc => 'pg_lsn_gt' },
+  proname => 'pg_lsn_gt', proleakproof => 't', prorettype => 'bool',
+  proargtypes => 'pg_lsn pg_lsn', prosrc => 'pg_lsn_gt' },
 { oid => '3236',
-  proname => 'pg_lsn_ne', prorettype => 'bool', proargtypes => 'pg_lsn pg_lsn',
-  prosrc => 'pg_lsn_ne' },
+  proname => 'pg_lsn_ne', proleakproof => 't', prorettype => 'bool',
+  proargtypes => 'pg_lsn pg_lsn', prosrc => 'pg_lsn_ne' },
 { oid => '3237',
   proname => 'pg_lsn_mi', prorettype => 'numeric',
   proargtypes => 'pg_lsn pg_lsn', prosrc => 'pg_lsn_mi' },
@@ -8296,8 +8296,8 @@
   proname => 'pg_lsn_send', prorettype => 'bytea', proargtypes => 'pg_lsn',
   prosrc => 'pg_lsn_send' },
 { oid => '3251', descr => 'less-equal-greater',
-  proname => 'pg_lsn_cmp', prorettype => 'int4', proargtypes => 'pg_lsn pg_lsn',
-  prosrc => 'pg_lsn_cmp' },
+  proname => 'pg_lsn_cmp', proleakproof => 't', prorettype => 'int4',
+  proargtypes => 'pg_lsn pg_lsn', prosrc => 'pg_lsn_cmp' },
 { oid => '3252', descr => 'hash',
   proname => 'pg_lsn_hash', prorettype => 'int4', proargtypes => 'pg_lsn',
   prosrc => 'pg_lsn_hash' },

src/test/regress/expected/opr_sanity.out

@@ -526,19 +526,9 @@ int42ge(integer,smallint)
 oideq(oid,oid)
 oidne(oid,oid)
 nameeqtext(name,text)
-namelttext(name,text)
-nameletext(name,text)
-namegetext(name,text)
-namegttext(name,text)
 namenetext(name,text)
-btnametextcmp(name,text)
 texteqname(text,name)
-textltname(text,name)
-textlename(text,name)
-textgename(text,name)
-textgtname(text,name)
 textnename(text,name)
-bttextnamecmp(text,name)
 float4eq(real,real)
 float4ne(real,real)
 float4lt(real,real)
@@ -569,8 +559,8 @@ btfloat4cmp(real,real)
 btfloat8cmp(double precision,double precision)
 btoidcmp(oid,oid)
 btcharcmp("char","char")
-btnamecmp(name,name)
 cash_cmp(money,money)
+btoidvectorcmp(oidvector,oidvector)
 int8eq(bigint,bigint)
 int8ne(bigint,bigint)
 int8lt(bigint,bigint)
@@ -583,11 +573,13 @@ int84lt(bigint,integer)
 int84gt(bigint,integer)
 int84le(bigint,integer)
 int84ge(bigint,integer)
-namelt(name,name)
-namele(name,name)
-namegt(name,name)
-namege(name,name)
+oidvectorne(oidvector,oidvector)
 namene(name,name)
+oidvectorlt(oidvector,oidvector)
+oidvectorle(oidvector,oidvector)
+oidvectoreq(oidvector,oidvector)
+oidvectorge(oidvector,oidvector)
+oidvectorgt(oidvector,oidvector)
 oidlt(oid,oid)
 oidle(oid,oid)
 macaddr_eq(macaddr,macaddr)
@@ -737,6 +729,13 @@ uuid_ge(uuid,uuid)
 uuid_gt(uuid,uuid)
 uuid_ne(uuid,uuid)
 uuid_cmp(uuid,uuid)
+pg_lsn_lt(pg_lsn,pg_lsn)
+pg_lsn_le(pg_lsn,pg_lsn)
+pg_lsn_eq(pg_lsn,pg_lsn)
+pg_lsn_ge(pg_lsn,pg_lsn)
+pg_lsn_gt(pg_lsn,pg_lsn)
+pg_lsn_ne(pg_lsn,pg_lsn)
+pg_lsn_cmp(pg_lsn,pg_lsn)
 xidneq(xid,xid)
 xidneqint4(xid,integer)
 sha224(bytea)
@@ -1298,6 +1297,54 @@ ORDER BY 1;
   3953 | json_extract_path_text  | get value from json as text with path elements
 (9 rows)
 
+-- Operators that are commutator pairs should have identical volatility
+-- and leakproofness markings on their implementation functions.
+SELECT o1.oid, o1.oprcode, o2.oid, o2.oprcode
+FROM pg_operator AS o1, pg_operator AS o2, pg_proc AS p1, pg_proc AS p2
+WHERE o1.oprcom = o2.oid AND p1.oid = o1.oprcode AND p2.oid = o2.oprcode AND
+    (p1.provolatile != p2.provolatile OR
+     p1.proleakproof != p2.proleakproof);
+ oid | oprcode | oid | oprcode 
+-----+---------+-----+---------
+(0 rows)
+
+-- Likewise for negator pairs.
+SELECT o1.oid, o1.oprcode, o2.oid, o2.oprcode
+FROM pg_operator AS o1, pg_operator AS o2, pg_proc AS p1, pg_proc AS p2
+WHERE o1.oprnegate = o2.oid AND p1.oid = o1.oprcode AND p2.oid = o2.oprcode AND
+    (p1.provolatile != p2.provolatile OR
+     p1.proleakproof != p2.proleakproof);
+ oid | oprcode | oid | oprcode 
+-----+---------+-----+---------
+(0 rows)
+
+-- Btree comparison operators' functions should have the same volatility
+-- and leakproofness markings as the associated comparison support function.
+-- As of Postgres 12, the only exceptions are that textual equality functions
+-- are marked leakproof but textual comparison/inequality functions are not.
+SELECT pp.oid::regprocedure as proc, pp.provolatile as vp, pp.proleakproof as lp,
+       po.oid::regprocedure as opr, po.provolatile as vo, po.proleakproof as lo
+FROM pg_proc pp, pg_proc po, pg_operator o, pg_amproc ap, pg_amop ao
+WHERE pp.oid = ap.amproc AND po.oid = o.oprcode AND o.oid = ao.amopopr AND
+    ao.amopmethod = (SELECT oid FROM pg_am WHERE amname = 'btree') AND
+    ao.amopfamily = ap.amprocfamily AND
+    ao.amoplefttype = ap.amproclefttype AND
+    ao.amoprighttype = ap.amprocrighttype AND
+    ap.amprocnum = 1 AND
+    (pp.provolatile != po.provolatile OR
+     pp.proleakproof != po.proleakproof)
+ORDER BY 1;
+                   proc                    | vp | lp |              opr              | vo | lo 
+-------------------------------------------+----+----+-------------------------------+----+----
+ btnametextcmp(name,text)                  | i  | f  | nameeqtext(name,text)         | i  | t
+ bttextnamecmp(text,name)                  | i  | f  | texteqname(text,name)         | i  | t
+ btnamecmp(name,name)                      | i  | f  | nameeq(name,name)             | i  | t
+ bttextcmp(text,text)                      | i  | f  | texteq(text,text)             | i  | t
+ bpcharcmp(character,character)            | i  | f  | bpchareq(character,character) | i  | t
+ bttext_pattern_cmp(text,text)             | i  | f  | texteq(text,text)             | i  | t
+ btbpchar_pattern_cmp(character,character) | i  | f  | bpchareq(character,character) | i  | t
+(7 rows)
+
 -- **************** pg_aggregate ****************
 -- Look for illegal values in pg_aggregate fields.
 SELECT ctid, aggfnoid::oid

src/test/regress/sql/opr_sanity.sql

@@ -789,6 +789,38 @@ SELECT p_oid, proname, prodesc FROM funcdescs
     AND oprdesc NOT LIKE 'deprecated%'
 ORDER BY 1;
 
+-- Operators that are commutator pairs should have identical volatility
+-- and leakproofness markings on their implementation functions.
+SELECT o1.oid, o1.oprcode, o2.oid, o2.oprcode
+FROM pg_operator AS o1, pg_operator AS o2, pg_proc AS p1, pg_proc AS p2
+WHERE o1.oprcom = o2.oid AND p1.oid = o1.oprcode AND p2.oid = o2.oprcode AND
+    (p1.provolatile != p2.provolatile OR
+     p1.proleakproof != p2.proleakproof);
+
+-- Likewise for negator pairs.
+SELECT o1.oid, o1.oprcode, o2.oid, o2.oprcode
+FROM pg_operator AS o1, pg_operator AS o2, pg_proc AS p1, pg_proc AS p2
+WHERE o1.oprnegate = o2.oid AND p1.oid = o1.oprcode AND p2.oid = o2.oprcode AND
+    (p1.provolatile != p2.provolatile OR
+     p1.proleakproof != p2.proleakproof);
+
+-- Btree comparison operators' functions should have the same volatility
+-- and leakproofness markings as the associated comparison support function.
+-- As of Postgres 12, the only exceptions are that textual equality functions
+-- are marked leakproof but textual comparison/inequality functions are not.
+SELECT pp.oid::regprocedure as proc, pp.provolatile as vp, pp.proleakproof as lp,
+       po.oid::regprocedure as opr, po.provolatile as vo, po.proleakproof as lo
+FROM pg_proc pp, pg_proc po, pg_operator o, pg_amproc ap, pg_amop ao
+WHERE pp.oid = ap.amproc AND po.oid = o.oprcode AND o.oid = ao.amopopr AND
+    ao.amopmethod = (SELECT oid FROM pg_am WHERE amname = 'btree') AND
+    ao.amopfamily = ap.amprocfamily AND
+    ao.amoplefttype = ap.amproclefttype AND
+    ao.amoprighttype = ap.amprocrighttype AND
+    ap.amprocnum = 1 AND
+    (pp.provolatile != po.provolatile OR
+     pp.proleakproof != po.proleakproof)
+ORDER BY 1;
+
 
 -- **************** pg_aggregate ****************