Refer to the default foreign key match style as MATCH SIMPLE internally.

Previously we followed the SQL92 wording, "MATCH <unspecified>", but since
SQL99 there's been a less awkward way to refer to the default style.

In addition to the code changes, pg_constraint.confmatchtype now stores
this match style as 's' (SIMPLE) rather than 'u' (UNSPECIFIED).  This
doesn't affect pg_dump or psql because they use pg_get_constraintdef()
to reconstruct foreign key definitions.  But other client-side code might
examine that column directly, so this change will have to be marked as
an incompatibility in the 9.3 release notes.

doc/src/sgml/catalogs.sgml

@@ -2010,7 +2010,7 @@
       <entry>Foreign key match type:
             <literal>f</> = full,
             <literal>p</> = partial,
-            <literal>u</> = simple (unspecified)
+            <literal>s</> = simple
           </entry>
      </row>
 

src/backend/catalog/information_schema.sql

@@ -1160,7 +1160,7 @@ CREATE VIEW referential_constraints AS
            CAST(
              CASE con.confmatchtype WHEN 'f' THEN 'FULL'
                                     WHEN 'p' THEN 'PARTIAL'
-                                    WHEN 'u' THEN 'NONE' END
+                                    WHEN 's' THEN 'NONE' END
              AS character_data) AS match_option,
 
            CAST(

src/backend/commands/trigger.c

@@ -805,7 +805,7 @@ ConvertTriggerToFK(CreateTrigStmt *stmt, Oid funcoid)
 	char	   *constr_name;
 	char	   *fk_table_name;
 	char	   *pk_table_name;
-	char		fk_matchtype = FKCONSTR_MATCH_UNSPECIFIED;
+	char		fk_matchtype = FKCONSTR_MATCH_SIMPLE;
 	List	   *fk_attrs = NIL;
 	List	   *pk_attrs = NIL;
 	StringInfoData buf;
@@ -831,7 +831,7 @@ ConvertTriggerToFK(CreateTrigStmt *stmt, Oid funcoid)
 			if (strcmp(strVal(arg), "FULL") == 0)
 				fk_matchtype = FKCONSTR_MATCH_FULL;
 			else
-				fk_matchtype = FKCONSTR_MATCH_UNSPECIFIED;
+				fk_matchtype = FKCONSTR_MATCH_SIMPLE;
 			continue;
 		}
 		if (i % 2)

src/backend/parser/gram.y

@@ -2972,11 +2972,11 @@ key_match:  MATCH FULL
 			}
 		| MATCH SIMPLE
 			{
-				$$ = FKCONSTR_MATCH_UNSPECIFIED;
+				$$ = FKCONSTR_MATCH_SIMPLE;
 			}
 		| /*EMPTY*/
 			{
-				$$ = FKCONSTR_MATCH_UNSPECIFIED;
+				$$ = FKCONSTR_MATCH_SIMPLE;
 			}
 		;
 

src/backend/utils/adt/ri_triggers.c

@@ -384,8 +384,7 @@ RI_FKey_check(PG_FUNCTION_ARGS)
 			 * No check - if NULLs are allowed at all is already checked by
 			 * NOT NULL constraint.
 			 *
-			 * This is true for MATCH FULL, MATCH PARTIAL, and MATCH
+			 * This is true for MATCH FULL, MATCH PARTIAL, and MATCH SIMPLE.
-			 * <unspecified>
 			 */
 			heap_close(pk_rel, RowShareLock);
 			return PointerGetDatum(NULL);
@@ -413,11 +412,10 @@ RI_FKey_check(PG_FUNCTION_ARGS)
 					heap_close(pk_rel, RowShareLock);
 					return PointerGetDatum(NULL);
 
-				case FKCONSTR_MATCH_UNSPECIFIED:
+				case FKCONSTR_MATCH_SIMPLE:
 
 					/*
-					 * MATCH <unspecified> - if ANY column is null, we have a
+					 * MATCH SIMPLE - if ANY column is null, we have a match.
-					 * match.
 					 */
 					heap_close(pk_rel, RowShareLock);
 					return PointerGetDatum(NULL);
@@ -435,6 +433,11 @@ RI_FKey_check(PG_FUNCTION_ARGS)
 							 errmsg("MATCH PARTIAL not yet implemented")));
 					heap_close(pk_rel, RowShareLock);
 					return PointerGetDatum(NULL);
+
+				default:
+					elog(ERROR, "unrecognized confmatchtype: %d",
+						 riinfo.confmatchtype);
+					break;
 			}
 
 		case RI_KEYS_NONE_NULL:
@@ -577,10 +580,10 @@ ri_Check_Pk_Match(Relation pk_rel, Relation fk_rel,
 			switch (riinfo->confmatchtype)
 			{
 				case FKCONSTR_MATCH_FULL:
-				case FKCONSTR_MATCH_UNSPECIFIED:
+				case FKCONSTR_MATCH_SIMPLE:
 
 					/*
-					 * MATCH <unspecified>/FULL  - if ANY column is null, we
+					 * MATCH SIMPLE/FULL  - if ANY column is null, we
 					 * can't be matching to this row already.
 					 */
 					return true;
@@ -597,6 +600,11 @@ ri_Check_Pk_Match(Relation pk_rel, Relation fk_rel,
 							(errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
 							 errmsg("MATCH PARTIAL not yet implemented")));
 					break;
+
+				default:
+					elog(ERROR, "unrecognized confmatchtype: %d",
+						 riinfo->confmatchtype);
+					break;
 			}
 
 		case RI_KEYS_NONE_NULL:
@@ -732,12 +740,12 @@ RI_FKey_noaction_del(PG_FUNCTION_ARGS)
 	{
 			/* ----------
 			 * SQL3 11.9 <referential constraint definition>
-			 *	Gereral rules 6) a) iv):
+			 *	General rules 6) a) iv):
-			 *		MATCH <unspecified> or MATCH FULL
+			 *		MATCH SIMPLE/FULL
 			 *			... ON DELETE CASCADE
 			 * ----------
 			 */
-		case FKCONSTR_MATCH_UNSPECIFIED:
+		case FKCONSTR_MATCH_SIMPLE:
 		case FKCONSTR_MATCH_FULL:
 			ri_BuildQueryKeyFull(&qkey, &riinfo,
 								 RI_PLAN_NOACTION_DEL_CHECKREF);
@@ -837,12 +845,14 @@ RI_FKey_noaction_del(PG_FUNCTION_ARGS)
 					(errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
 					 errmsg("MATCH PARTIAL not yet implemented")));
 			return PointerGetDatum(NULL);
+
+		default:
+			elog(ERROR, "unrecognized confmatchtype: %d",
+				 riinfo.confmatchtype);
+			break;
 	}
 
-	/*
+	/* Never reached */
-	 * Never reached
-	 */
-	elog(ERROR, "invalid confmatchtype");
 	return PointerGetDatum(NULL);
 }
 
@@ -901,12 +911,12 @@ RI_FKey_noaction_upd(PG_FUNCTION_ARGS)
 	{
 			/* ----------
 			 * SQL3 11.9 <referential constraint definition>
-			 *	Gereral rules 6) a) iv):
+			 *	General rules 6) a) iv):
-			 *		MATCH <unspecified> or MATCH FULL
+			 *		MATCH SIMPLE/FULL
 			 *			... ON DELETE CASCADE
 			 * ----------
 			 */
-		case FKCONSTR_MATCH_UNSPECIFIED:
+		case FKCONSTR_MATCH_SIMPLE:
 		case FKCONSTR_MATCH_FULL:
 			ri_BuildQueryKeyFull(&qkey, &riinfo,
 								 RI_PLAN_NOACTION_UPD_CHECKREF);
@@ -1025,12 +1035,14 @@ RI_FKey_noaction_upd(PG_FUNCTION_ARGS)
 					(errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
 					 errmsg("MATCH PARTIAL not yet implemented")));
 			return PointerGetDatum(NULL);
+
+		default:
+			elog(ERROR, "unrecognized confmatchtype: %d",
+				 riinfo.confmatchtype);
+			break;
 	}
 
-	/*
+	/* Never reached */
-	 * Never reached
-	 */
-	elog(ERROR, "invalid confmatchtype");
 	return PointerGetDatum(NULL);
 }
 
@@ -1084,12 +1096,12 @@ RI_FKey_cascade_del(PG_FUNCTION_ARGS)
 	{
 			/* ----------
 			 * SQL3 11.9 <referential constraint definition>
-			 *	Gereral rules 6) a) i):
+			 *	General rules 6) a) i):
-			 *		MATCH <unspecified> or MATCH FULL
+			 *		MATCH SIMPLE/FULL
 			 *			... ON DELETE CASCADE
 			 * ----------
 			 */
-		case FKCONSTR_MATCH_UNSPECIFIED:
+		case FKCONSTR_MATCH_SIMPLE:
 		case FKCONSTR_MATCH_FULL:
 			ri_BuildQueryKeyFull(&qkey, &riinfo,
 								 RI_PLAN_CASCADE_DEL_DODELETE);
@@ -1187,12 +1199,14 @@ RI_FKey_cascade_del(PG_FUNCTION_ARGS)
 					(errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
 					 errmsg("MATCH PARTIAL not yet implemented")));
 			return PointerGetDatum(NULL);
+
+		default:
+			elog(ERROR, "unrecognized confmatchtype: %d",
+				 riinfo.confmatchtype);
+			break;
 	}
 
-	/*
+	/* Never reached */
-	 * Never reached
-	 */
-	elog(ERROR, "invalid confmatchtype");
 	return PointerGetDatum(NULL);
 }
 
@@ -1250,12 +1264,12 @@ RI_FKey_cascade_upd(PG_FUNCTION_ARGS)
 	{
 			/* ----------
 			 * SQL3 11.9 <referential constraint definition>
-			 *	Gereral rules 7) a) i):
+			 *	General rules 7) a) i):
-			 *		MATCH <unspecified> or MATCH FULL
+			 *		MATCH SIMPLE/FULL
 			 *			... ON UPDATE CASCADE
 			 * ----------
 			 */
-		case FKCONSTR_MATCH_UNSPECIFIED:
+		case FKCONSTR_MATCH_SIMPLE:
 		case FKCONSTR_MATCH_FULL:
 			ri_BuildQueryKeyFull(&qkey, &riinfo,
 								 RI_PLAN_CASCADE_UPD_DOUPDATE);
@@ -1375,12 +1389,14 @@ RI_FKey_cascade_upd(PG_FUNCTION_ARGS)
 					(errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
 					 errmsg("MATCH PARTIAL not yet implemented")));
 			return PointerGetDatum(NULL);
+
+		default:
+			elog(ERROR, "unrecognized confmatchtype: %d",
+				 riinfo.confmatchtype);
+			break;
 	}
 
-	/*
+	/* Never reached */
-	 * Never reached
-	 */
-	elog(ERROR, "invalid confmatchtype");
 	return PointerGetDatum(NULL);
 }
 
@@ -1441,12 +1457,12 @@ RI_FKey_restrict_del(PG_FUNCTION_ARGS)
 	{
 			/* ----------
 			 * SQL3 11.9 <referential constraint definition>
-			 *	Gereral rules 6) a) iv):
+			 *	General rules 6) a) iv):
-			 *		MATCH <unspecified> or MATCH FULL
+			 *		MATCH SIMPLE/FULL
 			 *			... ON DELETE CASCADE
 			 * ----------
 			 */
-		case FKCONSTR_MATCH_UNSPECIFIED:
+		case FKCONSTR_MATCH_SIMPLE:
 		case FKCONSTR_MATCH_FULL:
 			ri_BuildQueryKeyFull(&qkey, &riinfo,
 								 RI_PLAN_RESTRICT_DEL_CHECKREF);
@@ -1546,12 +1562,14 @@ RI_FKey_restrict_del(PG_FUNCTION_ARGS)
 					(errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
 					 errmsg("MATCH PARTIAL not yet implemented")));
 			return PointerGetDatum(NULL);
+
+		default:
+			elog(ERROR, "unrecognized confmatchtype: %d",
+				 riinfo.confmatchtype);
+			break;
 	}
 
-	/*
+	/* Never reached */
-	 * Never reached
-	 */
-	elog(ERROR, "invalid confmatchtype");
 	return PointerGetDatum(NULL);
 }
 
@@ -1615,12 +1633,12 @@ RI_FKey_restrict_upd(PG_FUNCTION_ARGS)
 	{
 			/* ----------
 			 * SQL3 11.9 <referential constraint definition>
-			 *	Gereral rules 6) a) iv):
+			 *	General rules 6) a) iv):
-			 *		MATCH <unspecified> or MATCH FULL
+			 *		MATCH SIMPLE/FULL
 			 *			... ON DELETE CASCADE
 			 * ----------
 			 */
-		case FKCONSTR_MATCH_UNSPECIFIED:
+		case FKCONSTR_MATCH_SIMPLE:
 		case FKCONSTR_MATCH_FULL:
 			ri_BuildQueryKeyFull(&qkey, &riinfo,
 								 RI_PLAN_RESTRICT_UPD_CHECKREF);
@@ -1729,12 +1747,14 @@ RI_FKey_restrict_upd(PG_FUNCTION_ARGS)
 					(errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
 					 errmsg("MATCH PARTIAL not yet implemented")));
 			return PointerGetDatum(NULL);
+
+		default:
+			elog(ERROR, "unrecognized confmatchtype: %d",
+				 riinfo.confmatchtype);
+			break;
 	}
 
-	/*
+	/* Never reached */
-	 * Never reached
-	 */
-	elog(ERROR, "invalid confmatchtype");
 	return PointerGetDatum(NULL);
 }
 
@@ -1788,12 +1808,12 @@ RI_FKey_setnull_del(PG_FUNCTION_ARGS)
 	{
 			/* ----------
 			 * SQL3 11.9 <referential constraint definition>
-			 *	Gereral rules 6) a) ii):
+			 *	General rules 6) a) ii):
-			 *		MATCH <UNSPECIFIED> or MATCH FULL
+			 *		MATCH SIMPLE/FULL
 			 *			... ON DELETE SET NULL
 			 * ----------
 			 */
-		case FKCONSTR_MATCH_UNSPECIFIED:
+		case FKCONSTR_MATCH_SIMPLE:
 		case FKCONSTR_MATCH_FULL:
 			ri_BuildQueryKeyFull(&qkey, &riinfo,
 								 RI_PLAN_SETNULL_DEL_DOUPDATE);
@@ -1900,12 +1920,14 @@ RI_FKey_setnull_del(PG_FUNCTION_ARGS)
 					(errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
 					 errmsg("MATCH PARTIAL not yet implemented")));
 			return PointerGetDatum(NULL);
+
+		default:
+			elog(ERROR, "unrecognized confmatchtype: %d",
+				 riinfo.confmatchtype);
+			break;
 	}
 
-	/*
+	/* Never reached */
-	 * Never reached
-	 */
-	elog(ERROR, "invalid confmatchtype");
 	return PointerGetDatum(NULL);
 }
 
@@ -1962,12 +1984,12 @@ RI_FKey_setnull_upd(PG_FUNCTION_ARGS)
 	{
 			/* ----------
 			 * SQL3 11.9 <referential constraint definition>
-			 *	Gereral rules 7) a) ii) 2):
+			 *	General rules 7) a) ii) 2):
 			 *		MATCH FULL
 			 *			... ON UPDATE SET NULL
 			 * ----------
 			 */
-		case FKCONSTR_MATCH_UNSPECIFIED:
+		case FKCONSTR_MATCH_SIMPLE:
 		case FKCONSTR_MATCH_FULL:
 			ri_BuildQueryKeyFull(&qkey, &riinfo,
 								 RI_PLAN_SETNULL_UPD_DOUPDATE);
@@ -2005,7 +2027,7 @@ RI_FKey_setnull_upd(PG_FUNCTION_ARGS)
 				elog(ERROR, "SPI_connect failed");
 
 			/*
-			 * "MATCH <unspecified>" only changes columns corresponding to the
+			 * "MATCH SIMPLE" only changes columns corresponding to the
 			 * referenced columns that have changed in pk_rel.	This means the
 			 * "SET attrn=NULL [, attrn=NULL]" string will be change as well.
 			 * In this case, we need to build a temporary plan rather than use
@@ -2060,7 +2082,7 @@ RI_FKey_setnull_upd(PG_FUNCTION_ARGS)
 								 RIAttName(fk_rel, riinfo.fk_attnums[i]));
 
 					/*
-					 * MATCH <unspecified> - only change columns corresponding
+					 * MATCH SIMPLE - only change columns corresponding
 					 * to changed columns in pk_rel's key
 					 */
 					if (riinfo.confmatchtype == FKCONSTR_MATCH_FULL ||
@@ -2116,12 +2138,14 @@ RI_FKey_setnull_upd(PG_FUNCTION_ARGS)
 					(errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
 					 errmsg("MATCH PARTIAL not yet implemented")));
 			return PointerGetDatum(NULL);
+
+		default:
+			elog(ERROR, "unrecognized confmatchtype: %d",
+				 riinfo.confmatchtype);
+			break;
 	}
 
-	/*
+	/* Never reached */
-	 * Never reached
-	 */
-	elog(ERROR, "invalid confmatchtype");
 	return PointerGetDatum(NULL);
 }
 
@@ -2174,12 +2198,12 @@ RI_FKey_setdefault_del(PG_FUNCTION_ARGS)
 	{
 			/* ----------
 			 * SQL3 11.9 <referential constraint definition>
-			 *	Gereral rules 6) a) iii):
+			 *	General rules 6) a) iii):
-			 *		MATCH <UNSPECIFIED> or MATCH FULL
+			 *		MATCH SIMPLE/FULL
 			 *			... ON DELETE SET DEFAULT
 			 * ----------
 			 */
-		case FKCONSTR_MATCH_UNSPECIFIED:
+		case FKCONSTR_MATCH_SIMPLE:
 		case FKCONSTR_MATCH_FULL:
 			ri_BuildQueryKeyFull(&qkey, &riinfo,
 								 RI_PLAN_SETNULL_DEL_DOUPDATE);
@@ -2298,12 +2322,14 @@ RI_FKey_setdefault_del(PG_FUNCTION_ARGS)
 					(errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
 					 errmsg("MATCH PARTIAL not yet implemented")));
 			return PointerGetDatum(NULL);
+
+		default:
+			elog(ERROR, "unrecognized confmatchtype: %d",
+				 riinfo.confmatchtype);
+			break;
 	}
 
-	/*
+	/* Never reached */
-	 * Never reached
-	 */
-	elog(ERROR, "invalid confmatchtype");
 	return PointerGetDatum(NULL);
 }
 
@@ -2358,12 +2384,12 @@ RI_FKey_setdefault_upd(PG_FUNCTION_ARGS)
 	{
 			/* ----------
 			 * SQL3 11.9 <referential constraint definition>
-			 *	Gereral rules 7) a) iii):
+			 *	General rules 7) a) iii):
-			 *		MATCH <UNSPECIFIED> or MATCH FULL
+			 *		MATCH SIMPLE/FULL
 			 *			... ON UPDATE SET DEFAULT
 			 * ----------
 			 */
-		case FKCONSTR_MATCH_UNSPECIFIED:
+		case FKCONSTR_MATCH_SIMPLE:
 		case FKCONSTR_MATCH_FULL:
 			ri_BuildQueryKeyFull(&qkey, &riinfo,
 								 RI_PLAN_SETNULL_DEL_DOUPDATE);
@@ -2439,7 +2465,7 @@ RI_FKey_setdefault_upd(PG_FUNCTION_ARGS)
 								 RIAttName(fk_rel, riinfo.fk_attnums[i]));
 
 					/*
-					 * MATCH <unspecified> - only change columns corresponding
+					 * MATCH SIMPLE - only change columns corresponding
 					 * to changed columns in pk_rel's key
 					 */
 					if (riinfo.confmatchtype == FKCONSTR_MATCH_FULL ||
@@ -2501,12 +2527,14 @@ RI_FKey_setdefault_upd(PG_FUNCTION_ARGS)
 					(errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
 					 errmsg("MATCH PARTIAL not yet implemented")));
 			return PointerGetDatum(NULL);
+
+		default:
+			elog(ERROR, "unrecognized confmatchtype: %d",
+				 riinfo.confmatchtype);
+			break;
 	}
 
-	/*
+	/* Never reached */
-	 * Never reached
-	 */
-	elog(ERROR, "invalid confmatchtype");
 	return PointerGetDatum(NULL);
 }
 
@@ -2538,7 +2566,7 @@ RI_FKey_keyequal_upd_pk(Trigger *trigger, Relation pk_rel,
 
 	switch (riinfo.confmatchtype)
 	{
-		case FKCONSTR_MATCH_UNSPECIFIED:
+		case FKCONSTR_MATCH_SIMPLE:
 		case FKCONSTR_MATCH_FULL:
 			/* Return true if keys are equal */
 			return ri_KeysEqual(pk_rel, old_row, new_row, &riinfo, true);
@@ -2549,10 +2577,14 @@ RI_FKey_keyequal_upd_pk(Trigger *trigger, Relation pk_rel,
 					(errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
 					 errmsg("MATCH PARTIAL not yet implemented")));
 			break;
+
+		default:
+			elog(ERROR, "unrecognized confmatchtype: %d",
+				 riinfo.confmatchtype);
+			break;
 	}
 
 	/* Never reached */
-	elog(ERROR, "invalid confmatchtype");
 	return false;
 }
 
@@ -2583,7 +2615,7 @@ RI_FKey_keyequal_upd_fk(Trigger *trigger, Relation fk_rel,
 
 	switch (riinfo.confmatchtype)
 	{
-		case FKCONSTR_MATCH_UNSPECIFIED:
+		case FKCONSTR_MATCH_SIMPLE:
 		case FKCONSTR_MATCH_FULL:
 			/* Return true if keys are equal */
 			return ri_KeysEqual(fk_rel, old_row, new_row, &riinfo, false);
@@ -2594,10 +2626,14 @@ RI_FKey_keyequal_upd_fk(Trigger *trigger, Relation fk_rel,
 					(errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
 					 errmsg("MATCH PARTIAL not yet implemented")));
 			break;
+
+		default:
+			elog(ERROR, "unrecognized confmatchtype: %d",
+				 riinfo.confmatchtype);
+			break;
 	}
 
 	/* Never reached */
-	elog(ERROR, "invalid confmatchtype");
 	return false;
 }
 
@@ -2680,7 +2716,7 @@ RI_Initial_Check(Trigger *trigger, Relation fk_rel, Relation pk_rel)
 	 *	 LEFT OUTER JOIN ONLY pkrelname pk
 	 *	 ON (pk.pkkeycol1=fk.keycol1 [AND ...])
 	 *	 WHERE pk.pkkeycol1 IS NULL AND
-	 * For MATCH unspecified:
+	 * For MATCH SIMPLE:
 	 *	 (fk.keycol1 IS NOT NULL [AND ...])
 	 * For MATCH FULL:
 	 *	 (fk.keycol1 IS NOT NULL [OR ...])
@@ -2745,7 +2781,7 @@ RI_Initial_Check(Trigger *trigger, Relation fk_rel, Relation pk_rel)
 						 sep, fkattname);
 		switch (riinfo.confmatchtype)
 		{
-			case FKCONSTR_MATCH_UNSPECIFIED:
+			case FKCONSTR_MATCH_SIMPLE:
 				sep = " AND ";
 				break;
 			case FKCONSTR_MATCH_FULL:
@@ -2757,7 +2793,7 @@ RI_Initial_Check(Trigger *trigger, Relation fk_rel, Relation pk_rel)
 						 errmsg("MATCH PARTIAL not yet implemented")));
 				break;
 			default:
-				elog(ERROR, "unrecognized match type: %d",
+				elog(ERROR, "unrecognized confmatchtype: %d",
 					 riinfo.confmatchtype);
 				break;
 		}

src/backend/utils/adt/ruleutils.c

@@ -1184,7 +1184,7 @@ pg_get_constraintdef_worker(Oid constraintId, bool fullCommand,
 					case FKCONSTR_MATCH_PARTIAL:
 						string = " MATCH PARTIAL";
 						break;
-					case FKCONSTR_MATCH_UNSPECIFIED:
+					case FKCONSTR_MATCH_SIMPLE:
 						string = "";
 						break;
 					default:

src/include/catalog/catversion.h

@@ -53,6 +53,6 @@
  */
 
 /*							yyyymmddN */
-#define CATALOG_VERSION_NO	201206141
+#define CATALOG_VERSION_NO	201206171
 
 #endif

src/include/nodes/parsenodes.h

@@ -1514,7 +1514,7 @@ typedef enum ConstrType			/* types of constraints */
 /* Foreign key matchtype codes */
 #define FKCONSTR_MATCH_FULL			'f'
 #define FKCONSTR_MATCH_PARTIAL		'p'
-#define FKCONSTR_MATCH_UNSPECIFIED	'u'
+#define FKCONSTR_MATCH_SIMPLE		's'
 
 typedef struct Constraint
 {
@@ -1550,7 +1550,7 @@ typedef struct Constraint
 	RangeVar   *pktable;		/* Primary key table */
 	List	   *fk_attrs;		/* Attributes of foreign key */
 	List	   *pk_attrs;		/* Corresponding attrs in PK table */
-	char		fk_matchtype;	/* FULL, PARTIAL, UNSPECIFIED */
+	char		fk_matchtype;	/* FULL, PARTIAL, SIMPLE */
 	char		fk_upd_action;	/* ON UPDATE action */
 	char		fk_del_action;	/* ON DELETE action */
 	List	   *old_conpfeqop;	/* pg_constraint.conpfeqop of my former self */

src/test/regress/expected/foreign_key.out

@@ -339,7 +339,7 @@ SELECT * FROM PKTABLE;
 
 DROP TABLE FKTABLE;
 DROP TABLE PKTABLE;
--- MATCH unspecified
+-- MATCH SIMPLE
 -- Base test restricting update/delete
 CREATE TABLE PKTABLE ( ptest1 int, ptest2 int, ptest3 int, ptest4 text, PRIMARY KEY(ptest1, ptest2, ptest3) );
 NOTICE:  CREATE TABLE / PRIMARY KEY will create implicit index "pktable_pkey" for table "pktable"

src/test/regress/sql/foreign_key.sql

@@ -214,7 +214,7 @@ DROP TABLE FKTABLE;
 DROP TABLE PKTABLE;
 
 
--- MATCH unspecified
+-- MATCH SIMPLE
 
 -- Base test restricting update/delete
 CREATE TABLE PKTABLE ( ptest1 int, ptest2 int, ptest3 int, ptest4 text, PRIMARY KEY(ptest1, ptest2, ptest3) );