Use correct spelling of statistics kind

A couple error messages and comments used 'statistic kind', not the
correct 'statistics kind'. Fix and backpatch all the way back to 10,
where extended statistics were introduced.

Backpatch-through: 10

6 files changed, 6 insertions, 6 deletions

diff --git a/doc/src/sgml/catalogs.sgml b/doc/src/sgml/catalogs.sgml
index 1429b2d05c8..304196c2163 100644
--- a/doc/src/sgml/catalogs.sgml
+++ b/doc/src/sgml/catalogs.sgml
@@ -6596,7 +6596,7 @@ SCRAM-SHA-256$<replaceable>&lt;iteration count&gt;</replaceable>:<replaceable>&l
       <entry><type>char[]</type></entry>
       <entry></entry>
       <entry>
-        An array containing codes for the enabled statistic kinds;
+        An array containing codes for the enabled statistics kinds;
         valid values are:
         <literal>d</literal> for n-distinct statistics,
         <literal>f</literal> for functional dependency statistics, and
diff --git a/src/backend/statistics/dependencies.c b/src/backend/statistics/dependencies.c
index 560c1c9e845..44dd5b2762e 100644
--- a/src/backend/statistics/dependencies.c
+++ b/src/backend/statistics/dependencies.c
@@ -646,7 +646,7 @@ statext_dependencies_load(Oid mvoid)
 						   Anum_pg_statistic_ext_data_stxddependencies, &isnull);
 	if (isnull)
 		elog(ERROR,
-			 "requested statistic kind \"%c\" is not yet built for statistics object %u",
+			 "requested statistics kind \"%c\" is not yet built for statistics object %u",
 			 STATS_EXT_DEPENDENCIES, mvoid);
 
 	result = statext_dependencies_deserialize(DatumGetByteaPP(deps));
diff --git a/src/backend/statistics/extended_stats.c b/src/backend/statistics/extended_stats.c
index d8e51500232..8951543b7eb 100644
--- a/src/backend/statistics/extended_stats.c
+++ b/src/backend/statistics/extended_stats.c
@@ -60,7 +60,7 @@ typedef struct StatExtEntry
 	char	   *schema;			/* statistics object's schema */
 	char	   *name;			/* statistics object's name */
 	Bitmapset  *columns;		/* attribute numbers covered by the object */
-	List	   *types;			/* 'char' list of enabled statistic kinds */
+	List	   *types;			/* 'char' list of enabled statistics kinds */
 } StatExtEntry;
 
 
diff --git a/src/backend/statistics/mcv.c b/src/backend/statistics/mcv.c
index cec06f8c444..8443f412bad 100644
--- a/src/backend/statistics/mcv.c
+++ b/src/backend/statistics/mcv.c
@@ -571,7 +571,7 @@ statext_mcv_load(Oid mvoid)
 
 	if (isnull)
 		elog(ERROR,
-			 "requested statistic kind \"%c\" is not yet built for statistics object %u",
+			 "requested statistics kind \"%c\" is not yet built for statistics object %u",
 			 STATS_EXT_DEPENDENCIES, mvoid);
 
 	result = statext_mcv_deserialize(DatumGetByteaP(mcvlist));
diff --git a/src/backend/statistics/mvdistinct.c b/src/backend/statistics/mvdistinct.c
index 228fa2684fe..682ba08a4c3 100644
--- a/src/backend/statistics/mvdistinct.c
+++ b/src/backend/statistics/mvdistinct.c
@@ -154,7 +154,7 @@ statext_ndistinct_load(Oid mvoid)
 							Anum_pg_statistic_ext_data_stxdndistinct, &isnull);
 	if (isnull)
 		elog(ERROR,
-			 "requested statistic kind \"%c\" is not yet built for statistics object %u",
+			 "requested statistics kind \"%c\" is not yet built for statistics object %u",
 			 STATS_EXT_NDISTINCT, mvoid);
 
 	result = statext_ndistinct_deserialize(DatumGetByteaPP(ndist));
diff --git a/src/include/nodes/pathnodes.h b/src/include/nodes/pathnodes.h
index 5de52edda4a..b6d4b0eda0a 100644
--- a/src/include/nodes/pathnodes.h
+++ b/src/include/nodes/pathnodes.h
@@ -878,7 +878,7 @@ typedef struct StatisticExtInfo
 
 	Oid			statOid;		/* OID of the statistics row */
 	RelOptInfo *rel;			/* back-link to statistic's table */
-	char		kind;			/* statistic kind of this entry */
+	char		kind;			/* statistics kind of this entry */
 	Bitmapset  *keys;			/* attnums of the columns covered */
 } StatisticExtInfo;