Fix comment in extended_stats_funcs.c

The attribute storing the statistics data for a set of expressions in
pg_statistic_ext_data is stxdexpr.  stxdexprs does not exist.

Extracted from a larger patch by the same author.  Incorrect as of
efbebb4e8587.

Author: Corey Huinker <corey.huinker@gmail.com>
Discussion: https://postgr.es/m/CADkLM=fPcci6oPyuyEZ0F4bWqAA7HzaWO+ZPptufuX5_uWt6kw@mail.gmail.com

diff --git a/src/backend/statistics/extended_stats_funcs.c b/src/backend/statistics/extended_stats_funcs.c
index db107684607311a7b9794061e57f70c06ea6a831..b640941a9cc6e88114bcebad6ff9e3efa1f189c6 100644 (file)
--- a/src/backend/statistics/extended_stats_funcs.c
+++ b/src/backend/statistics/extended_stats_funcs.c
@@ -539,7 +539,7 @@ extended_statistics_update(FunctionCallInfo fcinfo)
                /*
                 * After all the positive number attnums in stxkeys come the negative
                 * numbers (if any) which represent expressions in the order that they
-                * appear in stxdexprs.  Because the expressions are always
+                * appear in stxdexpr.  Because the expressions are always
                 * monotonically decreasing from -1, there is no point in looking at
                 * the values in stxkeys, it's enough to know how many of them there
                 * are.