diff options
| -rw-r--r-- | src/include/catalog/pg_statistic.h | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/src/include/catalog/pg_statistic.h b/src/include/catalog/pg_statistic.h index 0808c5fc893..87f48dc6894 100644 --- a/src/include/catalog/pg_statistic.h +++ b/src/include/catalog/pg_statistic.h @@ -152,6 +152,9 @@ DECLARE_FOREIGN_KEY((starelid, staattnum), pg_attribute, (attrelid, attnum)); * data "kind" will appear in any particular slot. Instead, search the * stakind fields to see if the desired data is available. (The standard * function get_attstatsslot() may be used for this.) + * + * Note: The pg_stats view needs to be modified whenever a new slot kind is + * added to core. */ /* @@ -262,7 +265,8 @@ DECLARE_FOREIGN_KEY((starelid, staattnum), pg_attribute, (attrelid, attnum)); * a format similar to STATISTIC_KIND_HISTOGRAM: it contains M (>=2) range * values that divide the column data values into M-1 bins of approximately * equal population. The lengths are stored as float8s, as measured by the - * range type's subdiff function. Only non-null rows are considered. + * range type's subdiff function. Only non-null, non-empty rows are + * considered. */ #define STATISTIC_KIND_RANGE_LENGTH_HISTOGRAM 6 |