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-rw-r--r--src/backend/access/tablesample/tablesample.c9
1 files changed, 6 insertions, 3 deletions
diff --git a/src/backend/access/tablesample/tablesample.c b/src/backend/access/tablesample/tablesample.c
index 3398d02f854..44a24340f6b 100644
--- a/src/backend/access/tablesample/tablesample.c
+++ b/src/backend/access/tablesample/tablesample.c
@@ -78,9 +78,12 @@ tablesample_init(SampleScanState *scanstate, TableSampleClause *tablesample)
fcinfo.argnull[0] = false;
/*
- * Second arg for init function is always REPEATABLE When
- * tablesample->repeatable is NULL then REPEATABLE clause was not
- * specified. When specified, the expression cannot evaluate to NULL.
+ * Second arg for init function is always REPEATABLE.
+ *
+ * If tablesample->repeatable is NULL then REPEATABLE clause was not
+ * specified, and we insert a random value as default.
+ *
+ * When specified, the expression cannot evaluate to NULL.
*/
if (tablesample->repeatable)
{