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-rw-r--r--src/include/nodes/nodes.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/include/nodes/nodes.h b/src/include/nodes/nodes.h
index b3ee4194d39..e0057daa061 100644
--- a/src/include/nodes/nodes.h
+++ b/src/include/nodes/nodes.h
@@ -668,6 +668,7 @@ extern bool equal(const void *a, const void *b);
*/
typedef double Selectivity; /* fraction of tuples a qualifier will pass */
typedef double Cost; /* execution cost (in page-access units) */
+typedef double Cardinality; /* (estimated) number of rows or other integer count */
/*