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-rw-r--r--src/include/c.h6
1 files changed, 6 insertions, 0 deletions
diff --git a/src/include/c.h b/src/include/c.h
index 802a731267..00e41ac546 100644
--- a/src/include/c.h
+++ b/src/include/c.h
@@ -491,6 +491,12 @@ typedef signed int Offset;
typedef float float4;
typedef double float8;
+#ifdef USE_FLOAT8_BYVAL
+#define FLOAT8PASSBYVAL true
+#else
+#define FLOAT8PASSBYVAL false
+#endif
+
/*
* Oid, RegProcedure, TransactionId, SubTransactionId, MultiXactId,
* CommandId