From 4db485e75b9672126963ae4052b50f473b30a097 Mon Sep 17 00:00:00 2001
From: Tom Lane
Date: Mon, 18 May 2015 18:34:37 -0400
Subject: Put back a backwards-compatible version of sampling support
 functions.

Commit 83e176ec18d2a91dbea1d0d1bd94c38dc47cd77c removed the longstanding
support functions for block sampling without any consideration of the
impact this would have on third-party FDWs.  The new API is not notably
more functional for FDWs than the old, so forcing them to change doesn't
seem like a good thing.  We can provide the old API as a wrapper (more
or less) around the new one for a minimal amount of extra code.
---
 src/include/commands/vacuum.h | 5 +++++
 1 file changed, 5 insertions(+)

(limited to 'src/include/commands')

diff --git a/src/include/commands/vacuum.h b/src/include/commands/vacuum.h
index ce7b28d22c7..4fb91e79cba 100644
--- a/src/include/commands/vacuum.h
+++ b/src/include/commands/vacuum.h
@@ -198,4 +198,9 @@ extern void analyze_rel(Oid relid, RangeVar *relation, int options,
 			BufferAccessStrategy bstrategy);
 extern bool std_typanalyze(VacAttrStats *stats);
 
+/* in utils/misc/sampling.c --- duplicate of declarations in utils/sampling.h */
+extern double anl_random_fract(void);
+extern double anl_init_selection_state(int n);
+extern double anl_get_next_S(double t, int n, double *stateptr);
+
 #endif   /* VACUUM_H */
-- 
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