From 74a6fa8fd4b767d28bc221199cb1429ccbc5ede5 Mon Sep 17 00:00:00 2001
From: Julien Rouhaud <julien.rouhaud@free.fr>
Date: Sat, 3 Mar 2018 11:40:32 +0100
Subject: [PATCH] Add a hypopg_reset_index() SQL wrapper.

---
 hypopg--2.0.0dev.sql   |  5 +++++
 hypopg_index.c         | 11 +++++++++++
 include/hypopg_index.h |  1 +
 3 files changed, 17 insertions(+)

diff --git a/hypopg--2.0.0dev.sql b/hypopg--2.0.0dev.sql
index 946ad5b..b269ad3 100644
--- a/hypopg--2.0.0dev.sql
+++ b/hypopg--2.0.0dev.sql
@@ -8,6 +8,11 @@
 
 SET client_encoding = 'UTF8';
 
+CREATE FUNCTION hypopg_reset_index()
+    RETURNS void
+    LANGUAGE C VOLATILE COST 100
+AS '$libdir/hypopg', 'hypopg_reset_index';
+
 CREATE FUNCTION hypopg_reset()
     RETURNS void
     LANGUAGE C VOLATILE COST 100
diff --git a/hypopg_index.c b/hypopg_index.c
index a3e466c..2f99fbb 100644
--- a/hypopg_index.c
+++ b/hypopg_index.c
@@ -79,6 +79,7 @@ PG_FUNCTION_INFO_V1(hypopg_create_index);
 PG_FUNCTION_INFO_V1(hypopg_drop_index);
 PG_FUNCTION_INFO_V1(hypopg_relation_size);
 PG_FUNCTION_INFO_V1(hypopg_get_indexdef);
+PG_FUNCTION_INFO_V1(hypopg_reset_index);
 
 
 static void hypo_addIndex(hypoIndex *entry);
@@ -1338,6 +1339,16 @@ hypopg_get_indexdef(PG_FUNCTION_ARGS)
 	PG_RETURN_TEXT_P(cstring_to_text(buf.data));
 }
 
+/*
+ * SQL wrapper to remove all declared hypothetical indexes.
+ */
+Datum
+hypopg_reset_index(PG_FUNCTION_ARGS)
+{
+	hypo_index_reset();
+	PG_RETURN_VOID();
+}
+
 
 /* Simple function to set the indexname, dealing with max name length, and the
  * ending \0
diff --git a/include/hypopg_index.h b/include/hypopg_index.h
index 6209791..b2bb17b 100644
--- a/include/hypopg_index.h
+++ b/include/hypopg_index.h
@@ -112,6 +112,7 @@ Datum		hypopg_create_index(PG_FUNCTION_ARGS);
 Datum		hypopg_drop_index(PG_FUNCTION_ARGS);
 Datum		hypopg_relation_size(PG_FUNCTION_ARGS);
 Datum		hypopg_get_indexdef(PG_FUNCTION_ARGS);
+Datum		hypopg_reset_index(PG_FUNCTION_ARGS);
 
 extern explain_get_index_name_hook_type prev_explain_get_index_name_hook;
 const char *hypo_explain_get_index_name_hook(Oid indexId);