From 0f6970aefd151984196b33ec643a48ed0d193f32 Mon Sep 17 00:00:00 2001
From: Jack Grigg <jack@electriccoin.co>
Date: Tue, 25 Jul 2023 13:46:44 +0000
Subject: [PATCH] zcash_client_sqlite: Cache statement for
 `wallet::prune_nullifier_map`

---
 zcash_client_sqlite/src/wallet.rs | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/zcash_client_sqlite/src/wallet.rs b/zcash_client_sqlite/src/wallet.rs
index 23704cdd3..c7fb373c7 100644
--- a/zcash_client_sqlite/src/wallet.rs
+++ b/zcash_client_sqlite/src/wallet.rs
@@ -1474,12 +1474,13 @@ pub(crate) fn prune_nullifier_map(
     conn: &rusqlite::Transaction<'_>,
     block_height: BlockHeight,
 ) -> Result<(), SqliteClientError> {
-    conn.execute(
+    let mut stmt_delete_locators = conn.prepare_cached(
         "DELETE FROM tx_locator_map
         WHERE block_height < :block_height",
-        named_params![":block_height": u32::from(block_height)],
     )?;
 
+    stmt_delete_locators.execute(named_params![":block_height": u32::from(block_height)])?;
+
     Ok(())
 }