crc: add index to nakamoto_staging_blocks

Author: hstove

stackslib/src/chainstate/nakamoto/staging_blocks.rs

@@ -165,7 +165,12 @@ pub const NAKAMOTO_STAGING_DB_SCHEMA_4: &[&str] = &[
     r#"UPDATE db_version SET version = 4"#,
 ];
 
-pub const NAKAMOTO_STAGING_DB_SCHEMA_LATEST: u32 = 4;
+pub const NAKAMOTO_STAGING_DB_SCHEMA_5: &[&str] = &[
+    r#"CREATE INDEX nakamoto_staging_blocks_by_consensus_hash_and_processed ON nakamoto_staging_blocks(consensus_hash, processed);"#,
+    r#"UPDATE db_version SET version = 5"#,
+];
+
+pub const NAKAMOTO_STAGING_DB_SCHEMA_LATEST: u32 = 5;
 
 pub struct NakamotoStagingBlocksConn(rusqlite::Connection);
 
@@ -834,6 +839,15 @@ impl StacksChainState {
                     assert_eq!(version, 4, "Nakamoto staging DB migration failure");
                     debug!("Migrated Nakamoto staging blocks DB to schema 3");
                 }
+                4 => {
+                    debug!("Migrate Nakamoto staging blocks DB to schema 5");
+                    for cmd in NAKAMOTO_STAGING_DB_SCHEMA_5.iter() {
+                        conn.execute(cmd, NO_PARAMS)?;
+                    }
+                    let version = Self::get_nakamoto_staging_blocks_db_version(conn)?;
+                    assert_eq!(version, 5, "Nakamoto staging DB migration failure");
+                    debug!("Migrated Nakamoto staging blocks DB to schema 5");
+                }
                 NAKAMOTO_STAGING_DB_SCHEMA_LATEST => {
                     break;
                 }