add missing index for token_accounts table (metaplex-foundation#243)

* add missing index for asset and token_accounts table

migration/src/lib.rs

@@ -45,6 +45,7 @@ mod m20240320_120101_add_mpl_core_info_items;
 mod m20240520_120101_add_mpl_core_external_plugins_columns;
 mod m20240718_161232_change_supply_columns_to_numeric;
 mod m20241119_060310_add_token_inscription_enum_variant;
+mod m20250213_053451_add_idx_token_accounts_owner;
 
 pub mod model;
 
@@ -99,6 +100,7 @@ impl MigratorTrait for Migrator {
             Box::new(m20240520_120101_add_mpl_core_external_plugins_columns::Migration),
             Box::new(m20240718_161232_change_supply_columns_to_numeric::Migration),
             Box::new(m20241119_060310_add_token_inscription_enum_variant::Migration),
+            Box::new(m20250213_053451_add_idx_token_accounts_owner::Migration),
         ]
     }
 }

migration/src/m20250213_053451_add_idx_token_accounts_owner.rs

@@ -0,0 +1,35 @@
+use super::model::table::TokenAccounts;
+use sea_orm::{ConnectionTrait, DatabaseBackend, Statement};
+use sea_orm_migration::prelude::*;
+
+#[derive(DeriveMigrationName)]
+pub struct Migration;
+
+#[async_trait::async_trait]
+impl MigrationTrait for Migration {
+    async fn up(&self, manager: &SchemaManager) -> Result<(), DbErr> {
+        let conn = manager.get_connection();
+
+        conn.execute(Statement::from_string(
+            DatabaseBackend::Postgres,
+            "CREATE INDEX CONCURRENTLY IF NOT EXISTS token_accounts_owner_idx ON token_accounts (owner);"
+                .to_string(),
+        ))
+        .await?;
+
+        Ok(())
+    }
+
+    async fn down(&self, manager: &SchemaManager) -> Result<(), DbErr> {
+        manager
+            .drop_index(
+                Index::drop()
+                    .name("token_accounts_owner_idx")
+                    .table(TokenAccounts::Table)
+                    .to_owned(),
+            )
+            .await?;
+
+        Ok(())
+    }
+}