From 4ec607bd375cddbec6d28bc1931eab7da221e4bb Mon Sep 17 00:00:00 2001
From: Google APIs <noreply@google.com>
Date: Wed, 9 Apr 2025 06:54:34 -0700
Subject: [PATCH] feat: new Firestore index modes and Database Editions

PiperOrigin-RevId: 745570206
---
 google/firestore/admin/v1/database.proto | 31 ++++++++++++++++
 google/firestore/admin/v1/index.proto    | 45 ++++++++++++++++++++++++
 2 files changed, 76 insertions(+)

diff --git a/google/firestore/admin/v1/database.proto b/google/firestore/admin/v1/database.proto
index 8161c65e8e..923b2169d3 100644
--- a/google/firestore/admin/v1/database.proto
+++ b/google/firestore/admin/v1/database.proto
@@ -227,6 +227,20 @@ message Database {
     }
   }
 
+  // The edition of the database.
+  enum DatabaseEdition {
+    // Not used.
+    DATABASE_EDITION_UNSPECIFIED = 0;
+
+    // Standard edition.
+    //
+    // This is the default setting if not specified.
+    STANDARD = 1;
+
+    // Enterprise edition.
+    ENTERPRISE = 2;
+  }
+
   // The resource name of the Database.
   // Format: `projects/{project}/databases/{database}`
   string name = 1;
@@ -314,8 +328,25 @@ message Database {
   // Output only. Information about the provenance of this database.
   SourceInfo source_info = 26 [(google.api.field_behavior) = OUTPUT_ONLY];
 
+  // Output only. Background: Free tier is the ability of a Firestore database
+  // to use a small amount of resources every day without being charged. Once
+  // usage exceeds the free tier limit further usage is charged.
+  //
+  // Whether this database can make use of the free tier. Only one database
+  // per project can be eligible for the free tier.
+  //
+  // The first (or next) database that is created in a project without a free
+  // tier database will be marked as eligible for the free tier. Databases that
+  // are created while there is a free tier database will not be eligible for
+  // the free tier.
+  optional bool free_tier = 30 [(google.api.field_behavior) = OUTPUT_ONLY];
+
   // This checksum is computed by the server based on the value of other
   // fields, and may be sent on update and delete requests to ensure the
   // client has an up-to-date value before proceeding.
   string etag = 99;
+
+  // Immutable. The edition of the database.
+  DatabaseEdition database_edition = 28
+      [(google.api.field_behavior) = IMMUTABLE];
 }
diff --git a/google/firestore/admin/v1/index.proto b/google/firestore/admin/v1/index.proto
index eddc2eec8b..5dd4dc9fb9 100644
--- a/google/firestore/admin/v1/index.proto
+++ b/google/firestore/admin/v1/index.proto
@@ -66,6 +66,9 @@ message Index {
 
     // The index can only be used by the Firestore in Datastore Mode query API.
     DATASTORE_MODE_API = 1;
+
+    // The index can only be used by the MONGODB_COMPATIBLE_API.
+    MONGODB_COMPATIBLE_API = 2;
   }
 
   // A field in an index.
@@ -162,6 +165,32 @@ message Index {
     NEEDS_REPAIR = 3;
   }
 
+  // The density configuration for the index.
+  enum Density {
+    // Unspecified. It will use database default setting. This value is input
+    // only.
+    DENSITY_UNSPECIFIED = 0;
+
+    // In order for an index entry to be added, the document must
+    // contain all fields specified in the index.
+    //
+    // This is the only allowed value for indexes having ApiScope `ANY_API` and
+    // `DATASTORE_MODE_API`.
+    SPARSE_ALL = 1;
+
+    // In order for an index entry to be added, the document must
+    // contain at least one of the fields specified in the index.
+    // Non-existent fields are treated as having a NULL value when generating
+    // index entries.
+    SPARSE_ANY = 2;
+
+    // An index entry will be added regardless of whether the
+    // document contains any of the fields specified in the index.
+    // Non-existent fields are treated as having a NULL value when generating
+    // index entries.
+    DENSE = 3;
+  }
+
   // Output only. A server defined name for this index.
   // The form of this name for composite indexes will be:
   // `projects/{project_id}/databases/{database_id}/collectionGroups/{collection_id}/indexes/{composite_index_id}`
@@ -195,4 +224,20 @@ message Index {
 
   // Output only. The serving state of the index.
   State state = 4;
+
+  // Immutable. The density configuration of the index.
+  Density density = 6 [(google.api.field_behavior) = IMMUTABLE];
+
+  // Optional. Whether the index is multikey. By default, the index is not
+  // multikey. For non-multikey indexes, none of the paths in the index
+  // definition reach or traverse an array, except via an explicit array index.
+  // For multikey indexes, at most one of the paths in the index definition
+  // reach or traverse an array, except via an explicit array index. Violations
+  // will result in errors.
+  //
+  // Note this field only applies to index with MONGODB_COMPATIBLE_API ApiScope.
+  bool multikey = 7 [(google.api.field_behavior) = OPTIONAL];
+
+  // Optional. The number of shards for the index.
+  int32 shard_count = 8 [(google.api.field_behavior) = OPTIONAL];
 }