diff --git a/generated/google-apis-retail_v2alpha/CHANGELOG.md b/generated/google-apis-retail_v2alpha/CHANGELOG.md
index e3eaf326f..67d0f6945 100644
--- a/generated/google-apis-retail_v2alpha/CHANGELOG.md
+++ b/generated/google-apis-retail_v2alpha/CHANGELOG.md
@@ -1,6 +1,8 @@
 # Release history for google-apis-retail_v2alpha
 
-### v0.1.0 (2021-01-10)
+### v0.1.0 (2021-01-20)
 
+* Regenerated from discovery document revision 20210119
+* Regenerated using generator version 0.1.2
 * Unspecified changes
 
diff --git a/generated/google-apis-retail_v2alpha/lib/google/apis/retail_v2alpha/classes.rb b/generated/google-apis-retail_v2alpha/lib/google/apis/retail_v2alpha/classes.rb
index acff895d0..2aead6d64 100644
--- a/generated/google-apis-retail_v2alpha/lib/google/apis/retail_v2alpha/classes.rb
+++ b/generated/google-apis-retail_v2alpha/lib/google/apis/retail_v2alpha/classes.rb
@@ -582,7 +582,7 @@ module Google
         end
       end
       
-      # A custom attribute that is not explicitly modeled in Product].
+      # A custom attribute that is not explicitly modeled in Product.
       class GoogleCloudRetailV2alphaCustomAttribute
         include Google::Apis::Core::Hashable
       
@@ -1212,10 +1212,11 @@ module Google
         # customer. Numerical features. Some examples would be the height/weight of a
         # product, or age of a customer. For example: `` "vendor": `"text": ["vendor123",
         # "vendor456"]`, "lengths_cm": `"numbers":[2.3, 15.4]`, "heights_cm": `"numbers"
-        # :[8.1, 6.4]` ``. A maximum of 150 attributes are allowed. Otherwise, an
-        # INVALID_ARGUMENT error is returned. The key must be a UTF-8 encoded string
-        # with a length limit of 5,000 characters. Otherwise, an INVALID_ARGUMENT error
-        # is returned.
+        # :[8.1, 6.4]` ``. This field needs to pass all below criteria, otherwise an
+        # INVALID_ARGUMENT error is returned: * Max entries count: 150 by default; 100
+        # for Type.VARIANT. * Max indexable entries count: 150 by default; 40 for Type.
+        # VARIANT. * Max searchable entries count: 30. * The key must be a UTF-8 encoded
+        # string with a length limit of 128 characters.
         # Corresponds to the JSON property `attributes`
         # @return [Hash<String,Google::Apis::RetailV2alpha::GoogleCloudRetailV2alphaCustomAttribute>]
         attr_accessor :attributes
@@ -1775,8 +1776,9 @@ module Google
       
         # The user's search query. The value must be a UTF-8 encoded string with a
         # length limit of 5,000 characters. Otherwise, an INVALID_ARGUMENT error is
-        # returned. Required for `search` events. Other event types should not set this
-        # field. Otherwise, an INVALID_ARGUMENT error is returned.
+        # returned. At least one of search_query or filter is required for `search`
+        # events. Other event types should not set this field. Otherwise, an
+        # INVALID_ARGUMENT error is returned.
         # Corresponds to the JSON property `searchQuery`
         # @return [String]
         attr_accessor :search_query
diff --git a/generated/google-apis-retail_v2alpha/lib/google/apis/retail_v2alpha/gem_version.rb b/generated/google-apis-retail_v2alpha/lib/google/apis/retail_v2alpha/gem_version.rb
index 6fd60cd8e..d7c852617 100644
--- a/generated/google-apis-retail_v2alpha/lib/google/apis/retail_v2alpha/gem_version.rb
+++ b/generated/google-apis-retail_v2alpha/lib/google/apis/retail_v2alpha/gem_version.rb
@@ -19,10 +19,10 @@ module Google
       GEM_VERSION = "0.1.0"
 
       # Version of the code generator used to generate this client
-      GENERATOR_VERSION = "0.1.1"
+      GENERATOR_VERSION = "0.1.2"
 
       # Revision of the discovery document this client was generated from
-      REVISION = "20210105"
+      REVISION = "20210119"
     end
   end
 end
diff --git a/generated/google-apis-retail_v2alpha/synth.metadata b/generated/google-apis-retail_v2alpha/synth.metadata
index d5ac68a6d..4f76ed89c 100644
--- a/generated/google-apis-retail_v2alpha/synth.metadata
+++ b/generated/google-apis-retail_v2alpha/synth.metadata
@@ -4,7 +4,7 @@
       "git": {
         "name": ".",
         "remote": "https://github.com/googleapis/google-api-ruby-client.git",
-        "sha": "a25c2c32c3337dafc1044a2f2e4d97db4b803c67"
+        "sha": "e2304ed6ab5a8a413487fe7df86c3b8f810c7d74"
       }
     }
   ]