diff --git a/sdk/costmanagement/azure-mgmt-costmanagement/_meta.json b/sdk/costmanagement/azure-mgmt-costmanagement/_meta.json
index 03051a9b4540..6937e270f45f 100644
--- a/sdk/costmanagement/azure-mgmt-costmanagement/_meta.json
+++ b/sdk/costmanagement/azure-mgmt-costmanagement/_meta.json
@@ -4,7 +4,7 @@
     "@autorest/python@5.8.0",
     "@autorest/modelerfour@4.19.2"
   ],
-  "commit": "67528b3e539b96ccaaf82c360f5715184e467e21",
+  "commit": "bde74ae977605c4b3439cef1f28eee5257536051",
   "repository_url": "https://github.com/Azure/azure-rest-api-specs",
   "autorest_command": "autorest specification/cost-management/resource-manager/readme.md --multiapi --python --python-mode=update --python-sdks-folder=/home/vsts/work/1/s/azure-sdk-for-python/sdk --track2 --use=@autorest/python@5.8.0 --use=@autorest/modelerfour@4.19.2 --version=3.4.2",
   "readme": "specification/cost-management/resource-manager/readme.md"
diff --git a/sdk/costmanagement/azure-mgmt-costmanagement/azure/mgmt/costmanagement/_version.py b/sdk/costmanagement/azure-mgmt-costmanagement/azure/mgmt/costmanagement/_version.py
index 48944bf3938a..e5754a47ce68 100644
--- a/sdk/costmanagement/azure-mgmt-costmanagement/azure/mgmt/costmanagement/_version.py
+++ b/sdk/costmanagement/azure-mgmt-costmanagement/azure/mgmt/costmanagement/_version.py
@@ -6,4 +6,4 @@
 # Changes may cause incorrect behavior and will be lost if the code is regenerated.
 # --------------------------------------------------------------------------
 
-VERSION = "2.0.0"
+VERSION = "1.0.0b1"
diff --git a/sdk/costmanagement/azure-mgmt-costmanagement/azure/mgmt/costmanagement/models/_cost_management_client_enums.py b/sdk/costmanagement/azure-mgmt-costmanagement/azure/mgmt/costmanagement/models/_cost_management_client_enums.py
index 16087446457c..eac0fd7748ff 100644
--- a/sdk/costmanagement/azure-mgmt-costmanagement/azure/mgmt/costmanagement/models/_cost_management_client_enums.py
+++ b/sdk/costmanagement/azure-mgmt-costmanagement/azure/mgmt/costmanagement/models/_cost_management_client_enums.py
@@ -185,6 +185,9 @@ class FunctionType(with_metaclass(_CaseInsensitiveEnumMeta, str, Enum)):
     """The name of the aggregation function to use.
     """
 
+    AVG = "Avg"
+    MAX = "Max"
+    MIN = "Min"
     SUM = "Sum"
 
 class GranularityType(with_metaclass(_CaseInsensitiveEnumMeta, str, Enum)):
diff --git a/sdk/costmanagement/azure-mgmt-costmanagement/azure/mgmt/costmanagement/models/_models.py b/sdk/costmanagement/azure-mgmt-costmanagement/azure/mgmt/costmanagement/models/_models.py
index 2c2ba531e35b..32a386f88133 100644
--- a/sdk/costmanagement/azure-mgmt-costmanagement/azure/mgmt/costmanagement/models/_models.py
+++ b/sdk/costmanagement/azure-mgmt-costmanagement/azure/mgmt/costmanagement/models/_models.py
@@ -1012,7 +1012,7 @@ class ForecastDefinition(msrest.serialization.Model):
     :type timeframe: str or ~azure.mgmt.costmanagement.models.ForecastTimeframeType
     :param time_period: Has time period for pulling data for the forecast.
     :type time_period: ~azure.mgmt.costmanagement.models.QueryTimePeriod
-    :param dataset: Has definition for data in this forecast.
+    :param dataset: Required. Has definition for data in this forecast.
     :type dataset: ~azure.mgmt.costmanagement.models.QueryDataset
     :param include_actual_cost: a boolean determining if actualCost will be included.
     :type include_actual_cost: bool
@@ -1023,6 +1023,7 @@ class ForecastDefinition(msrest.serialization.Model):
     _validation = {
         'type': {'required': True},
         'timeframe': {'required': True},
+        'dataset': {'required': True},
     }
 
     _attribute_map = {
@@ -1042,7 +1043,7 @@ def __init__(
         self.type = kwargs['type']
         self.timeframe = kwargs['timeframe']
         self.time_period = kwargs.get('time_period', None)
-        self.dataset = kwargs.get('dataset', None)
+        self.dataset = kwargs['dataset']
         self.include_actual_cost = kwargs.get('include_actual_cost', None)
         self.include_fresh_partial_cost = kwargs.get('include_fresh_partial_cost', None)
 
@@ -1267,7 +1268,7 @@ class QueryAggregation(msrest.serialization.Model):
     :param name: Required. The name of the column to aggregate.
     :type name: str
     :param function: Required. The name of the aggregation function to use. Possible values
-     include: "Sum".
+     include: "Avg", "Max", "Min", "Sum".
     :type function: str or ~azure.mgmt.costmanagement.models.FunctionType
     """
 
@@ -1469,13 +1470,14 @@ class QueryDefinition(msrest.serialization.Model):
     :type timeframe: str or ~azure.mgmt.costmanagement.models.TimeframeType
     :param time_period: Has time period for pulling data for the query.
     :type time_period: ~azure.mgmt.costmanagement.models.QueryTimePeriod
-    :param dataset: Has definition for data in this query.
+    :param dataset: Required. Has definition for data in this query.
     :type dataset: ~azure.mgmt.costmanagement.models.QueryDataset
     """
 
     _validation = {
         'type': {'required': True},
         'timeframe': {'required': True},
+        'dataset': {'required': True},
     }
 
     _attribute_map = {
@@ -1493,7 +1495,7 @@ def __init__(
         self.type = kwargs['type']
         self.timeframe = kwargs['timeframe']
         self.time_period = kwargs.get('time_period', None)
-        self.dataset = kwargs.get('dataset', None)
+        self.dataset = kwargs['dataset']
 
 
 class QueryFilter(msrest.serialization.Model):
@@ -1700,7 +1702,7 @@ class ReportConfigAggregation(msrest.serialization.Model):
     :param name: Required. The name of the column to aggregate.
     :type name: str
     :param function: Required. The name of the aggregation function to use. Possible values
-     include: "Sum".
+     include: "Avg", "Max", "Min", "Sum".
     :type function: str or ~azure.mgmt.costmanagement.models.FunctionType
     """
 
diff --git a/sdk/costmanagement/azure-mgmt-costmanagement/azure/mgmt/costmanagement/models/_models_py3.py b/sdk/costmanagement/azure-mgmt-costmanagement/azure/mgmt/costmanagement/models/_models_py3.py
index 699d4b63d817..4ad5f7bf172e 100644
--- a/sdk/costmanagement/azure-mgmt-costmanagement/azure/mgmt/costmanagement/models/_models_py3.py
+++ b/sdk/costmanagement/azure-mgmt-costmanagement/azure/mgmt/costmanagement/models/_models_py3.py
@@ -1117,7 +1117,7 @@ class ForecastDefinition(msrest.serialization.Model):
     :type timeframe: str or ~azure.mgmt.costmanagement.models.ForecastTimeframeType
     :param time_period: Has time period for pulling data for the forecast.
     :type time_period: ~azure.mgmt.costmanagement.models.QueryTimePeriod
-    :param dataset: Has definition for data in this forecast.
+    :param dataset: Required. Has definition for data in this forecast.
     :type dataset: ~azure.mgmt.costmanagement.models.QueryDataset
     :param include_actual_cost: a boolean determining if actualCost will be included.
     :type include_actual_cost: bool
@@ -1128,6 +1128,7 @@ class ForecastDefinition(msrest.serialization.Model):
     _validation = {
         'type': {'required': True},
         'timeframe': {'required': True},
+        'dataset': {'required': True},
     }
 
     _attribute_map = {
@@ -1144,8 +1145,8 @@ def __init__(
         *,
         type: Union[str, "ForecastType"],
         timeframe: Union[str, "ForecastTimeframeType"],
+        dataset: "QueryDataset",
         time_period: Optional["QueryTimePeriod"] = None,
-        dataset: Optional["QueryDataset"] = None,
         include_actual_cost: Optional[bool] = None,
         include_fresh_partial_cost: Optional[bool] = None,
         **kwargs
@@ -1392,7 +1393,7 @@ class QueryAggregation(msrest.serialization.Model):
     :param name: Required. The name of the column to aggregate.
     :type name: str
     :param function: Required. The name of the aggregation function to use. Possible values
-     include: "Sum".
+     include: "Avg", "Max", "Min", "Sum".
     :type function: str or ~azure.mgmt.costmanagement.models.FunctionType
     """
 
@@ -1618,13 +1619,14 @@ class QueryDefinition(msrest.serialization.Model):
     :type timeframe: str or ~azure.mgmt.costmanagement.models.TimeframeType
     :param time_period: Has time period for pulling data for the query.
     :type time_period: ~azure.mgmt.costmanagement.models.QueryTimePeriod
-    :param dataset: Has definition for data in this query.
+    :param dataset: Required. Has definition for data in this query.
     :type dataset: ~azure.mgmt.costmanagement.models.QueryDataset
     """
 
     _validation = {
         'type': {'required': True},
         'timeframe': {'required': True},
+        'dataset': {'required': True},
     }
 
     _attribute_map = {
@@ -1639,8 +1641,8 @@ def __init__(
         *,
         type: Union[str, "ExportType"],
         timeframe: Union[str, "TimeframeType"],
+        dataset: "QueryDataset",
         time_period: Optional["QueryTimePeriod"] = None,
-        dataset: Optional["QueryDataset"] = None,
         **kwargs
     ):
         super(QueryDefinition, self).__init__(**kwargs)
@@ -1875,7 +1877,7 @@ class ReportConfigAggregation(msrest.serialization.Model):
     :param name: Required. The name of the column to aggregate.
     :type name: str
     :param function: Required. The name of the aggregation function to use. Possible values
-     include: "Sum".
+     include: "Avg", "Max", "Min", "Sum".
     :type function: str or ~azure.mgmt.costmanagement.models.FunctionType
     """