WLM updates for preview version

Author: julieMSFT

docs/relational-databases/system-catalog-views/sql-data-warehouse-and-parallel-data-warehouse-catalog-views.md

@@ -58,6 +58,9 @@ monikerRange: ">= aps-pdw-2016 || = azure-sqldw-latest || = sqlallproducts-allve
 [sys.workload_management_workload_classifier_details (Transact-SQL)](../../relational-databases/system-catalog-views/sys-workload-management-workload-classifier-details-transact-sql.md) (Preview)
 
 [sys.workload_management_workload_classifiers (Transact-SQL)](../../relational-databases/system-catalog-views/sys-workload-management-workload-classifiers-transact-sql.md) (Preview)
+
+> [!Note]
+> Workload classification is available for preview on SQL Data Warehouse Gen2. Workload Management Classification and Importance preview is for builds with a release date of April 9th, 2019 or later.  Users should avoid using builds earlier than this date for workload management testing.  To determine if your build is workload management capable, run select @@version when connected to your SQL Data Warehouse instance.
  
 ## [!INCLUDE[ssPDW](../../includes/sspdw-md.md)] Catalog Views  
  The following catalog views apply to [!INCLUDE[ssPDW](../../includes/sspdw-md.md)] only:

docs/relational-databases/system-catalog-views/sys-workload-management-workload-classifier-details-transact-sql.md

@@ -17,6 +17,9 @@ monikerRange: "=azure-sqldw-latest||=sqlallproducts-allversions"
 
 [!INCLUDE[tsql-appliesto-xxxxxx-xxxx-asdw-xxx-md](../../includes/tsql-appliesto-xxxxxx-xxxx-asdw-xxx-md.md)]
 
+> [!Note]
+> Workload classification is available for preview on SQL Data Warehouse Gen2. Workload Management Classification and Importance preview is for builds with a release date of April 9th, 2019 or later.  Users should avoid using builds earlier than this date for workload management testing.  To determine if your build is workload management capable, run select @@version when connected to your SQL Data Warehouse instance.
+
   Returns details for each classifier.  
 
 |Column Name|Data Type|Description|Range|  

docs/relational-databases/system-catalog-views/sys-workload-management-workload-classifiers-transact-sql.md

@@ -17,6 +17,9 @@ monikerRange: "=azure-sqldw-latest||=sqlallproducts-allversions"
 
 [!INCLUDE[tsql-appliesto-xxxxxx-xxxx-asdw-xxx-md](../../includes/tsql-appliesto-xxxxxx-xxxx-asdw-xxx-md.md)]
 
+> [!Note]
+> Workload classification is available for preview on SQL Data Warehouse Gen2. Workload Management Classification and Importance preview is for builds with a release date of April 9th, 2019 or later.  Users should avoid using builds earlier than this date for workload management testing.  To determine if your build is workload management capable, run select @@version when connected to your SQL Data Warehouse instance.
+
  Returns details for workload classifiers.  
 
 |Column Name|Data Type|Description|Range|  

docs/relational-databases/system-dynamic-management-views/sys-dm-pdw-exec-requests-transact-sql.md

@@ -35,7 +35,7 @@ monikerRange: ">= aps-pdw-2016 || = azure-sqldw-latest || = sqlallproducts-allve
 |database_id|**int**|Identifier of database used by explicit context (for example, USE DB_X).|See ID in [sys.databases (Transact-SQL)](../../relational-databases/system-catalog-views/sys-databases-transact-sql.md).|  
 |command|**nvarchar(4000)**|Holds the full text of the request as submitted by the user.|Any valid query or request text. Queries that are longer than 4000 bytes are truncated.|  
 |resource_class|**nvarchar(20)**|The resource class for this request. See related **concurrency_slots_used** in [sys.dm_pdw_resource_waits &#40;Transact-SQL&#41;](../../relational-databases/system-dynamic-management-views/sys-dm-pdw-resource-waits-transact-sql.md).  For more information on resource classes, see [Resource classes & workload management](https://docs.microsoft.com/azure/sql-data-warehouse/resource-classes-for-workload-management) |Static Resource Classes</br>staticrc10</br>staticrc20</br>staticrc30</br>staticrc40</br>staticrc50</br>staticrc60</br>staticrc70</br>staticrc80</br>            </br>Dynamic Resource Classes</br>SmallRC</br>MediumRC</br>LargeRC</br>XLargeRC|
-|importance (Preview for SQL DW Gen2)|**nvarchar(32)**|The importance setting the request was submitted with. Requests with a lower importance will remain queued in suspended state, if higher importance requests are submitted.  Requests with higher importance will execute before lower importance requests that were submitted earlier.  For more information on importance, see [Workload Importance](https://docs.microsoft.com/azure/sql-data-warehouse/sql-data-warehouse-workload-importance).  |NULL</br>low</br>below_normal</br>normal (default)</br>above_normal</br>high|
+|importance (Workload classification is available for preview on SQL Data Warehouse Gen2. Workload Management Classification and Importance preview is for builds with a release date of April 9th, 2019 or later.  Users should avoid using builds earlier than this date for workload management testing.  To determine if your build is workload management capable, run select @@version when connected to your SQL Data Warehouse instance.)|**nvarchar(32)**|The importance setting the request was submitted with. Requests with a lower importance will remain queued in suspended state, if higher importance requests are submitted.  Requests with higher importance will execute before lower importance requests that were submitted earlier.  For more information on importance, see [Workload Importance](https://docs.microsoft.com/azure/sql-data-warehouse/sql-data-warehouse-workload-importance).  |NULL</br>low</br>below_normal</br>normal (default)</br>above_normal</br>high|
 
  For information about the maximum rows retained by this view, see the Metadata section in the [Capacity limits](/azure/sql-data-warehouse/sql-data-warehouse-service-capacity-limits#metadata) topic.   
 

docs/t-sql/statements/create-workload-classifier-transact-sql.md

@@ -24,6 +24,9 @@ monikerRange: "=azure-sqldw-latest||=sqlallproducts-allversions"
 ---
 # CREATE WORKLOAD CLASSIFIER (Transact-SQL) (Preview)
 
+> [!Note]
+> Workload classification is available for preview on SQL Data Warehouse Gen2. Workload Management Classification and Importance preview is for builds with a release date of April 9th, 2019 or later.  Users should avoid using builds earlier than this date for workload management testing.  To determine if your build is workload management capable, run select @@version when connected to your SQL Data Warehouse instance.
+
 [!INCLUDE[tsql-appliesto-xxxxxx-xxxx-asdw-xxx-md](../../includes/tsql-appliesto-xxxxxx-xxxx-asdw-xxx-md.md)]
 
 Creates a Workload Management Classifier.  The classifier assigns incoming requests to a workload group and assigns importance based on the parameters specified in the classifier statement definition.  Classifiers are evaluated with every request submitted.  If a request is not matched to a classifier, it is assigned to the default workload group.  The default workload group is the smallrc resource class.  

docs/t-sql/statements/drop-workload-classifier-transact-sql.md

@@ -24,6 +24,9 @@ monikerRange: "=azure-sqldw-latest||=sqlallproducts-allversions"
 ---
 # DROP WORKLOAD CLASSIFIER (Transact-SQL) (Preview)
 
+> [!Note]
+> Workload classification is available for preview on SQL Data Warehouse Gen2. Workload Management Classification and Importance preview is for builds with a release date of April 9th, 2019 or later.  Users should avoid using builds earlier than this date for workload management testing.  To determine if your build is workload management capable, run select @@version when connected to your SQL Data Warehouse instance.
+
 [!INCLUDE[tsql-appliesto-xxxxxx-xxxx-asdw-xxx-md](../../includes/tsql-appliesto-xxxxxx-xxxx-asdw-xxx-md.md)]
 
 Drops an existing user-defined Workload Management Classifier.