SQL Data Warehouse

Do you have an idea or suggestion based on your experience with SQL Data Warehouse? We would love to hear it! Please take a few minutes to submit your idea or vote up an idea submitted by another SQL Data Warehouse customer. All of the feedback you share in these forums will be monitored and reviewed by the SQL Data Warehouse engineering team. By suggesting or voting for ideas here, you will also be one of the first to know when we begin work on your feature requests and when we release the feature.

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How can we improve Microsoft Azure SQL Data Warehouse ?

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  1. Rename a column name in SQLDW

    Scenario: We want to change the column name as it is changed in the source. And in table where we are trying to do has more than 20Billion records.
    Workaround: Since rename of column is not possible currently in SQL DW we are doing CTAS of that big table.
    Issues With Work around: It is very slow because we can’t do CTAS on entire big table in single transaction because of transaction limits and we end up doing in CTAS and with multiple insert statements . Which is very time consuming process
    ASK: Please support column Rename

    3 votes
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      0 comments  ·  T-SQL  ·  Flag idea as inappropriate…  ·  Admin →
    • Polybase: Remove/increase row size from 32k

      Polybase is currently limited to a maximum row size of 32k. Request that this be increased by orders of magnitude.

      1 vote
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        0 comments  ·  Polybase  ·  Flag idea as inappropriate…  ·  Admin →
      • APS: Improve on control node bottleneck for data return rate

        With AU4 it was claimed that the data return rate for APS should improve for select * queries

        The real world improvements do not seem to exist from this feature and the control node seems to still be a big bottleneck for this kind of task being saturated with 100% CPU Load.

        The scenario in which we need this is when processing a large cube with plenty of large partitions being processed in parallel.

        Compare my screenshot for figures from our environment.

        Specs:
        APS HP Half rack (Patch: v10.0.8026.0)
        40 core E7-8891 v2 512GB RAM + 12TB FusionIO SSAS only…

        8 votes
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          1 comment  ·  Performance  ·  Flag idea as inappropriate…  ·  Admin →
        • SSMS support for APS/PDW

          I understand SSMS supports Azure DW, that should make it even easier to add the support for APS/PDW in SSMS.

          3 votes
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            0 comments  ·  Other  ·  Flag idea as inappropriate…  ·  Admin →
          • Predicate pushdown for ADLS sources

            As Azure SQL DW now also supports ADLS, it would be great if we could also leverage the distributed processing capabilities of ADLS to push computation down to ADLS in a similar way as it works for HDFS/Hadoop already

            1 vote
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              0 comments  ·  Polybase  ·  Flag idea as inappropriate…  ·  Admin →
            • Automatic Generation and Updating of table statistic

              It would be great if table statistics were automatically created and updated in Azure Data Warehouse.

              1 vote
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                0 comments  ·  Management  ·  Flag idea as inappropriate…  ·  Admin →
              • Allow install of Linux ODBC to be automated via puppet

                Allow install of Linux ODBC to be automated via puppet. The current Microsoft SQL Server ODBC packages can't be installed via puppet as they require EULA acknowledgment. If we adopted the ADW technology, we would inevitably have to install the ODBC software on several grids of computers that host our various ETL software. Puppet installation allows the implementers of new systems to get the software automatically installed without the DBA team's intervention.

                2 votes
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                  2 comments  ·  Management  ·  Flag idea as inappropriate…  ·  Admin →
                • allow polybase export

                  support

                  EXEC sp_configure 'allow polybase export', '1';

                  1 vote
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                    0 comments  ·  Polybase  ·  Flag idea as inappropriate…  ·  Admin →
                  • Polybase to treat \N as NULL

                    I was trying to load external file into SQL DW table using polybase. This external file has \N as value for null columns. For example :

                    2,"C1008",1,\N,1,1,"2016-02-09 23:13:02","2014-02-21 20:11:36","2016-02-08 17:48:59","2008-07-16 14:17:40",947

                    I defined external data format as below:

                    CREATE EXTERNAL FILE FORMAT TextFileFormat
                    WITH
                    ( FORMAT_TYPE = DELIMITEDTEXT
                    , FORMAT_OPTIONS ( FIELD_TERMINATOR = ','
                    , STRING_DELIMITER = ''
                    , USE_TYPE_DEFAULT = FALSE
                    )
                    );

                    when i try to load this record into DW table, I am getting below error:

                    Query aborted-- the maximum reject threshold (0 rows) was reached while reading from an external source: 1 rows rejected out of…

                    2 votes
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                      0 comments  ·  Polybase  ·  Flag idea as inappropriate…  ·  Admin →
                    • Cancel Query in sqlcmd

                      Need to be able to cancel a query running from sqlcmd (on Linux) without terminating the session as KILL 'SIDxxxxx' does

                      1 vote
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                        0 comments  ·  Management  ·  Flag idea as inappropriate…  ·  Admin →
                      • Support Always encrypted in SQL Data warehouse

                        Always Encrypted makes the data to be only available to client side applications and not visible to Database administrators also. It makes the data to be more secure. It is especially needed in the case of Azure, where PII data is stored in cloud.

                        2 votes
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                          0 comments  ·  Security  ·  Flag idea as inappropriate…  ·  Admin →
                        • Pause Resume Azure SQL Data Warehouse Using SQL Command

                          It would be great if we can have SQL command to Pause/Resume DB instance like how we do for Scale up/down (under Master DB). This will help us to manage the same from ADF and don't have to worry about trigger REST API or PowerShell

                          3 votes
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                            0 comments  ·  Management  ·  Flag idea as inappropriate…  ·  Admin →
                          • Using APS PDW on-prem. Not having Primary Key Constraints is a big issue.

                            I've had to create an audit process using a control table that holds the primary key columns for all the tables and a procedure that spins through all the tables looking for duplicate counts based off those keys. After 2 years of adding tables with no validation for this, the first time I ran the audit 6 months ago, it found duplication in more than 10-20% of our tables. We're still cleaning up our legacy ETL feeds and removing duplicates. Looking for and cleaning up duplicates after they hit the system is very inefficient.

                            6 votes
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                              0 comments  ·  Flag idea as inappropriate…  ·  Admin →
                            • Allow results of a Stored procedure call to be stored to a table.

                              APS PDW on-Prem... I'm having to create a permanent table with session Id as part of the key to be able to pass record sets back and forth between stored procedure calls. I'd like to at least be able to declare a table variable, and populate it with the results of a stored procedure call.

                              2 votes
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                                0 comments  ·  T-SQL  ·  Flag idea as inappropriate…  ·  Admin →
                              • For APS PDW, add abiltiy to name indexes within the create table script and from visual studio script the indexes with thier names.

                                We have a naming standard for our indexes but since we can't script the name of the index in a create table command, we have to use a separate create index command. This is a bit of a hassle when moving objects around. Viewing the code of a table in Visual Studio does not include the index names so when we use this function we have to manually change the script it generates.

                                3 votes
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                                  0 comments  ·  Management  ·  Flag idea as inappropriate…  ·  Admin →
                                • SET TRANSACTION ISOLATION LEVEL

                                  Supporting "READ COMMITTED"

                                  4 votes
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                                    1 comment  ·  T-SQL  ·  Flag idea as inappropriate…  ·  Admin →
                                  • Expand size of LABEL in query logs

                                    The LABEL column in the sys.dm_pdw_exec_requests DMV is limited to 255 characters.

                                    This field needs to be much larger to store rich metadata/context of some queries.

                                    1 vote
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                                      0 comments  ·  Management  ·  Flag idea as inappropriate…  ·  Admin →
                                    • Enable AD authentication for Polybase

                                      Currently SAS is the only option for Polybase to access blob storage or datawarehouse.

                                      4 votes
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                                        0 comments  ·  Polybase  ·  Flag idea as inappropriate…  ·  Admin →
                                      • Add support for synonyms

                                        CTAS to a new table is often a pattern that's used in DW for data processing workloads. Instead of RENAME OBJECT operations from old tables to the new ones using CTAS, it would be great if we can add synonym support to DW, so that switching to the new table is an atomic operation, and is reliable.

                                        5 votes
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                                          1 comment  ·  Other  ·  Flag idea as inappropriate…  ·  Admin →
                                        • Support Global Temporary Tables

                                          Allow the DDL to be specified once for a temporary table and then let applications instantiate an instance of the table in their sessions when the object is referenced (with an INSERT statement) if not already created in the session.

                                          1 vote
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                                            0 comments  ·  Table Structure  ·  Flag idea as inappropriate…  ·  Admin →
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