Unsupported functionality in Babelfish - Amazon Aurora
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Unsupported functionality in Babelfish

In the following table and lists, you can find functionality that isn't currently supported in Babelfish. Updates to Babelfish are included in Aurora PostgreSQL versions. For more information, see the Release Notes for Aurora PostgreSQL.

Functionality that isn't currently supported

In the table you can find information about certain functionality that isn't currently supported.

Functionality or syntax Description

Assembly modules and SQL Common Language Runtime (CLR) routines

Functionality related to assembly modules and CLR routines isn't supported.

Column attributes

ROWGUIDCOL, SPARSE, FILESTREAM, and MASKED aren't supported.

Contained databases

Contained databases with logins authenticated at the database level rather than at the server level aren't supported.

Cursors (updatable)

Updatable cursors aren't supported.

Cursors (global)

GLOBAL cursors aren't supported.

Cursor (fetch behaviors)

The following cursor fetch behaviors aren't supported: FETCH PRIOR, FIRST, LAST, ABSOLUTE, abd RELATIVE

Cursor-typed output parameters

Cursor-typed variables and parameters aren't supported for output parameters (an error is raised).

Cursor options

SCROLL, KEYSET, DYNAMIC, FAST_FORWARD, SCROLL_LOCKS, OPTIMISTIC, TYPE_WARNING, and FOR UPDATE

Data encryption

Data encryption isn't supported.

Data-tier applications (DAC)

Data-tier applications (DAC) import or export operations with DAC package (.dacpac) or DAC backup (.bacpac) files aren't supported.

DBCC commands

Microsoft SQL Server Database Console Commands (DBCC) aren't supported. DBCC CHECKIDENT is supported in Babelfish 3.4.0 and higher releases.

DROP IF EXISTS

This syntax isn't supported for USER and SCHEMA objects. It's supported for the objects TABLE, VIEW, PROCEDURE, FUNCTION, and DATABASE.

Encryption

Built-in functions and statements don't support encryption.

ENCRYPT_CLIENT_CERT connections

Client certificate connections aren't supported.

EXECUTE AS statement

This statement isn't supported.

EXECUTE AS SELF clause

This clause isn't supported in functions, procedures, or triggers.

EXECUTE AS USER clause

This clause isn't supported in functions, procedures, or triggers.

Foreign key constraints referencing database name

Foreign key constraints that reference the database name aren't supported.

FORMAT

User-defined types aren't supported.

Function declarations with greater than 100 parameters

Function declarations that contain more than 100 parameters aren't supported.

Function calls that include DEFAULT as a parameter value

DEFAULT isn't a supported parameter value for a function call. DEFAULT as a parameter value for a function call is supported from Babelfish 3.4.0 and higher releases.

Functions, externally defined

External functions, including SQL CLR functions, aren't supported.

Global temporary tables (tables with names that start with ##)

Global temporary tables aren't supported.

Graph functionality

All SQL graph functionality isn't supported.

Identifiers (variables or parameters) with multiple leading @ characters

Identifiers that start with more than one leading @ aren't supported.

Identifiers, table or column names that contain @ or ]] characters

Table or column names that contain an @ sign or square brackets aren't supported.

Inline indexes

Inline indexes aren't supported.

Invoking a procedure whose name is in a variable

Using a variable as a procedure name isn't supported.

Materialized views

Materialized views aren't supported.

NOT FOR REPLICATION clause

This syntax is accepted and ignored.

ODBC escape functions

ODBC escape functions aren't supported.

Partitioning

Table and index partitioning isn't supported.

Procedure calls that includes DEFAULT as a parameter value

DEFAULT isn't a supported parameter value. DEFAULT as a parameter value for a function call is supported from Babelfish 3.4.0 and higher releases.

Procedure declarations with more than 100 parameters

Declarations with more than 100 parameters aren't supported.

Procedures, externally defined

Externally defined procedures, including SQL CLR procedures, aren't supported.

Procedure versioning

Procedure versioning isn't supported.

Procedures WITH RECOMPILE

WITH RECOMPILE (when used in conjunction with the DECLARE and EXECUTE statements) isn't supported.

Remote object references

Executing procedures and functions using four-part names aren't supported. In remote objects, supports four-part object names for selected queries. For more information, see DB cluster parameter group settings for Babelfish.

Row-level security

Row-level security with CREATE SECURITY POLICY and inline table-valued functions isn't supported.

Service broker functionality

Service broker functionality isn't supported.

SESSIONPROPERTY

Unsupported properties: ANSI_NULLS, ANSI_PADDING, ANSI_WARNINGS, ARITHABORT, CONCAT_NULL_YIELDS_NULL, and NUMERIC_ROUNDABORT

SET LANGUAGE

This syntax isn't supported with any value other than english or us_english.

SP_CONFIGURE

This system stored procedure isn't supported.

SQL keyword SPARSE

The keyword SPARSE is accepted and ignored.

Table value constructor syntax (FROM clause)

The unsupported syntax is for a derived table constructed with the FROM clause.

Temporal tables

Temporal tables aren't supported.

Temporary procedures aren't dropped automatically

This functionality isn't supported.

Triggers, externally defined

These triggers aren't supported, including SQL Common Language Runtime (CLR).

Unquoted string values in stored procedure calls and default values

String parameters to stored procedure calls, and defaults for string parameters in CREATE PROCEDURE, aren't supported.

Without SCHEMABINDING clause

Creating a view without SCHEMABINDING isn't supported, but the view is created as if WITH SCHEMABINDING was specified. Using SCHEMABINDING when creating functions, procedures, triggers is silently ignored.

Settings that aren't supported

The following settings aren't supported:

  • SET ANSI_NULL_DFLT_OFF ON

  • SET ANSI_NULL_DFLT_ON OFF

  • SET ANSI_PADDING OFF

  • SET ANSI_WARNINGS OFF

  • SET ARITHABORT OFF

  • SET ARITHIGNORE ON

  • SET CURSOR_CLOSE_ON_COMMIT ON

  • SET NUMERIC_ROUNDABORT ON

  • SET PARSEONLY ON (command doesn't work as expected)

  • SET FMTONLY ON (command doesn't work as expected. It suppresses only the execution of SELECT statements but not others.)

Commands that aren't supported

Certain functionality for the following commands isn't supported:

  • ADD SIGNATURE

  • ALTER DATABASE, ALTER DATABASE SET

  • BACKUP/RESTORE DATABASE/LOG

  • BACPAC and DACPAC FILES RESTORE

  • CREATE, ALTER, DROP AUTHORIZATION. ALTER AUTHORIZATION is supported for database objects.

  • CREATE, ALTER, DROP AVAILABILITY GROUP

  • CREATE, ALTER, DROP BROKER PRIORITY

  • CREATE, ALTER, DROP COLUMN ENCRYPTION KEY

  • CREATE, ALTER, DROP DATABASE ENCRYPTION KEY

  • CREATE, ALTER, DROP, BACKUP CERTIFICATE

  • CREATE AGGREGATE

  • CREATE CONTRACT

  • CHECKPOINT

Column names or attributes that aren't supported

The following column names aren't supported:

  • $IDENTITY

  • $ROWGUID

  • IDENTITYCOL

Data types that aren't supported

The following data types aren't supported:

  • Geospatial (GEOGRAPHY and GEOMETRY)

  • HIERARCHYID

Object types that aren't supported

The following object types aren't supported:

  • COLUMN MASTER KEY

  • CREATE, ALTER EXTERNAL DATA SOURCE

  • CREATE, ALTER, DROP DATABASE AUDIT SPECIFICATION

  • CREATE, ALTER, DROP EXTERNAL LIBRARY

  • CREATE, ALTER, DROP SERVER AUDIT

  • CREATE, ALTER, DROP SERVER AUDIT SPECIFICATION

  • CREATE, ALTER, DROP, OPEN/CLOSE SYMMETRIC KEY

  • CREATE, DROP DEFAULT

  • CREDENTIAL

  • CRYPTOGRAPHIC PROVIDER

  • DIAGNOSTIC SESSION

  • Indexed views

  • SERVICE MASTER KEY

  • SYNONYM

Functions that aren't supported

The following built-in functions aren't supported:

Aggregate functions
  • APPROX_COUNT_DISTINCT

  • CHECKSUM_AGG

  • GROUPING_ID

  • STRING_AGG using the WITHIN GROUP clause

Cryptographic functions
  • CERTENCODED function

  • CERTID function

  • CERTPROPERTY function

Metadata functions
  • COLUMNPROPERTY

  • TYPEPROPERTY

  • SERVERPROPERTY function – The following properties aren't supported:

    • BuildClrVersion

    • ComparisonStyle

    • ComputerNamePhysicalNetBIOS

    • HadrManagerStatus

    • InstanceDefaultDataPath

    • InstanceDefaultLogPath

    • IsClustered

    • IsHadrEnabled

    • LCID

    • NumLicenses

    • ProcessID

    • ProductBuild

    • ProductBuildType

    • ProductUpdateReference

    • ResourceLastUpdateDateTime

    • ResourceVersion

    • ServerName

    • SqlCharSet

    • SqlCharSetName

    • SqlSortOrder

    • SqlSortOrderName

    • FilestreamShareName

    • FilestreamConfiguredLevel

    • FilestreamEffectiveLevel

Security functions
  • CERTPRIVATEKEY

  • LOGINPROPERTY

Statements, operators, other functions
  • EVENTDATA function

  • GET_TRANSMISSION_STATUS

  • OPENXML

Syntax that isn't supported

The following syntax isn't supported:

  • ALTER DATABASE

  • ALTER DATABASE SCOPED CONFIGURATION

  • ALTER DATABASE SCOPED CREDENTIAL

  • ALTER DATABASE SET HADR

  • ALTER FUNCTION

  • ALTER INDEX

  • ALTER PROCEDURE statement

  • ALTER SCHEMA

  • ALTER SERVER CONFIGURATION

  • ALTER SERVICE, BACKUP/RESTORE SERVICE MASTER KEY clause

  • ALTER VIEW

  • BEGIN CONVERSATION TIMER

  • BEGIN DISTRIBUTED TRANSACTION

  • BEGIN DIALOG CONVERSATION

  • BULK INSERT

  • CREATE COLUMNSTORE INDEX

  • CREATE EXTERNAL FILE FORMAT

  • CREATE EXTERNAL TABLE

  • CREATE, ALTER, DROP APPLICATION ROLE

  • CREATE, ALTER, DROP ASSEMBLY

  • CREATE, ALTER, DROP ASYMMETRIC KEY

  • CREATE, ALTER, DROP CREDENTIAL

  • CREATE, ALTER, DROP CRYPTOGRAPHIC PROVIDER

  • CREATE, ALTER, DROP ENDPOINT

  • CREATE, ALTER, DROP EVENT SESSION

  • CREATE, ALTER, DROP EXTERNAL LANGUAGE

  • CREATE, ALTER, DROP EXTERNAL RESOURCE POOL

  • CREATE, ALTER, DROP FULLTEXT CATALOG

  • CREATE, ALTER, DROP FULLTEXT INDEX

  • CREATE, ALTER, DROP FULLTEXT STOPLIST

  • CREATE, ALTER, DROP MESSAGE TYPE

  • CREATE, ALTER, DROP, OPEN/CLOSE, BACKUP/RESTORE MASTER KEY

  • CREATE, ALTER, DROP PARTITION FUNCTION

  • CREATE, ALTER, DROP PARTITION SCHEME

  • CREATE, ALTER, DROP QUEUE

  • CREATE, ALTER, DROP RESOURCE GOVERNOR

  • CREATE, ALTER, DROP RESOURCE POOL

  • CREATE, ALTER, DROP ROUTE

  • CREATE, ALTER, DROP SEARCH PROPERTY LIST

  • CREATE, ALTER, DROP SECURITY POLICY

  • CREATE, ALTER, DROP SELECTIVE XML INDEX clause

  • CREATE, ALTER, DROP SERVICE

  • CREATE, ALTER, DROP SPATIAL INDEX

  • CREATE, ALTER, DROP TYPE

  • CREATE, ALTER, DROP XML INDEX

  • CREATE, ALTER, DROP XML SCHEMA COLLECTION

  • CREATE/DROP RULE

  • CREATE, DROP WORKLOAD CLASSIFIER

  • CREATE, ALTER, DROP WORKLOAD GROUP

  • ALTER TRIGGER

  • CREATE TABLE... GRANT clause

  • CREATE TABLE... IDENTITY clause

  • CREATE USER – This syntax isn't supported. The PostgreSQL statement CREATE USER doesn't create a user that is equivalent to the SQL Server CREATE USER syntax. For more information, see T-SQL differences in Babelfish.

  • DENY

  • END, MOVE CONVERSATION

  • EXECUTE with AS LOGIN or AT option

  • GET CONVERSATION GROUP

  • GROUP BY ALL clause

  • GROUP BY CUBE clause

  • GROUP BY ROLLUP clause

  • INSERT... DEFAULT VALUES

  • MERGE

  • READTEXT

  • REVERT

  • SELECT PIVOT(supported from 3.4.0 and higher releases except when used in a view definition, a common table expression, or a join)/UNPIVOT

  • SELECT TOP x PERCENT WHERE x <> 100

  • SELECT TOP... WITH TIES

  • SELECT... FOR BROWSE

  • SELECT... FOR XML AUTO

  • SELECT... FOR XML EXPLICIT

  • SEND

  • SET DATEFORMAT

  • SET DEADLOCK_PRIORITY

  • SET FMTONLY

  • SET FORCEPLAN

  • SET NUMERIC_ROUNDABORT ON

  • SET OFFSETS

  • SET REMOTE_PROC_TRANSACTIONS

  • SET SHOWPLAN_TEXT

  • SET SHOWPLAN_XML

  • SET STATISTICS

  • SET STATISTICS PROFILE

  • SET STATISTICS TIME

  • SET STATISTICS XML

  • SHUTDOWN statement

  • UPDATE STATISTICS

  • UPDATETEXT

  • Using EXECUTE to call a SQL function

  • VIEW... CHECK OPTION clause

  • VIEW... VIEW_METADATA clause

  • WAITFOR DELAY

  • WAITFOR TIME

  • WAITFOR, RECEIVE

  • WITH XMLNAMESPACES construct

  • WRITETEXT

  • XPATH expressions