SnowConvert: Tabelas de sistema do Transact

Tabelas do sistema

Transact-SQLSnowflake SQLNotes
SYS.ALL_VIEWSINFORMATION_SCHEMA.VIEWS
SYS.ALL_COLUMNSINFORMATION_SCHEMA.COLUMNS
SYS.COLUMNSINFORMATION_SCHEMA.COLUMNS
SYS.OBJECTSINFORMATION_SCHEMA.OBJECT_PRIVILEGES
SYS.PROCEDURESINFORMATION_SCHEMA.PROCEDURES
SYS.SEQUENCESINFORMATION_SCHEMA.SEQUENCES
SYS.ALL_OBJECTSINFORMATION_SCHEMA.OBJECT_PRIVILEGES
ALL_PARAMETERSNot supported
SYS.ALL_SQL_MODULESNot supported
SYS.ALLOCATION_UNITSNot supported
SYS.ASSEMBLY_MODULESNot supported
SYS.CHECK_CONSTRAINTSNot supported
SYS.COLUMN_STORE_DICTIONARIESNot supported
SYS.COLUMN_STORE_ROW_GROUPSNot supported
SYS.COLUMN_STORE_SEGMENTSNot supported
SYS.COMPUTED_COLUMNSNot supported
SYS.DEFAULT_CONSTRAINTSNot supported
SYS.EVENTSNot supported
SYS.EVENT_NOTIFICATIONSNot supported
SYS.EVENT_NOTIFICATION_EVENT_TYPESNot supported
SYS.EXTENDED_PROCEDURESNot supported
SYS.EXTERNAL_LANGUAGE_FILESNot supported
SYS.EXTERNAL_LANGUAGESNot supported
SYS.EXTERNAL_LIBRARIESNot supported
SYS.EXTERNAL_LIBRARY_FILESNot supported
SYS.FOREIGN_KEYSINFORMATION_SCHEMA.TABLE_CONSTRAINTS
SYS.FOREIGN_KEY_COLUMNSNot supported
SYS.FUNCTION_ORDER_COLUMNSNot supported
SYS.HASH_INDEXESNot supported
SYS.INDEXESNot supported
SYS.INDEX_COLUMNSNot supported
SYS.INDEX_RESUMABLE_OPERATIONSNot supported
SYS.INTERNAL_PARTITIONSNot supported
SYS.INTERNAL_TABLESNot supported
SYS.KEY_CONSTRAINTSNot supported
SYS.MASKED_COLUMNSNot supported
SYS.MEMORY_OPTIMIZED_TABLES_INTERNAL_ATTRIBUTESNot supported
SYS.MODULE_ASSEMBLY_USAGESNot supported
SYS.NUMBERED_PROCEDURESNot supported
SYS.NUMBERED_PROCEDURE_PARAMETERSNot supported
SYS.PARAMETERSNot supported
SYS.PARTITIONSNot supported
SYS.PERIODSNot supported
SYS.SERVER_ASSEMBLY_MODULESNot supported
SYS.SERVER_EVENTSNot supported
SYS.SERVER_EVENTT_NOTIFICATIONSNot supported
SYS.SERVER_SQL_MODULENot supported
SYS.SERVER_TRIGGERSNot supported
SYS._SERVER_TRIGGER_EVENTSNot supported
SYS.SQL_DEPENDENCIESNot supported
SYS.SQL_EXPRESSION_DEPENDENCIESNot supported
SYS.SQL_MODULESNot supported
SYS.STATSNot supported
SYS.STATS_COLUMNSNot supported
SYS.SYNONYMSNot supported
SYS.SYSTEM_COLUMNSNot supported
SYS.SYSTEM_OBJECTSNot supported
SYS.SYSTEM_PARAMETERSNot supported
SYS.SYSTEM_SQL_MODULES"Not supported

Problemas conhecidos

Não foram encontrados problemas.

SYS.FOREIGN_KEYS

Applies to
  • [x] SQL Server

  • [x] Azure Synapse Analytics

Nota

Algumas partes do código de saída foram omitidas por motivos de clareza.

Descrição

Contém uma linha por objeto que é uma restrição FOREIGN KEY (Documentação do SQLServer).

As colunas para FOREIGN KEY (sys.foreign_keys) são as seguintes:

Column nameData typeDescriptionHas equivalent column in Snowflake
<Columns inherited from sys.objects>-For a list of columns that this view inherits, see sys.objects (Transact-SQL).Partial
referenced_object_idintID of the referenced object.No
key_index_idintID of the key index within the referenced object.No
is_disabledbitFOREIGN KEY constraint is disabled.No
is_not_for_replicationbitFOREIGN KEY constraint was created by using the NOT FOR REPLICATION option.No
is_not_trustedbitFOREIGN KEY constraint has not been verified by the system.No
delete_referential_actiontinyintThe referential action that was declared for this FOREIGN KEY when a delete happens. See SQLServer Documentation.No
delete_referential_action_descnvarchar(60)Description of the referential action that was declared for this FOREIGN KEY when a delete occurs. See SQLServer Documentation.No
update_referential_actiontinyintThe referential action that was declared for this FOREIGN KEY when an update happens. See SQLServer Documentation.No
update_referential_action_descnvarchar(60)Description of the referential action that was declared for this FOREIGN KEY when an update happens. See SQLServer Documentation.No
is_system_namedbit

1 = Name was generated by the system.

0 = Name was supplied by the user.

No

As colunas herdadas de sys.objects são as seguintes:

Para obter mais informações, consulte a documentação de sys.objects.

Column nameData typeDescriptionHas equivalent column in Snowflake
namesysnameObject name.Yes
object_idintObject identification number. Is unique within a database.No
principal_idintID of the individual owner, if different from the schema owner.No
schema_idintID of the schema that the object is contained in.No
parent_object_idintID of the object to which this object belongs.No
typechar(2)Object typeYes
type_descnvarchar(60)Description of the object typeYes
create_datedatetimeDate the object was created.Yes
modify_datedatetimeDate the object was last modified by using an ALTER statement.Yes
is_ms_shippedbitObject is created by an internal SQL Server component.No
is_publishedbitObject is created by an internal SQL Server component.No
is_schema_publishedbitOnly the schema of the object is published.No

Observe que, nesse caso, para sys.foreign_keys, não há equivalência no Snowflake. Porém, a equivalência é feita nas colunas herdadas de sys.objects.

Equivalência de coluna aplicável

SQLServerSnowflakeLimitationsApplicable
nameCONSTRAINT_NAMENames auto-generated by the database may be reviewed to the target Snowflake auto-generated name,Yes
typeCONSTRAINT_TYPEThe type column has a variety of options. But, in this case, the support is only for the letter 'F' which represents the foreign keys.No. Because of the extra validation to determine the foreign keys from all table constraints, it is not applicable.
type_descCONSTRAINT_TYPENo limitions found.No. Because of the extra validation to determine the foreign keys from all table constraints, it is not applicable.
create_dateCREATEDData type differences.Yes
modify_dateLAST_ALTEREDData type differences.Yes
parent_object_idCONSTRAINT_CATALOG, CONSTRAINT_SCHEMA, TABLE_NAMEColumns are generated only for the cases that use the OBJECT_ID() function and, the name has a valid pattern.Yes
Sintaxe no SQL Server
 SELECT ('column_name' | * )
FROM sys.foreign_keys;
Copy
Sintaxe no Snowflake
 SELECT ('column_name' | * )
FROM information_schema.table_constraints 
WHERE CONSTRAINT_TYPE = 'FOREIGN KEY';
Copy

Nota

Como a equivalência para as chaves estrangeiras do sistema é a visualização do catálogo no Snowflake para in ormation_schema.table_constraints, é necessário definir o tipo da restrição em uma cláusula adicional “WHERE” para identificar as restrições de chave estrangeira de outras restrições.

Amostra de padrões da origem

Para realizar corretamente as amostras a seguir (exceto número de padrão 3), é necessário executar as seguintes instruções:

 CREATE TABLE Customers (
    CustomerID INT PRIMARY KEY,
    FirstName VARCHAR(50),
    LastName VARCHAR(50),
    Email VARCHAR(100)
);

CREATE TABLE Orders (
    OrderID INT PRIMARY KEY,
    CustomerID INT,
    OrderDate DATE,
    TotalAmount DECIMAL(10, 2),
    CONSTRAINT FK_Name_Test FOREIGN KEY (CustomerID) REFERENCES Customers(CustomerID)
);


INSERT INTO Customers (CustomerID, FirstName, LastName, Email)
VALUES
    (1, 'John', 'Doe', 'john.doe@example.com'),
    (2, 'Jane', 'Smith', 'jane.smith@example.com');

INSERT INTO Orders (OrderID, CustomerID, OrderDate, TotalAmount)
VALUES
    (101, 1, '2023-09-01', 100.50),
    (102, 1, '2023-09-02', 75.25),
    (103, 2, '2023-09-03', 50.00);
Copy
 CREATE OR REPLACE TABLE Customers (
    CustomerID INT PRIMARY KEY,
    FirstName VARCHAR(50),
    LastName VARCHAR(50),
    Email VARCHAR(100)
)
COMMENT = '{"origin":"sf_sc","name":"snowconvert","version":{"major":1, "minor":0},{"attributes":{"component":"transact"}}'
;

CREATE OR REPLACE TABLE Orders (
    OrderID INT PRIMARY KEY,
    CustomerID INT,
    OrderDate DATE,
    TotalAmount DECIMAL(10, 2),
       CONSTRAINT FK_Name_Test FOREIGN KEY (CustomerID) REFERENCES Customers (CustomerID)
   )
COMMENT = '{"origin":"sf_sc","name":"snowconvert","version":{"major":1, "minor":0},{"attributes":{"component":"transact"}}'
;

INSERT INTO Customers (CustomerID, FirstName, LastName, Email)
VALUES
    (1, 'John', 'Doe', 'john.doe@example.com'),
    (2, 'Jane', 'Smith', 'jane.smith@example.com');

INSERT INTO Orders (OrderID, CustomerID, OrderDate, TotalAmount)
VALUES
    (101, 1, '2023-09-01', 100.50),
    (102, 1, '2023-09-02', 75.25),
    (103, 2, '2023-09-03', 50.00);
Copy

1. Simple Select Case

SQL Server
 SELECT *
FROM sys.foreign_keys;
Copy
nameobject_idprincipal_idschema_idtypetype_desccreate_datemodify_dateparent_object_idis_ms_shippedis_publishedis_schema_publishedreferenced_object_idkey_index_idis_disabledis_not_for_replicationis_not_trusteddelete_referential_actiondelete_referential_action_descupdate_referential_actionupdate_referential_action_descis_system_named
FK_Name_Test1719677174NULL1FFOREIGN_KEY_CONSTRAINT2023-09-11 22:20:04.1602023-09-11 22:20:04.1601687677060falsetruefalse16556769461falsefalse0NO_ACTION0NO_ACTIONtrue
Snowflake
 SELECT *
FROM
INFORMATION_SCHEMA.TABLE_CONSTRAINTS
WHERE
CONSTRAINT_TYPE = 'FOREIGN KEY';
Copy
CONSTRAINT_CATALOGCONSTRAINT_SCHEMACONSTRAINT_NAMETABLE_CATALOGTABLE_SCHEMATABLE_NAMECONSTRAINT_TYPEIS_DEFERRABLEINITIALLY_DEFERREDENFORCEDCOMMENTCREATEDLAST_ALTEREDRELY
DBTESTPUBLICFK_Name_TestDATETESTPUBLICORDERSFOREIGN KEYNOYESNOnull2023-09-11 15:23:51.969 -07002023-09-11 15:23:52.097 -0700NO

Aviso

Os resultados diferem devido às diferenças nos objetos da coluna e à equivalência ausente. O resultado pode ser verificado.

2. Name Column Case

SQL Server
 SELECT * FROM sys.foreign_keys WHERE name = 'FK_Name_Test';
Copy
nameobject_idprincipal_idschema_idtypetype_desccreate_datemodify_dateparent_object_idis_ms_shippedis_publishedis_schema_publishedreferenced_object_idkey_index_idis_disabledis_not_for_replicationis_not_trusteddelete_referential_actiondelete_referential_action_descupdate_referential_actionupdate_referential_action_descis_system_named
FK_Name_Test1719677174NULL1FFOREIGN_KEY_CONSTRAINT2023-09-11 22:20:04.1602023-09-11 22:20:04.1601687677060falsetruefalse16556769461falsefalse0NO_ACTION0NO_ACTIONtrue
Snowflake
 SELECT * FROM
INFORMATION_SCHEMA.TABLE_CONSTRAINTS
WHERE
CONSTRAINT_NAME = 'FK_NAME_TEST'
AND CONSTRAINT_TYPE = 'FOREIGN KEY';
Copy
CONSTRAINT_CATALOGCONSTRAINT_SCHEMACONSTRAINT_NAMETABLE_CATALOGTABLE_SCHEMATABLE_NAMECONSTRAINT_TYPEIS_DEFERRABLEINITIALLY_DEFERREDENFORCEDCOMMENTCREATEDLAST_ALTEREDRELY
DBTESTPUBLICFK_Name_TestDATETESTPUBLICORDERSFOREIGN KEYNOYESNOnull2023-09-11 15:23:51.969 -07002023-09-11 15:23:52.097 -0700NO

Aviso

Essa conversão pode exigir verificação se o nome da restrição for gerado automaticamente pelo banco de dados e usado na consulta. Para obter mais informações, consulte a seção Problemas conhecidos.

3. Parent Object ID Case

Neste exemplo, foram criados um banco de dados e um esquema para exemplificar o processamento dos nomes para criar colunas diferentes e equivalentes.

SQL Server
 use database_name_test
create schema schema_name_test

CREATE TABLE schema_name_test.Customers (
    CustomerID INT PRIMARY KEY,
    FirstName VARCHAR(50),
    LastName VARCHAR(50),
    Email VARCHAR(100)
);

CREATE TABLE schema_name_test.Orders (
    OrderID INT PRIMARY KEY,
    CustomerID INT,
    OrderDate DATE,
    TotalAmount DECIMAL(10, 2),
    CONSTRAINT FK_Name_Test FOREIGN KEY (CustomerID) REFERENCES schema_name_test.Customers(CustomerID)
);

INSERT INTO schema_name_test.Customers (CustomerID, FirstName, LastName, Email)
VALUES
    (1, 'John', 'Doe', 'john.doe@example.com'),
    (2, 'Jane', 'Smith', 'jane.smith@example.com');

INSERT INTO schema_name_test.Orders (OrderID, CustomerID, OrderDate, TotalAmount)
VALUES
    (101, 1, '2023-09-01', 100.50),
    (102, 1, '2023-09-02', 75.25),
    (103, 2, '2023-09-03', 50.00);

SELECT * FROM sys.foreign_keys WHERE name = 'FK_Name_Test' AND parent_object_id = OBJECT_ID(N'database_name_test.schema_name_test.Orders')
Copy
nameobject_idprincipal_idschema_idtypetype_desccreate_datemodify_dateparent_object_idis_ms_shippedis_publishedis_schema_publishedreferenced_object_idkey_index_idis_disabledis_not_for_replicationis_not_trusteddelete_referential_actiondelete_referential_action_descupdate_referential_actionupdate_referential_action_descis_system_named
FK_Name_Test1719677174NULL1FFOREIGN_KEY_CONSTRAINT2023-09-11 22:20:04.1602023-09-11 22:20:04.1601687677060falsetruefalse16556769461falsefalse0NO_ACTION0NO_ACTIONtrue
Snowflake
 USE DATABASE database_name_test;

CREATE OR REPLACE SCHEMA schema_name_test
COMMENT = '{"origin":"sf_sc","name":"snowconvert","version":{"major":1, "minor":0},"attributes":{"component":"transact"}}'
;

CREATE OR REPLACE TABLE schema_name_test.Customers (
    CustomerID INT PRIMARY KEY,
    FirstName VARCHAR(50),
    LastName VARCHAR(50),
    Email VARCHAR(100)
)
COMMENT = '{"origin":"sf_sc","name":"snowconvert","version":{"major":1, "minor":0},"attributes":{"component":"transact"}}'
;

CREATE OR REPLACE TABLE schema_name_test.Orders (
    OrderID INT PRIMARY KEY,
    CustomerID INT,
    OrderDate DATE,
    TotalAmount DECIMAL(10, 2),
       CONSTRAINT FK_Name_Test FOREIGN KEY (CustomerID) REFERENCES schema_name_test.Customers (CustomerID)
   )
COMMENT = '{"origin":"sf_sc","name":"snowconvert","version":{"major":1, "minor":0},"attributes":{"component":"transact"}}'
;

INSERT INTO schema_name_test.Customers (CustomerID, FirstName, LastName, Email)
VALUES
    (1, 'John', 'Doe', 'john.doe@example.com'),
    (2, 'Jane', 'Smith', 'jane.smith@example.com');

INSERT INTO schema_name_test.Orders (OrderID, CustomerID, OrderDate, TotalAmount)
VALUES
    (101, 1, '2023-09-01', 100.50),
    (102, 1, '2023-09-02', 75.25),
    (103, 2, '2023-09-03', 50.00);

SELECT * FROM
    INFORMATION_SCHEMA.TABLE_CONSTRAINTS
WHERE
    CONSTRAINT_NAME = 'FK_NAME_TEST'
    AND CONSTRAINT_CATALOG = 'DATABASE_NAME_TEST'
    AND CONSTRAINT_SCHEMA = 'SCHEMA_NAME_TEST'
    AND TABLE_NAME = 'ORDERS'
    AND CONSTRAINT_TYPE = 'FOREIGN KEY';
Copy
CONSTRAINT_CATALOGCONSTRAINT_SCHEMACONSTRAINT_NAMETABLE_CATALOGTABLE_SCHEMATABLE_NAMECONSTRAINT_TYPEIS_DEFERRABLEINITIALLY_DEFERREDENFORCEDCOMMENTCREATEDLAST_ALTEREDRELY
DATABASE_NAME_TESTSCHEMA_NAME_TESTFK_Name_TestDATABASE_NAME_TESTSCHEMA_NAME_TESTORDERSFOREIGN KEYNOYESNOnull2023-09-11 15:23:51.969 -07002023-09-11 15:23:52.097 -0700NO

Aviso

Se o nome que vem dentro da função OBJECT_ID() não tiver um padrão válido, ele não será convertido devido às limitações de processamento de nomes em caracteres especiais.

Aviso

Analise o banco de dados que está sendo usado no Snowflake.

4. Type Column Case

O «F» no SQL Server significa «Foreign Key» e é removido devido à validação no final para especificar a chave estrangeira de todas as restrições da tabela.

SQL Server
 SELECT * FROM sys.foreign_keys WHERE type = 'F';
Copy
nameobject_idprincipal_idschema_idtypetype_desccreate_datemodify_dateparent_object_idis_ms_shippedis_publishedis_schema_publishedreferenced_object_idkey_index_idis_disabledis_not_for_replicationis_not_trusteddelete_referential_actiondelete_referential_action_descupdate_referential_actionupdate_referential_action_descis_system_named
FK_Name_Test1719677174NULL3FFOREIGN_KEY_CONSTRAINT2023-09-11 22:20:04.1602023-09-11 22:20:04.1601687677060falsetruefalse16556769461falsefalse0NO_ACTION0NO_ACTIONtrue
Snowflake
 SELECT * FROM
    INFORMATION_SCHEMA.TABLE_CONSTRAINTS
WHERE
    type = 'F' AND CONSTRAINT_TYPE = 'FOREIGN KEY';
Copy
CONSTRAINT_CATALOGCONSTRAINT_SCHEMACONSTRAINT_NAMETABLE_CATALOGTABLE_SCHEMATABLE_NAMECONSTRAINT_TYPEIS_DEFERRABLEINITIALLY_DEFERREDENFORCEDCOMMENTCREATEDLAST_ALTEREDRELY
DBTESTPUBLICFK_Name_TestDATETESTPUBLICORDERSFOREIGN KEYNOYESNOnull2023-09-11 15:23:51.969 -07002023-09-11 15:23:52.097 -0700NO

5. Type Desc Column Case

A coluna «type_desc» foi removida devido à validação no final para especificar a chave estrangeira de todas as restrições da tabela.

SQL Server
 SELECT
    * 
FROM
    sys.foreign_keys 
WHERE 
    type_desc = 'FOREIGN_KEY_CONSTRAINT';
Copy
nameobject_idprincipal_idschema_idtypetype_desccreate_datemodify_dateparent_object_idis_ms_shippedis_publishedis_schema_publishedreferenced_object_idkey_index_idis_disabledis_not_for_replicationis_not_trusteddelete_referential_actiondelete_referential_action_descupdate_referential_actionupdate_referential_action_descis_system_named
FK_Name_Test1719677174NULL3FFOREIGN_KEY_CONSTRAINT2023-09-11 22:20:04.1602023-09-11 22:20:04.1601687677060falsetruefalse16556769461falsefalse0NO_ACTION0NO_ACTIONtrue
Snowflake
 SELECT
    *
FROM
    INFORMATION_SCHEMA.TABLE_CONSTRAINTS
WHERE
    type_desc = 'FOREIGN_KEY_CONSTRAINT' AND CONSTRAINT_TYPE = 'FOREIGN KEY';
Copy
CONSTRAINT_CATALOGCONSTRAINT_SCHEMACONSTRAINT_NAMETABLE_CATALOGTABLE_SCHEMATABLE_NAMECONSTRAINT_TYPEIS_DEFERRABLEINITIALLY_DEFERREDENFORCEDCOMMENTCREATEDLAST_ALTEREDRELY
DBTESTPUBLICFK_Name_TestDATETESTPUBLICORDERSFOREIGN KEYNOYESNOnull2023-09-11 15:23:51.969 -07002023-09-11 15:23:52.097 -0700NO

6. Modify Date Column Simple Case

SQL Server
 SELECT *
FROM sys.foreign_keys
WHERE modify_date = CURRENT_TIMESTAMP;
Copy
The query produced no results.

Copy
Snowflake
 SELECT *
FROM
    INFORMATION_SCHEMA.TABLE_CONSTRAINTS
WHERE
    LAST_ALTERED = CURRENT_TIMESTAMP()
    AND CONSTRAINT_TYPE = 'FOREIGN KEY';
Copy
The query produced no results.

Copy

7. Modify Date Column with DATEDIFF() Case

O exemplo a seguir mostra um cenário mais complexo em que as colunas de sys.foreign_keys (herdadas de sys.objects) estão dentro de uma função DATEDIFF. Nesse caso, o argumento correspondente à equivalência aplicável é alterado para a coluna correspondente de information.schema no Snowflake.

SQL Server
 SELECT *
FROM sys.foreign_keys
WHERE DATEDIFF(DAY, modify_date, GETDATE()) <= 30;
Copy
The foreign keys altered in the last 30 days.

Copy
Snowflake
 SELECT *
FROM
    INFORMATION_SCHEMA.TABLE_CONSTRAINTS
WHERE
    DATEDIFF(DAY, LAST_ALTERED, CURRENT_TIMESTAMP() :: TIMESTAMP) <= 30
    AND CONSTRAINT_TYPE = 'FOREIGN KEY';
Copy
The foreign keys altered in the last 30 days.

Copy

8. Create Date Column Case

SQL Server
 SELECT *
FROM sys.foreign_keys
WHERE create_date = '2023-09-12 14:36:38.060';
Copy
The foreign keys that were created on the specified date and time.

Copy
Snowflake
 SELECT *
FROM
    INFORMATION_SCHEMA.TABLE_CONSTRAINTS
WHERE
    CREATED = '2023-09-12 14:36:38.060'
    AND CONSTRAINT_TYPE = 'FOREIGN KEY';
Copy
The foreign keys that were created on the specified date and time.

Copy

Aviso

O resultado pode mudar se a data de criação for específica devido ao horário em que as consultas foram executadas. É possível executar uma consulta específica em um momento no banco de dados de origem e, em seguida, executar os objetos em outro momento nas novas consultas do Snowflake.

9. Selected Columns Single Name Case

SQL Server
 SELECT name
FROM sys.foreign_keys;
Copy

name

FK_Name_Test

Snowflake
 SELECT
    CONSTRAINT_NAME
FROM
    INFORMATION_SCHEMA.TABLE_CONSTRAINTS
WHERE
    CONSTRAINT_TYPE = 'FOREIGN KEY';
Copy

CONSTRAINT_NAME

FK_Name_Test

10. Selected Columns Qualified Name Case

SQL Server
 SELECT
    fk.name
FROM sys.foreign_keys AS fk;
Copy

name

FK_Name_Test

Snowflake
 SELECT
    fk.CONSTRAINT_NAME
FROM
    INFORMATION_SCHEMA.TABLE_CONSTRAINTS AS fk
WHERE
    CONSTRAINT_TYPE = 'FOREIGN KEY';
Copy

CONSTRAINT_NAME

FK_Name_Test

Problemas conhecidos

1. The “name” column may not show a correct output if the constraint does not have a user-created name

Se o nome referenciado for gerado automaticamente a partir do banco de dados, é provável que você o revise e use o valor desejado.

2. When selecting columns, there is a limitation that depends on the applicable columns that are equivalent in Snowflake

Como as colunas de sys.foreign_keys não são totalmente equivalentes no Snowflake, alguns resultados podem mudar devido às limitações da equivalência.

3. The OBJECT_ID() function may have a valid pattern to be processed or the database, schema or table could not be extracted

Com base no nome que recebe a função OBJECT_ID(), o processamento desse nome será limitado e dependerá da formatação.

4. Name Column With OBJECT_NAME() Function Case

Como a função OBJECT_NAME() ainda não é compatível, as transformações relacionadas a essa função não são compatíveis.

 SELECT name AS ForeignKeyName,
       OBJECT_NAME(parent_object_id) AS ReferencingTable,
       OBJECT_NAME(referenced_object_id) AS ReferencedTable
FROM sys.foreign_keys;
Copy
 SELECT
    name AS ForeignKeyName,
    !!!RESOLVE EWI!!! /*** SSC-EWI-0073 - PENDING FUNCTIONAL EQUIVALENCE REVIEW FOR 'OBJECT_NAME' NODE ***/!!!
    OBJECT_NAME(parent_object_id) AS ReferencingTable,
    !!!RESOLVE EWI!!! /*** SSC-EWI-0073 - PENDING FUNCTIONAL EQUIVALENCE REVIEW FOR 'OBJECT_NAME' NODE ***/!!!
    OBJECT_NAME(referenced_object_id) AS ReferencedTable
FROM
    INFORMATION_SCHEMA.TABLE_CONSTRAINTS
WHERE
    CONSTRAINT_TYPE = 'FOREIGN KEY';
Copy
5. SCHEMA_NAME() and TYPE_NAME() functions are also not supported yet.
6. Different Join statement types may be not supported if the system table is not supported.
7. Cases with JOIN statements are not supported.
8. Names with alias AS are not supported.

EWIs relacionados

  1. SSC-EWI-0073: Revisão de equivalência funcional pendente.