This page provides a guide to Establishing a Connection to Azure Table Storage in CData Cloud, as well as information on the available resources, and a reference to the available connection properties.

Connecting to Azure Table Storage

Establishing a Connection shows how to authenticate to Azure Table Storage and configure any necessary connection properties to create a database in CData Cloud

Accessing Data from CData Cloud Services

Accessing data from Azure Table Storage through the available standard services and CData Cloud administration is documented in further details in the CData Cloud Documentation.

Connect to Azure Table Storage by selecting the corresponding icon in the Database tab. Required properties are listed under Settings. The Advanced tab lists connection properties that are not typically required.

Connecting to Azure Table Storage APIs

The driver will connect to the Azure Table Storage account specified by Account. By default, connections to the Azure Table Storage are secured via SSL, though this can be controlled through UseSSL. The authentication method to the Azure Table Storage is determined by the AuthScheme property.

Authenticating to Azure Table Storage

The following mechanisms may be used to authenticate.

Access Key

Set Account to the storage account name and set the AccessKey of the storage account to connect. Follow the steps below to obtain these values:

If using Storage as the Backend (default):

1. Log into the Azure portal and select Storage Accounts in the services menu on the left.
2. If you currently do not have any storage accounts, create one by clicking the Add button.
3. Click the link for the storage account you want to use and select Access Keys under Settings. The Access Keys window contains the storage account name and key (you can use either key1 or key2 to connect) that you will need to use in the Cloud. These properties map to the Account and AccessKey Cloud connection properties respectively.

If using CosmosDB as the Backend:

1. Log into the Azure portal and select Cosmos DB in the services menu on the left.
2. Click the link for the Cosmos DB account you want to use and select Connection String under Settings. The Connection String window contains the Cosmos DB account name and primary key that you will need to use in the Cloud. These properties map to the Account and AccessKey Cloud connection properties respectively.

Shared Access Signature

Set Account to the storage account name and set the SharedAccessSignature to a valid signature of a resource to connect to. The SharedAccessSignature may be generated with a tool such as Azure Storage Explorer.

Typically when SharedAccessSignature is used, the specific table to work with must also be specified via the Tables connection property. If no table is specified, a table listing will be attemped, but may fail due to a lack of permissions.

Customizing the SSL Configuration

By default, the Cloud attempts to negotiate TLS with the server. The server certificate is validated against the default system trusted certificate store. You can override how the certificate gets validated using the SSLServerCert connection property.

To specify another certificate, see the SSLServerCert connection property.

Connecting Through a Firewall or Proxy

HTTP Proxies

To authenticate to an HTTP proxy, set the following:

• ProxyServer: the hostname or IP address of the proxy server that you want to route HTTP traffic through.
• ProxyPort: the TCP port that the proxy server is running on.
• ProxyAuthScheme: the authentication method the Cloud uses when authenticating to the proxy server.
• ProxyUser: the username of a user account registered with the proxy server.
• ProxyPassword: the password associated with the ProxyUser.

Other Proxies

Set the following properties:

• To use a proxy-based firewall, set FirewallType, FirewallServer, and FirewallPort.
• To tunnel the connection, set FirewallType to TUNNEL.
• To authenticate, specify FirewallUser and FirewallPassword.
• To authenticate to a SOCKS proxy, additionally set FirewallType to SOCKS5.

The Cloud allows you to access data in Azure Table storage through a standard database-like interface. Azure tables are highly scalable NoSQL cloud databases that are very different from a regular database. In this section we describe how we model schemaless Azure tables as regular tables. See Tables, Table Columns, and Stored Procedures.

The list of tables is dynamically retrieved from your Azure account, so that any additions or deletions are immediately reflected when you connect with the Cloud. You can use the CreateTable stored procedure to create a new table.

Azure tables require both a Partition Key and a Row Key. Both will need to be set for all queries besides SELECT queries.

Since Azure Table Storage tables are schemaless, the Cloud offers the following two mechanisms to uncover the schema.

Dynamic Schemas

The columns of a table are dynamically determined by scanning data in the first few rows. You can adjust the number of rows that are used by modifying the RowScanDepth property. When TypeDetectionScheme is set to "RowScan", the row scan also determines the data type. The following table shows how the different data types supported by Azure Table Storage are modeled in the Cloud.

Azure Table Storage Type	Modeled Type	Sample Value
Edm.Binary	String	10
Edm.Boolean	Boolean	True
Edm.DateTime	Datetime	2014-09-23 08:23:45 PM
Edm.Double	Double	3.14159265
Edm.Int32	Integer	123
Edm.Int64	Long	25000000000
Edm.String	String	USA

Static Schemas

Instead of using dynamically discovered schemas, you can define your own schemas. This will give you more control over the projected columns and also enable you to manually define data types. Refer to the sample schema included with the Cloud to define your own schema. You can simply change the name of the sample schema file, which must match with the name of the Azure Table Storage table, and edit the column listing to use it for your own table.

Schemaless Operations

The schema of the table is necessary to retrieve data, whether you define it manually or obtain it dynamically. However, data may be inserted, updated, or deleted from columns that do not exist in the schema. Columns that do not already exist in the table schema will have their data types set to String.

Stored procedures are function-like interfaces that extend the functionality of the Cloud beyond simple SELECT/INSERT/UPDATE/DELETE operations with Azure Table Storage.

Stored procedures accept a list of parameters, perform their intended function, and then return any relevant response data from Azure Table Storage, along with an indication of whether the procedure succeeded or failed.

CData Cloud - Azure Table Storage Stored Procedures

Name	Description
CreateEntityWithTypes	Creates a new record with the given data types. If a column is not found on an existing entity, you will need to use this procedure to set the type of the property to something other than string.
CreateTable	Creates a new table in the Azure system.
DropTable	Drops an existing table in the Azure system.

Creates a new record with the given data types. If a column is not found on an existing entity, you will need to use this procedure to set the type of the property to something other than string.

Note: This procedure makes use of indexed parameters. Indexed parameters facilitate providing multiple instances a single parameter as inputs for the procedure.

Suppose there is an input parameter named Param#. To input multiple instances of an indexed parameter like this, execute:

EXEC ProcedureName Param#1 = "value1", Param#2 = "value2", Param#3 = "value3"

In the table below, indexed parameters are denoted with a '#' character at the end of their names.

Input

Name	Type	Required	Description
TableName	String	True	The name of the table.
PartitionKey	String	False	The partition key for the new entity.
RowKey	String	False	The row key for the new entity.
PropertyName#	String	False	The name for the property.
PropertyType#	String	False	The data type for the property. The allowed values are string, integer, datetime, boolean, double, long, binary.
PropertyValue#	String	False	The value for the property.

Result Set Columns

Name	Type	Description
Success	String	Returns true if the entity was created and False otherwise

Creates a new table in the Azure system.

Input

Name	Type	Required	Description
TableName	String	True	The name of the table.

Result Set Columns

Name	Type	Description
Success	String	Returns true if the table was created and False otherwise

Drops an existing table in the Azure system.

Input

Name	Type	Required	Description
TableName	String	True	The name of the table.

Result Set Columns

Name	Type	Description
Success	String	Returns true if the table was deleted and False otherwise

You can query the system tables described in this section to access schema information, information on data source functionality, and batch operation statistics.

Schema Tables

The following tables return database metadata for Azure Table Storage:

• sys_catalogs: Lists the available databases.
• sys_schemas: Lists the available schemas.
• sys_tables: Lists the available tables and views.
• sys_tablecolumns: Describes the columns of the available tables and views.
• sys_procedures: Describes the available stored procedures.
• sys_procedureparameters: Describes stored procedure parameters.
• sys_keycolumns: Describes the primary and foreign keys.
• sys_indexes: Describes the available indexes.

Data Source Tables

The following tables return information about how to connect to and query the data source:

• sys_connection_props: Returns information on the available connection properties.
• sys_sqlinfo: Describes the SELECT queries that the Cloud can offload to the data source.

Query Information Tables

The following table returns query statistics for data modification queries:

• sys_identity: Returns information about batch operations or single updates.

Lists the available databases.

The following query retrieves all databases determined by the connection string:

SELECT * FROM sys_catalogs

Columns

Name	Type	Description
CatalogName	String	The database name.

Lists the available schemas.

The following query retrieves all available schemas:

          SELECT * FROM sys_schemas
          

Columns

Name	Type	Description
CatalogName	String	The database name.
SchemaName	String	The schema name.

Lists the available tables.

The following query retrieves the available tables and views:

          SELECT * FROM sys_tables
          

Columns

Name	Type	Description
CatalogName	String	The database containing the table or view.
SchemaName	String	The schema containing the table or view.
TableName	String	The name of the table or view.
TableType	String	The table type (table or view).
Description	String	A description of the table or view.
IsUpdateable	Boolean	Whether the table can be updated.

Describes the columns of the available tables and views.

The following query returns the columns and data types for the NorthwindProducts table:

SELECT ColumnName, DataTypeName FROM sys_tablecolumns WHERE TableName='NorthwindProducts' 

Columns

Name	Type	Description
CatalogName	String	The name of the database containing the table or view.
SchemaName	String	The schema containing the table or view.
TableName	String	The name of the table or view containing the column.
ColumnName	String	The column name.
DataTypeName	String	The data type name.
DataType	Int32	An integer indicating the data type. This value is determined at run time based on the environment.
Length	Int32	The storage size of the column.
DisplaySize	Int32	The designated column's normal maximum width in characters.
NumericPrecision	Int32	The maximum number of digits in numeric data. The column length in characters for character and date-time data.
NumericScale	Int32	The column scale or number of digits to the right of the decimal point.
IsNullable	Boolean	Whether the column can contain null.
Description	String	A brief description of the column.
Ordinal	Int32	The sequence number of the column.
IsAutoIncrement	String	Whether the column value is assigned in fixed increments.
IsGeneratedColumn	String	Whether the column is generated.
IsHidden	Boolean	Whether the column is hidden.
IsArray	Boolean	Whether the column is an array.
IsReadOnly	Boolean	Whether the column is read-only.
IsKey	Boolean	Indicates whether a field returned from sys_tablecolumns is the primary key of the table.
ColumnType	String	The role or classification of the column in the schema. Possible values include SYSTEM, LINKEDCOLUMN, NAVIGATIONKEY, REFERENCECOLUMN, and NAVIGATIONPARENTCOLUMN.

Lists the available stored procedures.

The following query retrieves the available stored procedures:

          SELECT * FROM sys_procedures
          

Columns

Name	Type	Description
CatalogName	String	The database containing the stored procedure.
SchemaName	String	The schema containing the stored procedure.
ProcedureName	String	The name of the stored procedure.
Description	String	A description of the stored procedure.
ProcedureType	String	The type of the procedure, such as PROCEDURE or FUNCTION.

Describes stored procedure parameters.

The following query returns information about all of the input parameters for the CreateTable stored procedure:

SELECT * FROM sys_procedureparameters WHERE ProcedureName = 'CreateTable' AND Direction = 1 OR Direction = 2

To include result set columns in addition to the parameters, set the IncludeResultColumns pseudo column to True:

SELECT * FROM sys_procedureparameters WHERE ProcedureName = 'CreateTable' AND IncludeResultColumns='True'

Columns

Name	Type	Description
CatalogName	String	The name of the database containing the stored procedure.
SchemaName	String	The name of the schema containing the stored procedure.
ProcedureName	String	The name of the stored procedure containing the parameter.
ColumnName	String	The name of the stored procedure parameter.
Direction	Int32	An integer corresponding to the type of the parameter: input (1), input/output (2), or output(4). input/output type parameters can be both input and output parameters.
DataType	Int32	An integer indicating the data type. This value is determined at run time based on the environment.
DataTypeName	String	The name of the data type.
NumericPrecision	Int32	The maximum precision for numeric data. The column length in characters for character and date-time data.
Length	Int32	The number of characters allowed for character data. The number of digits allowed for numeric data.
NumericScale	Int32	The number of digits to the right of the decimal point in numeric data.
IsNullable	Boolean	Whether the parameter can contain null.
IsRequired	Boolean	Whether the parameter is required for execution of the procedure.
IsArray	Boolean	Whether the parameter is an array.
Description	String	The description of the parameter.
Ordinal	Int32	The index of the parameter.
Values	String	The values you can set in this parameter are limited to those shown in this column. Possible values are comma-separated.
SupportsStreams	Boolean	Whether the parameter represents a file that you can pass as either a file path or a stream.
IsPath	Boolean	Whether the parameter is a target path for a schema creation operation.
Default	String	The value used for this parameter when no value is specified.
SpecificName	String	A label that, when multiple stored procedures have the same name, uniquely identifies each identically-named stored procedure. If there's only one procedure with a given name, its name is simply reflected here.
IsCDataProvided	Boolean	Whether the procedure is added/implemented by CData, as opposed to being a native Azure Table Storage procedure.

Pseudo-Columns

Name	Type	Description
IncludeResultColumns	Boolean	Whether the output should include columns from the result set in addition to parameters. Defaults to False.

Describes the primary and foreign keys.

The following query retrieves the primary key for the NorthwindProducts table:

         SELECT * FROM sys_keycolumns WHERE IsKey='True' AND TableName='NorthwindProducts' 
          

Columns

Name	Type	Description
CatalogName	String	The name of the database containing the key.
SchemaName	String	The name of the schema containing the key.
TableName	String	The name of the table containing the key.
ColumnName	String	The name of the key column.
IsKey	Boolean	Whether the column is a primary key in the table referenced in the TableName field.
IsForeignKey	Boolean	Whether the column is a foreign key referenced in the TableName field.
PrimaryKeyName	String	The name of the primary key.
ForeignKeyName	String	The name of the foreign key.
ReferencedCatalogName	String	The database containing the primary key.
ReferencedSchemaName	String	The schema containing the primary key.
ReferencedTableName	String	The table containing the primary key.
ReferencedColumnName	String	The column name of the primary key.

Describes the foreign keys.

The following query retrieves all foreign keys which refer to other tables:

         SELECT * FROM sys_foreignkeys WHERE ForeignKeyType = 'FOREIGNKEY_TYPE_IMPORT'
          

Columns

Name	Type	Description
CatalogName	String	The name of the database containing the key.
SchemaName	String	The name of the schema containing the key.
TableName	String	The name of the table containing the key.
ColumnName	String	The name of the key column.
PrimaryKeyName	String	The name of the primary key.
ForeignKeyName	String	The name of the foreign key.
ReferencedCatalogName	String	The database containing the primary key.
ReferencedSchemaName	String	The schema containing the primary key.
ReferencedTableName	String	The table containing the primary key.
ReferencedColumnName	String	The column name of the primary key.
ForeignKeyType	String	Designates whether the foreign key is an import (points to other tables) or export (referenced from other tables) key.

Describes the primary keys.

The following query retrieves the primary keys from all tables and views:

         SELECT * FROM sys_primarykeys
          

Columns

Name	Type	Description
CatalogName	String	The name of the database containing the key.
SchemaName	String	The name of the schema containing the key.
TableName	String	The name of the table containing the key.
ColumnName	String	The name of the key column.
KeySeq	String	The sequence number of the primary key.
KeyName	String	The name of the primary key.

Describes the available indexes. By filtering on indexes, you can write more selective queries with faster query response times.

The following query retrieves all indexes that are not primary keys:

          SELECT * FROM sys_indexes WHERE IsPrimary='false'
          

Columns

Name	Type	Description
CatalogName	String	The name of the database containing the index.
SchemaName	String	The name of the schema containing the index.
TableName	String	The name of the table containing the index.
IndexName	String	The index name.
ColumnName	String	The name of the column associated with the index.
IsUnique	Boolean	True if the index is unique. False otherwise.
IsPrimary	Boolean	True if the index is a primary key. False otherwise.
Type	Int16	An integer value corresponding to the index type: statistic (0), clustered (1), hashed (2), or other (3).
SortOrder	String	The sort order: A for ascending or D for descending.
OrdinalPosition	Int16	The sequence number of the column in the index.

Returns information on the available connection properties and those set in the connection string.

The following query retrieves all connection properties that have been set in the connection string or set through a default value:

SELECT * FROM sys_connection_props WHERE Value <> ''

Columns

Name	Type	Description
Name	String	The name of the connection property.
ShortDescription	String	A brief description.
Type	String	The data type of the connection property.
Default	String	The default value if one is not explicitly set.
Values	String	A comma-separated list of possible values. A validation error is thrown if another value is specified.
Value	String	The value you set or a preconfigured default.
Required	Boolean	Whether the property is required to connect.
Category	String	The category of the connection property.
IsSessionProperty	String	Whether the property is a session property, used to save information about the current connection.
Sensitivity	String	The sensitivity level of the property. This informs whether the property is obfuscated in logging and authentication forms.
PropertyName	String	A camel-cased truncated form of the connection property name.
Ordinal	Int32	The index of the parameter.
CatOrdinal	Int32	The index of the parameter category.
Hierarchy	String	Shows dependent properties associated that need to be set alongside this one.
Visible	Boolean	Informs whether the property is visible in the connection UI.
ETC	String	Various miscellaneous information about the property.

Describes the SELECT query processing that the Cloud can offload to the data source.

See SQL Compliance for SQL syntax details.

Discovering the Data Source's SELECT Capabilities

Below is an example data set of SQL capabilities. Some aspects of SELECT functionality are returned in a comma-separated list if supported; otherwise, the column contains NO.

Name	Description	Possible Values
AGGREGATE_FUNCTIONS	Supported aggregation functions.	AVG, COUNT, MAX, MIN, SUM, DISTINCT
COUNT	Whether COUNT function is supported.	YES, NO
IDENTIFIER_QUOTE_OPEN_CHAR	The opening character used to escape an identifier.	[
IDENTIFIER_QUOTE_CLOSE_CHAR	The closing character used to escape an identifier.	]
SUPPORTED_OPERATORS	A list of supported SQL operators.	=, >, <, >=, <=, <>, !=, LIKE, NOT LIKE, IN, NOT IN, IS NULL, IS NOT NULL, AND, OR
GROUP_BY	Whether GROUP BY is supported, and, if so, the degree of support.	NO, NO_RELATION, EQUALS_SELECT, SQL_GB_COLLATE
OJ_CAPABILITIES	The supported varieties of outer joins supported.	NO, LEFT, RIGHT, FULL, INNER, NOT_ORDERED, ALL_COMPARISON_OPS
OUTER_JOINS	Whether outer joins are supported.	YES, NO
SUBQUERIES	Whether subqueries are supported, and, if so, the degree of support.	NO, COMPARISON, EXISTS, IN, CORRELATED_SUBQUERIES, QUANTIFIED
STRING_FUNCTIONS	Supported string functions.	LENGTH, CHAR, LOCATE, REPLACE, SUBSTRING, RTRIM, LTRIM, RIGHT, LEFT, UCASE, SPACE, SOUNDEX, LCASE, CONCAT, ASCII, REPEAT, OCTET, BIT, POSITION, INSERT, TRIM, UPPER, REGEXP, LOWER, DIFFERENCE, CHARACTER, SUBSTR, STR, REVERSE, PLAN, UUIDTOSTR, TRANSLATE, TRAILING, TO, STUFF, STRTOUUID, STRING, SPLIT, SORTKEY, SIMILAR, REPLICATE, PATINDEX, LPAD, LEN, LEADING, KEY, INSTR, INSERTSTR, HTML, GRAPHICAL, CONVERT, COLLATION, CHARINDEX, BYTE
NUMERIC_FUNCTIONS	Supported numeric functions.	ABS, ACOS, ASIN, ATAN, ATAN2, CEILING, COS, COT, EXP, FLOOR, LOG, MOD, SIGN, SIN, SQRT, TAN, PI, RAND, DEGREES, LOG10, POWER, RADIANS, ROUND, TRUNCATE
TIMEDATE_FUNCTIONS	Supported date/time functions.	NOW, CURDATE, DAYOFMONTH, DAYOFWEEK, DAYOFYEAR, MONTH, QUARTER, WEEK, YEAR, CURTIME, HOUR, MINUTE, SECOND, TIMESTAMPADD, TIMESTAMPDIFF, DAYNAME, MONTHNAME, CURRENT_DATE, CURRENT_TIME, CURRENT_TIMESTAMP, EXTRACT
REPLICATION_SKIP_TABLES	Indicates tables skipped during replication.
REPLICATION_TIMECHECK_COLUMNS	A string array containing a list of columns which will be used to check for (in the given order) to use as a modified column during replication.
IDENTIFIER_PATTERN	String value indicating what string is valid for an identifier.
SUPPORT_TRANSACTION	Indicates if the provider supports transactions such as commit and rollback.	YES, NO
DIALECT	Indicates the SQL dialect to use.
KEY_PROPERTIES	Indicates the properties which identify the uniform database.
SUPPORTS_MULTIPLE_SCHEMAS	Indicates if multiple schemas may exist for the provider.	YES, NO
SUPPORTS_MULTIPLE_CATALOGS	Indicates if multiple catalogs may exist for the provider.	YES, NO
DATASYNCVERSION	The CData Data Sync version needed to access this driver.	Standard, Starter, Professional, Enterprise
DATASYNCCATEGORY	The CData Data Sync category of this driver.	Source, Destination, Cloud Destination
SUPPORTSENHANCEDSQL	Whether enhanced SQL functionality beyond what is offered by the API is supported.	TRUE, FALSE
SUPPORTS_BATCH_OPERATIONS	Whether batch operations are supported.	YES, NO
SQL_CAP	All supported SQL capabilities for this driver.	SELECT, INSERT, DELETE, UPDATE, TRANSACTIONS, ORDERBY, OAUTH, ASSIGNEDID, LIMIT, LIKE, BULKINSERT, COUNT, BULKDELETE, BULKUPDATE, GROUPBY, HAVING, AGGS, OFFSET, REPLICATE, COUNTDISTINCT, JOINS, DROP, CREATE, DISTINCT, INNERJOINS, SUBQUERIES, ALTER, MULTIPLESCHEMAS, GROUPBYNORELATION, OUTERJOINS, UNIONALL, UNION, UPSERT, GETDELETED, CROSSJOINS, GROUPBYCOLLATE, MULTIPLECATS, FULLOUTERJOIN, MERGE, JSONEXTRACT, BULKUPSERT, SUM, SUBQUERIESFULL, MIN, MAX, JOINSFULL, XMLEXTRACT, AVG, MULTISTATEMENTS, FOREIGNKEYS, CASE, LEFTJOINS, COMMAJOINS, WITH, LITERALS, RENAME, NESTEDTABLES, EXECUTE, BATCH, BASIC, INDEX
PREFERRED_CACHE_OPTIONS	A string value specifies the preferred cacheOptions.
ENABLE_EF_ADVANCED_QUERY	Indicates if the driver directly supports advanced queries coming from Entity Framework. If not, queries will be handled client side.	YES, NO
PSEUDO_COLUMNS	A string array indicating the available pseudo columns.
MERGE_ALWAYS	If the value is true, The Merge Mode is forcibly executed in Data Sync.	TRUE, FALSE
REPLICATION_MIN_DATE_QUERY	A select query to return the replicate start datetime.
REPLICATION_MIN_FUNCTION	Allows a provider to specify the formula name to use for executing a server side min.
REPLICATION_START_DATE	Allows a provider to specify a replicate startdate.
REPLICATION_MAX_DATE_QUERY	A select query to return the replicate end datetime.
REPLICATION_MAX_FUNCTION	Allows a provider to specify the formula name to use for executing a server side max.
IGNORE_INTERVALS_ON_INITIAL_REPLICATE	A list of tables which will skip dividing the replicate into chunks on the initial replicate.
CHECKCACHE_USE_PARENTID	Indicates whether the CheckCache statement should be done against the parent key column.	TRUE, FALSE
CREATE_SCHEMA_PROCEDURES	Indicates stored procedures that can be used for generating schema files.

The following query retrieves the operators that can be used in the WHERE clause:

SELECT * FROM sys_sqlinfo WHERE Name = 'SUPPORTED_OPERATORS'

Note that individual tables may have different limitations or requirements on the WHERE clause; refer to the Data Model section for more information.

Columns

Name	Type	Description
NAME	String	A component of SQL syntax, or a capability that can be processed on the server.
VALUE	String	Detail on the supported SQL or SQL syntax.

Returns information about attempted modifications.

The following query retrieves the Ids of the modified rows in a batch operation:

         SELECT * FROM sys_identity
          

Columns

Name	Type	Description
Id	String	The database-generated Id returned from a data modification operation.
Batch	String	An identifier for the batch. 1 for a single operation.
Operation	String	The result of the operation in the batch: INSERTED, UPDATED, or DELETED.
Message	String	SUCCESS or an error message if the update in the batch failed.

Describes the available system information.

The following query retrieves all columns:

SELECT * FROM sys_information

Columns

Name	Type	Description
Product	String	The name of the product.
Version	String	The version number of the product.
Datasource	String	The name of the datasource the product connects to.
NodeId	String	The unique identifier of the machine where the product is installed.
HelpURL	String	The URL to the product's help documentation.
License	String	The license information for the product. (If this information is not available, the field may be left blank or marked as 'N/A'.)
Location	String	The file path location where the product's library is stored.
Environment	String	The version of the environment or rumtine the product is currently running under.
DataSyncVersion	String	The tier of CData Sync required to use this connector.
DataSyncCategory	String	The category of CData Sync functionality (e.g., Source, Destination).

Data Type Mappings

The Cloud maps types from the data source to the corresponding data type available in the schema. The table below documents these mappings.

Azure Table Storage (OData V3)	CData Schema
Edm.Binary	binary
Edm.Boolean	bool
Edm.DateTime	datetime
Edm.Double	double
Edm.Guid	guid
Edm.Int32	int
Edm.Int64	long
Edm.String	string
Edm.TimeOfDay	time

The connection string properties are the various options that can be used to establish a connection. This section provides a complete list of the options you can configure in the connection string for this provider. Click the links for further details.

For more information on establishing a connection, see Establishing a Connection.

Authentication

---

Property	Description
Account	The Windows Azure Storage account name.
UseSSL	This field sets whether SSL is enabled. The default is true.
AccessKey	The key for the storage account.
AuthScheme	The scheme used for authentication. Accepted entries are AccessKey, SharedAccessSignature, AzureAD, AzureServicePrincipal, AzureServicePrincipalCert and AzureMSI. The default value is SharedAccessSignature.
Backend	The backend where data is stored.
SharedAccessSignature	A shared access key signature that may be used for authentication.

Azure Authentication

---

Property	Description
AzureTenant	Identifies the Azure Table Storage tenant being used to access data. Accepts either the tenant's domain name (for example, contoso.onmicrosoft.com ) or its directory (tenant) ID.
AzureEnvironment	Specifies the Azure network environment to which you will connect. Must be the same network to which your Azure account was added.

OAuth

---

Property	Description
OAuthClientId	Specifies the client ID (also known as the consumer key) assigned to your custom OAuth application. This ID is required to identify the application to the OAuth authorization server during authentication.
OAuthClientSecret	Specifies the client secret assigned to your custom OAuth application. This confidential value is used to authenticate the application to the OAuth authorization server. (Custom OAuth applications only.).

SSL

---

Property	Description
SSLServerCert	Specifies the certificate to be accepted from the server when connecting using TLS/SSL.

Logging

---

Property	Description
Verbosity	Specifies the verbosity level of the log file, which controls the amount of detail logged. Supported values range from 1 to 5.

Schema

---

Property	Description
BrowsableSchemas	Optional setting that restricts the schemas reported to a subset of all available schemas. For example, BrowsableSchemas=SchemaA,SchemaB,SchemaC .

Miscellaneous

---

Property	Description
MaxRows	Specifies the maximum number of rows returned for queries that do not include either aggregation or GROUP BY.
Pagesize	Specifies the maximum number of records per page the provider returns when requesting data from Azure Table Storage.
PseudoColumns	Specifies the pseudocolumns to expose as table columns, expressed as a string in the format 'TableName=ColumnName;TableName=ColumnName'.
RowScanDepth	The maximum number of rows to scan to look for the columns available in a table.
Timeout	Specifies the maximum time, in seconds, that the provider waits for a server response before throwing a timeout error.
TypeDetectionScheme	Determines how to determine the data type of columns.

This section provides a complete list of the Authentication properties you can configure in the connection string for this provider.

---

Property	Description
Account	The Windows Azure Storage account name.
UseSSL	This field sets whether SSL is enabled. The default is true.
AccessKey	The key for the storage account.
AuthScheme	The scheme used for authentication. Accepted entries are AccessKey, SharedAccessSignature, AzureAD, AzureServicePrincipal, AzureServicePrincipalCert and AzureMSI. The default value is SharedAccessSignature.
Backend	The backend where data is stored.
SharedAccessSignature	A shared access key signature that may be used for authentication.

The Windows Azure Storage account name.

Data Type

string

Default Value

""

Remarks

The Windows Azure storage account name. To access your Azure storage accounts or create one, log into the Azure portal Click Storage Accounts in the services menu on the left.

If Backend is set to AzureStack, set the Account as the complete host for your data. For example: <account>.nm.azs.sandia.gov.

If Backend is set to Emulator, set the Account as the complete host. For example: http://127.0.0.1:10002/devstoreaccount1.

This field sets whether SSL is enabled. The default is true.

Data Type

bool

Default Value

true

Remarks

This field sets whether SSL is enabled. The default is true.

The key for the storage account.

Data Type

string

Default Value

""

Remarks

To obtain the Access Key, log into the Azure portal and click Storage Accounts in the services menu on the left to list the storage accounts. Select a storage account and click Access Keys in the Settings section. Either key1 or key2 can be used.

If using CosmosDB as the Backend, instead navigate to Cosmos DB service and select your Azure Cosmos DB Account. From the resource menu, go to the Connection String page. Find the PRIMARY KEY value and set AccessKey to this value.

The scheme used for authentication. Accepted entries are AccessKey, SharedAccessSignature, AzureAD, AzureServicePrincipal, AzureServicePrincipalCert and AzureMSI. The default value is SharedAccessSignature.

Possible Values

AccessKey, SharedAccessSignature, AzureAD, AzureServicePrincipal, AzureServicePrincipalCert, AzureMSI

Data Type

string

Default Value

"SharedAccessSignature"

Remarks

• AccessKey: Indicates authentication will be done via AccessKey and Account.
• SharedAccessSignature: Indicates authentication will be done via SharedAccessSignature and Account. Generally Tables must also be set.
• AzureAD: Indicates authentication will be done via Azure Active Directory OAuth.
• AzureServicePrincipal: Set this to authenticate as an Azure Service Principal using a Client Secret.
• AzureServicePrincipalCert: Set this to authenticate as an Azure Service Principal using a Certificate.
• AzureMSI: Set this to automatically obtain Managed Service Identity credentials when running on an Azure VM.

The backend where data is stored.

Possible Values

AzureStack, CosmosDB, Storage, Emulator

Data Type

string

Default Value

"Storage"

Remarks

Data may retrieved from either the classic Azure Table Storage repository, Azure Storage Emulator, or it may be retrieved from CosmosDB. Alternatively, you may specify AzureStack if you are using Azure Stack Hub. If you choose to do so, specify the Account as the complete host for your data. For example: <account>.nm.azs.sandia.gov.

If you choose Emulator, specify the Account and SharedAccessSignature connection property.

A shared access key signature that may be used for authentication.

Data Type

string

Default Value

""

Remarks

A shared access signature. May be used instead of a AccessKey to access resources.

This section provides a complete list of the Azure Authentication properties you can configure in the connection string for this provider.

---

Property	Description
AzureTenant	Identifies the Azure Table Storage tenant being used to access data. Accepts either the tenant's domain name (for example, contoso.onmicrosoft.com ) or its directory (tenant) ID.
AzureEnvironment	Specifies the Azure network environment to which you will connect. Must be the same network to which your Azure account was added.

Identifies the Azure Table Storage tenant being used to access data. Accepts either the tenant's domain name (for example, contoso.onmicrosoft.com ) or its directory (tenant) ID.

Data Type

string

Default Value

""

Remarks

A tenant is a digital container for your organization's users and resources, managed through Microsoft Entra ID (formerly Azure AD). Each tenant is associated with a unique directory ID, and often with a custom domain (for example, microsoft.com or contoso.onmicrosoft.com).

To find the directory (tenant) ID in the Microsoft Entra Admin Center, navigate to Microsoft Entra ID > Properties and copy the value labeled "Directory (tenant) ID".

This property is required in the following cases:

• When AuthScheme is set to AzureServicePrincipal or AzureServicePrincipalCert
• When AuthScheme is AzureAD and the user account belongs to multiple tenants

You can provide the tenant value in one of two formats:

• A domain name (for example, contoso.onmicrosoft.com)
• A directory (tenant) ID in GUID format (for example, c9d7b8e4-1234-4f90-bc1a-2a28e0f9e9e0)

Specifying the tenant explicitly ensures that the authentication request is routed to the correct directory, which is especially important when a user belongs to multiple tenants or when using service principal–based authentication.

If this value is omitted when required, authentication may fail or connect to the wrong tenant. This can result in errors such as unauthorized or resource not found.

Specifies the Azure network environment to which you will connect. Must be the same network to which your Azure account was added.

Possible Values

GLOBAL, CHINA, USGOVT, USGOVTDOD

Data Type

string

Default Value

"GLOBAL"

Remarks

Required if your Azure account is part of a different network than the Global network, such as China, USGOVT, or USGOVTDOD.

This section provides a complete list of the OAuth properties you can configure in the connection string for this provider.

---

Property	Description
OAuthClientId	Specifies the client ID (also known as the consumer key) assigned to your custom OAuth application. This ID is required to identify the application to the OAuth authorization server during authentication.
OAuthClientSecret	Specifies the client secret assigned to your custom OAuth application. This confidential value is used to authenticate the application to the OAuth authorization server. (Custom OAuth applications only.).

Specifies the client ID (also known as the consumer key) assigned to your custom OAuth application. This ID is required to identify the application to the OAuth authorization server during authentication.

Data Type

string

Default Value

""

Remarks

This property is required in two cases:

• When using a custom OAuth application, such as in web-based authentication flows, service-based authentication, or certificate-based flows that require application registration.
• If the driver does not provide embedded OAuth credentials.

(When the driver provides embedded OAuth credentials, this value may already be provided by the Cloud and thus not require manual entry.)

OAuthClientId is generally used alongside other OAuth-related properties such as OAuthClientSecret and OAuthSettingsLocation when configuring an authenticated connection.

OAuthClientId is one of the key connection parameters that need to be set before users can authenticate via OAuth. You can usually find this value in your identity provider’s application registration settings. Look for a field labeled Client ID, Application ID, or Consumer Key.

While the client ID is not considered a confidential value like a client secret, it is still part of your application's identity and should be handled carefully. Avoid exposing it in public repositories or shared configuration files.

For more information on how this property is used when configuring a connection, see Establishing a Connection.

Specifies the client secret assigned to your custom OAuth application. This confidential value is used to authenticate the application to the OAuth authorization server. (Custom OAuth applications only.).

Data Type

string

Default Value

""

Remarks

This property (sometimes called the application secret or consumer secret) is required when using a custom OAuth application in any flow that requires secure client authentication, such as web-based OAuth, service-based connections, or certificate-based authorization flows. It is not required when using an embedded OAuth application.

The client secret is used during the token exchange step of the OAuth flow, when the driver requests an access token from the authorization server. If this value is missing or incorrect, authentication fails with either an invalid_client or an unauthorized_client error.

OAuthClientSecret is one of the key connection parameters that need to be set before users can authenticate via OAuth. You can obtain this value from your identity provider when registering the OAuth application.

Notes:

• This value should be stored securely and never exposed in public repositories, scripts, or unsecured environments.
• Client secrets may also expire after a set period. Be sure to monitor expiration dates and rotate secrets as needed to maintain uninterrupted access.

For more information on how this property is used when configuring a connection, see Establishing a Connection

This section provides a complete list of the SSL properties you can configure in the connection string for this provider.

---

Property	Description
SSLServerCert	Specifies the certificate to be accepted from the server when connecting using TLS/SSL.

Specifies the certificate to be accepted from the server when connecting using TLS/SSL.

Data Type

string

Default Value

""

Remarks

If you are using a TLS/SSL connection, use this property to specify the TLS/SSL certificate to be accepted from the server. If you specify a value for this property, all other certificates that are not trusted by the machine are rejected.

This property can take the following forms:

Description	Example
A full PEM Certificate (example shortened for brevity)	-----BEGIN CERTIFICATE----- MIIChTCCAe4CAQAwDQYJKoZIhv......Qw== -----END CERTIFICATE-----
A path to a local file containing the certificate	C:\cert.cer
The public key (example shortened for brevity)	-----BEGIN RSA PUBLIC KEY----- MIGfMA0GCSq......AQAB -----END RSA PUBLIC KEY-----
The MD5 Thumbprint (hex values can also be either space- or colon-separated)	ecadbdda5a1529c58a1e9e09828d70e4
The SHA1 Thumbprint (hex values can also be either space- or colon-separated)	34a929226ae0819f2ec14b4a3d904f801cbb150d

Note: It is possible to use '*' to signify that all certificates should be accepted, but due to security concerns this is not recommended.

This section provides a complete list of the Logging properties you can configure in the connection string for this provider.

---

Property	Description
Verbosity	Specifies the verbosity level of the log file, which controls the amount of detail logged. Supported values range from 1 to 5.

Specifies the verbosity level of the log file, which controls the amount of detail logged. Supported values range from 1 to 5.

Data Type

string

Default Value

"1"

Remarks

This property defines the level of detail the Cloud includes in the log file. Higher verbosity levels increase the detail of the logged information, but may also result in larger log files and slower performance due to the additional data being captured.

The default verbosity level is 1, which is recommended for regular operation. Higher verbosity levels are primarily intended for debugging purposes. For more information on each level, refer to Logging.

When combined with the LogModules property, Verbosity can refine logging to specific categories of information.

This section provides a complete list of the Schema properties you can configure in the connection string for this provider.

---

Property	Description
BrowsableSchemas	Optional setting that restricts the schemas reported to a subset of all available schemas. For example, BrowsableSchemas=SchemaA,SchemaB,SchemaC .

Optional setting that restricts the schemas reported to a subset of all available schemas. For example, BrowsableSchemas=SchemaA,SchemaB,SchemaC .

Data Type

string

Default Value

""

Remarks

Listing all available database schemas can take extra time, thus degrading performance. Providing a list of schemas in the connection string saves time and improves performance.

This section provides a complete list of the Miscellaneous properties you can configure in the connection string for this provider.

---

Property	Description
MaxRows	Specifies the maximum number of rows returned for queries that do not include either aggregation or GROUP BY.
Pagesize	Specifies the maximum number of records per page the provider returns when requesting data from Azure Table Storage.
PseudoColumns	Specifies the pseudocolumns to expose as table columns, expressed as a string in the format 'TableName=ColumnName;TableName=ColumnName'.
RowScanDepth	The maximum number of rows to scan to look for the columns available in a table.
Timeout	Specifies the maximum time, in seconds, that the provider waits for a server response before throwing a timeout error.
TypeDetectionScheme	Determines how to determine the data type of columns.

Specifies the maximum number of rows returned for queries that do not include either aggregation or GROUP BY.

Data Type

int

Default Value

-1

Remarks

The default value for this property, -1, means that no row limit is enforced unless the query explicitly includes a LIMIT clause. (When a query includes a LIMIT clause, the value specified in the query takes precedence over the MaxRows setting.)

Setting MaxRows to a whole number greater than 0 ensures that queries do not return excessively large result sets by default.

This property is useful for optimizing performance and preventing excessive resource consumption when executing queries that could otherwise return very large datasets.

Specifies the maximum number of records per page the provider returns when requesting data from Azure Table Storage.

Data Type

int

Default Value

1000

Remarks

When processing a query, instead of requesting all of the queried data at once from Azure Table Storage, the Cloud can request the queried data in pieces called pages.

This connection property determines the maximum number of results that the Cloud requests per page.

Note: Setting large page sizes may improve overall query execution time, but doing so causes the Cloud to use more memory when executing queries and risks triggering a timeout.

Specifies the pseudocolumns to expose as table columns, expressed as a string in the format 'TableName=ColumnName;TableName=ColumnName'.

Data Type

string

Default Value

""

Remarks

This property allows you to define which pseudocolumns the Cloud exposes as table columns.

To specify individual pseudocolumns, use the following format:

Table1=Column1;Table1=Column2;Table2=Column3

To include all pseudocolumns for all tables use:

*=*

The maximum number of rows to scan to look for the columns available in a table.

Data Type

int

Default Value

1000

Remarks

The columns in a table must be determined by scanning table rows. This value determines the maximum number of rows that will be scanned.

Setting a high value may decrease performance. Setting a low value may prevent the data type from being determined properly, especially when there is null data.

Specifies the maximum time, in seconds, that the provider waits for a server response before throwing a timeout error.

Data Type

int

Default Value

60

Remarks

The timeout applies to each individual communication with the server rather than the entire query or operation. For example, a query could continue running beyond 60 seconds if each paging call completes within the timeout limit.

Timeout is set to 60 seconds by default. To disable timeouts, set this property to 0.

Disabling the timeout allows operations to run indefinitely until they succeed or fail due to other conditions such as server-side timeouts, network interruptions, or resource limits on the server.

Note: Use this property cautiously to avoid long-running operations that could degrade performance or result in unresponsive behavior.

Determines how to determine the data type of columns.

Possible Values

None, RowScan

Data Type

string

Default Value

"RowScan"

Remarks

None	Setting TypeDetectionScheme to None will return all columns as the string type.
RowScan	Setting TypeDetectionScheme to RowScan will scan rows to heuristically determine the data type. The RowScanDepth determines the number of rows to be scanned.

LZMA from 7Zip LZMA SDK

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Anyone is free to copy, modify, publish, use, compile, sell, or distribute the original LZMA SDK code, either in source code form or as a compiled binary, for any purpose, commercial or non-commercial, and by any means.

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Xamarin.Forms

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