xBase Connector for CData Sync

Build 25.0.9539
  • xBase
    • Establishing a Connection
    • Advanced Features
      • SSL Configuration
      • Firewall and Proxy
      • Data Model
    • Connection String Options
      • Database
        • DataSource
        • IncludeFiles
        • CodePage
      • Logging
        • LogModules
      • Schema
        • Location
        • BrowsableSchemas
        • Tables
        • Views
      • Miscellaneous
        • EmptyStringIsNull
        • ExcludeFileExtensions
        • MaxRows
        • Other
        • PseudoColumns
        • SetExactOn
        • UserDefinedViews
    • Third Party Copyrights

xBase Connector for CData Sync

Overview

The CData Sync App provides a straightforward way to continuously pipeline your xBase data to any database, data lake, or data warehouse, making it easily available for Analytics, Reporting, AI, and Machine Learning.

The xBase connector can be used from the CData Sync application to pull data from xBase and move it to any of the supported destinations.

xBase Version Support

The Sync App enables you to connect with .dbf files including those used in FoxPro 2.6 and Clipper. The Sync App supports the dBase III dialect. The Sync App requires access to a local file folder containing the table files.

xBase Connector for CData Sync

Establishing a Connection

Adding a Connection to xBase

To add a connection to xBase:

  1. In the application console, navigate to the Connections page.
  2. At the Add Connections panel, select the icon for the connection you want to add.
  3. If the xBase icon is not available, click the Add More icon to download and install the xBase connector from the CData site.

For required properties, see the Settings tab.

For connection properties that are not typically required, see the Advanced tab.

The DataSource property must be set to the name of the folder that contains the .dbf files. Specify the IncludeFiles property to work with xBase table files having extensions that differ from .dbf. Specify multiple extensions in a comma-separated list. Specify the CodePage property to set correct encoding for text fields in .dbf tables.

xBase Connector for CData Sync

Advanced Features

This section details a selection of advanced features of the xBase Sync App.

User Defined Views

The Sync App supports the use of user defined views, virtual tables whose contents are decided by a pre-configured user defined query. These views are useful when you cannot directly control queries being issued to the drivers. For an overview of creating and configuring custom views, see User Defined Views .

SSL Configuration

Use SSL Configuration to adjust how Sync App handles TLS/SSL certificate negotiations. You can choose from various certificate formats;. For further information, see the SSLServerCert property under "Connection String Options" .

Firewall and Proxy

Configure the Sync App for compliance with Firewall and Proxy, including Windows proxies and HTTP proxies. You can also set up tunnel connections.

Query Processing

The Sync App offloads as much of the SELECT statement processing as possible to xBase and then processes the rest of the query in memory (client-side).

For further information, see Query Processing.

Logging

For an overview of configuration settings that can be used to refine CData logging, see Logging. Only two connection properties are required for basic logging, but there are numerous features that support more refined logging, which enables you to use the LogModules connection property to specify subsets of information to be logged.

xBase Connector for CData Sync

SSL Configuration

Customizing the SSL Configuration

By default, the Sync App 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.

xBase Connector for CData Sync

Firewall and Proxy

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 Sync App 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.

xBase Connector for CData Sync

Data Model

The Sync App enables you to connect with .dbf files including those used in FoxPro 2.6 and Clipper. The Sync App supports the dBase III dialect. The Sync App requires access to a local file folder containing the table files.

The CData Sync App dynamically obtains the schemas; reconnect to pick up any changes in the metadata, such as added or removed columns or changes in data type.

xBase Connector for CData Sync

Connection String Options

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.

Database


PropertyDescription
DataSourceThe path to the folder containing the .dbf files.
IncludeFilesComma-separated list of file extensions to include into the set of table-content files.
CodePageThe code page to use for decoding character fields.

Logging


PropertyDescription
LogModulesSpecifies the core modules to include in the log file. Use a semicolon-separated list of module names. By default, all modules are logged.

Schema


PropertyDescription
LocationSpecifies the location of a directory containing schema files that define tables, views, and stored procedures. Depending on your service's requirements, this may be expressed as either an absolute path or a relative path.
BrowsableSchemasOptional setting that restricts the schemas reported to a subset of all available schemas. For example, BrowsableSchemas=SchemaA,SchemaB,SchemaC .
TablesOptional setting that restricts the tables reported to a subset of all available tables. For example, Tables=TableA,TableB,TableC .
ViewsOptional setting that restricts the views reported to a subset of the available tables. For example, Views=ViewA,ViewB,ViewC .

Miscellaneous


PropertyDescription
EmptyStringIsNullTells provider to expose empty strings as null values.
ExcludeFileExtensionsSet to true if file extensions should be excluded from table names.
MaxRowsSpecifies the maximum number of rows returned for queries that do not include either aggregation or GROUP BY.
OtherSpecifies advanced connection properties for specialized scenarios. Use this property only under the guidance of our Support team to address specific issues.
PseudoColumnsSpecifies the pseudocolumns to expose as table columns, expressed as a string in the format 'TableName=ColumnName;TableName=ColumnName'.
SetExactOnMimics beahviour of SET EXACT ON mode in Microsoft OLE DB provider.
UserDefinedViewsSpecifies a filepath to a JSON configuration file that defines custom views. The provider automatically detects and uses the views specified in this file.
xBase Connector for CData Sync

Database

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


PropertyDescription
DataSourceThe path to the folder containing the .dbf files.
IncludeFilesComma-separated list of file extensions to include into the set of table-content files.
CodePageThe code page to use for decoding character fields.
xBase Connector for CData Sync

DataSource

The path to the folder containing the .dbf files.

Remarks

The path to the folder containing the .dbf files or files specified in IncludeFiles. If you leave this property blank the property is assigned with a reference to the current directory, "./". The explicit path depends on the environment of the running application.

xBase Connector for CData Sync

IncludeFiles

Comma-separated list of file extensions to include into the set of table-content files.

Remarks

Comma-separated list of file extensions to include into the set of table-content files. Do not list memo-file extensions here. The default is DBF.

xBase Connector for CData Sync

CodePage

The code page to use for decoding character fields.

Remarks

The code page to use for decoding character fields. Default value is UTF8.

xBase Connector for CData Sync

Logging

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


PropertyDescription
LogModulesSpecifies the core modules to include in the log file. Use a semicolon-separated list of module names. By default, all modules are logged.
xBase Connector for CData Sync

LogModules

Specifies the core modules to include in the log file. Use a semicolon-separated list of module names. By default, all modules are logged.

Remarks

The Sync App writes details about each operation it performs into the logfile specified by the Logfile connection property.

Each of these logged operations are assigned to a themed category called a module, and each module has a corresponding short code used to labels individual Sync App operations as belonging to that module.

When this connection property is set to a semicolon-separated list of module codes, only operations belonging to the specified modules are written to the logfile. Note that this only affects which operations are logged moving forward and doesn't retroactively alter the existing contents of the logfile. For example: INFO;EXEC;SSL;META;

By default, logged operations from all modules are included.

You can explicitly exclude a module by prefixing it with a "-". For example: -HTTP

To apply filters to submodules, identify them with the syntax <module name>.<submodule name>. For example, the following value causes the Sync App to only log actions belonging to the HTTP module, and further refines it to exclude actions belonging to the Res submodule of the HTTP module: HTTP;-HTTP.Res

Note that the logfile filtering triggered by the Verbosity connection property takes precedence over the filtering imposed by this connection property. This means that operations of a higher verbosity level than the level specified in the Verbosity connection property are not printed in the logfile, even if they belong to one of the modules specified in this connection property.

The available modules and submodules are:

Module Name Module Description Submodules
INFO General Information. Includes the connection string, product version (build number), and initial connection messages.
  • Connec – Information related to creating or destroying connections.
  • Messag – Generic label for messages pertaining to connections, the connection string, and product version. These messages are typically specific to the Sync App, rather than being received and passed along directly from the service.
EXEC Query Execution. Includes execution messages for user-written SQL queries, parsed SQL queries, and normalized SQL queries. Success/failure messages for queries and query pages appear here as well.
  • Messag – Messages pertaining to query execution. These messages are typically specific to the Sync App, rather than being received and passed along directly from the service.
  • Normlz – Query normalization steps. Query normalization is when the product takes the user-submitted query and rewrites the query to get the same results with optimal performance.
  • Origin – This label applies to any messages recording a user's original query (the exact, unaltered, non-normalized query executed by the user).
  • Page – Messages related to query paging.
  • Parsed – Query parsing steps. Parsing is the process of converting the user-submitted query into a standardized format for easier processing.
HTTP HTTP protocol messages. Includes HTTP requests/responses (including POST messages), as well as Kerberos related messages.
  • KERB – HTTP requests related to Kerberos.
  • Messag – Messages pertaining to HTTP protocols. These messages are typically specific to the Sync App, rather than being received and passed along directly from the service.
  • Unpack – This label applies to messages about zipped data being returned from the service API and unpacked by the product.
  • Res – Messages containing HTTP responses.
  • Req – Messages containing HTTP requests.
WSDL Messages pertaining to the generation of WSDL/XSD files. —
SSL SSL certificate messages.
  • Certif – Messages pertaining to SSL certificates.
AUTH Authentication related failure/success messages.
  • Messag – Messages pertaining to authentication. These messages are typically specific to the Sync App, rather than being received and passed along directly from the service.
  • OAuth – Messages related to OAuth authentication.
  • Krbros – Kerberos-related authentication messages.
SQL Includes SQL transactions, SQL bulk transfer messages, and SQL result set messages.
  • Bulk – Messages pertaining to bulk query execution.
  • Cache – Messages related to reading row data from and writing row data to the product's cache for better performance.
  • Messag – Messages pertaining to SQL transactions. These messages are typically specific to the Sync App, rather than being received and passed along directly from the service.
  • ResSet – Query resultsets.
  • Transc – Messages related to handling transactions, including information about the number of jobs executed and backup table handling.
META Metadata cache and schema messages.
  • Cache – Messages related to reading from and modifying column and table definitions in the product's cache for better performance.
  • Schema – Messages related to retrieving metadata from or modifying the service schema.
  • MemSto – Messages related to writing to or reading from in-memory metadata cache.
  • Storag – Messages relating to storing metadata on disk or in an external data store, rather than in memory.
FUNC Information related to executing SQL functions.
  • Errmsg – Error messages related to executing SQL functions.
TCP Incoming and outgoing raw bytes on TCP transport layer messages.
  • Send – Raw data sent via the TCP protocol.
  • Receiv – Raw data received via the TCP protocol.
FTP Messages pertaining to the File Transfer Protocol.
  • Info – Status messages related to communication in the FTP protocol.
  • Client – Messages related to actions taken by the FTP client (the product) during FTP communication.
  • Server – Messages related to actions taken by the FTP server during FTP communication.
SFTP Messages pertaining to the Secure File Transfer Protocol.
  • Info – Status messages related to communication in the SFTP protocol.
  • To_Server – Messages related to actions taken by the SFTP client (the product) during SFTP communication.
  • From_Server – Messages related to actions taken by the SFTP server during SFTP communication.
POP Messages pertaining to data transferred via the Post Office Protocol.
  • Client – Messages related to actions taken by the POP client (the product) during POP communication.
  • Server – Messages related to actions taken by the POP server during POP communication.
  • Status – Status messages related to communication in the POP protocol.
SMTP Messages pertaining to data transferred via the Simple Mail Transfer Protocol.
  • Client – Messages related to actions taken by the SMTP client (the product) during SMTP communication.
  • Server – Messages related to actions taken by the SMTP server during SMTP communication.
  • Status – Status messages related to communication in the SMTP protocol.
CORE Messages relating to various internal product operations not covered by other modules. —
DEMN Messages related to SQL remoting. —
CLJB Messages about bulk data uploads (cloud job).
  • Commit – Submissions for bulk data uploads.
SRCE Miscellaneous messages produced by the product that don't belong in any other module. —
TRANCE Advanced messages concerning low-level product operations. —

xBase Connector for CData Sync

Schema

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


PropertyDescription
LocationSpecifies the location of a directory containing schema files that define tables, views, and stored procedures. Depending on your service's requirements, this may be expressed as either an absolute path or a relative path.
BrowsableSchemasOptional setting that restricts the schemas reported to a subset of all available schemas. For example, BrowsableSchemas=SchemaA,SchemaB,SchemaC .
TablesOptional setting that restricts the tables reported to a subset of all available tables. For example, Tables=TableA,TableB,TableC .
ViewsOptional setting that restricts the views reported to a subset of the available tables. For example, Views=ViewA,ViewB,ViewC .
xBase Connector for CData Sync

Location

Specifies the location of a directory containing schema files that define tables, views, and stored procedures. Depending on your service's requirements, this may be expressed as either an absolute path or a relative path.

Remarks

The Location property is only needed if you want to either customize definitions (for example, change a column name, ignore a column, etc.) or extend the data model with new tables, views, or stored procedures.

If left unspecified, the default location is %APPDATA%\\CData\\xBase Data Provider\\Schema, where %APPDATA% is set to the user's configuration directory:

Platform %APPDATA%
Windows The value of the APPDATA environment variable
Linux ~/.config

xBase Connector for CData Sync

BrowsableSchemas

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

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.

xBase Connector for CData Sync

Tables

Optional setting that restricts the tables reported to a subset of all available tables. For example, Tables=TableA,TableB,TableC .

Remarks

Listing all available tables from some databases can take extra time, thus degrading performance. Providing a list of tables in the connection string saves time and improves performance.

If there are lots of tables available and you already know which ones you want to work with, you can use this property to restrict your viewing to only those tables. To do this, specify the tables you want in a comma-separated list. Each table should be a valid SQL identifier with any special characters escaped using square brackets, double-quotes or backticks. For example, Tables=TableA,[TableB/WithSlash],WithCatalog.WithSchema.`TableC With Space`.

Note: If you are connecting to a data source with multiple schemas or catalogs, you must specify each table you want to view by its fully qualified name. This avoids ambiguity between tables that may exist in multiple catalogs or schemas.

xBase Connector for CData Sync

Views

Optional setting that restricts the views reported to a subset of the available tables. For example, Views=ViewA,ViewB,ViewC .

Remarks

Listing all available views from some databases can take extra time, thus degrading performance. Providing a list of views in the connection string saves time and improves performance.

If there are lots of views available and you already know which ones you want to work with, you can use this property to restrict your viewing to only those views. To do this, specify the views you want in a comma-separated list. Each view should be a valid SQL identifier with any special characters escaped using square brackets, double-quotes or backticks. For example, Views=ViewA,[ViewB/WithSlash],WithCatalog.WithSchema.`ViewC With Space`.

Note: If you are connecting to a data source with multiple schemas or catalogs, you must specify each view you want to examine by its fully qualified name. This avoids ambiguity between views that may exist in multiple catalogs or schemas.

xBase Connector for CData Sync

Miscellaneous

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


PropertyDescription
EmptyStringIsNullTells provider to expose empty strings as null values.
ExcludeFileExtensionsSet to true if file extensions should be excluded from table names.
MaxRowsSpecifies the maximum number of rows returned for queries that do not include either aggregation or GROUP BY.
OtherSpecifies advanced connection properties for specialized scenarios. Use this property only under the guidance of our Support team to address specific issues.
PseudoColumnsSpecifies the pseudocolumns to expose as table columns, expressed as a string in the format 'TableName=ColumnName;TableName=ColumnName'.
SetExactOnMimics beahviour of SET EXACT ON mode in Microsoft OLE DB provider.
UserDefinedViewsSpecifies a filepath to a JSON configuration file that defines custom views. The provider automatically detects and uses the views specified in this file.
xBase Connector for CData Sync

EmptyStringIsNull

Tells provider to expose empty strings as null values.

Remarks

Tells provider to expose empty strings as null values. Default value is False.

xBase Connector for CData Sync

ExcludeFileExtensions

Set to true if file extensions should be excluded from table names.

Remarks

Set to true if file extensions should be excluded from table names. For example, if set to True, this will make table `users.dbf` appear as `users`.

xBase Connector for CData Sync

MaxRows

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

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.

xBase Connector for CData Sync

Other

Specifies advanced connection properties for specialized scenarios. Use this property only under the guidance of our Support team to address specific issues.

Remarks

This property allows advanced users to configure hidden properties for specialized situations, with the advice of our Support team. These settings are not required for normal use cases but can address unique requirements or provide additional functionality. To define multiple properties, use a semicolon-separated list.

Note: It is strongly recommended to set these properties only when advised by the Support team to address specific scenarios or issues.

Integration and Formatting

PropertyDescription
DefaultColumnSizeSets the default length of string fields when the data source does not provide column length in the metadata. The default value is 2000.
ConvertDateTimeToGMT=TrueConverts date-time values to GMT, instead of the local time of the machine. The default value is False (use local time).
RecordToFile=filenameRecords the underlying socket data transfer to the specified file.

xBase Connector for CData Sync

PseudoColumns

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

Remarks

This property allows you to define which pseudocolumns the Sync App 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:

*=*

xBase Connector for CData Sync

SetExactOn

Mimics beahviour of SET EXACT ON mode in Microsoft OLE DB provider.

Remarks

xBase Connector for CData Sync

UserDefinedViews

Specifies a filepath to a JSON configuration file that defines custom views. The provider automatically detects and uses the views specified in this file.

Remarks

UserDefinedViews allows you to define and manage custom views through a JSON-formatted configuration file called UserDefinedViews.json. These views are automatically recognized by the Sync App and enable you to execute custom SQL queries as if they were standard database views. The JSON file defines each view as a root element with a child element called "query", which contains the SQL query for the view.

For example:

{
	"MyView": {
		"query": "SELECT * FROM Orders WHERE MyColumn = 'value'"
	},
	"MyView2": {
		"query": "SELECT * FROM MyTable WHERE Id IN (1,2,3)"
	}
}

You can use this property to define multiple views in a single file and specify the filepath. For example:

UserDefinedViews=C:\Path\To\UserDefinedViews.json
When you specify a view in UserDefinedViews, the Sync App only sees that view.

For further information, see User Defined Views.

xBase Connector for CData Sync

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7. GENERAL

If any provision of this Agreement is invalid or unenforceable under applicable law, it shall not affect the validity or enforceability of the remainder of the terms of this Agreement, and without further action by the parties hereto, such provision shall be reformed to the minimum extent necessary to make such provision valid and enforceable.

If Recipient institutes patent litigation against a Contributor with respect to a patent applicable to software (including a cross-claim or counterclaim in a lawsuit), then any patent licenses granted by that Contributor to such Recipient under this Agreement shall terminate as of the date such litigation is filed. In addition, if Recipient institutes patent litigation against any entity (including a cross-claim or counterclaim in a lawsuit) alleging that the Program itself (excluding combinations of the Program with other software or hardware) infringes such Recipient's patent(s), then such Recipient's rights granted under Section 2(b) shall terminate as of the date such litigation is filed.

All Recipient's rights under this Agreement shall terminate if it fails to comply with any of the material terms or conditions of this Agreement and does not cure such failure in a reasonable period of time after becoming aware of such noncompliance. If all Recipient's rights under this Agreement terminate, Recipient agrees to cease use and distribution of the Program as soon as reasonably practicable. However, Recipient's obligations under this Agreement and any licenses granted by Recipient relating to the Program shall continue and survive.

Everyone is permitted to copy and distribute copies of this Agreement, but in order to avoid inconsistency the Agreement is copyrighted and may only be modified in the following manner. The Agreement Steward reserves the right to publish new versions (including revisions) of this Agreement from time to time. No one other than the Agreement Steward has the right to modify this Agreement. IBM is the initial Agreement Steward. IBM may assign the responsibility to serve as the Agreement Steward to a suitable separate entity. Each new version of the Agreement will be given a distinguishing version number. The Program (including Contributions) may always be distributed subject to the version of the Agreement under which it was received. In addition, after a new version of the Agreement is published, Contributor may elect to distribute the Program (including its Contributions) under the new version. Except as expressly stated in Sections 2(a) and 2(b) above, Recipient receives no rights or licenses to the intellectual property of any Contributor under this Agreement, whether expressly, by implication, estoppel or otherwise. All rights in the Program not expressly granted under this Agreement are reserved.

This Agreement is governed by the laws of the State of New York and the intellectual property laws of the United States of America. No party to this Agreement will bring a legal action under this Agreement more than one year after the cause of action arose. Each party waives its rights to a jury trial in any resulting litigation.

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