Postgres Plus® All FAQ | Enterprise. DBWhat hardware and operating system platforms do Postgres servers support? All hardware / operating system platform support for EDB Postgres products can be found on the Postgres Advanced Server Lifecycles page or the Postgres Standard Server Lifecycles page. What are the maximum sizes/capacities of a Postgres Advanced Server database? E. g. Maximum table size, etc? Maximum Database Size is Unlimited. Maximum Table Size is 3. Tera. Bytes (TB)Maximum Row Size is 1. TBMaximum Field Size is 1 GBMaximum Rows per Table is Unlimited. Maximum Columns per Table is 2. Maximum Indexes per Table is Unlimited. What is Postgre. SQL? Postgre. SQL is a powerful, open source relational database system. It has been in active development since 1. IBM System R research and designed to solve the same problems as databases like Oracle and DB2. Why Use SimbaEngine X for ODBC & JDBC Driver Development? Easy to Use: Develop a driver in just five days. Reduce time to market, development costs, and uncertainty by building your driver on a solid foundation. Proven: Simba. Q. What does XL stand for? XL is short for eXtensible Lattice. It also connotes an extra large version of PostgreSQL, in this case across multiple systems. Q. Is this a “NoSQL” solution? No, Postgres-XL supports. PsqlODBC FAQ. Current maintainer: Dave Page ([email protected]) The most recent version of this document can be viewed at https://odbc.postgresql.org/faq.html. What hardware and operating system platforms do Postgres servers support? All hardware / operating system platform support for EDB Postgres products can be found on the Postgres Advanced Server Lifecycles page or the Postgres. Postgre. SQL has proven extensibel architecture that has earned it a strong reputation for innovation, reliability, data integrity, and correctness. It is fully ACID compliant, has full support for foreign keys, joins, views, triggers, and stored procedures (in multiple languages).
ODBC (Open Data Base Connectivity) is an interface to access databases via SQL queries. ODBC can be used as an access tool to various databases such as MS. Here is one other point about Access and ODBC linked booleans: It seems that access sees ODBC nulls as false. When Access tries to update a field with a boolean null, the update will fail since ACCESS uses all of the table's. The unixODBC Project home page Do you support unixODBC? We are compiling a directory of applications, languages and databases which support unixODBC. If you would like your products included please let meknow. What is the. An enterprise class database, Postgre. SQL boasts sophisticated features such as Multi- Version Concurrency Control (MVCC), point in time recovery (PITR), tablespaces, synchronous/asynchronous replication, nested transactions (savepoints), online/hot backups, a sophisticated query planner/optimizer, and write ahead logging for fault tolerance. It supports international character sets, multi- byte character encodings, Unicode, and it is locale- aware for sorting, case- sensitivity, and formatting. It is highly scalable both in the sheer quantity of data it can manage and in the number of concurrent users it can accommodate. There are active Postgre. SQL systems in production environments that manage in excess of 4 terabytes of data. What is Postgres Advanced Server? Postgres Advanced Server is an enterprise- class relational database management system (RDBMS) built upon Postgre. SQL with added enterprise features for performance, security, developer tools, dba tools and compatibility for Oracle®. This means that many applications written for Oracle run on Postgres Advanced Server without modification and Oracle- skilled developers can use it with minimal re- training. This enterprise feature set and open source heritage allows organization to replace traditional expensive databases with a much lower cost and capable alternative and divert the cost savings to new applications of innovation and customer engagement. What is the difference between Postgre. PostgreSQL ODBC problems. PostgreSQL is yet another open source RDBMS having a proven track record in the industry. Following section discusses how to use PostgreSQL with WinSQL. Download and installation. Binaries for Windows. SQL and Postgres Advanced Server? Enterprise. DB adds additional functionality and capabilities to Advanced Server in the following areas: Security. Performance. Productivity Tools for Develoeprs. Productivity Tools for DBAs. Compatibility for Oracle. For details see the comparison table here. Does Postgres Advanced Server support XML data types? Yes. Does Postgres Advanced Server support LOBs? Yes, both blobs and clobs are supported. Does Postgres Advanced Server support Varrays and table collections? Yes, Postgres Advanced Server supports table collections and Varrays. Does Postgres Advanced Server support Text data, indexing and searching? Yes, Postgres servers have Full Text Search capabilities. The tsearch. 2 module provides backwards- compatible text search functionality for applications that used contrib/tsearch. Postgre. SQL in release 8. There is no extra cost for Full Text Search. Does Postgres Advanced Server support Partitioning? Yes, it is a fundamental feature of the database and supports Range, List, and Hash partitioning using Oracle compatible syntax. What type of locking model does Postgres Advanced Server have? Postgres Advanced Server uses Row Level locking with non- escalating locks. What isolation level(s) does Postgres Advanced Server support? Read Committed by default. We can also support Repeatable Read and Serializable. Does Postgres Advanced Server support Spatial / Geo. Spatial data? Yes via the free open source Post. GIS plug- in. Post. GIS adds support for geographic objects to the Postgres Advanced Server /Postgre. SQL object- relational database. In effect, Post. GIS "spatially enables" the Postgres Advanced Server /Postgre. SQL server, allowing it to be used as a backend spatial database for geographic information systems (GIS). What is Replication? Replication is the process by which transactions that occur on one database system are repeated on a second (or third or fourth..) system to keep two versions of that table/data in sync. There are two forms of replication: a) Trigger based and Log based. In trigger based replication, some form of a database trigger (usually built into the kernel for performance reasons) fires and puts the changed data in a log table where it awaits being published to other databases that want a copy of that data. With log based replication, a process mines the transaction logs of the database and records the appropriate changes in a log table where it is published or pushed down to destination databases. The destination databases either have the data sent to them or they pull it off the log table and apply it to their copy of the tables. When is replication used/recommended? Replication is commonly used to keep copies of reference data synchronized at multiple sites. This reference data is relatively static but is needed by the application/users that access the database at various remote locations, i. United States, one in the UK and another in Asia. Each location needs a copy of the reference data to support their local operations. Another use of replication is to offload reporting from a production OLTP system to a second system. This prevents transaction oriented and query oriented processes from competing for resources and degrading performance as well as allowing each system to be optimally tuned for their different workloads. Finally, replication is an important component of Highly Available database systems. What type of replication does Postgres Advanced Server support? Postgres Advanced Server supports native binary replication. Advanced Server also includes a trigger based replication solution (x. DB Replication Server) that moves data between Advanced Server, Oracle, Postgre. SQL, and Microsoft SQL Server databases. Does Advanced Server have synchronous replication? Yes. What is Oracle RAC? Oracle RAC, a. k. Real Application Clusters, is Oracle's cluster solution for high availability, scalability and performance. It is based on a shared everything architecture. While the name implies that it works for any or all real applications, that is not always the case. Applications can experience severe performance and scalability problems if not designed to be 'RAC- aware'. This is due to the limitations of a shared everything architecture. Does Postgres Advanced Server support RAC? No. RAC is based on a shared everything architecture whereas Postgres Advanced Server is based on a shared nothing architecture. However, Oracle customers use RAC for many different capabilities that RAC provides and many of those capabilities can be provided by Postgres Advanced Server and its tools for performance, availability, and scalability. An in depth discussion with an EDB Sales Engineer can help determine your use of RAC can be replaced by Advanced Server. Does Postgres Advanced Server support clustered databases? Yes. Postgres Advanced Server supports and is deployed in clustered configurations at many customers. Clustering software such as Linux- HA or Red Hat Cluster Suite is necessary to setup this Active/Passive cluster. What high availability (HA) solutions does Postgres Advanced Server support? Postgres Advanced Server supports the following HA solutions: EDB Postgres Failover Manager. Active/Passive clustering requiring clusterware like Linux- HA or Red Hat Cluster Server. Hot Standby database for Disaster Recovery. Replication. What is EDB Postgres Failover Manager? Failover Manager creates fault tolerant clusters minimizing database downtime with health monitoring, failure detection/notification, and automatic failover required in various 9s based high availability solutions. A simple and lightweight architecture protects against a variety of failure scenarios that can be customized to specific application needs. Failover Manager is included in EDB Postgres Enterprise and Standard subscriptions. What is Linux- HA? Linux- HA is clusterware that provides and an Active/Passive architecture solution for Postgres Advanced Server. Linux- HA provides death- of- node detection, communications between the nodes, and cluster management. Linux- HA provides sophisticated high- availability (failover) capabilities on a wide range of platforms, supporting several tens of thousands of mission critical sites all over the globe. What is Red Hat Cluster? This is Red Hat's version of clusterware (see Linux- HA above). What is Veritas Cluster (see Linux- HA above)? This is Veritas' version of clusterware. Does Postgres Advanced Server support connection pooling? Yes via pgpool which is a connection pooling/caching mechanism for Postgre. SQL and Postgres Advanced Server. What is pgpool? Postgre. SQL based databases. Postgres clients (front ends) and servers (back ends) and caches a collection of established connections to the database so clients can connect quickly improving performance. A Postgres client connects to pgpool as if it were a standard Postgres Advanced Server. Does Postgres Advanced Server support/have a Data Guard feature? Yes. Postgres Advanced Server supports standby databases like Oracle's Data Guard. It is possible to have either a physical standby db, i. Does Postgres Advanced Server have a logical standby database feature? Yes, via the hot standby mode of the Streaming Replication feature. This allows the standby database to be open for read only access while it is being kept in synch with the primary database. Does Postgres Advanced Server support online backups, a. ODBC (Open Database Connectivity)ODBC (Open Data Base Connectivity) is an interface to access databases via SQL queries. ODBC can be used as an access tool to various databases such as MS- Access, d. Base, DB2, Excel, and Text. Through these Call Level Interface (CLI) specifications of the SQL Access Group, the OBDC allows a neutral way of accessing the data stored in personal computers and various databases. It was first created by Microsoft and Simba Technologies. ODBC 1. 0 was initially released in September 1. SQL standard in 1. Microsoft originally shipped the ODBCs as a set of DLLs and still today, ships the set with every copy of Microsoft Windows. Today, more and more operating systems such as Unix and Apple are adopting the ODBC. The strength of ODBC is that by providing a universal data access interface, it allows independent software companies and parties to not have to learn multiple application programming interfaces. To simply put, with ODBC, applications can simultaneously access, view, and modify database from numerous and quite diverse databases. This is because the ODBC “re- codes” the SQL queries so that it would be readable by the various different databases. However, the ODBC also has its drawbacks. As managing a huge number of ODBC clients can mean an immense amount of drivers and DLLs being run, this could lead to a system administration overhead. Nonetheless, this minor issue led to further uses of the ODBC server technology (or the “Multi- Tier ODBC Drivers”) to alleviate the load. Also, as drivers are a key in ODBCs, some have raised the issue of the newer drivers’ stability, as often many have shown to have bugs in them. How ODBC is Processed. To use the ODBC, three components are needed: ODBC client, ODBC driver, and a DBMS server (ex. Microsoft Access, SQL Server, Oracle, and Fox. Pro). Firstly, the ODBC client will use a command (referred to as “ODBC”) to interact (requesting and/or sending data) with the DBMS server (back- end). However, the DBMS server will not understand the command by the ODBC client yet, as the command has yet to be processed through the ODBC driver (front- end). So then, the ODBC driver will decode the command that can be processed by the ODBC server and be sent there. The ODBC server will then respond back to the ODBC driver which will translate the final output to the ODBC client. ODBC Drivers. ODBC drivers are specific to each type of database. Where to Get an Oracle ODBC Driver. The Oracle ODBC Drivers Download Page is the source for official Oracle ODBC drivers. The Easysoft ODBC Oracle Driver improves on the stock Oracle ODBC drivers by providing improved performance and easier maintenance. Open. Link Software provides both Single- Tier and Multi- Tier Oracle ODBC drivers. Attunity provides a data adapter which includes an Oracle ODBC driver. Where to Get a My. SQL ODBC Driver. My. SQL Connector/ODBC is the official My. SQL ODBC driver. Open. Link Software provides both Single- Tier and Multi- Tier My. SQL ODBC drivers. Sources for Other ODBC Drivers. To search for an ODBC driver for another database, check the unix. ODBC list of ODBC drivers which work with unix. ODBC. ODBC Driver Managers. The two main ODBC driver managers for Unix are i. ODBC and unix. ODBC. ODBC (Independent Open Data. Base Connectivity) is an Open Source platform independent implementation of both the ODBC and X/Open specifications. ODBC provides both an ODBC driver manager and an SDK that facilitates the development of database- independent applications. ODBC includes a GTK+- based administration tool. ODBC has been ported to numerous platforms, including: Linux (x. Itanium, Alpha, Mips, and Strong. Arm), Solaris (Sparc & x. AIX, HP- UX (PA- RISC & Itanium), Digital UNIX, Dynix, Generic Unix 5. Free. BSD, Mac. OS 9, Mac. OS X, DG- UX, and Open. VMS. unix. ODBC provides Unix applications with the same ODBC 3. API and facilities available under Windows. ODBC provides a Driver Manager that supports the full ODBC API and performs the ODBC 3 to ODBC 2 translations with UNICODE to ANSI conversion. ODBC also includes a set of graphical utilities that allow users to specify connections to DBMSes to be used by applications, a collection of ODBC drivers including a simple text based driver, an NNTP driver, a Postgres driver and others, and a selection of templates and libraries that to aid in the construction of ODBC drivers. ODBC works with My. SQL, Postgres, Star. Office/Open. Office, Applixware, i. HTML, PHP, Perl DBD: :ODBC, and many other applications and drivers. Connection pooling is also provided to increase performance with applications such as PHP. ODBC includes a QT- based administration GUI.
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