Some server management function in Advantage Database Server require the physical file name of the table including the local path. One example could be to get all users of a specific table so you can disconnect them if you require exclusive table access for table maintenance. Unfortunately there’s nothing built into the server. Calling the function database() in SQL just returns the connection path from the client and not the server path. Weiterlesen
Schlagwort: SQL
I’m currently attending the online lecture ‚in memory computing‘ by http://openhpi.com. One of the founders of SAP, Hasso Plattner, stated that they use insert only approach to keep a history of the record in the table. Since only ~10% of the records get updated during lifetime, there should be no performance penalty being expected.
I was very curious if this is possible with ADS aswell and implemented it using triggers. Weiterlesen
Recently there has been a posting in the Advantage newsgroups (http://devzone.advantagedatabase.com/forum/questions/2339/any-similar-command-with-mysql-load-command-in-ads) that inspired me to write this blog post. A user asked on how he could load from a text file. Weiterlesen
To all my english fellows: Since the topic discussed in this article is for the german language only I’ll post it in german language. Sorry.
Zur Ähnlichkeitssuche von Zeichenketten existieren mehrere Verfahren. Das bekannteste ist wohl Soundex, welches unter anderem auch im Advantage Database Server als Funktion implementiert ist (Online-Hilfe in der Advantage Devzone). Ein weiteres Verfahren wäre die Distanz (zB Levenstein-Distanz) zwischen zwei Zeichenketten zu messen, um so eine Ähnlichkeit festzustellen. Beide Verfahren sind aber für die deutsche Sprache wenig geeignet: Soundex ist für englisch optimiert, Levenstein würde zwei so unterschiedlich klingende Worte wie „Tier“ und „Tor“ als 2 angeben, was quasi einer Übereinstimmung entspricht.
Bereits 1969 veröffentlichte Hans Joachim Postel die „Kölner Phonetik“. Weiterlesen
With the release of Advantage Database Server 10 back in 2010 the API for 64Bit clients was added. The latest patches (10.10.0.28) now also supports Delphi XE2 and with that Delphi developers can write Advantage Extended Procedures (AEP) for 64Bit Servers aswell. Weiterlesen
I was asked by a partner how he could adjust his table structure. He needed to check if a char field is available and adjust its size to a minimum of 40 characters. So I came up with this script: Weiterlesen