Philip, Igor Why is ExtractValue() not allowed for a virtual column?
Why can't I do this: CREATE TABLE sbtest ( id INTEGER UNSIGNED NOT NULL AUTO_INCREMENT, doc TEXT, username varchar(10) as (ExtractValue(doc, '/user/username')) virtual, PRIMARY KEY (id), ) ...but can do this: CREATE TABLE sbtest ( id INTEGER UNSIGNED NOT NULL AUTO_INCREMENT, doc TEXT, username varchar(10) as (ExtractValue(doc, '/user/username')) virtual, PRIMARY KEY (id) ) (Just for fun, imagine "doc" containing an xml document like <user> <id>1</id> <username>hingo</username> <name>Henrik Ingo</name> <status time="2010-21-10 13:16">I'm writing an example XML document</status> <friends> <friend_id>9</friend_id> <friend_id>91</friend_id> <friend_id>92</friend_id> <friend_id>93</friend_id> <friend_id>94</friend_id> <friend_id>95</friend_id> <friend_id>96</friend_id> <friend_id>97</friend_id> <friend_id>98</friend_id> <friend_id>99</friend_id> </friend> </user> ) I don't see ExtractValue being in any way undeterministic or anything. henrik -- henrik.i...@avoinelama.fi +358-40-5697354 www.openlife.cc _______________________________________________ Mailing list: https://launchpad.net/~maria-developers Post to : maria-developers@lists.launchpad.net Unsubscribe : https://launchpad.net/~maria-developers More help : https://help.launchpad.net/ListHelp
