需要幫助執行

Question

我使用Ubuntu的Basex 8.0測試版從basex獨立的XQuery 14.04

我的數據庫中包含的XML文檔與這個樣子

<messages> 
    <message>  
    <message-time-stamp> 
     <date>20141004</date> 
     <time>193843</time> 
     <utc-offset>-0400</utc-offset> 
    </message-time-stamp> 
    </message> 
</messages> 

我可以使用元素BaseX gui中的以下xquery使用級聯時間戳更新所有消息時間戳記節點

declare variable $data := db:open('testdb'); 

    (: Find all elements with time and return the parent element :) 
    for $n in $data//../time/.. 
    return (
    if (exists($n/utc-time-stamp)) then() 
    else insert node 
    <utc-time-stamp> 
    {fn:concat (
     fn:substring($n/date, 1, 4),"-", 
     fn:substring($n/date, 5, 2),"-", 
     fn:substring($n/date, 7, 2),"T", 
     fn:substring($n/time, 1, 2),":", 
     fn:substring($n/time, 3, 2),":", 
     fn:substring($n/time, 5, 2), 
     fn:substring($n/utc-offset, 1, 3), 
     fn:substring($n/utc-offset, 4, 2))} 
    </utc-time-stamp> into $n 
) 

我在basex腳本test_bxs.xqy嵌入查詢，如下所示：

<commands> 
    <xquery> 
    declare variable $data := db:open('testdb'); 
    (: Find all elements with time and return the parent element :) 
    for $n in $data//../time/.. 
    return (
    if (exists($n/utc-time-stamp)) then() 
    else insert node 
    <utc-time-stamp> 
    {fn:concat (
     fn:substring($n/date, 1, 4),"-", 
     fn:substring($n/date, 5, 2),"-", 
     fn:substring($n/date, 7, 2),"T", 
     fn:substring($n/time, 1, 2),":", 
     fn:substring($n/time, 3, 2),":", 
     fn:substring($n/time, 5, 2), 
     fn:substring($n/utc-offset, 1, 3), 
     fn:substring($n/utc-offset, 4, 2))} 
    </utc-time-stamp> into $n 
) 
    </xquery> 
</commands> 

，並執行如下：

$ basex -d -c test_bxs.xqy 
org.basex.query.QueryException: Syntax: <xquery>[query]</xquery> 
     at org.basex.core.parse.XMLParser.error(XMLParser.java:323) 
     at org.basex.core.parse.XMLParser.check(XMLParser.java:313) 
     at org.basex.core.parse.XMLParser.command(XMLParser.java:167) 
     at org.basex.core.parse.XMLParser.parse(XMLParser.java:47) 
     at org.basex.core.parse.CmdParser.parse(CmdParser.java:57) 
     at org.basex.core.parse.CommandParser.parse(CommandParser.java:75) 
     at org.basex.core.parse.CommandParser.parse(CommandParser.java:54) 
     at org.basex.core.CLI.execute(CLI.java:88) 
     at org.basex.core.CLI.execute(CLI.java:77) 
     at org.basex.BaseX.<init>(BaseX.java:85) 
     at org.basex.BaseX.main(BaseX.java:42) 
org.basex.core.BaseXException: Syntax: <xquery>[query]</xquery> 
     at org.basex.core.CLI.execute(CLI.java:93) 
     at org.basex.core.CLI.execute(CLI.java:77) 
     at org.basex.BaseX.<init>(BaseX.java:85) 
     at org.basex.BaseX.main(BaseX.java:42) 
Caused by: org.basex.query.QueryException: Syntax: <xquery>[query]</xquery> 
     at org.basex.core.parse.XMLParser.error(XMLParser.java:323) 
     at org.basex.core.parse.XMLParser.check(XMLParser.java:313) 
     at org.basex.core.parse.XMLParser.command(XMLParser.java:167) 
     at org.basex.core.parse.XMLParser.parse(XMLParser.java:47) 
     at org.basex.core.parse.CmdParser.parse(CmdParser.java:57) 
     at org.basex.core.parse.CommandParser.parse(CommandParser.java:75) 
     at org.basex.core.parse.CommandParser.parse(CommandParser.java:54) 
     at org.basex.core.CLI.execute(CLI.java:88) 
     ... 3 more 
Syntax: <xquery>[query]</xquery> 

如果我刪除插入語句並插入一個db：output（「。」），腳本可以在命令行中正常運行，但是co urse不更新數據庫。

<commands> 
    <xquery> 
    declare variable $data := db:open('testdb'); 
    (: Find all elements with time and return the parent element :) 
    for $n in $data//../time/.. 
    return (
    if (exists($n/utc-time-stamp)) then (db:output(".")) 
    else (db:output(".")) 
) 
    </xquery> 
</commands> 

由於腳本作爲預期在GUI中進行，從命令行上使用時，我期望類似的結果。

任何幫助，將不勝感激提前

感謝

Answer 1

BaseX命令腳本應該總是有.bxs文件結尾爲outlined in the documentation。

您的方法失敗的原因是在XML命令腳本中不能使用XML元素，因爲腳本語言本身由XML元素組成。但是，因爲它似乎你只需要執行您的XQuery文件，所以簡單地存儲的XQuery本身（即沒有周圍的命令和它的元素）的文件，並

basex test_bxs.xqy 

假設您覆蓋現有的文件中運行它。