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<p><FONT class=normalfont><B><font color=blue>php中的mysql限制</font></B></FONT><BR><FONT class=smallfont color=#ff9900>2004-04-23 15:18 pm</FONT><BR><FONT class=normalfont>作者：avenger<br>来自：Linux知识宝库<br>联系方式：无名<br><br>今天快被这个问题搞死掉了<br>
公司需要把数据从 MsSQL 转到 MySQL，转过去的数据始终是不完整的。就像被人从中间故意截断的一样。<br>
<br>
先是考虑是 MsSQL 的问题，用它自身的查询分析器查询却没问题。可是用PHP写的脚本来查就有问题。<br>
<br>
通知了我们的网管，检查了半天也没有查出来什么问题。后来忽然间就想到了是不是PHP中的限制。打开PHP.ini，仔细找了一下，果然有类似于下面的一段：<br>
<br>
<br>
[MSSQL]<br>
; Allow or prevent persistent links.<br>
mssql.allow_persistent = On<br>
<br>
; Maximum number of persistent links. -1 means no limit.<br>
mssql.max_persistent = -1<br>
<br>
; Maximum number of links (persistent+non persistent). -1 means no limit.<br>
mssql.max_links = -1<br>
<br>
; Minimum error severity to display.<br>
mssql.min_error_severity = 10<br>
<br>
; Minimum message severity to display.<br>
mssql.min_message_severity = 10<br>
<br>
; Compatability mode with old versions of PHP 3.0.<br>
mssql.compatability_mode = Off<br>
<br>
; Connect timeout<br>
;mssql.connect_timeout = 5<br>
<br>
; Query timeout<br>
;mssql.timeout = 60<br>
<br>
<br>
; Valid range 0 - 2147483647. Default = 4096.<br>
;mssql.textlimit = 4096<br>
<br>
; Valid range 0 - 2147483647. Default = 4096.<br>
;mssql.textsize = 4096<br>
<br>
<br>
; Limits the number of records in each batch. 0 = all records in one batch.<br>
;mssql.batchsize = 0<br>
<br>
; Specify how datetime and datetim4 columns are returned<br>
; On => Returns data converted to SQL server settings<br>
; Off => Returns values as YYYY-MM-DD hh:mm:ss<br>
;mssql.datetimeconvert = On<br>
<br>
; Use NT authentication when connecting to the server<br>
mssql.secure_connection = Off<br>
<br>
; Specify max number of processes. Default = 25<br>
;mssql.max_procs = 25<br>
<br>
罪魁祸首我已经在上边用红色标出来了。索性把它改为最大 2147483647，再次查询后，一切正常。
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