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<p class="MsoNormal">Hi All,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">II 11.0.0 (a64.lnx/100) + p15426<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">It appears the first N feature isn’t working with windowing functions like row_number() over ()<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">This query was supposed to select the first 1000 rows from the derived table …so 12050912 was a bit of a shock.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span style="font-family:"Courier New"">DECLARE GLOBAL TEMPORARY TABLE session.my_gp_clinical_p1 AS<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Courier New"">SELECT <span style="background:yellow;mso-highlight:yellow">
FIRST 1000 s.*</span> FROM (<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Courier New""> SELECT *,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Courier New""> row_number() over (<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Courier New""> partition by reg_id, data_provider, event_dt, read_2, read_3, map_icd10, value1, value2, value3<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Courier New""> ) as row_number<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Courier New""> FROM actual_gp_clinical<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Courier New""> WHERE mod(reg_id, 10) = 0<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Courier New""> ) s<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Courier New"">WHERE s.row_number = 1<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Courier New"">ON COMMIT PRESERVE ROWS WITH NORECOVERY, PAGE_SIZE = 32768<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Courier New"">Executing . . .<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Courier New""><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Courier New"">(12050912 rows in 452.269470 secs)<o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Martin Bowes<o:p></o:p></p>
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