replace_matches does not return {null} - Mailing list pgsql-sql
| From | Andreas Gaab |
|---|---|
| Subject | replace_matches does not return {null} |
| Date | |
| Msg-id | 48DA836F3865C54B8FBF424A3B775AF6671A68395D@Exchange-Server Whole thread Raw |
| Responses |
Re: replace_matches does not return {null}
(Tom Lane <tgl@sss.pgh.pa.us>)
|
| List | pgsql-sql |
<div class="WordSection1"><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Times New
Roman","serif"">Hi,</span><pclass="MsoNormal"><span style="font-size:11.0pt;font-family:"Times New
Roman","serif""> </span><pclass="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Times New
Roman","serif"">Itried to order a text-column only by parts of the entries. Therefore I used regexp_matches(), but
unfortunatelyI am loosing rows.</span><p class="MsoNormal"><span lang="EN-US"
style="font-size:11.0pt;font-family:"TimesNew Roman","serif""> </span><p class="MsoNormal"><span lang="EN-US"
style="font-size:11.0pt;font-family:"TimesNew Roman","serif"">SELECT regexp_matches('abc','[0-9]+'),
regexp_matches('123','[0-9]+');</span><pclass="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Times
NewRoman","serif""> </span><p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Times New
Roman","serif"">Doesnot return “{null}, {123}” but no result at all.</span><p class="MsoNormal"><span lang="EN-US"
style="font-size:11.0pt;font-family:"TimesNew Roman","serif""> </span><p class="MsoNormal"><span lang="EN-US"
style="font-size:11.0pt;font-family:"TimesNew Roman","serif"">Is this behavior expected? How can I work
around?</span><pclass="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Times New
Roman","serif""> </span><pclass="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Times New
Roman","serif"">Iam running postgres 8.4</span><p class="MsoNormal"><span lang="EN-US"
style="font-size:11.0pt;font-family:"TimesNew Roman","serif""> </span><p class="MsoNormal"><span lang="EN-US"
style="font-size:11.0pt;font-family:"TimesNew Roman","serif""> </span><p class="MsoNormal"><span lang="EN-US"
style="font-size:11.0pt;font-family:"TimesNew Roman","serif"">Andreas</span><p class="MsoNormal"><span lang="EN-US"
style="font-size:11.0pt;font-family:"TimesNew Roman","serif""> </span><p class="MsoNormal"><span lang="EN-US"
style="font-size:11.0pt;font-family:"TimesNew Roman","serif""> </span><p class="MsoNormal"><span
style="font-size:10.0pt">___________________________________________________________________________</span><p
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