| From: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
|---|---|
| To: | Peter Eisentraut <peter_e(at)gmx(dot)net> |
| Cc: | pgsql-hackers(at)postgreSQL(dot)org |
| Subject: | Re: Precedence of standard comparison operators |
| Date: | 2015-02-21 23:59:04 |
| Message-ID: | 13885.1424563144@sss.pgh.pa.us |
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| Lists: | pgsql-hackers |
Attached is a draft patch to bring the precedence of comparison operators
and IS tests into line with the SQL standard. I have not yet looked into
producing warnings for changes in parsing decisions; but I was gratified
to discover that this patch results in none, nada, zero changes in any
of our regression tests. So that's at least some evidence that it may
not be a huge problem in practice. Pending writing some code for warnings,
I thought I'd throw this up in case anyone wants to try it on applications
they have handy.
Credit where credit is due dept: this is mostly the work of Serge Rielau
of Salesforce.
regards, tom lane
| Attachment | Content-Type | Size |
|---|---|---|
| change-operator-precedence-0.1.patch | text/x-diff | 10.0 KB |
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