Perfect, thank you Mike.
Best regards,
Matthew
On Wednesday, October 5, 2022 at 11:51:39 AM UTC-7 Mike Bayer wrote:
> Select does not have a hook for that particular spot in the SQL
> compilation, so unless you rewrote all of visit_select, your best bet is to
> stick with simple string replacement.
>
> this does not in any way preclude you from using the compiler extension,
> get the text from the compiler then do the process
>
> import re
> from sqlalchemy import column
> from sqlalchemy import select
> from sqlalchemy import table
> from sqlalchemy.ext.compiler import compiles
> from sqlalchemy.sql.expression import Select
>
>
> @compiles(Select)
> def _compile(element, compiler, **kw):
> text = compiler.visit_select(element, **kw)
> match = re.search(r"BULK COLLECT INTO (.*)", text)
> if match:
> text = re.sub(r"BULK COLLECT INTO (.*)", "", text)
> text = text.replace("FROM", f"BULK COLLECT INTO {match.group(1)}
> FROM")
> return text
>
> baz = table('baz', column('foo'), column('bar'))
>
> stmt = select(baz).with_statement_hint("BULK COLLECT INTO I_foos")
> print(stmt)
>
>
>
>
> On Wed, Oct 5, 2022, at 2:21 PM, [email protected] wrote:
>
> Hello,
>
> I am generating Oracle PLSQL using sqlalchemy core.
>
> I would like to generate the following output:
>
> SELECT foo, bar
> BULK COLLECT INTO l_foos
> FROM baz;
>
> Is there a mechanism to insert a string after the select column list and
> before the FROM?
>
> In sql/compiler.py:visit_select (
> https://github.com/zzzeek/sqlalchemy/blob/master/lib/sqlalchemy/sql/compiler.py#L3188)
>
> I do not see a way to hook into this specific spot via compiler
> customizations, unless I am missing something.
>
> I suppose I can simply do `query_str.replace('FROM', 'BULK COLLECT INTO
> l_foos FROM', 1) but I was hoping to make a nice API via a compiler
> customization.
>
> Thanks and best regards,
>
> Matthew
>
>
>
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> The Python SQL Toolkit and Object Relational Mapper
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