#31589: Raw queries do not work if any DB content column has the % symbol
-------------------------------------+-------------------------------------
               Reporter:  jotauses   |          Owner:  nobody
                   Type:  Bug        |         Status:  new
              Component:  Database   |        Version:  3.0
  layer (models, ORM)                |
               Severity:  Normal     |       Keywords:  raw query
           Triage Stage:             |      Has patch:  0
  Unreviewed                         |
    Needs documentation:  0          |    Needs tests:  0
Patch needs improvement:  0          |  Easy pickings:  0
                  UI/UX:  0          |
-------------------------------------+-------------------------------------
 **Only fails if any DB content column has the % symbol**.

 {{{
 query_postgresql = """SELECT *, similarity(titulo, '{0}') AS similarity
 FROM pdc_pdc  ORDER BY similarity DESC;"""

 pdc = Pdc.objects.raw(query_postgresql.format(titulo_infocor))
 }}}

 Column "titulo" content = "This is a test 80%".


 Traceback:

 {{{
   File "C:\Users\-----\AppData\Local\Programs\Python\Python38-32\lib\site-
 packages\django\db\backends\utils.py", line 86, in _execute
     return self.cursor.execute(sql, params)
 IndexError: tuple index out of range
 }}}

-- 
Ticket URL: <https://code.djangoproject.com/ticket/31589>
Django <https://code.djangoproject.com/>
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