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[Kristina Hoeppner <1700893@xxxxxxxxxxxxxxxxxx>]

Mahara 17.04 requires Postgres 9.1 at minimum. Please upgrade. The
Readme file has been fixed to mention the correct version (to be pushed
out with next minor point release).

** Changed in: mahara
       Status: New => Invalid

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https://bugs.launchpad.net/bugs/1700893

Title:
  Upgrade to 17.04 fails on Postgres 8

Status in Mahara:
  Invalid

Bug description:
  Me again (https://bugs.launchpad.net/mahara/+bug/1517658).

  Upgrading from 15.10.1 to mahara-17.04.2. (Postgres 8.4.)
  Running upgrade.php, auth.webservice step results in "Failed to upgrade."

  Apache error Log (xxxx = redacted):
  ----------------------------------
  xxxx [DBG] da (lib/dml.php:157) postgres8 error: [-1: ERROR:  function left(character varying, integer) does not exist at character 73, referer: xxxx
  xxxx [DBG] da (lib/dml.php:157) HINT:  No function matches the given name and argument types. You might need to add explicit type casts.] in adodb_throw(UPDATE "external_functions", referer: xxxx
  ----------------------------------

  Looks like it's here:
  auth/webservice/db/upgrade.php:518
  --------------------------------------------------
  execute_sql(
              "UPDATE {external_functions}
              SET
                  component = LEFT(
                      component,
                      LENGTH(component) - {$length}
                  )
              WHERE
                  component <> 'webservice'
                  AND RIGHT(
                      component,
                      {$length}
                  ) = '{$oldtail}'
              "
          );
  --------------------------------------------------

  Apparently functions left() and right() appeared in pg 9.3.

  Is there a workaround for this on pg8?

  Cheers,
  Marcus

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