What is wrong with the following SQL query on my data? I found pretty clear documentation (1,2) that the function is supposed to work.

SELECT CDB_QuantileBins(array_agg(numeric_column_of_mine), 10) from my_table
  • What is the exact text of the error message? Is the extension associated with this function installed in your database? Show the output of \df *.CDB_QuantileBins in psql. Mention any relevant versions. Please edit your question, comment here when done. – Craig Ringer Apr 3 '14 at 23:24
  • @CraigRinger I am not following, sorry. Can I query this (df) in the web interface as well? How exactly, sorry. But no, I did not install any extension, I thought this must work out-of-the box on the site. – László Apr 3 '14 at 23:35
  • 1
    Ah, you're using a PostgreSQL fork or some kind of canned service/extension (cartodb). Didn't spot that right away. Never mind. You should still show the exact text of the error message though. – Craig Ringer Apr 4 '14 at 1:35

There seems to be a type inflexiblity in the function. Try this,

SELECT CDB_QuantileBins(array_agg(numeric_column_of_mine::numeric), 10) FROM my_table

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