Github user orhankislal commented on a diff in the pull request:
https://github.com/apache/incubator-madlib/pull/108#discussion_r107780437
--- Diff: src/ports/postgres/modules/utilities/pivot.sql_in ---
@@ -127,6 +134,18 @@ pivot(
a dictionary output file will be created and a message given to the
user.
</dd>
+ <dt>output_type (optional)</dt>
+ <dd>VARCHAR. default: 'column'. This parameter controls the output
format
+ of the pivoted variables. If 'column', a column is created for each
pivot
+ variable. PostgreSQL limits the number of columns in a table.
--- End diff --
Maybe we should suggest a number for the user to start considering this
option.
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