njayaram2 opened a new pull request #408: DL: Fix predict with 'NULL' string class values URL: https://github.com/apache/madlib/pull/408 JIRA: MADLIB-1357 Fix handling of 'NULL' string for class values in predict. 'NULL' string as a class value was getting reported the same way as a Postgres NULL class value (i.e., empty). This commit double-quotes a 'NULL' string class value in the relevant query. NOTE: In predict, if we use 'prob' as the pred_type, we create a column for each distinct class level. The column name for Postgres NULL class level is 'prob_NULL', and the column name for a 'NULL' string class value will be 'prob_"NULL'.
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