Details
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Bug
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Status: Resolved
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Major
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Resolution: Fixed
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1.12.0
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None
Description
It would be useful to have pushdown occur past flatten(project). Here is an example to illustrate the issue:
explain plan without implementation for }}{{select name, flatten(categories) as category from dfs.`/tmp/t_json_20` LIMIT 1;
DrillScreenRel{{ }}
DrillLimitRel(fetch=[1]){{ }}
DrillProjectRel(name=[$0], category=[FLATTEN($1)])
DrillScanRel(table=[[dfs, /tmp/t_json_20]], groupscan=[EasyGroupScan [selectionRoot=maprfs:/tmp/t_json_20, numFiles=1, columns=[`name`, `categories`], files=[maprfs:///tmp/t_json_20/0_0_0.json]]])
=================================================================
Content of 0_0_0.json
=================================================================
{ "name" : "Eric Goldberg, MD", "categories" : [ "Doctors", "Health & Medical" ] } { "name" : "Pine Cone Restaurant", "categories" : [ "Restaurants" ] } { "name" : "Deforest Family Restaurant", "categories" : [ "American (Traditional)", "Restaurants" ] } { "name" : "Culver's", "categories" : [ "Food", "Ice Cream & Frozen Yogurt", "Fast Food", "Restaurants" ] } { "name" : "Chang Jiang Chinese Kitchen", "categories" : [ "Chinese", "Restaurants" ] }
