[IMPALA-5527] Create a nested testdata flattener for the query generator

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: Impala 2.10.0
• Fix Version/s: Impala 2.10.0
• Component/s: Infrastructure
• Labels: query_generator_development
• Epic Color: ghx-label-7
• Assignee: Taras Bobrovytsky
• Reporter: Taras Bobrovytsky
• Created: 16/Jun/17 22:26
• Updated: 20/Jun/17 05:06
• Resolved: 20/Jun/17 05:06

Description

In order to use the query generator to test nested types, we need a way to convert a nested dataset into an equivalent flattened one that can be loaded into Postgres. Maps and Arrays should be converted into tables that can be joined with the original table to simulate the nesting.