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Khurram Faraaz edited comment on DRILL-3562 at 3/31/17 9:32 AM: ---------------------------------------------------------------- [~arina] thanks for confirming. Verified that SQL reported in this JIRA returns correct results on Drill 1.11.0 Test added here framework/resources/Functional/json/json_storage/drill_3562.q {noformat} 0: jdbc:drill:schema=dfs.tmp> select count(*) from (select FLATTEN(t.a.b.c) AS c from `empty_array.json` t) flat WHERE flat.c.d.e = 'f' ; +---------+ | EXPR$0 | +---------+ | 1 | +---------+ 1 row selected (0.241 seconds) {noformat} was (Author: khfaraaz): [~arina] thanks for confirming. Verified that SQL reported in this JIRA returns correct results on Drill 1.10.0 Test added here framework/resources/Functional/json/json_storage/drill_3562.q {noformat} 0: jdbc:drill:schema=dfs.tmp> select count(*) from (select FLATTEN(t.a.b.c) AS c from `empty_array.json` t) flat WHERE flat.c.d.e = 'f' ; +---------+ | EXPR$0 | +---------+ | 1 | +---------+ 1 row selected (0.241 seconds) {noformat} > Query fails when using flatten on JSON data where some documents have an > empty array > ------------------------------------------------------------------------------------ > > Key: DRILL-3562 > URL: https://issues.apache.org/jira/browse/DRILL-3562 > Project: Apache Drill > Issue Type: Bug > Components: Storage - JSON > Affects Versions: 1.1.0 > Reporter: Philip Deegan > Assignee: Serhii Harnyk > Fix For: 1.10.0 > > > Drill query fails when using flatten when some records contain an empty array > {noformat} > SELECT COUNT(*) FROM (SELECT FLATTEN(t.a.b.c) AS c FROM dfs.`flat.json` t) > flat WHERE flat.c.d.e = 'f' limit 1; > {noformat} > Succeeds on > { "a": { "b": { "c": [ { "d": { "e": "f" } } ] } } } > Fails on > { "a": { "b": { "c": [] } } } > Error > {noformat} > Error: SYSTEM ERROR: ClassCastException: Cannot cast > org.apache.drill.exec.vector.NullableIntVector to > org.apache.drill.exec.vector.complex.RepeatedValueVector > {noformat} > Is it possible to ignore the empty arrays, or do they need to be populated > with dummy data? -- This message was sent by Atlassian JIRA (v6.3.15#6346)