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[IMPALA-7609] Support ANSI SQL Json functions - Impala - [issue]
...This is a follow-up task of IMPALA-376 where we implemented the built-in function as Hive's get_json_object.In ANSI SQL standard, there're other JSON functions to support: json_exists(<js...    Author: Quanlong Huang , 2018-09-22, 02:39
[IMPALA-376] Built-in functions for parsing JSON - Impala - [issue]
...Hi,Hive comes with some useful built-in UDFs to process JSON objects. get_json_object json_tupleTo make Impala and H...    Author: Zoltan Toth-Czifra , 2018-09-22, 02:39
[expand - 4 more] - JSON support: Hive compatibility or ANSI SQL standard - Impala - [mail # user]
...Thanks for your reply, friends!Base on the discussion, we'll choose option c. I'll continue to implementHive's get_json_object function in IMPALA-376. For implementing the ANSIJSON functions...
   Author: Quanlong Huang , Brock Noland , ... , 2018-09-22, 02:38
[IMPALA-7608] Estimate row count from file size when no stats available - Impala - [issue]
...Impala makes heavy use of stats, which is a good thing. Stats feed into query planning where they allow the planner to choose among a fixed set of alternatives such as: do I put t1 on the bu...    Author: Paul Rogers , 2018-09-22, 02:04
[IMPALA-7367] Pack StringValue, CollectionValue and TimestampValue slots - Impala - [issue]
...This is a follow-on to finish up the work from IMPALA-2789. IMPALA-2789 didn't actually fully pack the memory layout because StringValue, TimestampValue and CollectionValue still occupy 16 b...    Author: Tim Armstrong , 2018-09-22, 00:18
[IMPALA-7560] Better selectivity estimate for != (not equals) binary predicate - Impala - [issue]
...Currently we use the default selectivity estimate for any binary predicate with op other than EQ / NON_DISTINCT.// Determine selectivity    // TODO: Compute selectivity for nested ...    Author: bharath v , 2018-09-21, 23:52
[IMPALA-7601] Define a-priori selectivity and NDV values - Impala - [issue]
...Impala makes extensive use of table stats during query planning. For example, the NDV (number of distinct values) is used to compute selectivity, the degree of reduction (also called the red...    Author: Paul Rogers , 2018-09-21, 23:52
[IMPALA-7600] Mem limit exceeded in test_kudu_scan_mem_usage - Impala - [issue]
...Seen in an exhaustive release build:00:05:35  TestScanMemLimit.test_kudu_scan_mem_usage[exec_option: {'batch_size': 0, 'num_nodes': 0, 'disable_codegen_rows_threshold': 5000, 'disable_c...    Author: Thomas Tauber-Marshall , 2018-09-21, 23:49
[IMPALA-7465] Hit memory limit in TestScanMemLimit.test_kudu_scan_mem_usage on ASAN build - Impala - [issue]
...An ASAN build encountered a failure in test_mem_usage_scaling.TestScanMemLimit.test_kudu_scan_mem_usage() due to hitting the memory limit:E   ImpalaBeeswaxException: ImpalaBeeswaxExcept...    Author: Joe McDonnell , 2018-09-21, 23:49
[IMPALA-7545] Add admission control status to query log - Impala - [issue]
...We already include the query progress in the HS2 GetLog() response (although for some reason we don't do the same for beeswax) so we should include admission control progress. We should defi...    Author: Tim Armstrong , 2018-09-21, 23:46