## Proposed changes
This pr fixes some failed regression test about checking shape
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* [Feat](nereids) when dealing insert into stmt with empty table source, fe returns directly (#34418)
When a LogicalOlapScan has no partitions, transform it to a LogicalEmptyRelation.
When dealing insert into stmt with empty table source, fe returns directly.
* [Fix](nereids) fix when insert into select empty table
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Co-authored-by: feiniaofeiafei <moailing@selectdb.com>
This PR was originally #16940 , but it has not been updated for a long time due to the original author @Cai-Yao . At present, we will merge some of the code into the master first.
thanks @Cai-Yao @yiguolei
in previous pr(#14876) we compact equals like "a=1 or a=2 or a = 3 " in to "a in (1, 2, 3)"
this pr set a lower bound for the number of equals COMPACT_EQUAL_TO_IN_PREDICATE_THRESHOLD (default is 2)
for performance reason, we create a hashSet to collect literals, like {1,2,3}. and hence, the literals in "in-predicates" are in random order.
for regression test, if we need stable output of explain string, set COMPACT_EQUAL_TO_IN_PREDICATE_THRESHOLD to a large number to avoid compact rule.
Set FE `enable_new_load_scan_node` to true by default.
So that all load tasks(broker load, stream load, routine load, insert into) will use FileScanNode instead of BrokerScanNode
to read data
1. Support loading parquet file in stream load with new load scan node.
2. Fix bug that new parquet reader can not read column without logical or converted type.
3. Change jsonb parser function to "jsonb_parse_error_to_null"
So that if the input string is not a valid json string, it will return null for jsonb column in load task.
