* feat: add showIndex parser rule
* test: uncomment show index test cases
* test: add unit tests about DML syntax to HiveSQL
* test: add unit tests about export and import syntax to HiveSQL
* refactor: recompile hive grammar
* test: correct description of HiveSQL unit tests
* check and update abort and alter sql
* delete superfluous space
* update grammar lib after change alter parser
* update alter parser to be compatible
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Co-authored-by: zhaoge <>
