feat: push down alias decode

[Yisaer]

No description provided.

[codecov]

Codecov Report

Attention: Patch coverage is 76.63551% with 50 lines in your changes missing coverage. Please review.

Project coverage is 71.38%. Comparing base (c361fdd) to head (0926c29).
Report is 3 commits behind head on master.

Files with missing lines	Patch %	Lines
internal/converter/json/converter.go	45.45%	25 Missing and 5 partials ⚠️
internal/topo/planner/push_proj.go	74.55%	11 Missing and 3 partials ⚠️
internal/topo/planner/dataSourcePlan.go	82.35%	2 Missing and 1 partial ⚠️
internal/topo/planner/planner_source.go	0.00%	2 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #3460      +/-   ##
==========================================
- Coverage   71.39%   71.38%   -0.01%     
==========================================
  Files         413      413              
  Lines       47412    47570     +158     
==========================================
+ Hits        33847    33957     +110     
- Misses      10925    10962      +37     
- Partials     2640     2651      +11     

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