Set default schema

[delphisharp]

fix https://github.com/reata/sqllineage/issues/536

please check . thanks

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 99.50%. Comparing base (3574f2d) to head (b226751). Report is 1 commits behind head on master.

:exclamation: Current head b226751 differs from pull request most recent head 213413c. Consider uploading reports for the commit 213413c to get more accurate results

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #555      +/-   ##
==========================================
- Coverage   99.50%   99.50%   -0.01%     
==========================================
  Files          41       41              
  Lines        2219     2214       -5     
==========================================
- Hits         2208     2203       -5     
  Misses         11       11              

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[reata]

Hold until we get #553 merged