v0.6.20-nightly

What's Changed

Build/Testing/CI

• [ci] add udeps check (#3719) by @PsiACE
• ISSUE-3705 Fix "datafuse-extras/clickhouse_driver/ Repository not found." (#3712) by @cadl

Features

• dal2: Implement fs support (#3695) by @Xuanwo
• Add dal_metrics and scan_progress in processlist (#3713) by @GrapeBaBa

Improvement

• Merge nullable and return_type methods (#3708) by @junli1026
• Add scan_cost (#3613) by @bohutang
• Improve origin array builder & make nullable/no-nullable builder support (#3700) by @Veeupup

Others

• [ci] add udeps check (#3719) by @PsiACE
• ISSUE-3709: table read performance tweaking (#3718) by @dantengsky
• dal2: Implement fs support (#3695) by @Xuanwo
• Merge nullable and return_type methods (#3708) by @junli1026
• Add dal_metrics and scan_progress in processlist (#3713) by @GrapeBaBa
• ISSUE-3705 Fix "datafuse-extras/clickhouse_driver/ Repository not found." (#3712) by @cadl
• Add scan_cost (#3613) by @bohutang

Performance Improvement

• ISSUE-3709: table read performance tweaking (#3718) by @dantengsky
• ISSUE-3618: Improved performance of arithmetic functions (#3697) by @zhyass