Drop cached db connections in macros upon hitting an error #1547

Job	Run time
Integration Test (ubuntu-latest)	37s
Check	40s
Integration Test (macOS-latest)	51s
Integration Test (macOS-13)	1m 19s
Functional Test (MySQL)	51s
Functional Test (SQLite)	31s
Functional Test (PostgreSQL)	39s
Build (windows-latest)	1m 43s
Build (ubuntu-latest)	41s
Build (macOS-13)	1m 13s
Build (macOS-latest)	47s
	9m 52s

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