fix: SQL parsing errors occurred in custom database node

[zhuangjie1125]

en: SQL parsing errors occurred in custom database node

[codecov-commenter]

Codecov Report

❌ Patch coverage is 53.84615% with 18 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
...main/workflow/internal/nodes/database/customsql.go	53.84%	13 Missing and 5 partials ⚠️

Files with missing lines	Coverage Δ
...main/workflow/internal/nodes/database/customsql.go	55.04% <53.84%> (ø)

... and 1885 files with indirect coverage changes

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