[nickvanw]

Summary

• parse numeric SET masks as uint64 instead of signed int64
• walk SET bitmap bits directly and preserve declaration order
• return an explicit error when a numeric mask references an unmapped SET value instead of panicking
• serialize numeric zero as the empty SET value

Evidence

The previous converter formatted the numeric mask as binary text and indexed setValues without bounds checks. A mask with a set bit beyond the parsed metadata could panic, and valid 64-bit SET masks above MaxInt64 were treated as raw strings. Vitess handles SET masks as unsigned 64-bit bitmaps and errors on unmapped bits.

Validation

• GOCACHE=/tmp/fivetran-bugbash.qcjUz1/gocache go test ./cmd/internal/server/handlers -run 'TestSetConverter'
• GOCACHE=/tmp/fivetran-bugbash.qcjUz1/gocache go test ./cmd/internal/server/handlers
• git diff --check