[machi-genggeng]

Fixes: #20462

In parseBaseOrParameterizedType, parsing protobuf type identifiers returned early with return t, nil, preventing the parser from consuming the closing > token when t.Array was true.

This change:

1. Removes the early returns in parseBaseOrParameterizedType so the expect(">") check executes for arrays.
2. Updates Type.SQL() to allow proto types to receive the ARRAY<...> wrapping when t.Array is true.
3. Adds parser and SQL serialization test cases for array proto types.

[gemini-code-assist]

Code Review

This pull request fixes operator precedence and return logic in spanner/spansql to correctly handle and format arrays of protobuf and enum types, along with adding corresponding parser and SQL generation tests. The reviewer noted that the explicit break statements introduced in parser.go are redundant in Go's switch blocks and should be removed to keep the code idiomatic.

[gemini-code-assist]

In Go, switch cases do not fall through by default, so an explicit break statement at the end of a case is redundant. It can be safely omitted to keep the code clean and idiomatic.

Suggested change

	t.Base = Proto
	return t, nil
	break
	t.Base = Proto