Wildcard expansion on field names should not try to match on name

[jpountz]

If you have two fields bar and foo.bar, b* would match both since the regexp is applied to the index name, the full name and the name. And for foo.bar, these are:

• index name: foo.bar
• full name: foo.bar
• name: bar

I don't think the regexp should try to match the name.

Related to: #4081

[clintongormley]

I agree. If wildcards are used, then they should match the full path, not the short version. Additional thought: it would be nice to allow * to match just one step in the path, and ** to match across dots, so, given fields:

• name.first
• name.first.raw
• name.last
• name.last.raw

This pattern name.* would match only name.first and name.last, while name.** would match all four fields.

[clintongormley]

Closing in favour of #8870