ARROW-4815: [Rust] [DataFusion] Add support for SQL wilcard operator

[andygrove]

No description provided.

[github-actions]

https://issues.apache.org/jira/browse/ARROW-4815

[andygrove]

@sinistersnare FYI

[andygrove]

@paddyhoran@nevi-me Any objection to me merging this one?

[paddyhoran]

LGTM

[kou]

@andygrove This commit on master failed Rust lint: https://github.com/apache/arrow/runs/537449095

2020-03-26T19:06:49.5792511Z Diff in /arrow/rust/datafusion/src/sql/planner.rs at line 272:
2020-03-26T19:06:49.5793877Z Ok(Expr::Literal(ScalarValue::Utf8(s.clone())))
2020-03-26T19:06:49.5794168Z }
2020-03-26T19:06:49.5794309Z 2020-03-26T19:06:49.5795629Z - ASTNode::SQLAliasedExpr(ref expr, ref alias) => {
2020-03-26T19:06:49.5796217Z - Ok(Alias(Arc::new(self.sql_to_rex(&expr, schema)?), alias.to_owned()))
2020-03-26T19:06:49.5796537Z - }
2020-03-26T19:06:49.5796703Z + ASTNode::SQLAliasedExpr(ref expr, ref alias) => Ok(Alias(
2020-03-26T19:06:49.5796913Z + Arc::new(self.sql_to_rex(&expr, schema)?),
2020-03-26T19:06:49.5797166Z + alias.to_owned(),
2020-03-26T19:06:49.5797325Z + )),
2020-03-26T19:06:49.5797459Z 2020-03-26T19:06:49.5797599Z ASTNode::SQLIdentifier(ref id) => {
2020-03-26T19:06:49.5797792Z match schema.fields().iter().position(|c| c.name().eq(id))

Could you check this?

[paddyhoran]

A fix will be included in #6724

[kou]

OK!