The optimizer used the wrong index in the lookup query

[MMyheart]

Scenario:

1、using schema as follow

ID	Index Name	By Tag	Columns
645917039	"idx_ab"	"test"	["a", "b"]
1030578011	"idx_ac"	"test"	["a", "c"]

2、execute query lookup on test where test.a == 1 yield test.a, test.b;,
then execute plan as follow

3、index idx_ac is used, however, idx_ab is better

Solution:

1、the best index need to contains all of the result columns to avoid additional properties query operations
2、this pr #2958 solutes the problem, and the result is as follow

[HarrisChu]

@MMyheart
transfer the issue to current repo.

[MMyheart]

transfer the pr to current repo, the new pr is #2958