Create index parameters problem for scalar about milvus-sdk-java

[yhmo]

No need to set index parameters, but you need to specify an index type.

The CreateIndexParam has these methods:
withIndexType()
withMetricType()
withExtraParam()

For scalar field, you don't need to call withMetricType() and withExtraParam(), but you need to call withIndexType() to specify index type.
For VARCHAR field, the index type is TRIE.
For Int/Float field, the index type is STL_SORT.

JAVA example:

milvus-sdk-java/examples/main/java/io/milvus/SimpleExample.java

Line 93 in 5af81f8

.withIndexType(IndexType.TRIE)

[yhmo]

A commit has been merged to set the default index type: #742
The next version will contain this commit.

[shopenhe]

Got, THX