1. Add metadata table 'statistics' to store index information; 2. In the header information returned by mysql, the data type length is returned according to the actual type.
# fe-common This module is used to store some common classes of other modules. # spark-dpp This module is Spark DPP program, used for Spark Load function. Depends: fe-common # fe-core This module is the main process module of FE. Depends: fe-common, spark-dpp