1. create csv based carbon table using
CREATE TABLE fact_table (col1 bigint, col2 string, ..., col100 string)
STORED BY 'CarbonData'
TBLPROPERTIES(
  'foramt'='csv',
  'csv.delimiter'=',',
  'csv.header'='col1,col2,col100')

2. Load data to this table using
ALTER TABLE fact_table ADD SEGMENT LOCATION 'path/to/data1'

This closes apache#2374

In previous implementation, table pruning is performed once for all
segments. In this case, the pruning info is updated after default/CG/FG
datamap pruning.

Now we want the table pruning to be performed segment by segment, so in
this case, the pruning info will be updated after default/CG/FG datamap
pruning for each segment.

This means that we need to accumulate the pruning info during pruning.