Fix three bugs:
1. The EOF of lazy read columns may be not equal to the EOF of predicate columns.
(for example: If the predicate column has 3 pages, with 400 rows for each, but the last page
is filtered by page index. When batch_size=992, the EOF of predicate column is true.
However, we should set batch_size=800 for lazy read column, so the EOF of lazy read column may be false.)
2. The array column does not count the number of nulls
3. Generate wrong NullMap for array column
fc70179acb