parquet reading improvements #650
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use bufreader to read page header, avoid reading in fragments. add hadoop shim.
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lihao712
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use bufreader to read page header, avoid reading in fragments. add hadoop shim. Co-authored-by: zhangli20 <zhangli20@kuaishou.com>
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use bufreader to read page header, avoid reading in fragments. add hadoop shim. Co-authored-by: zhangli20 <zhangli20@kuaishou.com>
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supports parquet parallel reading.
use bufreader to read page header, avoid reading in fragments.