执行计划：
±----------------------±-------------±----------±------------------------------±---------------------+
| id | estRows | task | access object | operator info |
±----------------------±-------------±----------±------------------------------±---------------------+
| TableReader_5 | 814637450.00 | root | | data:TableFullScan_4 |
| └─TableFullScan_4 | 814637450.00 | cop[tikv] | table:d | keep order:false |
±----------------------±-------------±----------±------------------------------±---------------------+
spark是2.4.6， tispark是2.4.1