5d02c48715
bp #38432 ## Proposed changes Add `hive_parquet_use_column_names` and `hive_orc_use_column_names` session variables to read the table after rename column in `Hive`. These two session variables are referenced from `parquet_use_column_names` and `orc_use_column_names` of `Trino` hive connector. By default, these two session variables are true. When they are set to false, reading orc/parquet will access the columns according to the ordinal position in the Hive table definition. For example: ```mysql in Hive : hive> create table tmp (a int , b string) stored as parquet; hive> insert into table tmp values(1,"2"); hive> alter table tmp change column a new_a int; hive> insert into table tmp values(2,"4"); in Doris : mysql> set hive_parquet_use_column_names=true; Query OK, 0 rows affected (0.00 sec) mysql> select * from tmp; +-------+------+ | new_a | b | +-------+------+ | NULL | 2 | | 2 | 4 | +-------+------+ 2 rows in set (0.02 sec) mysql> set hive_parquet_use_column_names=false; Query OK, 0 rows affected (0.00 sec) mysql> select * from tmp; +-------+------+ | new_a | b | +-------+------+ | 1 | 2 | | 2 | 4 | +-------+------+ 2 rows in set (0.02 sec) ``` You can use `set parquet.column.index.access/orc.force.positional.evolution = true/false` in hive 3 to control the results of reading the table like these two session variables. However, for the rename struct inside column parquet table, the effects of hive and doris are different.
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