Support Oracle Database 12.1 (or later)

[duke147]

Description

Support Oracle Database 12.1 (or later).

How Has This Been Tested?

Run unit test with command: pytest tests/test_conn_oracle.py
docker run -d -p 1521:1521 -e ORACLE_PASSWORD=oracle gvenzl/oracle-xe:21
sqlplus system/oracle

Snapshots:

Include snapshots for easier review.

Checklist:

• My code follows the style guidelines of this project
• I have already rebased the commits and make the commit message conform to the project standard.
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• Any dependent changes have been merged and published in downstream modules

[csunny]

@duke147 Thanks， but too many unrelated code updates, you need to rebase the main and resubmit.

[csunny]

Too many incompatible return type with base class

dbgpt/datasource/rdbms/conn_oracle.py:83: error: "Generator[str, None, None]" has no attribute "difference"  [attr-defined]
dbgpt/datasource/rdbms/conn_oracle.py:90: error: Incompatible types in assignment (expression has type "Generator[str, None, None]", variable has type "set[str]")  [assignment]
dbgpt/datasource/rdbms/conn_oracle.py:188: error: Return type "list[dict[Any, Any]]" of "_get_sample_rows" incompatible with return type "str" in supertype "RDBMSConnector"  [override]
dbgpt/datasource/rdbms/conn_oracle.py:199: error: Return type "list[dict[Any, Any]]" of "_get_table_indexes" incompatible with return type "str" in supertype "RDBMSConnector"  [override]
dbgpt/datasource/rdbms/conn_oracle.py:248: error: Incompatible return value type (got "Any | None", expected "str")  [return-value]
dbgpt/datasource/rdbms/conn_oracle.py:250: error: Return type "tuple[str, str]" of "get_collation" incompatible with return type "str | None" in supertype "BaseConnector"  [override]
dbgpt/datasource/rdbms/conn_oracle.py:263: error: Incompatible return value type (got "tuple[Any | None, Any | None]", expected "tuple[str, str]")  [return-value]

[duke147]

@csunny Please take a look and let me know if there's anything else I need to do.

[Aries-ckt]

@csunny Please take a look and let me know if there's anything else I need to do.

@duke147 docker hub cannot pull gvenzl/oracle-xe:21, now we cannot test oracle, so we will install oracle manually soon.

[duke147]

you can try this : docker pull dockerproxy.com/gvenzl/oracle-xe:21

[Aries-ckt]

@codermast ，Currently, the oracle docker image cannot be pulled down and tested.