optimize: get oracle primary index

[slievrly]

Signed-off-by: slievrly slievrly@163.com

Ⅰ. Describe what this PR did

optimize oracle index:

1. "PRIMARY" is used for mysql primary indexName but not for oracle
2. get primary index should always used the columnName，avoid to different oracle version index offset changed

Ⅱ. Does this pull request fix one issue?

Ⅲ. Why don't you add test cases (unit test/integration test)?

Ⅳ. Describe how to verify it

Ⅴ. Special notes for reviews

[codecov-io]

Codecov Report

Merging #1583 into develop will increase coverage by 0.03%.
The diff coverage is 0%.

@@              Coverage Diff              @@
##             develop    #1583      +/-   ##
=============================================
+ Coverage      46.41%   46.45%   +0.03%     
  Complexity      1713     1713              
=============================================
  Files            350      350              
  Lines          12829    12827       -2     
  Branches        1616     1615       -1     
=============================================
+ Hits            5955     5959       +4     
+ Misses          6226     6222       -4     
+ Partials         648      646       -2

Impacted Files	Coverage Δ	Complexity Δ
...rm/datasource/sql/struct/TableMetaCacheOracle.java	0% <0%> (ø)	0 <0> (ø)	⬇️
...server/store/file/FileTransactionStoreManager.java	47.38% <0%> (+1.39%)	19% <0%> (ø)	⬇️

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[l81893521]

LGTM

[xingfudeshi]

LGTM.

[zjinlei]

LGTM