change the Oracle select to use OFFSET...FETCH

[zhangyongding]

No description provided.

[coveralls]

coverage: 97.124% (+0.1%) from 97.01%
when pulling 9bae871 on zhangyongding:chore-oralce-select-offset-fetch
into 03c69da on huandu:master.

[Copilot]

Pull request overview

This PR modernizes Oracle pagination by replacing the legacy ROWNUM-based approach with the standard OFFSET...FETCH syntax (introduced in Oracle 12c). This brings Oracle's SQL generation in line with modern SQL standards and simplifies the codebase.

Changes:

• Removed complex ROWNUM-based pagination logic from select.go
• Implemented OFFSET...FETCH syntax for Oracle in select.go (matching the already-updated union.go)
• Updated test expectations in select_test.go to reflect the new Oracle query format

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 1 comment.

File	Description
select.go	Replaced ROWNUM-based pagination with OFFSET...FETCH syntax; removed unused strings import and ~50 lines of complex nested query logic
select_test.go	Updated Oracle test expectations to show the new OFFSET...FETCH query format instead of ROWNUM queries

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[zhangyongding]

Can it be merged？