[PR] fix(services): improve stat implementation [opendal]

["erickguan (via GitHub)" <gi...@apache.org>]

erickguan opened a new pull request, #7857:
URL: https://github.com/apache/opendal/pull/7857

   # Which issue does this PR close?
   
   <!--
   We generally require a GitHub issue to be filed for all bug fixes and enhancements. You can link an issue to this PR using the GitHub syntax. For example `Closes #123` indicates that this PR will close issue #123.
   -->
   
   Closes #7855.
   
   # Rationale for this change
   
   Services could use length operation instead of fetching an object for stat:
   
   - d1
   - mongo/gridfs
   
   So improve.
   
   Some SQLs don't follow DB recommendations, also improved them.
   
   # What changes are included in this PR?
   
   - Improvement to stat
   - Improvement to SQL
   
   # Are there any user-facing changes?
   
   - d1/PostgreSQL/SQLite/MySQL service users will follow strict column and table name quoted identifiers standard. Columns and table names are case sensitive now and supports special characters.
   
   # AI Usage Statement
   
   GPT-5.5


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Re: [PR] fix(services): improve stat implementation [opendal]

["Xuanwo (via GitHub)" <gi...@apache.org>]

Xuanwo merged PR #7857:
URL: https://github.com/apache/opendal/pull/7857


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