added table level config parameter for fetch size

[sm745052]

No description provided.

[gemini-code-assist]

Summary of Changes

Hello @sm745052, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request enhances the data pipeline by introducing a table-level configuration for the JDBC fetch size. This modification provides more granular control over how data is retrieved from source databases, allowing for performance optimization on a per-table basis. The changes involve updating the TableConfig to include this new parameter and adjusting the JdbcIoWrapper to leverage this table-specific setting during data processing.

Highlights

• Table-level Fetch Size Configuration: Introduced a new fetchSize parameter within the TableConfig class, allowing for specific fetch size settings per table rather than a global configuration.
• Integration into JDBC I/O Wrapper: The JdbcIoWrapper now correctly reads and applies the fetchSize from the TableConfig object when configuring JDBC I/O operations, ensuring the table-specific setting is utilized.
• Default Null Fetch Size: The TableConfig builder has been updated to initialize fetchSize to null by default, making it an optional parameter that can be set when needed.

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[codecov]

Codecov Report

❌ Patch coverage is 20.68966% with 92 lines in your changes missing coverage. Please review.
✅ Project coverage is 56.03%. Comparing base (4a4a597) to head (ae1f6c7).
⚠️ Report is 2 commits behind head on main.

Files with missing lines	Patch %	Lines
...dbc/rowmapper/provider/MysqlJdbcValueMappings.java	0.00%	36 Missing ⚠️
...owmapper/provider/PostgreSQLJdbcValueMappings.java	0.00%	34 Missing ⚠️
.../reader/io/jdbc/iowrapper/FetchSizeCalculator.java	60.00%	7 Missing and 3 partials ⚠️
...jdbc/dialectadapter/mysql/MysqlDialectAdapter.java	0.00%	6 Missing ⚠️
...ctadapter/postgresql/PostgreSQLDialectAdapter.java	0.00%	6 Missing ⚠️

❌ Your patch check has failed because the patch coverage (20.68%) is below the target coverage (80.00%). You can increase the patch coverage or adjust the target coverage.

Additional details and impacted files

@@             Coverage Diff              @@
##               main    #3109      +/-   ##
============================================
+ Coverage     50.79%   56.03%   +5.23%     
+ Complexity     5106     1713    -3393     
============================================
  Files           975      474     -501     
  Lines         59984    26780   -33204     
  Branches       6552     2825    -3727     
============================================
- Hits          30468    15005   -15463     
+ Misses        27375    10878   -16497     
+ Partials       2141      897    -1244     

Components	Coverage Δ
spanner-templates	71.83% <20.68%> (+0.85%)	⬆️
spanner-import-export	∅ <ø> (∅)
spanner-live-forward-migration	80.00% <ø> (-0.04%)	⬇️
spanner-live-reverse-replication	77.71% <ø> (+0.06%)	⬆️
spanner-bulk-migration	87.76% <20.68%> (-0.72%)	⬇️

Files with missing lines	Coverage Δ
.../reader/io/jdbc/dialectadapter/DialectAdapter.java	100.00% <ø> (ø)
...source/reader/io/jdbc/iowrapper/JdbcIoWrapper.java	93.15% <100.00%> (+0.14%)	⬆️
...e/reader/io/jdbc/iowrapper/config/TableConfig.java	100.00% <100.00%> (ø)
...jdbc/dialectadapter/mysql/MysqlDialectAdapter.java	97.59% <0.00%> (-2.06%)	⬇️
...ctadapter/postgresql/PostgreSQLDialectAdapter.java	93.98% <0.00%> (-3.21%)	⬇️
.../reader/io/jdbc/iowrapper/FetchSizeCalculator.java	60.00% <60.00%> (ø)
...owmapper/provider/PostgreSQLJdbcValueMappings.java	70.54% <0.00%> (-25.25%)	⬇️
...dbc/rowmapper/provider/MysqlJdbcValueMappings.java	72.30% <0.00%> (-11.03%)	⬇️

... and 527 files with indirect coverage changes

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