Fix update count handling for multi-statement queries executed via PreparedStatement. (#2722)

[Ananya Garg (Ananya2)]

Description
This PR addresses an inconsistency in how PreparedStatement handles update counts for multi-statement queries, particularly when INSERT operations are involved.

Issue
When executing multi-statement queries containing INSERT operations, PreparedStatement returned different update counts compared to Statement due to differences in Tabular Data Stream (TDS) token processing:

• Statement: Requires reading an additional TDS_DONE token for INSERT operations to obtain the correct update count.
• PreparedStatement: Does not require this additional token processing, but was incorrectly using the same logic as Statement, leading to inaccurate update counts.

Example of inconsistent behavior:
PreparedStatement ps = conn.prepareStatement( "DELETE FROM TestTable; " + "INSERT INTO TestTable (c1,c2) VALUES (?, ?); " + "INSERT INTO TestTable (c1,c2) VALUES (?, ?); " + "UPDATE TestTable SET C1 = 1; " + "INSERT INTO TestTable (c1,c2) VALUES (?, ?); " + "SELECT * FROM TestTable" ); do { boolean hasResults = ps.getMoreResults(); System.out.println("update count: " + ps.getUpdateCount() + ", has result: " + hasResults); } while (true);

• Driver 12.10 output:
  update count: 3, has result :false update count: 1, has result :false update count: 1, has result :false update count: 2, has result :false update count: 1, has result :false update count: -1, has result :true
• Driver 13.1 output:
  update count: 3, has result :false update count: 2, has result :false update count: 1, has result :false update count: -1, has result :true

Root Cause
In PR #2554, the following logic was added to handle INSERT operations:
if ((StreamDone.CMD_INSERT == doneToken.getCurCmd()) && (-1 != doneToken.getUpdateCount()) && EXECUTE == executeMethod) { return true; }
This logic is correct for Statement but not for PreparedStatement.
For PreparedStatement, the execute API for INSERT does not require reading an additional explicit TDS_DONE token — applying the same logic caused incorrect update counts.

Fix
Added overridden methods to correctly handle update count retrieval in both PreparedStatement and SQLServerStatement, ensuring that each uses the appropriate TDS token processing logic.

Testing

• Verified all existing tests pass.
• Added new test cases covering various combinations of execute API calls via PreparedStatement to validate update counts for INSERT, UPDATE, DELETE, and MERGE operations, followed by explicit SELECT statements.

Closes #2722

[codecov]

Codecov Report

❌ Patch coverage is 66.66667% with 1 line in your changes missing coverage. Please review.
⚠️ Please upload report for BASE (main@1ed161f). Learn more about missing BASE report.
⚠️ Report is 2 commits behind head on main.

Files with missing lines	Patch %	Lines
...m/microsoft/sqlserver/jdbc/SQLServerStatement.java	50.00%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #2737   +/-   ##
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  Coverage        ?   51.54%           
  Complexity      ?     4071           
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  Files           ?      149           
  Lines           ?    34244           
  Branches        ?     5719           
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  Hits            ?    17650           
  Misses          ?    14104           
  Partials        ?     2490           

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[David Engel (David-Engel)]

Just the changes around unnecessary catching of exceptions in new tests. Otherwise approved.