Fix Oracle bulk insert schema qualification issues

[DPschichholz]

Fix Oracle bulk insert ORA-39831 when EF Core default schema is configured

• Fix double-schema qualification when EF Core default schema is configured
• Clarify table name handling comment

Details

When HasDefaultSchema(...) is set, tableInfo.QuotedTableName becomes a SQL-quoted fully qualified identifier (e.g. "SchemaX"."TableA"). Passing this to OracleBulkCopy.DestinationTableName causes ODP.NET to double-apply the schema, producing SchemaX.SchemaX.TableA and failing with ORA-39831.

Change

• OracleBulkInsertProvider.BulkInsert: compute destinationTableName before assigning to bulkCopy.DestinationTableName:
  • Direct insert path (tableName == tableInfo.QuotedTableName): use tableInfo.TableName (plain unquoted name — ODP.NET resolves the schema itself)
  • Temp table path: use tableName unchanged

var destinationTableName = tableName == tableInfo.QuotedTableName
    ? tableInfo.TableName
    : tableName;

bulkCopy.DestinationTableName = destinationTableName;

[PhenX]

It's ok for me, but can you update your branch for the CI to pass ?

[DPschichholz]

@PhenX The branch has been rebased

[PhenX]

@DPschichholz thanks, the test fails now, can you check it?