fix(database/gdb): Resolve column ambiguity in GROUP BY/ORDER BY with MySQL JOIN

[ljluestc]

When using JOIN queries in MySQL with the Group() method, column names in GROUP BY clauses become ambiguous if multiple tables contain columns with the same name (commonly id). This results in MySQL errors like "Column 'id' in group statement is ambiguous".

Example Issue:

model := t.Ctx(ctx).Fields("t_inf_job.*, t_inf_job_attr.*").
    LeftJoin("t_inf_job_attr", "t_inf_job.id = t_inf_job_attr.job_id").
    Where(t.Columns().Deleted, 0)

// This would fail with "Column 'id' in group statement is ambiguous"
err = model.Group(t.Columns().Id).Scan(&jobs)

Key Changes

1. Modified function signature: Group(groupBy ...string) → Group(groupBy ...any) to support Raw SQL expressions
2. Auto-prefixing logic: When JOINs are detected (by checking for " JOIN " in the tables string), unqualified column names are automatically prefixed with the primary table name
3. Preserved existing behavior: Already qualified columns (containing ".") and Raw expressions are handled as before
4. Added comprehensive test: Test_Model_Group_WithJoin verifies the fix works correctly with JOIN queries

[Copilot]

Pull request overview

This PR addresses the issue of ambiguous column names in MySQL GROUP BY clauses when using JOIN queries. When multiple tables share common column names (like id), unqualified column references in GROUP BY cause MySQL errors.

Key Changes:

• Changed Group() method signature to accept ...any instead of ...string to support Raw SQL expressions
• Added auto-prefixing logic that detects JOINs and qualifies unqualified column names with the primary table name
• Preserved handling for already-qualified columns and Raw expressions

Reviewed changes

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

File	Description
database/gdb/gdb_model_order_group.go	Modified Group() method to auto-prefix unqualified columns when JOINs are detected, supporting both string and Raw expression inputs
contrib/drivers/mysql/mysql_z_unit_feature_model_join_test.go	Added test case verifying GROUP BY works with JOIN queries without ambiguous column errors

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[Copilot]

Pull request overview

Copilot reviewed 4 out of 4 changed files in this pull request and generated 8 comments.

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