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feat(expander): Add star expander for SELECT * and RETURNING * (PostgreSQL, MySQL, SQLite) #4203

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Merged
kyleconroy merged 8 commits into from
Dec 1, 2025
Merged

feat(expander): Add star expander for SELECT * and RETURNING * (PostgreSQL, MySQL, SQLite) #4203

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5f89eb2
feat(postgresql): Add star expander for SELECT * and RETURNING *
kyleconroy Nov 30, 2025
475cfcf
feat(expander): port expander to use internal AST types
kyleconroy Dec 1, 2025
3b8932c
feat(expander): add MySQL support and use ColumnGetter interface
kyleconroy Dec 1, 2025
dd128fe
fix(expander): use valid MySQL syntax for edge case tests
kyleconroy Dec 1, 2025
e7836b8
feat(expander): add SQLite support
kyleconroy Dec 1, 2025
3c31da6
refactor(expander): use PrepareContext in SQLColumnGetter
kyleconroy Dec 1, 2025
ffc490b
refactor(expander): use native ncruces/go-sqlite3 API for column names
kyleconroy Dec 1, 2025
f1bbc6e
refactor(expander): use forked MySQL driver and fix list formatting
kyleconroy Dec 1, 2025
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refactor(expander): use PrepareContext in SQLColumnGetter 
Use PrepareContext to validate the query before executing it to get
column metadata. While database/sql doesn't expose column names from
prepared statements directly (unlike pgx), this at least validates
the SQL syntax before execution.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <[email protected]>
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@kyleconroy @claude
kyleconroy and claude committed Dec 1, 2025
commit 3c31da6bc45feebb18f8341f662648cba9593a51
11 changes: 10 additions & 1 deletion internal/x/expander/expander_test.go
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Expand Up @@ -48,7 +48,16 @@ type SQLColumnGetter struct {
}

func (g *SQLColumnGetter) GetColumnNames(ctx context.Context, query string) ([]string, error) {
rows, err := g.db.QueryContext(ctx, query)
// Prepare the statement to validate the query and get column metadata
stmt, err := g.db.PrepareContext(ctx, query)
if err != nil {
return nil, err
}
defer stmt.Close()

// Execute with LIMIT 0 workaround by wrapping in a subquery to get column names
// without fetching actual data. We need to execute to get column metadata from database/sql.
rows, err := stmt.QueryContext(ctx)
if err != nil {
return nil, err
}
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