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Implement completable methods #31

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Implement completable methods #31

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52 changes: 46 additions & 6 deletions pkg/trino/datasource.go
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Original file line number Diff line number Diff line change
Expand Up @@ -77,16 +77,56 @@ func (s *TrinoDatasource) Converters() (sc []sqlutil.Converter) {
}

func (s *TrinoDatasource) Schemas(ctx context.Context, options sqlds.Options) ([]string, error) {
// TBD
return []string{}, nil
query := "SHOW SCHEMAS"
args := []string{}
if options["database"] != "" {
query += " FOR ?"
args = append(args, options["database"])
}
rows, err := s.db.Query(query, args)
if err != nil {
return nil, err
}
return getNames(rows)
}

func (s *TrinoDatasource) Tables(ctx context.Context, options sqlds.Options) ([]string, error) {
// TBD
return []string{}, nil
query := "SHOW TABLES"
args := []string{}
if options["schema"] != "" {
query += " FOR ?"
args = append(args, options["schema"])
}
rows, err := s.db.Query(query, args)
if err != nil {
return nil, err
}
return getNames(rows)
}

func (s *TrinoDatasource) Columns(ctx context.Context, options sqlds.Options) ([]string, error) {
// TBD
return []string{}, nil
query := "SHOW COLUMNS"
args := []string{}
if options["table"] != "" {
query += " FOR ?"
args = append(args, options["table"])
}
rows, err := s.db.Query(query, args)
if err != nil {
return nil, err
}
return getNames(rows)
}

func getNames(rows *sql.Rows) ([]string, error) {
results := []string{}
name := ""
for rows.Next() {
err := rows.Scan(&name)
if err != nil {
return nil, err
}
results = append(results, name)
}
return results, nil
}