Function getSequenceComments

backend/plugin/db/oracle/sync.go:1397–1444

getSequenceComments gets comments for sequences from Oracle system views

(txn *sql.Tx, schemaName string)

// getSequenceComments gets comments for sequences from Oracle system views
func getSequenceComments(txn *sql.Tx, schemaName string) (map[db.TableKey]string, error) {
	sequenceCommentMap := make(map[db.TableKey]string)

	// Oracle doesn't have a direct sequence comments view, but we can try user_tab_comments
	// where TABLE_TYPE might be 'SEQUENCE' in some Oracle versions
	query := ""
	if schemaName == "" {
		query = fmt.Sprintf(`
		SELECT OWNER, TABLE_NAME, COMMENTS
		FROM all_tab_comments
		WHERE OWNER NOT IN (%s) AND OWNER NOT LIKE 'APEX_%%' AND COMMENTS IS NOT NULL
		AND TABLE_TYPE = 'SEQUENCE'
		ORDER BY OWNER, TABLE_NAME`, systemSchema)
	} else {
		query = fmt.Sprintf(`
		SELECT OWNER, TABLE_NAME, COMMENTS
		FROM all_tab_comments
		WHERE OWNER = '%s' AND COMMENTS IS NOT NULL
		AND TABLE_TYPE = 'SEQUENCE'
		ORDER BY TABLE_NAME`, schemaName)
	}

	slog.Debug("running get sequence comments query")
	rows, err := txn.Query(query)
	if err != nil {
		// If the query fails (e.g., TABLE_TYPE = 'SEQUENCE' not supported), return empty map
		slog.Debug("sequence comments query failed, returning empty map", slog.String("error", err.Error()))
		return sequenceCommentMap, nil
	}
	defer rows.Close()

	for rows.Next() {
		var schemaName, sequenceName, comment string
		if err := rows.Scan(&schemaName, &sequenceName, &comment); err != nil {
			return nil, err
		}
		key := db.TableKey{Schema: schemaName, Table: sequenceName}
		sequenceCommentMap[key] = common.SanitizeUTF8String(comment)
	}
	if err := rows.Err(); err != nil {
		return nil, util.FormatErrorWithQuery(err, query)
	}
	if err := rows.Close(); err != nil {
		return nil, errors.Wrapf(err, "failed to close rows")
	}

	return sequenceCommentMap, nil
}

// getFunctionComments gets comments for functions and procedures from Oracle system views
func getFunctionComments(txn *sql.Tx, schemaName string) (map[db.TableKey]string, error) {