fix: add rtree convertor

internal/engine/sqlite/convert.go

@@ -132,6 +132,9 @@ func (c *cc) convertCreate_virtual_table_stmtContext(n *parser.Create_virtual_ta
 case "fts5":
 // https://www.sqlite.org/fts5.html
 return c.convertCreate_virtual_table_fts5(n)
+case "rtree":
+// https://www.sqlite.org/rtree.html
+return c.convertCreate_virtual_table_rtree(n)
 default:
 return todo(
 fmt.Sprintf("create_virtual_table. unsupported module name: %q", moduleName),
@@ -140,6 +143,38 @@ func (c *cc) convertCreate_virtual_table_stmtContext(n *parser.Create_virtual_ta
 }
 }
 
+func (c *cc) convertCreate_virtual_table_rtree(n *parser.Create_virtual_table_stmtContext) ast.Node {
+stmt := &ast.CreateTableStmt{
+Name: parseTableName(n),
+IfNotExists: n.EXISTS_() != nil,
+}
+
+for i, arg := range n.AllModule_argument() {
+columnExpr, ok := arg.Expr().(*parser.Expr_qualified_column_nameContext)
+if !ok {
+continue
+}
+
+columnName := columnExpr.Column_name().GetText()
+
+col := ast.ColumnDef{
+Colname: identifier(columnName),
+IsNotNull: true,
+}
+
+// first argument in the rtree is an integer (ID)
+// https://www.sqlite.org/rtree.html#column_naming_details
+if i == 0 {
+col.TypeName = &ast.TypeName{Name: "integer"}
+} else {
+col.TypeName = &ast.TypeName{Name: "real"}
+}
+
+stmt.Cols = append(stmt.Cols, &col)
+}
+return stmt
+}
+
 func (c *cc) convertCreate_virtual_table_fts5(n *parser.Create_virtual_table_stmtContext) ast.Node {
 stmt := &ast.CreateTableStmt{
 Name: parseTableName(n),