fix: named params contribute to batch parameter count (#1841)

Author: chrisyxlee

examples/batch/postgresql/batch.go

@@ -10,6 +10,14 @@ WHERE book_id = $1;
 DELETE FROM books
 WHERE book_id = $1;
 
+-- name: DeleteBookNamedFunc :batchexec
+DELETE FROM books
+WHERE book_id = sqlc.arg(book_id);
+
+-- name: DeleteBookNamedSign :batchexec
+DELETE FROM books
+WHERE book_id = @book_id;
+
 -- name: BooksByYear :batchmany
 SELECT * FROM books
 WHERE year = $1;

examples/batch/postgresql/querier.go

@@ -80,11 +80,10 @@ func (c *Compiler) parseQuery(stmt ast.Node, src string, o opts.Parser) (*Query,
 	if err != nil {
 		return nil, err
 	}
+	raw, namedParams, edits := rewrite.NamedParameters(c.conf.Engine, raw, numbers, dollar)
 	if err := validate.Cmd(raw.Stmt, name, cmd); err != nil {
 		return nil, err
 	}
-
-	raw, namedParams, edits := rewrite.NamedParameters(c.conf.Engine, raw, numbers, dollar)
 	rvs := rangeVars(raw.Stmt)
 	refs, err := findParameters(raw.Stmt)
 	if err != nil {