fmt: minor cleanup of sql_expr (#8340)

vlib/v/ast/ast.v

@@ -1140,13 +1140,6 @@ pub:
 	foo int // todo
 }
 
-/*
-pub enum SqlExprKind {
-	select_
-	insert
-	update
-}
-*/
 pub enum SqlStmtKind {
 	insert
 	update

vlib/v/fmt/fmt.v

@@ -1293,22 +1293,17 @@ pub fn (mut f Fmt) sql_expr(node ast.SqlExpr) {
 	f.write('sql ')
 	f.expr(node.db_expr)
 	f.writeln(' {')
-	f.write('\t')
+	f.write('\tselect ')
-	f.write('select ')
+	table_name := util.strip_mod_name(f.table.get_type_symbol(node.table_expr.typ).name)
-	esym := f.table.get_type_symbol(node.table_expr.typ)
-	table_name := util.strip_mod_name(esym.name)
 	if node.is_count {
 		f.write('count ')
 	} else {
-		if node.fields.len > 0 {
+		for i, fd in node.fields {
-			for tfi, tf in node.fields {
+			f.write(fd.name)
-				f.write(tf.name)
+			if i < node.fields.len - 1 {
-				if tfi < node.fields.len - 1 {
 				f.write(', ')
 			}
 		}
-			f.write(' ')
-		}
 	}
 	f.write('from $table_name')
 	if node.has_where {
@@ -2361,12 +2356,13 @@ pub fn (mut f Fmt) sql_stmt(node ast.SqlStmt) {
 	f.expr(node.db_expr)
 	f.writeln(' {')
 	table_name := util.strip_mod_name(f.table.get_type_symbol(node.table_expr.typ).name)
+	f.write('\t')
 	match node.kind {
 		.insert {
-			f.writeln('\tinsert $node.object_var_name into $table_name')
+			f.writeln('insert $node.object_var_name into $table_name')
 		}
 		.update {
-			f.write('\tupdate $table_name set ')
+			f.write('update $table_name set ')
 			for i, col in node.updated_columns {
 				f.write('$col = ')
 				f.expr(node.update_exprs[i])
@@ -2382,7 +2378,7 @@ pub fn (mut f Fmt) sql_stmt(node ast.SqlStmt) {
 			f.writeln('')
 		}
 		.delete {
-			f.write('\tdelete from $table_name where ')
+			f.write('delete from $table_name where ')
 			f.expr(node.where_expr)
 			f.writeln('')
 		}