Ensure sub-queries are correctly specified as read of write

sql/ifelse.go

@@ -16,6 +16,14 @@ package sql
 
 func (p *parser) parseIfelseStatement() (stmt *IfelseStatement, err error) {
 
+	grw := p.buf.rw
+
+	p.buf.rw = false
+
+	defer func() {
+		p.buf.rw = grw
+	}()
+
 	stmt = &IfelseStatement{}
 
 	for {

sql/let.go

@@ -16,6 +16,14 @@ package sql
 
 func (p *parser) parseLetStatement() (stmt *LetStatement, err error) {
 
+	grw := p.buf.rw
+
+	p.buf.rw = false
+
+	defer func() {
+		p.buf.rw = grw
+	}()
+
 	stmt = &LetStatement{}
 
 	// The first part of a LET expression must

sql/return.go

@@ -16,6 +16,14 @@ package sql
 
 func (p *parser) parseReturnStatement() (stmt *ReturnStatement, err error) {
 
+	grw := p.buf.rw
+
+	p.buf.rw = false
+
+	defer func() {
+		p.buf.rw = grw
+	}()
+
 	stmt = &ReturnStatement{}
 
 	// The next query part can be any expression

sql/run.go

@@ -16,6 +16,14 @@ package sql
 
 func (p *parser) parseRunStatement() (stmt *RunStatement, err error) {
 
+	grw := p.buf.rw
+
+	p.buf.rw = false
+
+	defer func() {
+		p.buf.rw = grw
+	}()
+
 	stmt = &RunStatement{}
 
 	stmt.Expr, err = p.parseExpr()

sql/select.go

@@ -16,6 +16,14 @@ package sql
 
 func (p *parser) parseSelectStatement() (stmt *SelectStatement, err error) {
 
+	grw := p.buf.rw
+
+	p.buf.rw = false
+
+	defer func() {
+		p.buf.rw = grw
+	}()
+
 	stmt = &SelectStatement{}
 
 	if stmt.Expr, err = p.parseFields(); err != nil {

sql/sql_test.go

@@ -2450,6 +2450,36 @@ func Test_Parse_Queries_Define(t *testing.T) {
 				Name: &Ident{"test"},
 				Connect: &SubExpression{
 					Expr: &SelectStatement{
+						RW:       false,
+						Expr:     []*Field{{Expr: &All{}, Field: "*"}},
+						What:     []Expr{&Param{"id"}},
+						Parallel: true,
+					},
+				},
+			}}},
+		},
+		{
+			sql: `DEFINE SCOPE test SIGNUP AS (CREATE tester) SIGNIN AS (SELECT * FROM tester) CONNECT AS (SELECT * FROM $id)`,
+			res: &Query{Statements: []Statement{&DefineScopeStatement{
+				Name: &Ident{"test"},
+				Signup: &SubExpression{
+					Expr: &CreateStatement{
+						What:     []Expr{&Ident{"tester"}},
+						Echo:     AFTER,
+						Parallel: true,
+					},
+				},
+				Signin: &SubExpression{
+					Expr: &SelectStatement{
+						RW:       false,
+						Expr:     []*Field{{Expr: &All{}, Field: "*"}},
+						What:     []Expr{&Ident{"tester"}},
+						Parallel: true,
+					},
+				},
+				Connect: &SubExpression{
+					Expr: &SelectStatement{
+						RW:       false,
 						Expr:     []*Field{{Expr: &All{}, Field: "*"}},
 						What:     []Expr{&Param{"id"}},
 						Parallel: true,