Implement DROP VIEW statement

ast/ast.go

@@ -55,6 +55,7 @@ func (CreateDatabase) isStatement()     {}
 func (CreateTable) isStatement()        {}
 func (CreateSequence) isStatement()     {}
 func (CreateView) isStatement()         {}
+func (DropView) isStatement()           {}
 func (CreateIndex) isStatement()        {}
 func (CreateVectorIndex) isStatement()  {}
 func (CreateRole) isStatement()         {}
@@ -256,6 +257,7 @@ type DDL interface {
 func (CreateDatabase) isDDL()     {}
 func (CreateTable) isDDL()        {}
 func (CreateView) isDDL()         {}
+func (DropView) isDDL()           {}
 func (CreateSequence) isDDL()     {}
 func (AlterTable) isDDL()         {}
 func (DropTable) isDDL()          {}
@@ -1797,6 +1799,18 @@ type CreateView struct {
 	Query        QueryExpr
 }
 
+// DropView is DROP VIEW statement node.
+//
+//	DROP VIEW {{.Name | sql}}
+type DropView struct {
+	// pos = Drop
+	// end = Name.end
+
+	Drop token.Pos
+
+	Name *Ident
+}
+
 // AlterTable is ALTER TABLE statement node.
 //
 //	ALTER TABLE {{.Name | sql}} {{.TableAlteration | sql}}

ast/ast_test.go

@@ -136,6 +136,7 @@ func TestDDL(t *testing.T) {
 	DDL(&AlterSequence{}).isDDL()
 	DDL(&DropSequence{}).isDDL()
 	DDL(&CreateView{}).isDDL()
+	DDL(&DropView{}).isDDL()
 	DDL(&AlterTable{}).isDDL()
 	DDL(&DropTable{}).isDDL()
 	DDL(&CreateIndex{}).isDDL()

ast/pos.go

@@ -574,6 +574,9 @@ func (c *CreateView) End() token.Pos {
 	return c.Query.End()
 }
 
+func (d *DropView) Pos() token.Pos { return d.Drop }
+func (d *DropView) End() token.Pos { return d.Name.End() }
+
 func (c *ColumnDef) Pos() token.Pos {
 	return c.Name.Pos()
 }

ast/sql.go

@@ -828,6 +828,8 @@ func (c *CreateView) SQL() string {
 	return sql
 }
 
+func (d *DropView) SQL() string { return "DROP VIEW " + d.Name.SQL() }
+
 func (c *ColumnDef) SQL() string {
 	sql := c.Name.SQL() + " " + c.Type.SQL()
 	if c.NotNull {

parser.go

@@ -2160,6 +2160,8 @@ func (p *Parser) parseDDL() ast.DDL {
 			return p.parseDropVectorIndex(pos)
 		case p.Token.IsKeywordLike("SEQUENCE"):
 			return p.parseDropSequence(pos)
+		case p.Token.IsKeywordLike("VIEW"):
+			return p.parseDropView(pos)
 		case p.Token.IsKeywordLike("ROLE"):
 			return p.parseDropRole(pos)
 		case p.Token.IsKeywordLike("CHANGE"):
@@ -2314,6 +2316,16 @@ func (p *Parser) parseCreateView(pos token.Pos) *ast.CreateView {
 	}
 }
 
+func (p *Parser) parseDropView(pos token.Pos) *ast.DropView {
+	p.expectKeywordLike("VIEW")
+	name := p.parseIdent()
+
+	return &ast.DropView{
+		Drop: pos,
+		Name: name,
+	}
+}
+
 func (p *Parser) parseColumnDef() *ast.ColumnDef {
 	name := p.parseIdent()
 	t, notNull, null := p.parseTypeNotNull()

testdata/input/ddl/drop_view.sql

@@ -0,0 +1 @@
+DROP VIEW SingersView

testdata/result/ddl/drop_view.sql.txt

@@ -0,0 +1,14 @@
+--- drop_view.sql
+DROP VIEW SingersView
+--- AST
+&ast.DropView{
+  Drop: 0,
+  Name: &ast.Ident{
+    NamePos: 10,
+    NameEnd: 21,
+    Name:    "SingersView",
+  },
+}
+
+--- SQL
+DROP VIEW SingersView

testdata/result/statement/drop_view.sql.txt

@@ -0,0 +1,14 @@
+--- drop_view.sql
+DROP VIEW SingersView
+--- AST
+&ast.DropView{
+  Drop: 0,
+  Name: &ast.Ident{
+    NamePos: 10,
+    NameEnd: 21,
+    Name:    "SingersView",
+  },
+}
+
+--- SQL
+DROP VIEW SingersView