diff --git a/parser/ast.go b/parser/ast.go
index 9169d46..8732a79 100644
--- a/parser/ast.go
+++ b/parser/ast.go
@@ -356,6 +356,106 @@ func (a *AlterTableDropPartition) Accept(visitor ASTVisitor) error {
 	return visitor.VisitAlterTableDropPartition(a)
 }
 
+type AlterTableMaterializeProjection struct {
+	MaterializedPos Pos
+	StatementEnd    Pos
+	IfExists        bool
+	ProjectionName  *NestedIdentifier
+	Partition       *PartitionExpr
+}
+
+func (a *AlterTableMaterializeProjection) Pos() Pos {
+	return a.MaterializedPos
+}
+
+func (a *AlterTableMaterializeProjection) End() Pos {
+	return a.StatementEnd
+}
+
+func (a *AlterTableMaterializeProjection) AlterType() string {
+	return "MATERIALIZE_PROJECTION"
+}
+
+func (a *AlterTableMaterializeProjection) String(level int) string {
+	var builder strings.Builder
+	builder.WriteString("MATERIALIZE PROJECTION")
+
+	if a.IfExists {
+		builder.WriteString(" IF EXISTS")
+	}
+	builder.WriteString(" ")
+	builder.WriteString(a.ProjectionName.String(level))
+	if a.Partition != nil {
+		builder.WriteString(" IN ")
+		builder.WriteString(a.Partition.String(level))
+	}
+	return builder.String()
+}
+
+func (a *AlterTableMaterializeProjection) Accept(visitor ASTVisitor) error {
+	visitor.enter(a)
+	defer visitor.leave(a)
+	if err := a.ProjectionName.Accept(visitor); err != nil {
+		return err
+	}
+	if a.Partition != nil {
+		if err := a.Partition.Accept(visitor); err != nil {
+			return err
+		}
+	}
+	return visitor.VisitAlterTableMaterializeProjection(a)
+}
+
+type AlterTableMaterializeIndex struct {
+	MaterializedPos Pos
+	StatementEnd    Pos
+	IfExists        bool
+	IndexName       *NestedIdentifier
+	Partition       *PartitionExpr
+}
+
+func (a *AlterTableMaterializeIndex) Pos() Pos {
+	return a.MaterializedPos
+}
+
+func (a *AlterTableMaterializeIndex) End() Pos {
+	return a.StatementEnd
+}
+
+func (a *AlterTableMaterializeIndex) AlterType() string {
+	return "MATERIALIZE_INDEX"
+}
+
+func (a *AlterTableMaterializeIndex) String(level int) string {
+	var builder strings.Builder
+	builder.WriteString("MATERIALIZE INDEX")
+
+	if a.IfExists {
+		builder.WriteString(" IF EXISTS")
+	}
+	builder.WriteString(" ")
+	builder.WriteString(a.IndexName.String(level))
+	if a.Partition != nil {
+		builder.WriteString(" IN ")
+		builder.WriteString(a.Partition.String(level))
+	}
+	return builder.String()
+}
+
+func (a *AlterTableMaterializeIndex) Accept(visitor ASTVisitor) error {
+	visitor.enter(a)
+	defer visitor.leave(a)
+	if err := a.IndexName.Accept(visitor); err != nil {
+		return err
+	}
+	if a.Partition != nil {
+		if err := a.Partition.Accept(visitor); err != nil {
+			return err
+		}
+	}
+	return visitor.VisitAlterTableMaterializeIndex(a)
+}
+
 type AlterTableFreezePartition struct {
 	FreezePos    Pos
 	StatementEnd Pos
diff --git a/parser/ast_visitor.go b/parser/ast_visitor.go
index 3df2a8a..614934b 100644
--- a/parser/ast_visitor.go
+++ b/parser/ast_visitor.go
@@ -22,6 +22,8 @@ type ASTVisitor interface {
 	VisitAlterTableClearColumn(expr *AlterTableClearColumn) error
 	VisitAlterTableClearIndex(expr *AlterTableClearIndex) error
 	VisitAlterTableClearProjection(expr *AlterTableClearProjection) error
+	VisitAlterTableMaterializeIndex(expr *AlterTableMaterializeIndex) error
+	VisitAlterTableMaterializeProjection(expr *AlterTableMaterializeProjection) error
 	VisitAlterTableRenameColumn(expr *AlterTableRenameColumn) error
 	VisitAlterTableModifyTTL(expr *AlterTableModifyTTL) error
 	VisitAlterTableModifyColumn(expr *AlterTableModifyColumn) error
@@ -315,6 +317,20 @@ func (v *DefaultASTVisitor) VisitAlterTableClearProjection(expr *AlterTableClear
 	return nil
 }
 
+func (v *DefaultASTVisitor) VisitAlterTableMaterializeProjection(expr *AlterTableMaterializeProjection) error {
+	if v.Visit != nil {
+		return v.Visit(expr)
+	}
+	return nil
+}
+
+func (v *DefaultASTVisitor) VisitAlterTableMaterializeIndex(expr *AlterTableMaterializeIndex) error {
+	if v.Visit != nil {
+		return v.Visit(expr)
+	}
+	return nil
+}
+
 func (v *DefaultASTVisitor) VisitAlterTableRenameColumn(expr *AlterTableRenameColumn) error {
 	if v.Visit != nil {
 		return v.Visit(expr)
diff --git a/parser/parser_alter.go b/parser/parser_alter.go
index dc1762a..20360fc 100644
--- a/parser/parser_alter.go
+++ b/parser/parser_alter.go
@@ -49,7 +49,8 @@ func (p *Parser) parseAlterTable(pos Pos) (*AlterTable, error) {
 			alterExpr, err = p.parseAlterTableModify(p.Pos())
 		case p.matchKeyword(KeywordReplace):
 			alterExpr, err = p.parseAlterTableReplacePartition(p.Pos())
-
+		case p.matchKeyword(KeywordMaterialize):
+			alterExpr, err = p.parseAlterTableMaterialize(p.Pos())
 		default:
 			return nil, errors.New("expected token: ADD|DROP|ATTACH|DETACH|FREEZE|REMOVE|CLEAR")
 		}
@@ -709,3 +710,53 @@ func (p *Parser) parseAlterTableReplacePartition(pos Pos) (AlterTableExpr, error
 		Table:      table,
 	}, nil
 }
+
+func (p *Parser) parseAlterTableMaterialize(pos Pos) (AlterTableExpr, error) {
+	if err := p.consumeKeyword(KeywordMaterialize); err != nil {
+		return nil, err
+	}
+	var kind string
+	switch {
+	case p.matchKeyword(KeywordIndex):
+		kind = KeywordIndex
+	case p.matchKeyword(KeywordProjection):
+		kind = KeywordProjection
+	default:
+		return nil, fmt.Errorf("expected keyword: INDEX|PROJECTION, but got %q", p.lastTokenKind())
+	}
+	_ = p.lexer.consumeToken()
+
+	ifExists, err := p.tryParseIfExists()
+	if err != nil {
+		return nil, err
+	}
+	name, err := p.ParseNestedIdentifier(p.Pos())
+	if err != nil {
+		return nil, err
+	}
+	statementEnd := name.End()
+	var partitionExpr *PartitionExpr
+	if p.tryConsumeKeyword(KeywordIn) != nil {
+		partitionExpr, err = p.tryParsePartitionExpr(p.Pos())
+		if err != nil {
+			return nil, err
+		}
+		statementEnd = partitionExpr.End()
+	}
+	if kind == KeywordIndex {
+		return &AlterTableMaterializeIndex{
+			MaterializedPos: pos,
+			StatementEnd:    statementEnd,
+			IfExists:        ifExists,
+			IndexName:       name,
+			Partition:       partitionExpr,
+		}, nil
+	}
+	return &AlterTableMaterializeProjection{
+		MaterializedPos: pos,
+		StatementEnd:    statementEnd,
+		IfExists:        ifExists,
+		ProjectionName:  name,
+		Partition:       partitionExpr,
+	}, nil
+}
diff --git a/parser/testdata/ddl/alter_table_materialize_index.sql b/parser/testdata/ddl/alter_table_materialize_index.sql
new file mode 100644
index 0000000..6fde94a
--- /dev/null
+++ b/parser/testdata/ddl/alter_table_materialize_index.sql
@@ -0,0 +1,2 @@
+ALTER TABLE visits_order MATERIALIZE INDEX IF EXISTS user_name_index IN PARTITION '20240403';
+
diff --git a/parser/testdata/ddl/alter_table_materialize_projection.sql b/parser/testdata/ddl/alter_table_materialize_projection.sql
new file mode 100644
index 0000000..f2fa4cf
--- /dev/null
+++ b/parser/testdata/ddl/alter_table_materialize_projection.sql
@@ -0,0 +1,2 @@
+ALTER TABLE visits_order MATERIALIZE PROJECTION IF EXISTS user_name_projection IN PARTITION '20240403';
+
diff --git a/parser/testdata/ddl/format/alter_table_materialize_index.sql b/parser/testdata/ddl/format/alter_table_materialize_index.sql
new file mode 100644
index 0000000..9caa420
--- /dev/null
+++ b/parser/testdata/ddl/format/alter_table_materialize_index.sql
@@ -0,0 +1,8 @@
+-- Origin SQL:
+ALTER TABLE visits_order MATERIALIZE INDEX IF EXISTS user_name_index IN PARTITION '20240403';
+
+
+
+-- Format SQL:
+ALTER TABLE visits_order
+MATERIALIZE INDEX IF EXISTS user_name_index IN PARTITION '20240403';
diff --git a/parser/testdata/ddl/format/alter_table_materialize_projection.sql b/parser/testdata/ddl/format/alter_table_materialize_projection.sql
new file mode 100644
index 0000000..4effe81
--- /dev/null
+++ b/parser/testdata/ddl/format/alter_table_materialize_projection.sql
@@ -0,0 +1,8 @@
+-- Origin SQL:
+ALTER TABLE visits_order MATERIALIZE PROJECTION IF EXISTS user_name_projection IN PARTITION '20240403';
+
+
+
+-- Format SQL:
+ALTER TABLE visits_order
+MATERIALIZE PROJECTION IF EXISTS user_name_projection IN PARTITION '20240403';
diff --git a/parser/testdata/ddl/output/alter_table_materialize_index.sql.golden.json b/parser/testdata/ddl/output/alter_table_materialize_index.sql.golden.json
new file mode 100644
index 0000000..3db7173
--- /dev/null
+++ b/parser/testdata/ddl/output/alter_table_materialize_index.sql.golden.json
@@ -0,0 +1,42 @@
+[
+  {
+    "AlterPos": 0,
+    "StatementEnd": 91,
+    "TableIdentifier": {
+      "Database": null,
+      "Table": {
+        "Name": "visits_order",
+        "QuoteType": 1,
+        "NamePos": 12,
+        "NameEnd": 24
+      }
+    },
+    "OnCluster": null,
+    "AlterExprs": [
+      {
+        "MaterializedPos": 25,
+        "StatementEnd": 91,
+        "IfExists": true,
+        "IndexName": {
+          "Ident": {
+            "Name": "user_name_index",
+            "QuoteType": 1,
+            "NamePos": 53,
+            "NameEnd": 68
+          },
+          "DotIdent": null
+        },
+        "Partition": {
+          "PartitionPos": 72,
+          "Expr": {
+            "LiteralPos": 83,
+            "LiteralEnd": 91,
+            "Literal": "20240403"
+          },
+          "ID": null,
+          "All": false
+        }
+      }
+    ]
+  }
+]
\ No newline at end of file
diff --git a/parser/testdata/ddl/output/alter_table_materialize_projection.sql.golden.json b/parser/testdata/ddl/output/alter_table_materialize_projection.sql.golden.json
new file mode 100644
index 0000000..cb964c5
--- /dev/null
+++ b/parser/testdata/ddl/output/alter_table_materialize_projection.sql.golden.json
@@ -0,0 +1,42 @@
+[
+  {
+    "AlterPos": 0,
+    "StatementEnd": 101,
+    "TableIdentifier": {
+      "Database": null,
+      "Table": {
+        "Name": "visits_order",
+        "QuoteType": 1,
+        "NamePos": 12,
+        "NameEnd": 24
+      }
+    },
+    "OnCluster": null,
+    "AlterExprs": [
+      {
+        "MaterializedPos": 25,
+        "StatementEnd": 101,
+        "IfExists": true,
+        "ProjectionName": {
+          "Ident": {
+            "Name": "user_name_projection",
+            "QuoteType": 1,
+            "NamePos": 58,
+            "NameEnd": 78
+          },
+          "DotIdent": null
+        },
+        "Partition": {
+          "PartitionPos": 82,
+          "Expr": {
+            "LiteralPos": 93,
+            "LiteralEnd": 101,
+            "Literal": "20240403"
+          },
+          "ID": null,
+          "All": false
+        }
+      }
+    ]
+  }
+]
\ No newline at end of file