diff --git a/docs/generated/sql/bnf/col_qualification.bnf b/docs/generated/sql/bnf/col_qualification.bnf
index 2abaaa68cb03..dd766c1229b7 100644
--- a/docs/generated/sql/bnf/col_qualification.bnf
+++ b/docs/generated/sql/bnf/col_qualification.bnf
@@ -1,7 +1,7 @@
 col_qualification ::=
 	'CONSTRAINT' constraint_name 'NOT' 'NULL'
 	| 'CONSTRAINT' constraint_name 'NULL'
-	| 'CONSTRAINT' constraint_name 'UNIQUE'
+	| 'CONSTRAINT' constraint_name 'UNIQUE' opt_without_index
 	| 'CONSTRAINT' constraint_name 'PRIMARY' 'KEY'
 	| 'CONSTRAINT' constraint_name 'PRIMARY' 'KEY' 'USING' 'HASH' 'WITH' 'BUCKET_COUNT' '=' n_buckets
 	| 'CONSTRAINT' constraint_name 'CHECK' '(' a_expr ')'
@@ -10,7 +10,7 @@ col_qualification ::=
 	| 'CONSTRAINT' constraint_name generated_as '(' a_expr ')' 'STORED'
 	| 'NOT' 'NULL'
 	| 'NULL'
-	| 'UNIQUE'
+	| 'UNIQUE' opt_without_index
 	| 'PRIMARY' 'KEY'
 	| 'PRIMARY' 'KEY' 'USING' 'HASH' 'WITH' 'BUCKET_COUNT' '=' n_buckets
 	| 'CHECK' '(' a_expr ')'
diff --git a/docs/generated/sql/bnf/stmt_block.bnf b/docs/generated/sql/bnf/stmt_block.bnf
index 6b4d63c86ac8..bdb6f1f57b07 100644
--- a/docs/generated/sql/bnf/stmt_block.bnf
+++ b/docs/generated/sql/bnf/stmt_block.bnf
@@ -2198,7 +2198,7 @@ constraint_name ::=
 
 constraint_elem ::=
 	'CHECK' '(' a_expr ')'
-	| 'UNIQUE' '(' index_params ')' opt_storing opt_interleave opt_partition_by opt_where_clause
+	| 'UNIQUE' opt_without_index '(' index_params ')' opt_storing opt_interleave opt_partition_by opt_where_clause
 	| 'PRIMARY' 'KEY' '(' index_params ')' opt_hash_sharded opt_interleave
 	| 'FOREIGN' 'KEY' '(' name_list ')' 'REFERENCES' table_name opt_column_list key_match reference_actions
 
@@ -2487,6 +2487,10 @@ col_qualification ::=
 	| 'CREATE' 'FAMILY'
 	| 'CREATE' 'IF' 'NOT' 'EXISTS' 'FAMILY' family_name
 
+opt_without_index ::=
+	'WITHOUT' 'INDEX'
+	| 
+
 key_match ::=
 	'MATCH' 'SIMPLE'
 	| 'MATCH' 'FULL'
@@ -2730,7 +2734,7 @@ create_as_constraint_elem ::=
 col_qualification_elem ::=
 	'NOT' 'NULL'
 	| 'NULL'
-	| 'UNIQUE'
+	| 'UNIQUE' opt_without_index
 	| 'PRIMARY' 'KEY'
 	| 'PRIMARY' 'KEY' 'USING' 'HASH' 'WITH' 'BUCKET_COUNT' '=' a_expr
 	| 'CHECK' '(' a_expr ')'
diff --git a/docs/generated/sql/bnf/table_constraint.bnf b/docs/generated/sql/bnf/table_constraint.bnf
index 97986219e3b5..aae6bf3e3863 100644
--- a/docs/generated/sql/bnf/table_constraint.bnf
+++ b/docs/generated/sql/bnf/table_constraint.bnf
@@ -1,17 +1,17 @@
 table_constraint ::=
 	'CONSTRAINT' constraint_name 'CHECK' '(' a_expr ')'
-	| 'CONSTRAINT' constraint_name 'UNIQUE' '(' index_params ')' 'COVERING' '(' name_list ')' opt_interleave opt_partition_by opt_where_clause
-	| 'CONSTRAINT' constraint_name 'UNIQUE' '(' index_params ')' 'STORING' '(' name_list ')' opt_interleave opt_partition_by opt_where_clause
-	| 'CONSTRAINT' constraint_name 'UNIQUE' '(' index_params ')' 'INCLUDE' '(' name_list ')' opt_interleave opt_partition_by opt_where_clause
-	| 'CONSTRAINT' constraint_name 'UNIQUE' '(' index_params ')'  opt_interleave opt_partition_by opt_where_clause
+	| 'CONSTRAINT' constraint_name 'UNIQUE' opt_without_index '(' index_params ')' 'COVERING' '(' name_list ')' opt_interleave opt_partition_by opt_where_clause
+	| 'CONSTRAINT' constraint_name 'UNIQUE' opt_without_index '(' index_params ')' 'STORING' '(' name_list ')' opt_interleave opt_partition_by opt_where_clause
+	| 'CONSTRAINT' constraint_name 'UNIQUE' opt_without_index '(' index_params ')' 'INCLUDE' '(' name_list ')' opt_interleave opt_partition_by opt_where_clause
+	| 'CONSTRAINT' constraint_name 'UNIQUE' opt_without_index '(' index_params ')'  opt_interleave opt_partition_by opt_where_clause
 	| 'CONSTRAINT' constraint_name 'PRIMARY' 'KEY' '(' index_params ')' 'USING' 'HASH' 'WITH' 'BUCKET_COUNT' '=' n_buckets opt_interleave
 	| 'CONSTRAINT' constraint_name 'PRIMARY' 'KEY' '(' index_params ')'  opt_interleave
 	| 'CONSTRAINT' constraint_name 'FOREIGN' 'KEY' '(' name_list ')' 'REFERENCES' table_name opt_column_list key_match reference_actions
 	| 'CHECK' '(' a_expr ')'
-	| 'UNIQUE' '(' index_params ')' 'COVERING' '(' name_list ')' opt_interleave opt_partition_by opt_where_clause
-	| 'UNIQUE' '(' index_params ')' 'STORING' '(' name_list ')' opt_interleave opt_partition_by opt_where_clause
-	| 'UNIQUE' '(' index_params ')' 'INCLUDE' '(' name_list ')' opt_interleave opt_partition_by opt_where_clause
-	| 'UNIQUE' '(' index_params ')'  opt_interleave opt_partition_by opt_where_clause
+	| 'UNIQUE' opt_without_index '(' index_params ')' 'COVERING' '(' name_list ')' opt_interleave opt_partition_by opt_where_clause
+	| 'UNIQUE' opt_without_index '(' index_params ')' 'STORING' '(' name_list ')' opt_interleave opt_partition_by opt_where_clause
+	| 'UNIQUE' opt_without_index '(' index_params ')' 'INCLUDE' '(' name_list ')' opt_interleave opt_partition_by opt_where_clause
+	| 'UNIQUE' opt_without_index '(' index_params ')'  opt_interleave opt_partition_by opt_where_clause
 	| 'PRIMARY' 'KEY' '(' index_params ')' 'USING' 'HASH' 'WITH' 'BUCKET_COUNT' '=' n_buckets opt_interleave
 	| 'PRIMARY' 'KEY' '(' index_params ')'  opt_interleave
 	| 'FOREIGN' 'KEY' '(' name_list ')' 'REFERENCES' table_name opt_column_list key_match reference_actions
diff --git a/pkg/sql/alter_table.go b/pkg/sql/alter_table.go
index 6d1d437f3495..1c19a63ce505 100644
--- a/pkg/sql/alter_table.go
+++ b/pkg/sql/alter_table.go
@@ -163,6 +163,11 @@ func (n *alterTableNode) startExec(params runParams) error {
 		case *tree.AlterTableAddConstraint:
 			switch d := t.ConstraintDef.(type) {
 			case *tree.UniqueConstraintTableDef:
+				if d.NoIndex {
+					return pgerror.New(pgcode.FeatureNotSupported,
+						"unique constraints without an index are not yet supported",
+					)
+				}
 				if d.PrimaryKey {
 					// We only support "adding" a primary key when we are using the
 					// default rowid primary index or if a DROP PRIMARY KEY statement
diff --git a/pkg/sql/catalog/tabledesc/table.go b/pkg/sql/catalog/tabledesc/table.go
index 5b06a9448dcf..535ac08f9a17 100644
--- a/pkg/sql/catalog/tabledesc/table.go
+++ b/pkg/sql/catalog/tabledesc/table.go
@@ -64,6 +64,11 @@ func MakeColumnDefDescs(
 		// Should never happen since `HoistConstraints` moves these to table level
 		return nil, nil, nil, errors.New("unexpected column REFERENCED constraint")
 	}
+	if d.UniqueNoIndex {
+		return nil, nil, nil, pgerror.New(pgcode.FeatureNotSupported,
+			"unique constraints without an index are not yet supported",
+		)
+	}
 
 	col := &descpb.ColumnDescriptor{
 		Name:     string(d.Name),
@@ -107,7 +112,7 @@ func MakeColumnDefDescs(
 	}
 
 	var idx *descpb.IndexDescriptor
-	if d.PrimaryKey.IsPrimaryKey || d.Unique {
+	if d.PrimaryKey.IsPrimaryKey || (d.Unique && !d.UniqueNoIndex) {
 		if !d.PrimaryKey.Sharded {
 			idx = &descpb.IndexDescriptor{
 				Unique:           true,
diff --git a/pkg/sql/create_table.go b/pkg/sql/create_table.go
index 2682547fba3a..9a93961d784a 100644
--- a/pkg/sql/create_table.go
+++ b/pkg/sql/create_table.go
@@ -1468,6 +1468,11 @@ func NewTableDesc(
 				return nil, unimplemented.NewWithIssue(9148, "use CREATE INDEX to make interleaved indexes")
 			}
 		case *tree.UniqueConstraintTableDef:
+			if d.NoIndex {
+				return nil, pgerror.New(pgcode.FeatureNotSupported,
+					"unique constraints without an index are not yet supported",
+				)
+			}
 			idx := descpb.IndexDescriptor{
 				Name:             string(d.Name),
 				Unique:           true,
@@ -2077,7 +2082,11 @@ func incTelemetryForNewColumn(def *tree.ColumnTableDef, desc *descpb.ColumnDescr
 		telemetry.Inc(sqltelemetry.SchemaNewColumnTypeQualificationCounter("default_expr"))
 	}
 	if def.Unique {
-		telemetry.Inc(sqltelemetry.SchemaNewColumnTypeQualificationCounter("unique"))
+		if def.UniqueNoIndex {
+			telemetry.Inc(sqltelemetry.SchemaNewColumnTypeQualificationCounter("unique_without_index"))
+		} else {
+			telemetry.Inc(sqltelemetry.SchemaNewColumnTypeQualificationCounter("unique"))
+		}
 	}
 }
 
diff --git a/pkg/sql/logictest/testdata/logic_test/alter_table b/pkg/sql/logictest/testdata/logic_test/alter_table
index 7916c2ebd0f5..9ce3ffd637b7 100644
--- a/pkg/sql/logictest/testdata/logic_test/alter_table
+++ b/pkg/sql/logictest/testdata/logic_test/alter_table
@@ -1401,3 +1401,17 @@ ALTER TABLE t_cannot_rename_constraint_over_index RENAME CONSTRAINT v_unique TO
 
 statement error relation idx_v already exists
 ALTER TABLE t_cannot_rename_constraint_over_index RENAME CONSTRAINT "primary" TO idx_v;
+
+subtest unique_without_index
+
+statement ok
+CREATE TABLE unique_without_index (
+  a INT,
+  b INT
+)
+
+statement error unique constraints without an index are not yet supported
+ALTER TABLE unique_without_index ADD COLUMN c INT UNIQUE WITHOUT INDEX
+
+statement error unique constraints without an index are not yet supported
+ALTER TABLE unique_without_index ADD CONSTRAINT ab UNIQUE WITHOUT INDEX (a, b)
diff --git a/pkg/sql/logictest/testdata/logic_test/create_table b/pkg/sql/logictest/testdata/logic_test/create_table
index f5c65367fe4b..0fb09a2f5d71 100644
--- a/pkg/sql/logictest/testdata/logic_test/create_table
+++ b/pkg/sql/logictest/testdata/logic_test/create_table
@@ -316,3 +316,11 @@ CREATE TABLE error (LIKE like_hash_base INCLUDING STATISTICS)
 
 statement error unimplemented
 CREATE TABLE error (LIKE like_hash_base INCLUDING STORAGE)
+
+subtest unique_without_index
+
+statement error unique constraints without an index are not yet supported
+CREATE TABLE unique_without_index (a INT UNIQUE WITHOUT INDEX)
+
+statement error unique constraints without an index are not yet supported
+CREATE TABLE unique_without_index (a INT, b INT, CONSTRAINT ab UNIQUE WITHOUT INDEX (a, b))
diff --git a/pkg/sql/mutations/mutations.go b/pkg/sql/mutations/mutations.go
index c4452384bb0e..d952c5fae1b2 100644
--- a/pkg/sql/mutations/mutations.go
+++ b/pkg/sql/mutations/mutations.go
@@ -278,13 +278,15 @@ func statisticsMutator(
 					DistinctCount: distinctCount,
 					NullCount:     nullCount,
 				}
-				if def.Unique || def.PrimaryKey.IsPrimaryKey {
+				if (def.Unique && !def.UniqueNoIndex) || def.PrimaryKey.IsPrimaryKey {
 					makeHistogram(def)
 				}
 			case *tree.IndexTableDef:
 				makeHistogram(cols[def.Columns[0].Column])
 			case *tree.UniqueConstraintTableDef:
-				makeHistogram(cols[def.Columns[0].Column])
+				if !def.NoIndex {
+					makeHistogram(cols[def.Columns[0].Column])
+				}
 			}
 		}
 		if len(colStats) > 0 {
@@ -569,6 +571,10 @@ var postgresStatementMutator MultiStatementMutation = func(rng *rand.Rand, stmts
 						def.Family.Create = false
 						changed = true
 					}
+					if def.UniqueNoIndex {
+						def.UniqueNoIndex = false
+						changed = true
+					}
 				case *tree.UniqueConstraintTableDef:
 					if def.Interleave != nil {
 						def.Interleave = nil
@@ -578,6 +584,10 @@ var postgresStatementMutator MultiStatementMutation = func(rng *rand.Rand, stmts
 						def.PartitionBy = nil
 						changed = true
 					}
+					if def.NoIndex {
+						def.NoIndex = false
+						changed = true
+					}
 				}
 			}
 		case *tree.AlterTable:
diff --git a/pkg/sql/opt/testutils/testcat/create_table.go b/pkg/sql/opt/testutils/testcat/create_table.go
index 410088aad141..20d86a03ce51 100644
--- a/pkg/sql/opt/testutils/testcat/create_table.go
+++ b/pkg/sql/opt/testutils/testcat/create_table.go
@@ -18,6 +18,8 @@ import (
 	"github.com/cockroachdb/cockroach/pkg/geo/geoindex"
 	"github.com/cockroachdb/cockroach/pkg/sql/catalog/colinfo"
 	"github.com/cockroachdb/cockroach/pkg/sql/opt/cat"
+	"github.com/cockroachdb/cockroach/pkg/sql/pgwire/pgcode"
+	"github.com/cockroachdb/cockroach/pkg/sql/pgwire/pgerror"
 	"github.com/cockroachdb/cockroach/pkg/sql/sem/tree"
 	"github.com/cockroachdb/cockroach/pkg/sql/types"
 	"github.com/cockroachdb/cockroach/pkg/util"
@@ -178,6 +180,11 @@ func (tc *Catalog) CreateTable(stmt *tree.CreateTable) *Table {
 	for _, def := range stmt.Defs {
 		switch def := def.(type) {
 		case *tree.UniqueConstraintTableDef:
+			if def.NoIndex {
+				panic(pgerror.New(pgcode.FeatureNotSupported,
+					"unique constraints without an index are not yet supported",
+				))
+			}
 			if !def.PrimaryKey {
 				tab.addIndex(&def.IndexTableDef, uniqueIndex)
 			}
@@ -189,6 +196,11 @@ func (tc *Catalog) CreateTable(stmt *tree.CreateTable) *Table {
 			tab.addFamily(def)
 
 		case *tree.ColumnTableDef:
+			if def.UniqueNoIndex {
+				panic(pgerror.New(pgcode.FeatureNotSupported,
+					"unique constraints without an index are not yet supported",
+				))
+			}
 			if def.Unique {
 				tab.addIndex(
 					&tree.IndexTableDef{
diff --git a/pkg/sql/parser/parse_test.go b/pkg/sql/parser/parse_test.go
index d72f7e4077d5..66b6bd150b83 100644
--- a/pkg/sql/parser/parse_test.go
+++ b/pkg/sql/parser/parse_test.go
@@ -176,6 +176,7 @@ func TestParse(t *testing.T) {
 		{`CREATE TABLE a (b INT8 CONSTRAINT always NOT NULL)`},
 		{`CREATE TABLE a (b INT8 PRIMARY KEY)`},
 		{`CREATE TABLE a (b INT8 UNIQUE)`},
+		{`CREATE TABLE a (b INT8 UNIQUE WITHOUT INDEX)`},
 		{`CREATE TABLE a (b INT8 NULL PRIMARY KEY)`},
 		{`CREATE TABLE a (b INT8 DEFAULT 1)`},
 		{`CREATE TABLE a (b INT8 CONSTRAINT one DEFAULT 1)`},
@@ -223,6 +224,7 @@ func TestParse(t *testing.T) {
 		{`CREATE TABLE a (b INT8, c STRING, INDEX (b, c))`},
 		{`CREATE TABLE a (b INT8, c STRING, INDEX d (b, c))`},
 		{`CREATE TABLE a (b INT8, c STRING, CONSTRAINT d UNIQUE (b, c))`},
+		{`CREATE TABLE a (b INT8, c STRING, CONSTRAINT d UNIQUE WITHOUT INDEX (b, c))`},
 		{`CREATE TABLE a (b INT8, c STRING, CONSTRAINT d UNIQUE (b, c) INTERLEAVE IN PARENT d (e, f))`},
 		{`CREATE TABLE a (b INT8, UNIQUE (b))`},
 		{`CREATE TABLE a (b INT8, UNIQUE (b) STORING (c))`},
@@ -271,6 +273,7 @@ func TestParse(t *testing.T) {
 		{`CREATE TABLE a (b INT8 CONSTRAINT c PRIMARY KEY)`},
 		{`CREATE TABLE a (b INT8 CONSTRAINT c NULL)`},
 		{`CREATE TABLE a (b INT8 CONSTRAINT c UNIQUE)`},
+		{`CREATE TABLE a (b INT8 CONSTRAINT c UNIQUE WITHOUT INDEX)`},
 		{`CREATE TABLE a (b INT8 CONSTRAINT c DEFAULT d)`},
 		{`CREATE TABLE a (b INT8 CONSTRAINT c CHECK (d))`},
 		{`CREATE TABLE a (b INT8 CONSTRAINT c REFERENCES d)`},
@@ -1351,7 +1354,7 @@ func TestParse(t *testing.T) {
 		{`ALTER TABLE a ADD COLUMN IF NOT EXISTS b INT8, ADD CONSTRAINT a_idx UNIQUE (a)`},
 		{`ALTER TABLE IF EXISTS a ADD COLUMN b INT8, ADD CONSTRAINT a_idx UNIQUE (a)`},
 		{`ALTER TABLE IF EXISTS a ADD COLUMN IF NOT EXISTS b INT8, ADD CONSTRAINT a_idx UNIQUE (a)`},
-		{`ALTER TABLE a ADD COLUMN b INT8, ADD CONSTRAINT a_idx UNIQUE (a)`},
+		{`ALTER TABLE a ADD COLUMN b INT8 UNIQUE WITHOUT INDEX, ADD CONSTRAINT a_no_idx UNIQUE WITHOUT INDEX (a)`},
 		{`ALTER TABLE a ADD COLUMN IF NOT EXISTS b INT8, ADD CONSTRAINT a_idx UNIQUE (a) NOT VALID`},
 		{`ALTER TABLE IF EXISTS a ADD COLUMN b INT8, ADD CONSTRAINT a_idx UNIQUE (a)`},
 		{`ALTER TABLE IF EXISTS a ADD COLUMN IF NOT EXISTS b INT8, ADD CONSTRAINT a_idx UNIQUE (a)`},
diff --git a/pkg/sql/parser/sql.y b/pkg/sql/parser/sql.y
index 5f574dbbb4ea..5ea2ea72279a 100644
--- a/pkg/sql/parser/sql.y
+++ b/pkg/sql/parser/sql.y
@@ -1020,7 +1020,7 @@ func (u *sqlSymUnion) refreshDataOption() tree.RefreshDataOption {
 %type <types.IntervalTypeMetadata> opt_interval_qualifier interval_qualifier interval_second
 %type <tree.Expr> overlay_placing
 
-%type <bool> opt_unique opt_concurrently opt_cluster
+%type <bool> opt_unique opt_concurrently opt_cluster opt_without_index
 %type <bool> opt_index_access_method
 
 %type <*tree.Limit> limit_clause offset_clause opt_limit_clause
@@ -1317,7 +1317,7 @@ alter_ddl_stmt:
 //   ALTER TABLE ... SET SCHEMA <newschemaname>
 //
 // Column qualifiers:
-//   [CONSTRAINT <constraintname>] {NULL | NOT NULL | UNIQUE | PRIMARY KEY | CHECK (<expr>) | DEFAULT <expr>}
+//   [CONSTRAINT <constraintname>] {NULL | NOT NULL | UNIQUE [WITHOUT INDEX] | PRIMARY KEY | CHECK (<expr>) | DEFAULT <expr>}
 //   FAMILY <familyname>, CREATE [IF NOT EXISTS] FAMILY [<familyname>]
 //   REFERENCES <tablename> [( <colnames...> )]
 //   COLLATE <collationname>
@@ -5426,11 +5426,11 @@ alter_schema_stmt:
 // Table constraints:
 //    PRIMARY KEY ( <colnames...> ) [USING HASH WITH BUCKET_COUNT = <shard_buckets>]
 //    FOREIGN KEY ( <colnames...> ) REFERENCES <tablename> [( <colnames...> )] [ON DELETE {NO ACTION | RESTRICT}] [ON UPDATE {NO ACTION | RESTRICT}]
-//    UNIQUE ( <colnames... ) [{STORING | INCLUDE | COVERING} ( <colnames...> )] [<interleave>]
+//    UNIQUE [WITHOUT INDEX] ( <colnames... ) [{STORING | INCLUDE | COVERING} ( <colnames...> )] [<interleave>]
 //    CHECK ( <expr> )
 //
 // Column qualifiers:
-//   [CONSTRAINT <constraintname>] {NULL | NOT NULL | UNIQUE | PRIMARY KEY | CHECK (<expr>) | DEFAULT <expr>}
+//   [CONSTRAINT <constraintname>] {NULL | NOT NULL | UNIQUE [WITHOUT INDEX] | PRIMARY KEY | CHECK (<expr>) | DEFAULT <expr>}
 //   FAMILY <familyname>, CREATE [IF NOT EXISTS] FAMILY [<familyname>]
 //   REFERENCES <tablename> [( <colnames...> )] [ON DELETE {NO ACTION | RESTRICT}] [ON UPDATE {NO ACTION | RESTRICT}]
 //   COLLATE <collationname>
@@ -5868,9 +5868,11 @@ col_qualification_elem:
   {
     $$.val = tree.NullConstraint{}
   }
-| UNIQUE
+| UNIQUE opt_without_index
   {
-    $$.val = tree.UniqueConstraint{}
+    $$.val = tree.UniqueConstraint{
+      NoIndex: $2.bool(),
+    }
   }
 | PRIMARY KEY
   {
@@ -5915,6 +5917,16 @@ col_qualification_elem:
     return 1
  }
 
+opt_without_index:
+  WITHOUT INDEX
+  {
+    $$.val = true
+  }
+| /* EMPTY */
+  {
+    $$.val = false
+  }
+
 // GENERATED ALWAYS is a noise word for compatibility with Postgres.
 generated_as:
   AS {}
@@ -5991,15 +6003,17 @@ constraint_elem:
       Expr: $3.expr(),
     }
   }
-| UNIQUE '(' index_params ')' opt_storing opt_interleave opt_partition_by opt_deferrable opt_where_clause
+| UNIQUE opt_without_index '(' index_params ')'
+    opt_storing opt_interleave opt_partition_by opt_deferrable opt_where_clause
   {
     $$.val = &tree.UniqueConstraintTableDef{
+      NoIndex: $2.bool(),
       IndexTableDef: tree.IndexTableDef{
-        Columns: $3.idxElems(),
-        Storing: $5.nameList(),
-        Interleave: $6.interleave(),
-        PartitionBy: $7.partitionBy(),
-        Predicate: $9.expr(),
+        Columns: $4.idxElems(),
+        Storing: $6.nameList(),
+        Interleave: $7.interleave(),
+        PartitionBy: $8.partitionBy(),
+        Predicate: $10.expr(),
       },
     }
   }
diff --git a/pkg/sql/rowenc/testutils.go b/pkg/sql/rowenc/testutils.go
index d463ded70a94..5f094d3f0b6f 100644
--- a/pkg/sql/rowenc/testutils.go
+++ b/pkg/sql/rowenc/testutils.go
@@ -1368,7 +1368,7 @@ func IndexStoringMutator(rng *rand.Rand, stmts []tree.Statement) ([]tree.Stateme
 				case *tree.IndexTableDef:
 					idx = defType
 				case *tree.UniqueConstraintTableDef:
-					if !defType.PrimaryKey {
+					if !defType.PrimaryKey && !defType.NoIndex {
 						idx = &defType.IndexTableDef
 					}
 				}
@@ -1422,7 +1422,7 @@ func PartialIndexMutator(rng *rand.Rand, stmts []tree.Statement) ([]tree.Stateme
 				case *tree.IndexTableDef:
 					idx = defType
 				case *tree.UniqueConstraintTableDef:
-					if !defType.PrimaryKey {
+					if !defType.PrimaryKey && !defType.NoIndex {
 						idx = &defType.IndexTableDef
 					}
 				}
diff --git a/pkg/sql/sem/tree/create.go b/pkg/sql/sem/tree/create.go
index ac11be23e0fe..032450b35f67 100644
--- a/pkg/sql/sem/tree/create.go
+++ b/pkg/sql/sem/tree/create.go
@@ -370,6 +370,7 @@ type ColumnTableDef struct {
 		ShardBuckets Expr
 	}
 	Unique               bool
+	UniqueNoIndex        bool
 	UniqueConstraintName Name
 	DefaultExpr          struct {
 		Expr           Expr
@@ -487,6 +488,7 @@ func NewColumnTableDef(
 			d.UniqueConstraintName = c.Name
 		case UniqueConstraint:
 			d.Unique = true
+			d.UniqueNoIndex = t.NoIndex
 			d.UniqueConstraintName = c.Name
 		case *ColumnCheckConstraint:
 			d.CheckExprs = append(d.CheckExprs, ColumnTableDefCheckExpr{
@@ -575,6 +577,9 @@ func (node *ColumnTableDef) Format(ctx *FmtCtx) {
 			}
 		} else if node.Unique {
 			ctx.WriteString(" UNIQUE")
+			if node.UniqueNoIndex {
+				ctx.WriteString(" WITHOUT INDEX")
+			}
 		}
 	}
 	if node.HasDefaultExpr() {
@@ -700,7 +705,9 @@ type ShardedPrimaryKeyConstraint struct {
 }
 
 // UniqueConstraint represents UNIQUE on a column.
-type UniqueConstraint struct{}
+type UniqueConstraint struct {
+	NoIndex bool
+}
 
 // ColumnCheckConstraint represents either a check on a column.
 type ColumnCheckConstraint struct {
@@ -800,6 +807,7 @@ func (*CheckConstraintTableDef) constraintTableDef()      {}
 type UniqueConstraintTableDef struct {
 	IndexTableDef
 	PrimaryKey bool
+	NoIndex    bool
 }
 
 // SetName implements the TableDef interface.
@@ -819,6 +827,9 @@ func (node *UniqueConstraintTableDef) Format(ctx *FmtCtx) {
 	} else {
 		ctx.WriteString("UNIQUE ")
 	}
+	if node.NoIndex {
+		ctx.WriteString("WITHOUT INDEX ")
+	}
 	ctx.WriteByte('(')
 	ctx.FormatNode(&node.Columns)
 	ctx.WriteByte(')')
diff --git a/pkg/sql/sem/tree/pretty.go b/pkg/sql/sem/tree/pretty.go
index 48faa53f4e6a..191dbd03545b 100644
--- a/pkg/sql/sem/tree/pretty.go
+++ b/pkg/sql/sem/tree/pretty.go
@@ -1652,7 +1652,7 @@ func (node *IndexTableDef) doc(p *PrettyCfg) pretty.Doc {
 func (node *UniqueConstraintTableDef) doc(p *PrettyCfg) pretty.Doc {
 	// Final layout:
 	// [CONSTRAINT name]
-	//    [PRIMARY KEY|UNIQUE] ( ... )
+	//    [PRIMARY KEY|UNIQUE [WITHOUT INDEX]] ( ... )
 	//    [STORING ( ... )]
 	//    [INTERLEAVE ...]
 	//    [PARTITION BY ...]
@@ -1660,7 +1660,7 @@ func (node *UniqueConstraintTableDef) doc(p *PrettyCfg) pretty.Doc {
 	//
 	// or (no constraint name):
 	//
-	// [PRIMARY KEY|UNIQUE] ( ... )
+	// [PRIMARY KEY|UNIQUE [WITHOUT INDEX]] ( ... )
 	//    [STORING ( ... )]
 	//    [INTERLEAVE ...]
 	//    [PARTITION BY ...]
@@ -1672,6 +1672,9 @@ func (node *UniqueConstraintTableDef) doc(p *PrettyCfg) pretty.Doc {
 		title = pretty.Keyword("PRIMARY KEY")
 	} else {
 		title = pretty.Keyword("UNIQUE")
+		if node.NoIndex {
+			title = pretty.ConcatSpace(title, pretty.Keyword("WITHOUT INDEX"))
+		}
 	}
 	title = pretty.ConcatSpace(title, p.bracket("(", p.Doc(&node.Columns), ")"))
 	if node.Name != "" {
@@ -1768,7 +1771,7 @@ func (node *ColumnTableDef) docRow(p *PrettyCfg) pretty.TableRow {
 	//   [[CREATE [IF NOT EXISTS]] FAMILY [name]]
 	//   [[CONSTRAINT name] DEFAULT expr]
 	//   [[CONSTRAINT name] {NULL|NOT NULL}]
-	//   [[CONSTRAINT name] {PRIMARY KEY|UNIQUE}]
+	//   [[CONSTRAINT name] {PRIMARY KEY|UNIQUE [WITHOUT INDEX]}]
 	//   [[CONSTRAINT name] CHECK ...]
 	//   [[CONSTRAINT name] REFERENCES tbl (...)
 	//         [MATCH ...]
@@ -1831,6 +1834,9 @@ func (node *ColumnTableDef) docRow(p *PrettyCfg) pretty.TableRow {
 		pkConstraint = pretty.Keyword("PRIMARY KEY")
 	} else if node.Unique {
 		pkConstraint = pretty.Keyword("UNIQUE")
+		if node.UniqueNoIndex {
+			pkConstraint = pretty.ConcatSpace(pkConstraint, pretty.Keyword("WITHOUT INDEX"))
+		}
 	}
 	if pkConstraint != pretty.Nil {
 		clauses = append(clauses, p.maybePrependConstraintName(&node.UniqueConstraintName, pkConstraint))