chore: import upstream snapshot with attribution

server/hook/delete_table.go

@@ -0,0 +1,157 @@
+// Copyright 2025 Dolthub, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package hook
+
+import (
+	"github.com/cockroachdb/errors"
+	"github.com/dolthub/dolt/go/libraries/doltcore/doltdb"
+	"github.com/dolthub/dolt/go/libraries/doltcore/sqle"
+	"github.com/dolthub/go-mysql-server/sql"
+	"github.com/dolthub/go-mysql-server/sql/plan"
+
+	"github.com/dolthub/doltgresql/core"
+	"github.com/dolthub/doltgresql/core/functions"
+	"github.com/dolthub/doltgresql/core/id"
+	"github.com/dolthub/doltgresql/core/procedures"
+	pgtypes "github.com/dolthub/doltgresql/server/types"
+)
+
+// BeforeTableDeletion performs all validation necessary to ensure that table deletion does not leave the database in an
+// invalid state.
+func BeforeTableDeletion(ctx *sql.Context, _ sql.StatementRunner, nodeInterface sql.Node) (sql.Node, error) {
+	// TODO: handle casts using a table name
+	n, ok := nodeInterface.(*plan.DropTable)
+	if !ok {
+		return nil, errors.Newf("DROP TABLE pre-hook expected `*plan.DropTable` but received `%T`", nodeInterface)
+	}
+	var resolvedTables []*sqle.DoltTable
+	var allTableNames []doltdb.TableName
+	for _, tbl := range n.Tables {
+		doltTable := core.SQLNodeToDoltTable(tbl)
+		if doltTable == nil {
+			// If this table isn't a Dolt table then we ignore it
+			continue
+		}
+		resolvedTables = append(resolvedTables, doltTable)
+		allTableNames = append(allTableNames, doltTable.TableName())
+	}
+	// TODO: handle DROP TABLE CASCADE
+	for _, doltTable := range resolvedTables {
+		// Check if the table is in a column
+		if err := beforeTableDeletionCheckTableColumns(ctx, doltTable, allTableNames); err != nil {
+			return nil, err
+		}
+		// Check if the table is in a function/procedure parameter
+		if err := beforeTableDeletionCheckFuncsProcs(ctx, doltTable, allTableNames); err != nil {
+			return nil, err
+		}
+	}
+	return n, nil
+}
+
+// beforeTableDeletionCheckTableColumns is called from BeforeTableDeletion and handles checking for columns that use a
+// table's type.
+func beforeTableDeletionCheckTableColumns(ctx *sql.Context, doltTable *sqle.DoltTable, allDeletedTables []doltdb.TableName) error {
+	tableName := doltTable.TableName()
+	_, root, err := core.GetRootFromContext(ctx)
+	if err != nil {
+		return err
+	}
+	tableAsType := id.NewType(tableName.Schema, tableName.Name)
+	allTableNames, err := root.GetAllTableNames(ctx, false)
+	if err != nil {
+		return err
+	}
+OuterLoop:
+	for _, otherTableName := range allTableNames {
+		if doltdb.IsSystemTable(otherTableName) {
+			// System tables don't use any table types
+			continue OuterLoop
+		}
+		for _, deletedTable := range allDeletedTables {
+			if deletedTable.EqualFold(otherTableName) {
+				// If we're also deleting this table, then it doesn't matter what the columns have
+				continue OuterLoop
+			}
+		}
+		otherTable, ok, err := root.GetTable(ctx, otherTableName)
+		if err != nil {
+			return err
+		}
+		if !ok {
+			return errors.Newf("root returned table name `%s` but it could not be found?", otherTableName.String())
+		}
+		otherTableSch, err := otherTable.GetSchema(ctx)
+		if err != nil {
+			return err
+		}
+		for _, col := range otherTableSch.GetAllCols().GetColumns() {
+			colType := col.TypeInfo.ToSqlType()
+			dgtype, ok := colType.(*pgtypes.DoltgresType)
+			if !ok {
+				// If this isn't a Doltgres type, then it can't be a table type so we can ignore it
+				continue
+			}
+			if dgtype.ID == tableAsType {
+				// TODO: portion after newline should be in DETAILS but we don't yet support that in our error messages
+				return errors.Newf("cannot drop table %s because other objects depend on it\ncolumn %s of table %s depends on type %s",
+					tableName.Name, col.Name, otherTableName.Name, tableName.Name)
+			}
+		}
+	}
+	return nil
+}
+
+// beforeTableDeletionCheckFuncsProcs is called from BeforeTableDeletion and handles checking for function and procedure
+// parameters that use a table's type.
+func beforeTableDeletionCheckFuncsProcs(ctx *sql.Context, doltTable *sqle.DoltTable, allDeletedTables []doltdb.TableName) error {
+	tableName := doltTable.TableName()
+	tableAsType := id.NewType(tableName.Schema, tableName.Name)
+	funcsColl, err := core.GetFunctionsCollectionFromContext(ctx, "")
+	if err != nil {
+		return err
+	}
+	err = funcsColl.IterateFunctions(ctx, func(f functions.Function) (stop bool, err error) {
+		for _, paramType := range f.ParameterTypes {
+			if paramType == tableAsType {
+				// TODO: portion after newline should be in DETAILS but we don't yet support that in our error messages
+				return true, errors.Newf("cannot drop table %s because other objects depend on it\nfunction %s depends on type %s",
+					tableName.Name, f.Name().Name, tableName.Name)
+			}
+		}
+		return false, nil
+	})
+	if err != nil {
+		return err
+	}
+	procsColl, err := core.GetProceduresCollectionFromContext(ctx, "")
+	if err != nil {
+		return err
+	}
+	err = procsColl.IterateProcedures(ctx, func(p procedures.Procedure) (stop bool, err error) {
+		for _, paramType := range p.ParameterTypes {
+			if paramType == tableAsType {
+				// TODO: portion after newline should be in DETAILS but we don't yet support that in our error messages
+				return true, errors.Newf("cannot drop table %s because other objects depend on it\nfunction %s depends on type %s",
+					tableName.Name, p.Name().Name, tableName.Name)
+			}
+		}
+		return false, nil
+	})
+	if err != nil {
+		return err
+	}
+	return nil
+}

server/hook/rename_table.go

@@ -0,0 +1,106 @@
+// Copyright 2026 Dolthub, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package hook
+
+import (
+	"fmt"
+
+	"github.com/cockroachdb/errors"
+	"github.com/dolthub/dolt/go/libraries/doltcore/doltdb"
+	"github.com/dolthub/go-mysql-server/sql"
+	"github.com/dolthub/go-mysql-server/sql/plan"
+
+	"github.com/dolthub/doltgresql/core"
+	"github.com/dolthub/doltgresql/core/id"
+	pgtypes "github.com/dolthub/doltgresql/server/types"
+)
+
+// AfterTableRename handles updating various columns using the table type, alongside other validation that's unique
+// to Doltgres.
+func AfterTableRename(ctx *sql.Context, runner sql.StatementRunner, nodeInterface sql.Node) error {
+	// TODO: handle casts using table names
+	n, ok := nodeInterface.(*plan.RenameTable)
+	if !ok {
+		return errors.Errorf("RENAME TABLE post-hook expected `*plan.RenameTable` but received `%T`", nodeInterface)
+	}
+
+	// Grab the table being altered (so we know the schema)
+	sqlTable, ok := n.TableExists(ctx, n.NewNames[0])
+	if !ok {
+		// Views do not manifest as tables, so we'll return here if this isn't a table
+		return nil
+	}
+	doltTable := core.SQLTableToDoltTable(sqlTable)
+	if doltTable == nil {
+		// If this table isn't a Dolt table then we don't have anything to do
+		return nil
+	}
+	_, root, err := core.GetRootFromContext(ctx)
+	if err != nil {
+		return err
+	}
+	tableName := doltTable.TableName()
+	tableName.Name = n.OldNames[0]
+	tableAsType := id.NewType(tableName.Schema, tableName.Name)
+	allTableNames, err := root.GetAllTableNames(ctx, false)
+	if err != nil {
+		return err
+	}
+
+	for _, otherTableName := range allTableNames {
+		if doltdb.IsSystemTable(otherTableName) {
+			// System tables don't use any table types
+			continue
+		}
+		otherTable, ok, err := root.GetTable(ctx, otherTableName)
+		if err != nil {
+			return err
+		}
+		if !ok {
+			return errors.Errorf("root returned table name `%s` but it could not be found?", otherTableName.String())
+		}
+		otherTableSch, err := otherTable.GetSchema(ctx)
+		if err != nil {
+			return err
+		}
+		for _, otherCol := range otherTableSch.GetAllCols().GetColumns() {
+			colType := otherCol.TypeInfo.ToSqlType()
+			dgtype, ok := colType.(*pgtypes.DoltgresType)
+			if !ok {
+				// If this isn't a Doltgres type, then it can't be a table type so we can ignore it
+				continue
+			}
+			if dgtype.ID != tableAsType {
+				// This column isn't our table type, so we can ignore it
+				continue
+			}
+			// The ALTER updates the type on the schema since it still has the old one
+			alterStr := fmt.Sprintf(`ALTER TABLE "%s"."%s" ALTER COLUMN "%s" TYPE "%s"."%s";`,
+				otherTableName.Schema, otherTableName.Name, otherCol.Name, tableName.Schema, n.NewNames[0])
+			// We run the statement as though it's interpreted since we're running new statements inside the original
+			_, err = sql.RunInterpreted(ctx, func(subCtx *sql.Context) ([]sql.Row, error) {
+				_, rowIter, _, err := runner.QueryWithBindings(subCtx, alterStr, nil, nil, nil)
+				if err != nil {
+					return nil, err
+				}
+				return sql.RowIterToRows(subCtx, rowIter)
+			})
+			if err != nil {
+				return err
+			}
+		}
+	}
+	return nil
+}

server/hook/table_add_column.go

@@ -0,0 +1,179 @@
+// Copyright 2026 Dolthub, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package hook
+
+import (
+	"fmt"
+	"strings"
+
+	"github.com/cockroachdb/errors"
+	"github.com/dolthub/dolt/go/libraries/doltcore/doltdb"
+	"github.com/dolthub/go-mysql-server/sql"
+	"github.com/dolthub/go-mysql-server/sql/plan"
+
+	"github.com/dolthub/doltgresql/core"
+	"github.com/dolthub/doltgresql/core/id"
+	pgtypes "github.com/dolthub/doltgresql/server/types"
+)
+
+// BeforeTableAddColumn handles validation that's unique to Doltgres.
+func BeforeTableAddColumn(ctx *sql.Context, runner sql.StatementRunner, nodeInterface sql.Node) (sql.Node, error) {
+	n, ok := nodeInterface.(*plan.AddColumn)
+	if !ok {
+		return nil, errors.Errorf("ADD COLUMN pre-hook expected `*plan.AddColumn` but received `%T`", nodeInterface)
+	}
+	// If the column being added doesn't have a default value, then we don't have anything to check (for now)
+	if n.Column().Default == nil {
+		return n, nil
+	}
+
+	// Grab the table being altered
+	doltTable := core.SQLNodeToDoltTable(n.Table)
+	if doltTable == nil {
+		// If this table isn't a Dolt table then we don't have anything to do
+		return n, nil
+	}
+	_, root, err := core.GetRootFromContext(ctx)
+	if err != nil {
+		return n, nil
+	}
+	tableName := doltTable.TableName()
+	tableAsType := id.NewType(tableName.Schema, tableName.Name)
+	allTableNames, err := root.GetAllTableNames(ctx, false)
+	if err != nil {
+		return nil, err
+	}
+
+	for _, otherTableName := range allTableNames {
+		if doltdb.IsSystemTable(otherTableName) {
+			// System tables don't use any table types
+			continue
+		}
+		otherTable, ok, err := root.GetTable(ctx, otherTableName)
+		if err != nil {
+			return nil, err
+		}
+		if !ok {
+			return nil, errors.Errorf("root returned table name `%s` but it could not be found?", otherTableName.String())
+		}
+		otherTableSch, err := otherTable.GetSchema(ctx)
+		if err != nil {
+			return nil, err
+		}
+		for _, otherCol := range otherTableSch.GetAllCols().GetColumns() {
+			colType := otherCol.TypeInfo.ToSqlType()
+			dgtype, ok := colType.(*pgtypes.DoltgresType)
+			if !ok {
+				// If this isn't a Doltgres type, then it can't be a table type so we can ignore it
+				continue
+			}
+			if dgtype.ID != tableAsType {
+				// This column isn't our table type, so we can ignore it
+				continue
+			}
+			return nil, errors.Errorf(`cannot alter table "%s" because column "%s.%s" uses its row type`,
+				tableName.Name, otherTableName.Name, otherCol.Name)
+		}
+	}
+	return n, nil
+}
+
+// AfterTableAddColumn handles updating various table columns, alongside other validation that's unique to Doltgres.
+func AfterTableAddColumn(ctx *sql.Context, runner sql.StatementRunner, nodeInterface sql.Node) error {
+	n, ok := nodeInterface.(*plan.AddColumn)
+	if !ok {
+		return errors.Errorf("ADD COLUMN post-hook expected `*plan.AddColumn` but received `%T`", nodeInterface)
+	}
+
+	// Grab the table being altered
+	doltTable := core.SQLNodeToDoltTable(n.Table)
+	if doltTable == nil {
+		// If this table isn't a Dolt table then we don't have anything to do
+		return nil
+	}
+	_, root, err := core.GetRootFromContext(ctx)
+	if err != nil {
+		return err
+	}
+	tableName := doltTable.TableName()
+	tableAsType := id.NewType(tableName.Schema, tableName.Name)
+	allTableNames, err := root.GetAllTableNames(ctx, false)
+	if err != nil {
+		return err
+	}
+	sch := doltTable.Schema(ctx)
+
+	for _, otherTableName := range allTableNames {
+		if doltdb.IsSystemTable(otherTableName) {
+			// System tables don't use any table types
+			continue
+		}
+		otherTable, ok, err := root.GetTable(ctx, otherTableName)
+		if err != nil {
+			return err
+		}
+		if !ok {
+			return errors.Errorf("root returned table name `%s` but it could not be found?", otherTableName.String())
+		}
+		otherTableSch, err := otherTable.GetSchema(ctx)
+		if err != nil {
+			return err
+		}
+		for _, otherCol := range otherTableSch.GetAllCols().GetColumns() {
+			colType := otherCol.TypeInfo.ToSqlType()
+			dgtype, ok := colType.(*pgtypes.DoltgresType)
+			if !ok {
+				// If this isn't a Doltgres type, then it can't be a table type so we can ignore it
+				continue
+			}
+			if dgtype.ID != tableAsType {
+				// This column isn't our table type, so we can ignore it
+				continue
+			}
+			// Build the UPDATE statement that we'll run for this table
+			rowValues := make([]string, len(sch)+1)
+			for i, col := range sch {
+				rowValues[i] = fmt.Sprintf(`("%s")."%s"`, otherCol.Name, col.Name)
+			}
+			rowValues[len(rowValues)-1] = "NULL"
+			// The UPDATE changes the values in the table
+			updateStr := fmt.Sprintf(`UPDATE "%s"."%s" SET "%s" = ROW(%s)::"%s"."%s" WHERE length("%s"::text) > 0;`,
+				otherTableName.Schema, otherTableName.Name, otherCol.Name, strings.Join(rowValues, ","), tableName.Schema, tableName.Name, otherCol.Name)
+			// The ALTER updates the type on the schema since it still has the old one
+			alterStr := fmt.Sprintf(`ALTER TABLE "%s"."%s" ALTER COLUMN "%s" TYPE "%s"."%s";`,
+				otherTableName.Schema, otherTableName.Name, otherCol.Name, tableName.Schema, tableName.Name)
+			// We run the statements as though they were interpreted since we're running new statements inside the original
+			_, err = sql.RunInterpreted(ctx, func(subCtx *sql.Context) ([]sql.Row, error) {
+				_, rowIter, _, err := runner.QueryWithBindings(subCtx, updateStr, nil, nil, nil)
+				if err != nil {
+					return nil, err
+				}
+				_, err = sql.RowIterToRows(subCtx, rowIter)
+				if err != nil {
+					return nil, err
+				}
+				_, rowIter, _, err = runner.QueryWithBindings(subCtx, alterStr, nil, nil, nil)
+				if err != nil {
+					return nil, err
+				}
+				return sql.RowIterToRows(subCtx, rowIter)
+			})
+			if err != nil {
+				return err
+			}
+		}
+	}
+	return nil
+}

server/hook/table_drop_column.go

@@ -0,0 +1,121 @@
+// Copyright 2026 Dolthub, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package hook
+
+import (
+	"fmt"
+
+	"github.com/cockroachdb/errors"
+	"github.com/dolthub/dolt/go/libraries/doltcore/doltdb"
+	"github.com/dolthub/go-mysql-server/sql"
+	"github.com/dolthub/go-mysql-server/sql/plan"
+
+	"github.com/dolthub/doltgresql/core"
+	"github.com/dolthub/doltgresql/core/id"
+	pgtypes "github.com/dolthub/doltgresql/server/types"
+)
+
+// AfterTableDropColumn handles updating various table columns, alongside other validation that's unique to Doltgres.
+func AfterTableDropColumn(ctx *sql.Context, runner sql.StatementRunner, nodeInterface sql.Node) error {
+	n, ok := nodeInterface.(*plan.DropColumn)
+	if !ok {
+		return errors.Errorf("DROP COLUMN post-hook expected `*plan.DropColumn` but received `%T`", nodeInterface)
+	}
+
+	// Grab the table being altered
+	doltTable := core.SQLNodeToDoltTable(n.Table)
+	if doltTable == nil {
+		// If this table isn't a Dolt table then we don't have anything to do
+		return nil
+	}
+	_, root, err := core.GetRootFromContext(ctx)
+	if err != nil {
+		return err
+	}
+	tableName := doltTable.TableName()
+	tableAsType := id.NewType(tableName.Schema, tableName.Name)
+	allTableNames, err := root.GetAllTableNames(ctx, false)
+	if err != nil {
+		return err
+	}
+	sch := n.TargetSchema()
+
+	for _, otherTableName := range allTableNames {
+		if doltdb.IsSystemTable(otherTableName) {
+			// System tables don't use any table types
+			continue
+		}
+		otherTable, ok, err := root.GetTable(ctx, otherTableName)
+		if err != nil {
+			return err
+		}
+		if !ok {
+			return errors.Errorf("root returned table name `%s` but it could not be found?", otherTableName.String())
+		}
+		otherTableSch, err := otherTable.GetSchema(ctx)
+		if err != nil {
+			return err
+		}
+		for _, otherCol := range otherTableSch.GetAllCols().GetColumns() {
+			colType := otherCol.TypeInfo.ToSqlType()
+			dgtype, ok := colType.(*pgtypes.DoltgresType)
+			if !ok {
+				// If this isn't a Doltgres type, then it can't be a table type so we can ignore it
+				continue
+			}
+			if dgtype.ID != tableAsType {
+				// This column isn't our table type, so we can ignore it
+				continue
+			}
+			// Build the UPDATE statement that we'll run for this table
+			trimIdx := -1
+			for i, col := range sch {
+				if col.Name == n.Column {
+					trimIdx = i
+					break
+				}
+			}
+			if trimIdx == -1 {
+				return errors.New("DROP COLUMN post-hook could not find the index of the column to remove")
+			}
+			// The UPDATE changes the values in the table
+			updateStr := fmt.Sprintf(`UPDATE "%s"."%s" SET "%s" = dolt_recordtrim("%s", %d)::"%s"."%s";`,
+				otherTableName.Schema, otherTableName.Name, otherCol.Name, otherCol.Name, trimIdx, tableName.Schema, tableName.Name)
+			// The ALTER updates the type on the schema since it still has the old one
+			alterStr := fmt.Sprintf(`ALTER TABLE "%s"."%s" ALTER COLUMN "%s" TYPE "%s"."%s";`,
+				otherTableName.Schema, otherTableName.Name, otherCol.Name, tableName.Schema, tableName.Name)
+			// We run the statements as though they were interpreted since we're running new statements inside the original
+			_, err = sql.RunInterpreted(ctx, func(subCtx *sql.Context) ([]sql.Row, error) {
+				_, rowIter, _, err := runner.QueryWithBindings(subCtx, updateStr, nil, nil, nil)
+				if err != nil {
+					return nil, err
+				}
+				_, err = sql.RowIterToRows(subCtx, rowIter)
+				if err != nil {
+					return nil, err
+				}
+				_, rowIter, _, err = runner.QueryWithBindings(subCtx, alterStr, nil, nil, nil)
+				if err != nil {
+					return nil, err
+				}
+				return sql.RowIterToRows(subCtx, rowIter)
+			})
+			if err != nil {
+				return err
+			}
+		}
+	}
+	return nil
+}

server/hook/table_modify_column.go

@@ -0,0 +1,106 @@
+// Copyright 2026 Dolthub, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package hook
+
+import (
+	"github.com/cockroachdb/errors"
+	"github.com/dolthub/dolt/go/libraries/doltcore/doltdb"
+	"github.com/dolthub/go-mysql-server/sql"
+	"github.com/dolthub/go-mysql-server/sql/plan"
+
+	"github.com/dolthub/doltgresql/core"
+	"github.com/dolthub/doltgresql/core/id"
+	pgtypes "github.com/dolthub/doltgresql/server/types"
+)
+
+// beforeTableModifyColumnChange represents what properties of a column changed when a call is made to BeforeTableModifyColumn.
+type beforeTableModifyColumnChange uint8
+
+const (
+	beforeTableModifyColumnChange_None beforeTableModifyColumnChange = iota
+	beforeTableModifyColumnChange_Type
+)
+
+// BeforeTableModifyColumn handles validation that's unique to Doltgres.
+func BeforeTableModifyColumn(ctx *sql.Context, runner sql.StatementRunner, nodeInterface sql.Node) (sql.Node, error) {
+	n, ok := nodeInterface.(*plan.ModifyColumn)
+	if !ok {
+		return nil, errors.Errorf("MODIFY COLUMN pre-hook expected `*plan.ModifyColumn` but received `%T`", nodeInterface)
+	}
+
+	// Figure out what was changed. We know it's not the name because we have a dedicated *RenameColumn node.
+	changed := beforeTableModifyColumnChange_None
+	newColumn := n.NewColumn()
+	for _, col := range n.TargetSchema() {
+		if col.Name == newColumn.Name {
+			if !col.Type.Equals(newColumn.Type) {
+				changed = beforeTableModifyColumnChange_Type
+			}
+		}
+	}
+	if changed == beforeTableModifyColumnChange_None {
+		return n, nil
+	}
+
+	// Grab the table being altered (so we know the schema)
+	doltTable := core.SQLNodeToDoltTable(n.Table)
+	if doltTable == nil {
+		// If this table isn't a Dolt table then we don't have anything to do
+		return n, nil
+	}
+	_, root, err := core.GetRootFromContext(ctx)
+	if err != nil {
+		return n, nil
+	}
+	tableName := doltTable.TableName()
+	tableAsType := id.NewType(tableName.Schema, tableName.Name)
+	allTableNames, err := root.GetAllTableNames(ctx, false)
+	if err != nil {
+		return nil, err
+	}
+
+	for _, otherTableName := range allTableNames {
+		if doltdb.IsSystemTable(otherTableName) {
+			// System tables don't use any table types
+			continue
+		}
+		otherTable, ok, err := root.GetTable(ctx, otherTableName)
+		if err != nil {
+			return nil, err
+		}
+		if !ok {
+			return nil, errors.Errorf("root returned table name `%s` but it could not be found?", otherTableName.String())
+		}
+		otherTableSch, err := otherTable.GetSchema(ctx)
+		if err != nil {
+			return nil, err
+		}
+		for _, otherCol := range otherTableSch.GetAllCols().GetColumns() {
+			colType := otherCol.TypeInfo.ToSqlType()
+			dgtype, ok := colType.(*pgtypes.DoltgresType)
+			if !ok {
+				// If this isn't a Doltgres type, then it can't be a table type so we can ignore it
+				continue
+			}
+			if dgtype.ID != tableAsType {
+				// This column isn't our table type, so we can ignore it
+				continue
+			}
+			return nil, errors.Errorf(`cannot alter table "%s" because column "%s.%s" uses its row type`,
+				tableName.Name, otherTableName.Name, otherCol.Name)
+		}
+	}
+	return n, nil
+}

server/hook/table_rename_column.go

@@ -0,0 +1,101 @@
+// Copyright 2026 Dolthub, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package hook
+
+import (
+	"fmt"
+
+	"github.com/cockroachdb/errors"
+	"github.com/dolthub/dolt/go/libraries/doltcore/doltdb"
+	"github.com/dolthub/go-mysql-server/sql"
+	"github.com/dolthub/go-mysql-server/sql/plan"
+
+	"github.com/dolthub/doltgresql/core"
+	"github.com/dolthub/doltgresql/core/id"
+	pgtypes "github.com/dolthub/doltgresql/server/types"
+)
+
+// AfterTableRenameColumn handles updating various table columns, alongside other validation that's unique to Doltgres.
+func AfterTableRenameColumn(ctx *sql.Context, runner sql.StatementRunner, nodeInterface sql.Node) error {
+	n, ok := nodeInterface.(*plan.RenameColumn)
+	if !ok {
+		return errors.Errorf("RENAME COLUMN post-hook expected `*plan.RenameColumn` but received `%T`", nodeInterface)
+	}
+	if n.ColumnName == n.NewColumnName {
+		return nil
+	}
+
+	// Grab the table being altered
+	doltTable := core.SQLNodeToDoltTable(n.Table)
+	if doltTable == nil {
+		// If this table isn't a Dolt table then we don't have anything to do
+		return nil
+	}
+	_, root, err := core.GetRootFromContext(ctx)
+	if err != nil {
+		return err
+	}
+	tableName := doltTable.TableName()
+	tableAsType := id.NewType(tableName.Schema, tableName.Name)
+	allTableNames, err := root.GetAllTableNames(ctx, false)
+	if err != nil {
+		return err
+	}
+
+	for _, otherTableName := range allTableNames {
+		if doltdb.IsSystemTable(otherTableName) {
+			// System tables don't use any table types
+			continue
+		}
+		otherTable, ok, err := root.GetTable(ctx, otherTableName)
+		if err != nil {
+			return err
+		}
+		if !ok {
+			return errors.Errorf("root returned table name `%s` but it could not be found?", otherTableName.String())
+		}
+		otherTableSch, err := otherTable.GetSchema(ctx)
+		if err != nil {
+			return err
+		}
+		for _, otherCol := range otherTableSch.GetAllCols().GetColumns() {
+			colType := otherCol.TypeInfo.ToSqlType()
+			dgtype, ok := colType.(*pgtypes.DoltgresType)
+			if !ok {
+				// If this isn't a Doltgres type, then it can't be a table type so we can ignore it
+				continue
+			}
+			if dgtype.ID != tableAsType {
+				// This column isn't our table type, so we can ignore it
+				continue
+			}
+			// The ALTER updates the type on the schema since it still has the old one
+			alterStr := fmt.Sprintf(`ALTER TABLE "%s"."%s" ALTER COLUMN "%s" TYPE "%s"."%s";`,
+				otherTableName.Schema, otherTableName.Name, otherCol.Name, tableName.Schema, tableName.Name)
+			// We run the statement as though it were interpreted since we're running new statements inside the original
+			_, err = sql.RunInterpreted(ctx, func(subCtx *sql.Context) ([]sql.Row, error) {
+				_, rowIter, _, err := runner.QueryWithBindings(subCtx, alterStr, nil, nil, nil)
+				if err != nil {
+					return nil, err
+				}
+				return sql.RowIterToRows(subCtx, rowIter)
+			})
+			if err != nil {
+				return err
+			}
+		}
+	}
+	return nil
+}