fix

Author: James Cor

sql/planbuilder/ddl.go

@@ -254,9 +254,11 @@ func (b *Builder) buildDropTable(inScope *scope, c *ast.DDL) (outScope *scope) {
 		tableScope, ok := b.buildResolvedTableForTablename(inScope, t, nil)
 		if ok {
 			// attempting to drop a non-temporary table with DROP TEMPORARY, results in Unknown table
-			if _, isTmpTbl := tableScope.node.(sql.TemporaryTable); !isTmpTbl && c.Temporary {
-				err := sql.ErrUnknownTable.New(tableName)
-				b.handleErr(err)
+			if tbl, ok := tableScope.node.(sql.Table); ok {
+				if tmpTbl := getTempTable(tbl); tmpTbl != nil && !tmpTbl.IsTemporary() && c.Temporary {
+					err := sql.ErrUnknownTable.New(tableName)
+					b.handleErr(err)
+				}
 			}
 			dropTables = append(dropTables, tableScope.node)
 		} else if !c.IfExists {
@@ -269,6 +271,19 @@ func (b *Builder) buildDropTable(inScope *scope, c *ast.DDL) (outScope *scope) {
 	return
 }
 
+func getTempTable(t sql.Table) sql.TemporaryTable {
+	switch t := t.(type) {
+	case sql.TemporaryTable:
+		return t
+	case sql.TableWrapper:
+		return getTempTable(t.Underlying())
+	case *plan.ResolvedTable:
+		return getTempTable(t.Table)
+	default:
+		return nil
+	}
+}
+
 func (b *Builder) buildTruncateTable(inScope *scope, c *ast.DDL) (outScope *scope) {
 	outScope = inScope.push()
 	tableScope, ok := b.buildResolvedTableForTablename(inScope, c.Table, nil)

sql/rowexec/show_iters.go

@@ -499,7 +499,7 @@ func (i *showCreateTablesIter) produceCreateTableStatement(ctx *sql.Context, tab
 	}
 
 	temp := ""
-	if _, ok := table.(sql.TemporaryTable); ok {
+	if tbl := getTempTable(table); tbl != nil && tbl.IsTemporary() {
 		temp = " TEMPORARY"
 	}
 
@@ -544,6 +544,19 @@ func getAutoIncrementTable(t sql.Table) sql.AutoIncrementTable {
 	}
 }
 
+func getTempTable(t sql.Table) sql.TemporaryTable {
+	switch t := t.(type) {
+	case sql.TemporaryTable:
+		return t
+	case sql.TableWrapper:
+		return getTempTable(t.Underlying())
+	case *plan.ResolvedTable:
+		return getTempTable(t.Table)
+	default:
+		return nil
+	}
+}
+
 func formatReplicaStatusTimestamp(t *time.Time) string {
 	if t == nil {
 		return ""