importinto: fix panic when import to a temporary table, disallow impo…

…rt to cached table (#55983)

close #55970

pkg/planner/core/planbuilder.go

@@ -4470,6 +4470,11 @@ func (b *PlanBuilder) buildImportInto(ctx context.Context, ld *ast.ImportIntoStm
 	}
 
 	tnW := b.resolveCtx.GetTableName(ld.Table)
+	if tnW.TableInfo.TempTableType != model.TempTableNone {
+		return nil, errors.Errorf("IMPORT INTO does not support temporary table")
+	} else if tnW.TableInfo.TableCacheStatusType != model.TableCacheStatusDisable {
+		return nil, errors.Errorf("IMPORT INTO does not support cached table")
+	}
 	p := ImportInto{
 		Path:               ld.Path,
 		Format:             ld.Format,

tests/integrationtest/r/executor/import_into.result

@@ -170,3 +170,16 @@ import into t from '';
 Error 8156 (HY000): The value of INFILE must not be empty when LOAD DATA from LOCAL
 import into t from '/a.csv' format 'xx';
 Error 8157 (HY000): The FORMAT 'xx' is not supported
+drop table if exists temp;
+create temporary table temp (id int);
+import into temp from '/file.csv';
+Error 1105 (HY000): IMPORT INTO does not support temporary table
+drop table if exists gtemp;
+create global temporary table gtemp (id int) on commit delete rows;
+import into gtemp from '/file.csv';
+Error 1105 (HY000): IMPORT INTO does not support temporary table
+drop table if exists cachetbl;
+create table cachetbl (id int);
+alter table cachetbl cache;
+import into cachetbl from '/file.csv';
+Error 1105 (HY000): IMPORT INTO does not support cached table

tests/integrationtest/t/executor/import_into.test

@@ -174,3 +174,19 @@ import into t from '';
 -- error 8157
 import into t from '/a.csv' format 'xx';
 
+# import into temporary or cached table is not supported
+drop table if exists temp;
+create temporary table temp (id int);
+-- error 1105
+import into temp from '/file.csv';
+
+drop table if exists gtemp;
+create global temporary table gtemp (id int) on commit delete rows;
+-- error 1105
+import into gtemp from '/file.csv';
+
+drop table if exists cachetbl;
+create table cachetbl (id int);
+alter table cachetbl cache;
+-- error 1105
+import into cachetbl from '/file.csv';