bugfix: non-deterministic vcols in partitioning

mysql-test/suite/vcol/inc/vcol_partition.inc

@@ -126,3 +126,14 @@ select * from t1;
 select partition_name,table_rows,data_length from information_schema.partitions where table_name = 't1';
 
 drop table t1;
+
+#
+# Restrictions when partitioned
+#
+
+--error ER_WRONG_EXPR_IN_PARTITION_FUNC_ERROR
+create table t1 (a int, b datetime as (now())) partition by hash(b+1) partitions 3;
+--error ER_WRONG_EXPR_IN_PARTITION_FUNC_ERROR
+create table t1 (a int, b varchar(100) as (user())) partition by hash(b+1) partitions 3;
+--error ER_WRONG_EXPR_IN_PARTITION_FUNC_ERROR
+create table t1 (a int, b double as (rand())) partition by hash(b+1) partitions 3;

mysql-test/suite/vcol/r/vcol_partition_innodb.result

@@ -81,3 +81,9 @@ p0	1	16384
 p1	1	16384
 p2	0	16384
 drop table t1;
+create table t1 (a int, b datetime as (now())) partition by hash(b+1) partitions 3;
+ERROR HY000: Constant, random or timezone-dependent expressions in (sub)partitioning function are not allowed
+create table t1 (a int, b varchar(100) as (user())) partition by hash(b+1) partitions 3;
+ERROR HY000: Constant, random or timezone-dependent expressions in (sub)partitioning function are not allowed
+create table t1 (a int, b double as (rand())) partition by hash(b+1) partitions 3;
+ERROR HY000: Constant, random or timezone-dependent expressions in (sub)partitioning function are not allowed

mysql-test/suite/vcol/r/vcol_partition_myisam.result

@@ -81,3 +81,9 @@ p0	1	7
 p1	1	7
 p2	0	0
 drop table t1;
+create table t1 (a int, b datetime as (now())) partition by hash(b+1) partitions 3;
+ERROR HY000: Constant, random or timezone-dependent expressions in (sub)partitioning function are not allowed
+create table t1 (a int, b varchar(100) as (user())) partition by hash(b+1) partitions 3;
+ERROR HY000: Constant, random or timezone-dependent expressions in (sub)partitioning function are not allowed
+create table t1 (a int, b double as (rand())) partition by hash(b+1) partitions 3;
+ERROR HY000: Constant, random or timezone-dependent expressions in (sub)partitioning function are not allowed

sql/item.cc

@@ -5576,6 +5576,14 @@ bool Item_field::vcol_in_partition_func_processor(void *int_arg)
   return FALSE;
 }
 
+bool Item_field::check_valid_arguments_processor(void *bool_arg)
+{
+  Virtual_column_info *vcol= field->vcol_info;
+  if (!vcol)
+    return FALSE;
+  return vcol->expr->walk(&Item::check_partition_func_processor, 0, NULL)
+      || vcol->expr->walk(&Item::check_valid_arguments_processor, 0, NULL);
+}
 
 void Item_field::cleanup()
 {

sql/item.h

@@ -2576,6 +2576,7 @@ class Item_field :public Item_ident
   bool register_field_in_bitmap(void *arg);
   bool check_partition_func_processor(void *int_arg) {return FALSE;}
   bool vcol_in_partition_func_processor(void *bool_arg);
+  bool check_valid_arguments_processor(void *bool_arg);
   bool check_field_expression_processor(void *arg);
   bool enumerate_field_refs_processor(void *arg);
   bool update_table_bitmaps_processor(void *arg);

sql/table.cc

@@ -3339,6 +3339,8 @@ enum open_frm_error open_table_from_share(THD *thd, TABLE_SHARE *share,
   outparam->file= 0;				// For easier error checking
   outparam->db_stat=0;
   thd->lex->context_analysis_only= save_context_analysis_only;
+  if (outparam->expr_arena)
+    outparam->expr_arena->free_items();
   free_root(&outparam->mem_root, MYF(0));       // Safe to call on bzero'd root
   outparam->alias.free();
   DBUG_RETURN (error);