diff options
Diffstat (limited to 'sql/item_sum.cc')
| -rw-r--r-- | sql/item_sum.cc | 14 |
1 files changed, 7 insertions, 7 deletions
diff --git a/sql/item_sum.cc b/sql/item_sum.cc index 5d0578df4ac..7106f72e237 100644 --- a/sql/item_sum.cc +++ b/sql/item_sum.cc @@ -3780,7 +3780,7 @@ int dump_leaf_key(void* key_arg, element_count count __attribute__((unused)), { Item_func_group_concat *item= (Item_func_group_concat *) item_arg; TABLE *table= item->table; - uint max_length= (uint)table->in_use->variables.group_concat_max_len; + uint max_length= table->in_use->variables.group_concat_max_len; String tmp((char *)table->record[1], table->s->reclength, default_charset_info); String tmp2; @@ -4109,7 +4109,7 @@ bool Item_func_group_concat::repack_tree(THD *thd) DBUG_ASSERT(tree->size_of_element == st.tree.size_of_element); st.table= table; st.len= 0; - st.maxlen= (size_t)thd->variables.group_concat_max_len; + st.maxlen= thd->variables.group_concat_max_len; tree_walk(tree, ©_to_tree, &st, left_root_right); if (st.len <= st.maxlen) // Copying aborted. Must be OOM { @@ -4131,7 +4131,7 @@ bool Item_func_group_concat::repack_tree(THD *thd) decreases up to N=10 (that is, factor=1024) and then starts to increase, again, very slowly. */ -#define GCONCAT_REPACK_FACTOR (1 << 10) +#define GCONCAT_REPACK_FACTOR 10 bool Item_func_group_concat::add(bool exclude_nulls) { @@ -4186,7 +4186,7 @@ bool Item_func_group_concat::add(bool exclude_nulls) { THD *thd= table->in_use; table->field[0]->store(row_str_len, FALSE); - if (tree_len > thd->variables.group_concat_max_len * GCONCAT_REPACK_FACTOR + if ((tree_len >> GCONCAT_REPACK_FACTOR) > thd->variables.group_concat_max_len && tree->elements_in_tree > 1) if (repack_tree(thd)) return 1; @@ -4240,9 +4240,9 @@ Item_func_group_concat::fix_fields(THD *thd, Item **ref) result.set_charset(collation.collation); result_field= 0; null_value= 1; - max_length= (uint32)(thd->variables.group_concat_max_len - / collation.collation->mbminlen - * collation.collation->mbmaxlen); + max_length= (uint32)MY_MIN(thd->variables.group_concat_max_len + / collation.collation->mbminlen + * collation.collation->mbmaxlen, UINT_MAX32); uint32 offset; if (separator->needs_conversion(separator->length(), separator->charset(), |