database/mariadb
1
0
Fork 0
mirror of https://github.com/MariaDB/server.git synced 2025-08-08 11:22:35 +03:00
Code Activity

fix JSON_ARRAYAGG not to over-quote json in joins

Browse Source 
This replaces 8711adb786

if a temptable field is created for some json expression (is_json_type()
returns true), make this temptable field a proper json field.

A field is a json field (see Item_field::is_json_type()) if it
has a CHECK constraint of JSON_VALID(field).

Note that it will never be actually checked for temptable fields,
so it won't cause a run-time slowdown.
This commit is contained in:
Sergei Golubchik
2021-06-30 21:28:07 +02:00
parent b62672af72
commit add782a13e
3 changed files with 37 additions and 8 deletions
Download Patch File Download Diff File Expand all files Collapse all files

22
sql/sql_select.cc
View File

@@ -18412,6 +18412,25 @@ Field *Item_func_sp::create_tmp_field_ex(MEM_ROOT *root, TABLE *table,
return result;
}
static bool make_json_valid_expr(TABLE *table, Field *field)
{
THD *thd= table->in_use;
Query_arena backup_arena;
Item *expr, *item_field;
if (!table->expr_arena && table->init_expr_arena(thd->mem_root))
return NULL;
thd->set_n_backup_active_arena(table->expr_arena, &backup_arena);
if ((item_field= new (thd->mem_root) Item_field(thd, field)) &&
(expr= new (thd->mem_root) Item_func_json_valid(thd, item_field)))
field->check_constraint= add_virtual_expression(thd, expr);
thd->restore_active_arena(table->expr_arena, &backup_arena);
return field->check_constraint == NULL;
}
/**
Create field for temporary table.
@@ -18457,6 +18476,9 @@ Field *create_tmp_field(TABLE *table, Item *item,
make_copy_field);
Field *result= item->create_tmp_field_ex(table->in_use->mem_root,
table, &src, &prm);
if (item->is_json_type() && make_json_valid_expr(table, result))
result= NULL;
*from_field= src.field();
*default_field= src.default_field();
if (src.item_result_field())