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MDEV-27911: Implement range notation for json path

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Range can be thought about in similar manner as wildcard (*) where
more than one elements are processed. To implement range notation, extended
json parser to parse the 'to' keyword and added JSON_PATH_ARRAY_RANGE for
path type. If there is 'to' keyword then use JSON_PATH_ARRAY range for
path type along with existing type.
This new integer to store the end index of range is n_item_end.
When there is 'to' keyword, store the integer in n_item_end else store in
n_item.
This commit is contained in:
Rucha Deodhar
2022-03-05 01:03:49 +05:30
parent abe9712194
commit c781cefd8a
8 changed files with 480 additions and 88 deletions
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3
sql/json_table.cc
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@ -561,7 +561,8 @@ int ha_json_table::fill_column_values(THD *thd, uchar * buf, uchar *pos)
more matches for it in json and report an error if so.
*/
if (jc->m_path.types_used &
(JSON_PATH_WILD | JSON_PATH_DOUBLE_WILD) &&
(JSON_PATH_WILD | JSON_PATH_DOUBLE_WILD |
JSON_PATH_ARRAY_RANGE) &&
(json_scan_next(&je) ||
!json_find_path(&je, &jc->m_path, &cur_step,
array_counters)))