Add JSON functions introduced by MySQL 5.7

Signed-off-by: Michal Čihař <michal@cihar.com>

Author: nijel

tools/contexts/_functionsMySql50700.txt

@@ -134,6 +134,31 @@ IsClosed (F)
 IsEmpty (F)
 ISNULL (F)
 IsSimple (F)
+JSON_ARRAY (F)
+JSON_ARRAY_APPEND (F)
+JSON_ARRAY_INSERT (F)
+JSON_CONTAINS (F)
+JSON_CONTAINS_PATH (F)
+JSON_DEPTH (F)
+JSON_EXTRACT (F)
+JSON_INSERT (F)
+JSON_KEYS (F)
+JSON_LENGTH (F)
+JSON_MERGE (F)
+JSON_MERGE_PATCH (F)
+JSON_MERGE_PRESERVE (F)
+JSON_OBJECT (F)
+JSON_PRETTY (F)
+JSON_QUOTE (F)
+JSON_REMOVE (F)
+JSON_REPLACE (F)
+JSON_SEARCH (F)
+JSON_SET (F)
+JSON_STORAGE_FREE (F)
+JSON_STORAGE_SIZE (F)
+JSON_TYPE (F)
+JSON_UNQUOTE (F)
+JSON_VALID (F)
 LAST_INSERT_ID (F)
 LCASE (F)
 LEAST (F)

tools/contexts/_functionsMySql80000.txt

@@ -136,6 +136,31 @@ IsClosed (F)
 IsEmpty (F)
 ISNULL (F)
 IsSimple (F)
+JSON_ARRAY (F)
+JSON_ARRAY_APPEND (F)
+JSON_ARRAY_INSERT (F)
+JSON_CONTAINS (F)
+JSON_CONTAINS_PATH (F)
+JSON_DEPTH (F)
+JSON_EXTRACT (F)
+JSON_INSERT (F)
+JSON_KEYS (F)
+JSON_LENGTH (F)
+JSON_MERGE (F)
+JSON_MERGE_PATCH (F)
+JSON_MERGE_PRESERVE (F)
+JSON_OBJECT (F)
+JSON_PRETTY (F)
+JSON_QUOTE (F)
+JSON_REMOVE (F)
+JSON_REPLACE (F)
+JSON_SEARCH (F)
+JSON_SET (F)
+JSON_STORAGE_FREE (F)
+JSON_STORAGE_SIZE (F)
+JSON_TYPE (F)
+JSON_UNQUOTE (F)
+JSON_VALID (F)
 LAST_INSERT_ID (F)
 LCASE (F)
 LEAST (F)