MDEV-11557 port MySQL-5.7 JSON tests to MariaDB.

        json_no_table.test ported.

Author: Alexey Botchkov

include/json_lib.h

@@ -219,7 +219,7 @@ typedef struct st_json_engine_t
                  /* string constants. */
 
   int stack[JSON_DEPTH_LIMIT]; /* Keeps the stack of nested JSON structures. */
-  int *stack_p;                /* The 'stack' pointer. */
+  int stack_p;                 /* The 'stack' pointer. */
 } json_engine_t;
 
 
@@ -308,7 +308,7 @@ typedef const int *json_level_t;
 */
 #define json_get_level(j) (j->stack_p)
 
-int json_skip_to_level(json_engine_t *j, json_level_t level);
+int json_skip_to_level(json_engine_t *j, int level);
 
 /*
   json_skip_level() works as above with just current structre.
@@ -391,6 +391,27 @@ int json_append_ascii(CHARSET_INFO *json_cs,
                       uchar *json, uchar *json_end,
                       const uchar *ascii, const uchar *ascii_end);
 
+
+/*
+  Scan the JSON and return paths met one-by-one.
+     json_get_path_start(&p)
+     while (json_get_path_next(&p))
+     {
+       handle_the_next_path();
+     }
+*/
+
+int json_get_path_start(json_engine_t *je, CHARSET_INFO *i_cs,
+                        const uchar *str, const uchar *end,
+                        json_path_t *p);
+
+
+int json_get_path_next(json_engine_t *je, json_path_t *p);
+
+
+int json_path_compare(const json_path_t *a, const json_path_t *b);
+
+
 #ifdef  __cplusplus
 }
 #endif

mysql-test/mysql-test-run.pl

@@ -182,6 +182,7 @@ END
     innodb_fts-
     innodb_gis-
     innodb_zip-
+    json-
     maria-
     multi_source-
     optimizer_unfixed_bugs-

mysql-test/r/func_json.result

@@ -212,6 +212,12 @@ json_extract('1', '$')
 select json_extract('[10, 20, [30, 40], 1, 10]', '$[1]');
 json_extract('[10, 20, [30, 40], 1, 10]', '$[1]')
 20
+select json_extract('[10, 20, [30, 40], 1, 10]', '$[1]', '$[25]');
+json_extract('[10, 20, [30, 40], 1, 10]', '$[1]', '$[25]')
+[20]
+select json_extract( '[{"a": [3, 4]}, {"b": 2}]', '$[0].a', '$[1].a');
+json_extract( '[{"a": [3, 4]}, {"b": 2}]', '$[0].a', '$[1].a')
+[[3, 4]]
 select json_insert('{"a":1, "b":{"c":1}, "d":[1, 2]}', '$.b.k1', 'word');
 json_insert('{"a":1, "b":{"c":1}, "d":[1, 2]}', '$.b.k1', 'word')
 {"a":1, "b":{"c":1, "k1":"word"}, "d":[1, 2]}