MDEV-28072: JSON_EXTRACT has inconsistent behavior with '0' value in json

path (when range is used)

Analysis: When 0 comes after space, then the json path parser changes the
state to JE_SYN instead of PS_Z (meaning parse zero). Hence the warning.
Fix: Make the state PS_Z instead of JE_SYN.

3 files changed, 855 insertions, 2 deletions

diff --git a/mysql-test/main/func_json.result b/mysql-test/main/func_json.result
index ddbc709e186..027f5f38a3e 100644
--- a/mysql-test/main/func_json.result
+++ b/mysql-test/main/func_json.result
@@ -1751,6 +1751,53 @@ JSON_OVERLAPS('true','tr')
 Warnings:
 Warning	4037	Unexpected end of JSON text in argument 2 to function 'json_overlaps'
 #
+<<<<<<< HEAD
+||||||| parent of 970dba92c3d... MDEV-28072: JSON_EXTRACT has inconsistent behavior with '0' value in json
+<<<<<<< HEAD
+<<<<<<< HEAD
+||||||| constructed merge base
+# End of 10.9 test
+#
+#
+||||||| constructed merge base
+# End of 10.9 test
+#
+#
+=======
+>>>>>>> MDEV-22224: Support JSON Path negative index
+# Beginning of 10.9 Test
+#
+=======
+# Beginning of 10.9 Test
+#
+>>>>>>> MDEV-28071: JSON_EXISTS returns always 1 if it is used range notation for
+=======
+<<<<<<< HEAD
+<<<<<<< HEAD
+<<<<<<< HEAD
+||||||| constructed merge base
+# End of 10.9 test
+#
+#
+||||||| constructed merge base
+# End of 10.9 test
+#
+#
+=======
+>>>>>>> MDEV-22224: Support JSON Path negative index
+||||||| constructed merge base
+=======
+# End of 10.9 test
+#
+#
+>>>>>>> MDEV-28072: JSON_EXTRACT has inconsistent behavior with '0' value in json
+# Beginning of 10.9 Test
+#
+=======
+# Beginning of 10.9 Test
+#
+>>>>>>> MDEV-28071: JSON_EXISTS returns always 1 if it is used range notation for
+>>>>>>> 970dba92c3d... MDEV-28072: JSON_EXTRACT has inconsistent behavior with '0' value in json
 # MDEV-22224: Support JSON Path negative index
 #
 SET @json='{
@@ -2024,6 +2071,7 @@ SELECT JSON_VALUE(@json,'$.x[0]');
 JSON_VALUE(@json,'$.x[0]')
 0
 #
+<<<<<<< HEAD
 # MDEV-27911: Implement range notation for json path
 #
 SET @json= '[
@@ -3014,7 +3062,21 @@ SELECT JSON_VALUE(@json, '$.A[last-1][last-1].key1');
 JSON_VALUE(@json, '$.A[last-1][last-1].key1')
 123
 #
+<<<<<<< HEAD
 # MDEV-28075: JSON_VALUE returns first value from array not from range
+||||||| parent of 970dba92c3d... MDEV-28072: JSON_EXTRACT has inconsistent behavior with '0' value in json
+# MDEV-22224: Support JSON Path negative index
+#
+# MDEV-27911: Implement range notation for json path
+=======
+# MDEV-22224: Support JSON Path negative index
+#
+# Beginning of 10.9 Test
+#
+# MDEV-22224: Support JSON Path negative index
+#
+# MDEV-27911: Implement range notation for json path
+>>>>>>> 970dba92c3d... MDEV-28072: JSON_EXTRACT has inconsistent behavior with '0' value in json
 #
 SET @json1= '[
              [{"key1": "value1"}, {"key2": "value2"}],
@@ -3038,9 +3100,32 @@ SELECT JSON_VALUE(@json, '$[2 to 3][0]');
 JSON_VALUE(@json, '$[2 to 3][0]')
 7
 #
+<<<<<<< HEAD
 # Beginning of 10.9 Test
 #
 # MDEV-22224: Support JSON Path negative index
+||||||| parent of 970dba92c3d... MDEV-28072: JSON_EXTRACT has inconsistent behavior with '0' value in json
+# MDEV-27911: Implement range notation for json path
+=======
+# MDEV-28072: JSON_EXTRACT has inconsistent behavior with '0' value in
+# json path (when range is used)
+#
+SET @json= '[ 11, 22 , 33]';
+SELECT JSON_EXTRACT(@json, '$[0 to 0]');
+JSON_EXTRACT(@json, '$[0 to 0]')
+[11]
+SELECT JSON_EXTRACT(@json, '$[0 to -0]');
+JSON_EXTRACT(@json, '$[0 to -0]')
+[11]
+SELECT JSON_EXTRACT(@json, '$[-0 to 0]');
+JSON_EXTRACT(@json, '$[-0 to 0]')
+[11]
+SELECT JSON_EXTRACT(@json, '$[-0 to -0]');
+JSON_EXTRACT(@json, '$[-0 to -0]')
+[11]
+#
+# MDEV-22224: Support JSON Path negative index
+>>>>>>> 970dba92c3d... MDEV-28072: JSON_EXTRACT has inconsistent behavior with '0' value in json
 #
 SET @json='{
             "A": [0,
@@ -3298,4 +3383,4 @@ JSON_VALUE(@json, '$.A[last-1][last-1].key1')
 123
 #
 # End of 10.9 Test
-#
\ No newline at end of file
+#
diff --git a/mysql-test/main/func_json.test b/mysql-test/main/func_json.test
index 354e6ba7759..5b695618ed2 100644
--- a/mysql-test/main/func_json.test
+++ b/mysql-test/main/func_json.test
@@ -1949,5 +1949,773 @@ SELECT JSON_VALUE(@json, '$[*][0]');
 SELECT JSON_VALUE(@json, '$[2 to 3][0]');
 
 --echo #
+<<<<<<< HEAD
+||||||| parent of 970dba92c3d... MDEV-28072: JSON_EXTRACT has inconsistent behavior with '0' value in json
+--echo # MDEV-27911: Implement range notation for json path
+--echo #
+
+SET @json= '[
+             [1, {"key1": "value1"}, 3],
+             [false, 5, 6],
+             [7, 8, [9, {"key2": 2}, 11]],
+             [15, 1.34, [14], ["string1", [16, {"key1":[1,2,3,[4,5,6]]}, 18]]],
+             [19, 20],
+             21, 22
+            ]';
+SELECT JSON_EXISTS(@json, '$[3][3][-2 to last]');
+
+SET @json= '[
+             [1, {"key1": "value1"}, 3],
+             [false, 5, 6],
+             [7, 8, [9, {"key2": 2}, 11]],
+             [15, 1.34, [14], ["string1", [16, {"key1":[1,2,3,[4,5,6]]}, 18]]],
+             [19, 20],
+             21, 22
+            ]';
+SELECT JSON_SEARCH(@json, 'one', '12', NULL, '$[3][0 to 3]');
+
+SET @json= '[
+             [1, {"key1": "value1"}, 3],
+             [false, 5, 6],
+             [7, 8, [9, {"key2": 2}, 11]],
+             [12, 1.34, [14], ["string1", [16, {"key1":[1,2,3,[4,5,6]]}, 18]]],
+             [19, 20]
+            ]';
+SELECT JSON_VALUE(@json, '$[0][1 to 2].key1');
+
+SET @json='{
+            "A": [0,
+                  [1, 2, 3],
+                  [4, 5, 6],
+                  "seven",
+                   0.8,
+                   true,
+                   false,
+                   "eleven",
+                  [12, [13, 14], {"key1":"value1"},[15]],
+                  true],
+            "B": {"C": 1},
+            "D": 2
+           }';
+SELECT JSON_QUERY(@json, '$.A[-2][-3 to -1]');
+
+SET @json= '[
+             [1, {"key1": "value1"}, 3],
+             [false, 5, 6],
+             [7, 8, [9, {"key2": 2}, 11]],
+             [15, 1.34, [14], ["string1", [16, {"key1":[1,2,3,[4,5,6]]}, 18]]],
+             [19, 20],
+             21, 22
+            ]';
+SELECT JSON_EXTRACT(@json, '$[0 to 3][2]');
+SELECT JSON_EXTRACT(@json, '$[3][3][last-1 to last]');
+SELECT JSON_EXTRACT(@json, '$[3][3][-2 to -1]');
+
+--echo # Checking errors
+
+SET @json= '[
+             [1, {"key1": "value1"}, 3],
+             [false, 5, 6],
+             [7, 8, [9, {"key2": 2}, 11]],
+             [15, 1.34, [14], ["string1", [16, {"key1":[1,2,3,[4,5,6]]}, 18]]],
+             [19, 20],
+             21, 22
+            ]';
+SELECT JSON_CONTAINS_PATH(@json,'one', '$[3][0 to 3]');
+
+SET @json= '[
+             [1, {"key1": "value1"}, 3],
+             [false, 5, 6],
+             [7, 8, [9, {"key2": 2}, 11]],
+             [15, 1.34, [14], ["string1", [16, {"key1":[1,2,3,[4,5,6]]}, 18]]],
+             [19, 20],
+             21, 22
+            ]';
+SELECT JSON_CONTAINS(@json, '$[3][0 to 3]');
+
+SET @json='{
+            "A": [0,
+                  [1, 2, 3],
+                  [4, 5, 6],
+                  "seven",
+                   0.8,
+                   true,
+                   false,
+                   "eleven",
+                  [12, 13, {"key1":"value1"},[15]],
+                  true],
+            "B": {"C": 1},
+            "D": 2
+           }';
+SELECT JSON_ARRAY_INSERT(@json, '$.A[0 to last-1]', 5);
+
+SET @json='{
+            "A": [0,
+                  [1, 2, 3],
+                  [4, 5, 6],
+                  "seven",
+                   0.8,
+                   true,
+                   false,
+                   "eleven",
+                  [12, 13, {"key1":"value1"},[15]],
+                  true],
+            "B": {"C": 1},
+            "D": 2
+           }';
+SELECT JSON_ARRAY_APPEND(@json, '$.A[*]', 7);
+
+SET @json= '[
+             [1, {"key1": "value1"}, 3],
+             [false, 5, 6],
+             [7, 8, [9, {"key2": 2}, 11]],
+             [12, 1.34, [14], ["string1", [16, {"key1":[1,2,3,[4,5,6]]}, 18]]],
+             [19, 20]
+            ]';
+SELECT JSON_SET(@json, '$[0][1 to 2].key1', 1);
+
+SET @json= '[
+             [1, {"key1": "value1"}, 3],
+             [false, 5, 6],
+             [7, 8, [9, {"key2": 2}, 11]],
+             [15, 1.34, [14], ["string1", [16, {"key1":[1,2,3,[4,5,6]]}, 18]]],
+             [19, 20],
+             21, 22
+            ]';
+SELECT JSON_REPLACE(@json, '$[1][last-2 to last]', 4);
+
+SET @json= '[
+             [1, {"key1": "value1"}, 3],
+             [false, 5, 6],
+             [7, 8, [9, {"key2": 2}, 11]],
+             [15, 1.34, [14], ["string1", [16, {"key1":[1,2,3,[4,5,6]]}, 18]]],
+             [19, 20],
+             21, 22
+            ]';
+SELECT JSON_REMOVE(@json, '$[1][-6 to last-2]');
+
+SET @json='{
+            "A": [0,
+                  [1, 2, 3],
+                  [4, 5, 6],
+                  "seven",
+                   0.8,
+                   true,
+                   false,
+                   "eleven",
+                  [12, [13, 14], {"key1":"value1"},[15]],
+                  true],
+            "B": {"C": 1},
+            "D": 2
+           }';
+SELECT JSON_KEYS(@json, '$.A[8][1 to 3]');
+
+--echo #
+--echo # MDEV-22224: Support JSON Path negative index
+--echo #
+
+SET @json='{
+            "A": [0,
+                  [1, 2, 3],
+                  [4, 5, 6],
+                  "seven",
+                   0.8,
+                   true,
+                   false,
+                   "eleven",
+                  [12, 13, {"key1":"value1"},[15]],
+                  true],
+            "B": {"C": 1},
+            "D": 2
+           }';
+SELECT JSON_ARRAY_APPEND(@json, '$.A[-2][-1]', 5);
+SELECT JSON_ARRAY_APPEND(@json, '$.A[last-1][last]', 5);
+
+SET @json='{
+            "A": [0,
+                  [1, 2, 3],
+                  [4, 5, 6],
+                  "seven",
+                   0.8,
+                   true,
+                   false,
+                   "eleven",
+                  [12, 13, {"key1":"value1"},[15]],
+                  true],
+            "B": {"C": 1},
+            "D": 2
+           }';
+SELECT JSON_ARRAY_INSERT(@json, '$.A[-2][-2]', 5);
+SELECT JSON_ARRAY_INSERT(@json, '$.A[last-1][last-1]', 5);
+
+SET @json='{
+            "A": [0,
+                  [1, 2, 3],
+                  [4, 5, 6],
+                  "seven",
+                   0.8,
+                   true,
+                   false,
+                   "eleven",
+                  [12, 13, {"key1":"value1"},[15]],
+                  true],
+            "B": {"C": 1},
+            "D": 2
+           }';
+SELECT JSON_CONTAINS(@json, '15', '$.A[-2][-1]');
+SELECT JSON_CONTAINS(@json, '15', '$.A[last-1][last]');
+
+SET @json='{
+            "A": [0,
+                  [1, 2, 3],
+                  [4, 5, 6],
+                  "seven",
+                   0.8,
+                   true,
+                   false,
+                   "eleven",
+                  [12, 13, {"key1":"value1"},[15]],
+                  true],
+            "B": {"C": 1},
+            "D": 2
+           }';
+SELECT JSON_CONTAINS_PATH(@json, 'one', '$.A[-2]');
+SELECT JSON_CONTAINS_PATH(@json, 'one', '$.A[last-1]');
+
+SET @json='{
+            "A": [0,
+                  [1, 2, 3],
+                  [4, 5, 6],
+                  "seven",
+                   0.8,
+                   true,
+                   false,
+                   "eleven",
+                  [12, 13, {"key1":"value1"},[15]],
+                  true],
+            "B": {"C": 1},
+            "D": 2
+           }';
+SELECT JSON_EXISTS(@json, '$.A[-2][-1]');
+SELECT JSON_EXISTS(@json, '$.A[last-1][last]');
+
+SET @json='{
+            "A": [0,
+                  [1, 2, 3],
+                  [4, 5, 6],
+                  "seven",
+                   0.8,
+                   true,
+                   false,
+                   "eleven",
+                  [12, [13, 14], {"key1":"value1"},[15]],
+                  true],
+            "B": {"C": 1},
+            "D": 2
+           }';
+SELECT JSON_EXTRACT(@json, '$.A[-8][1]');
+SELECT JSON_EXTRACT(@json, '$.A[last-7][1]');
+
+SET @json= '[{"A": 1, "B": 2, "C": {"D": 3}},{"A": 1, "B": 2, "C": {"D": 3}}]';
+SELECT JSON_KEYS(@json, '$[-1].C');
+SELECT JSON_KEYS(@json, '$[last].C');
+
+SET @json='{
+            "A": [0,
+                  [1, 2, 3],
+                  [4, 5, 6],
+                  "seven",
+                   0.8,
+                   true,
+                   false,
+                   "eleven",
+                  [12, [13, 14], {"key1":"value1"},[15]],
+                  true],
+            "B": {"C": 1},
+            "D": 2
+           }';
+SELECT JSON_LENGTH(@json, '$.A[-2][-3]');
+SELECT JSON_LENGTH(@json, '$.A[last-1][last-2]');
+
+SET @json='{
+            "A": [0,
+                  [1, 2, 3],
+                  [4, 5, 6],
+                  "seven",
+                   0.8,
+                   true,
+                   false,
+                   "eleven",
+                  [12, [13, 14], {"key1":"value1"},[15]],
+                  true],
+            "B": {"C": 1},
+            "D": 2
+           }';
+SELECT JSON_QUERY(@json, '$.A[-8]');
+SELECT JSON_QUERY(@json, '$.A[last-7]');
+
+SET @json='{
+            "A": [0,
+                  [1, 2, 3],
+                  [4, 5, 6],
+                  "seven",
+                   0.8,
+                   true,
+                   false,
+                   "eleven",
+                  [12, [13, 14], {"key1":"value1"},[15]],
+                  true],
+            "B": {"C": 1},
+            "D": 2
+           }';
+SELECT JSON_REMOVE(@json, '$.A[-10]');
+SELECT JSON_REMOVE(@json, '$.A[last-9]');
+
+SET @json='{
+            "A": [0,
+                  [1, 2, 3],
+                  [4, 5, 6],
+                  "seven",
+                   0.8,
+                   true,
+                   false,
+                   "eleven",
+                  [12, [13, 14], {"key1":"value1"},[15]],
+                  true],
+            "B": {"C": 1},
+            "D": 2
+           }';
+SELECT JSON_REPLACE(@json, '$.A[-1]', 4);
+SELECT JSON_REPLACE(@json, '$.A[last]', 4);
+
+SET @json = '["abc", [{"k": "10"}, "def"], {"x":"abc"}, {"y":"bcd"}]';
+SELECT JSON_SEARCH(@json, 'all', 'abc', NULL, '$[-2]');
+SELECT JSON_SEARCH(@json, 'all', 'abc', NULL, '$[last-1]');
+
+SET @json='{
+            "A": [0,
+                  [1, 2, 3],
+                  [4, 5, 6],
+                  "seven",
+                   0.8,
+                   true,
+                   false,
+                   "eleven",
+                  [12, [13, 14], {"key1":"value1"},[15]],
+                  true],
+            "B": {"C": 1},
+            "D": 2
+           }';
+SELECT JSON_SET(@json, '$.A[-4]', 100);
+SELECT JSON_SET(@json, '$.A[last-3]', 100);
+
+SET @json='{
+            "A": [0,
+                  [1, 2, 3],
+                  [4, 5, 6],
+                  "seven",
+                   0.8,
+                   true,
+                   false,
+                   "eleven",
+                  [12, [13, 14], {"key1":123},[15]],
+                  true],
+            "B": {"C": 1},
+            "D": 2
+           }';
+SELECT JSON_VALUE(@json, '$.A[-2][-2].key1');
+SELECT JSON_VALUE(@json, '$.A[last-1][last-1].key1');
+
+--echo #
+=======
+--echo # MDEV-27911: Implement range notation for json path
+--echo #
+
+SET @json= '[
+             [1, {"key1": "value1"}, 3],
+             [false, 5, 6],
+             [7, 8, [9, {"key2": 2}, 11]],
+             [15, 1.34, [14], ["string1", [16, {"key1":[1,2,3,[4,5,6]]}, 18]]],
+             [19, 20],
+             21, 22
+            ]';
+SELECT JSON_EXISTS(@json, '$[3][3][-2 to last]');
+
+SET @json= '[
+             [1, {"key1": "value1"}, 3],
+             [false, 5, 6],
+             [7, 8, [9, {"key2": 2}, 11]],
+             [15, 1.34, [14], ["string1", [16, {"key1":[1,2,3,[4,5,6]]}, 18]]],
+             [19, 20],
+             21, 22
+            ]';
+SELECT JSON_SEARCH(@json, 'one', '12', NULL, '$[3][0 to 3]');
+
+SET @json= '[
+             [1, {"key1": "value1"}, 3],
+             [false, 5, 6],
+             [7, 8, [9, {"key2": 2}, 11]],
+             [12, 1.34, [14], ["string1", [16, {"key1":[1,2,3,[4,5,6]]}, 18]]],
+             [19, 20]
+            ]';
+SELECT JSON_VALUE(@json, '$[0][1 to 2].key1');
+
+SET @json='{
+            "A": [0,
+                  [1, 2, 3],
+                  [4, 5, 6],
+                  "seven",
+                   0.8,
+                   true,
+                   false,
+                   "eleven",
+                  [12, [13, 14], {"key1":"value1"},[15]],
+                  true],
+            "B": {"C": 1},
+            "D": 2
+           }';
+SELECT JSON_QUERY(@json, '$.A[-2][-3 to -1]');
+
+SET @json= '[
+             [1, {"key1": "value1"}, 3],
+             [false, 5, 6],
+             [7, 8, [9, {"key2": 2}, 11]],
+             [15, 1.34, [14], ["string1", [16, {"key1":[1,2,3,[4,5,6]]}, 18]]],
+             [19, 20],
+             21, 22
+            ]';
+SELECT JSON_EXTRACT(@json, '$[0 to 3][2]');
+SELECT JSON_EXTRACT(@json, '$[3][3][last-1 to last]');
+SELECT JSON_EXTRACT(@json, '$[3][3][-2 to -1]');
+
+--echo # Checking errors
+
+SET @json= '[
+             [1, {"key1": "value1"}, 3],
+             [false, 5, 6],
+             [7, 8, [9, {"key2": 2}, 11]],
+             [15, 1.34, [14], ["string1", [16, {"key1":[1,2,3,[4,5,6]]}, 18]]],
+             [19, 20],
+             21, 22
+            ]';
+SELECT JSON_CONTAINS_PATH(@json,'one', '$[3][0 to 3]');
+
+SET @json= '[
+             [1, {"key1": "value1"}, 3],
+             [false, 5, 6],
+             [7, 8, [9, {"key2": 2}, 11]],
+             [15, 1.34, [14], ["string1", [16, {"key1":[1,2,3,[4,5,6]]}, 18]]],
+             [19, 20],
+             21, 22
+            ]';
+SELECT JSON_CONTAINS(@json, '$[3][0 to 3]');
+
+SET @json='{
+            "A": [0,
+                  [1, 2, 3],
+                  [4, 5, 6],
+                  "seven",
+                   0.8,
+                   true,
+                   false,
+                   "eleven",
+                  [12, 13, {"key1":"value1"},[15]],
+                  true],
+            "B": {"C": 1},
+            "D": 2
+           }';
+SELECT JSON_ARRAY_INSERT(@json, '$.A[0 to last-1]', 5);
+
+SET @json='{
+            "A": [0,
+                  [1, 2, 3],
+                  [4, 5, 6],
+                  "seven",
+                   0.8,
+                   true,
+                   false,
+                   "eleven",
+                  [12, 13, {"key1":"value1"},[15]],
+                  true],
+            "B": {"C": 1},
+            "D": 2
+           }';
+SELECT JSON_ARRAY_APPEND(@json, '$.A[*]', 7);
+
+SET @json= '[
+             [1, {"key1": "value1"}, 3],
+             [false, 5, 6],
+             [7, 8, [9, {"key2": 2}, 11]],
+             [12, 1.34, [14], ["string1", [16, {"key1":[1,2,3,[4,5,6]]}, 18]]],
+             [19, 20]
+            ]';
+SELECT JSON_SET(@json, '$[0][1 to 2].key1', 1);
+
+SET @json= '[
+             [1, {"key1": "value1"}, 3],
+             [false, 5, 6],
+             [7, 8, [9, {"key2": 2}, 11]],
+             [15, 1.34, [14], ["string1", [16, {"key1":[1,2,3,[4,5,6]]}, 18]]],
+             [19, 20],
+             21, 22
+            ]';
+SELECT JSON_REPLACE(@json, '$[1][last-2 to last]', 4);
+
+SET @json= '[
+             [1, {"key1": "value1"}, 3],
+             [false, 5, 6],
+             [7, 8, [9, {"key2": 2}, 11]],
+             [15, 1.34, [14], ["string1", [16, {"key1":[1,2,3,[4,5,6]]}, 18]]],
+             [19, 20],
+             21, 22
+            ]';
+SELECT JSON_REMOVE(@json, '$[1][-6 to last-2]');
+
+SET @json='{
+            "A": [0,
+                  [1, 2, 3],
+                  [4, 5, 6],
+                  "seven",
+                   0.8,
+                   true,
+                   false,
+                   "eleven",
+                  [12, [13, 14], {"key1":"value1"},[15]],
+                  true],
+            "B": {"C": 1},
+            "D": 2
+           }';
+SELECT JSON_KEYS(@json, '$.A[8][1 to 3]');
+
+
+--echo #
+--echo # MDEV-28072: JSON_EXTRACT has inconsistent behavior with '0' value in
+--echo # json path (when range is used)
+--echo #
+
+SET @json= '[ 11, 22 , 33]';
+SELECT JSON_EXTRACT(@json, '$[0 to 0]');
+SELECT JSON_EXTRACT(@json, '$[0 to -0]');
+SELECT JSON_EXTRACT(@json, '$[-0 to 0]');
+SELECT JSON_EXTRACT(@json, '$[-0 to -0]');
+
+--echo #
+--echo # MDEV-22224: Support JSON Path negative index
+--echo #
+
+SET @json='{
+            "A": [0,
+                  [1, 2, 3],
+                  [4, 5, 6],
+                  "seven",
+                   0.8,
+                   true,
+                   false,
+                   "eleven",
+                  [12, 13, {"key1":"value1"},[15]],
+                  true],
+            "B": {"C": 1},
+            "D": 2
+           }';
+SELECT JSON_ARRAY_APPEND(@json, '$.A[-2][-1]', 5);
+SELECT JSON_ARRAY_APPEND(@json, '$.A[last-1][last]', 5);
+
+SET @json='{
+            "A": [0,
+                  [1, 2, 3],
+                  [4, 5, 6],
+                  "seven",
+                   0.8,
+                   true,
+                   false,
+                   "eleven",
+                  [12, 13, {"key1":"value1"},[15]],
+                  true],
+            "B": {"C": 1},
+            "D": 2
+           }';
+SELECT JSON_ARRAY_INSERT(@json, '$.A[-2][-2]', 5);
+SELECT JSON_ARRAY_INSERT(@json, '$.A[last-1][last-1]', 5);
+
+SET @json='{
+            "A": [0,
+                  [1, 2, 3],
+                  [4, 5, 6],
+                  "seven",
+                   0.8,
+                   true,
+                   false,
+                   "eleven",
+                  [12, 13, {"key1":"value1"},[15]],
+                  true],
+            "B": {"C": 1},
+            "D": 2
+           }';
+SELECT JSON_CONTAINS(@json, '15', '$.A[-2][-1]');
+SELECT JSON_CONTAINS(@json, '15', '$.A[last-1][last]');
+
+SET @json='{
+            "A": [0,
+                  [1, 2, 3],
+                  [4, 5, 6],
+                  "seven",
+                   0.8,
+                   true,
+                   false,
+                   "eleven",
+                  [12, 13, {"key1":"value1"},[15]],
+                  true],
+            "B": {"C": 1},
+            "D": 2
+           }';
+SELECT JSON_CONTAINS_PATH(@json, 'one', '$.A[-2]');
+SELECT JSON_CONTAINS_PATH(@json, 'one', '$.A[last-1]');
+
+SET @json='{
+            "A": [0,
+                  [1, 2, 3],
+                  [4, 5, 6],
+                  "seven",
+                   0.8,
+                   true,
+                   false,
+                   "eleven",
+                  [12, 13, {"key1":"value1"},[15]],
+                  true],
+            "B": {"C": 1},
+            "D": 2
+           }';
+SELECT JSON_EXISTS(@json, '$.A[-2][-1]');
+SELECT JSON_EXISTS(@json, '$.A[last-1][last]');
+
+SET @json='{
+            "A": [0,
+                  [1, 2, 3],
+                  [4, 5, 6],
+                  "seven",
+                   0.8,
+                   true,
+                   false,
+                   "eleven",
+                  [12, [13, 14], {"key1":"value1"},[15]],
+                  true],
+            "B": {"C": 1},
+            "D": 2
+           }';
+SELECT JSON_EXTRACT(@json, '$.A[-8][1]');
+SELECT JSON_EXTRACT(@json, '$.A[last-7][1]');
+
+SET @json= '[{"A": 1, "B": 2, "C": {"D": 3}},{"A": 1, "B": 2, "C": {"D": 3}}]';
+SELECT JSON_KEYS(@json, '$[-1].C');
+SELECT JSON_KEYS(@json, '$[last].C');
+
+SET @json='{
+            "A": [0,
+                  [1, 2, 3],
+                  [4, 5, 6],
+                  "seven",
+                   0.8,
+                   true,
+                   false,
+                   "eleven",
+                  [12, [13, 14], {"key1":"value1"},[15]],
+                  true],
+            "B": {"C": 1},
+            "D": 2
+           }';
+SELECT JSON_LENGTH(@json, '$.A[-2][-3]');
+SELECT JSON_LENGTH(@json, '$.A[last-1][last-2]');
+
+SET @json='{
+            "A": [0,
+                  [1, 2, 3],
+                  [4, 5, 6],
+                  "seven",
+                   0.8,
+                   true,
+                   false,
+                   "eleven",
+                  [12, [13, 14], {"key1":"value1"},[15]],
+                  true],
+            "B": {"C": 1},
+            "D": 2
+           }';
+SELECT JSON_QUERY(@json, '$.A[-8]');
+SELECT JSON_QUERY(@json, '$.A[last-7]');
+
+SET @json='{
+            "A": [0,
+                  [1, 2, 3],
+                  [4, 5, 6],
+                  "seven",
+                   0.8,
+                   true,
+                   false,
+                   "eleven",
+                  [12, [13, 14], {"key1":"value1"},[15]],
+                  true],
+            "B": {"C": 1},
+            "D": 2
+           }';
+SELECT JSON_REMOVE(@json, '$.A[-10]');
+SELECT JSON_REMOVE(@json, '$.A[last-9]');
+
+SET @json='{
+            "A": [0,
+                  [1, 2, 3],
+                  [4, 5, 6],
+                  "seven",
+                   0.8,
+                   true,
+                   false,
+                   "eleven",
+                  [12, [13, 14], {"key1":"value1"},[15]],
+                  true],
+            "B": {"C": 1},
+            "D": 2
+           }';
+SELECT JSON_REPLACE(@json, '$.A[-1]', 4);
+SELECT JSON_REPLACE(@json, '$.A[last]', 4);
+
+SET @json = '["abc", [{"k": "10"}, "def"], {"x":"abc"}, {"y":"bcd"}]';
+SELECT JSON_SEARCH(@json, 'all', 'abc', NULL, '$[-2]');
+SELECT JSON_SEARCH(@json, 'all', 'abc', NULL, '$[last-1]');
+
+SET @json='{
+            "A": [0,
+                  [1, 2, 3],
+                  [4, 5, 6],
+                  "seven",
+                   0.8,
+                   true,
+                   false,
+                   "eleven",
+                  [12, [13, 14], {"key1":"value1"},[15]],
+                  true],
+            "B": {"C": 1},
+            "D": 2
+           }';
+SELECT JSON_SET(@json, '$.A[-4]', 100);
+SELECT JSON_SET(@json, '$.A[last-3]', 100);
+
+SET @json='{
+            "A": [0,
+                  [1, 2, 3],
+                  [4, 5, 6],
+                  "seven",
+                   0.8,
+                   true,
+                   false,
+                   "eleven",
+                  [12, [13, 14], {"key1":123},[15]],
+                  true],
+            "B": {"C": 1},
+            "D": 2
+           }';
+SELECT JSON_VALUE(@json, '$.A[-2][-2].key1');
+SELECT JSON_VALUE(@json, '$.A[last-1][last-1].key1');
+
+--echo #
+>>>>>>> 970dba92c3d... MDEV-28072: JSON_EXTRACT has inconsistent behavior with '0' value in json
 --echo # End of 10.9 Test
 --echo #
diff --git a/strings/json_lib.c b/strings/json_lib.c
index ff2421e0eac..0574c80e84e 100644
--- a/strings/json_lib.c
+++ b/strings/json_lib.c
@@ -1091,7 +1091,7 @@ static int json_path_transitions[N_PATH_STATES][N_PATH_CLASSES]=
             PS_INT, PS_INT, JE_SYN, JE_SYN, PS_AS, JE_SYN, JE_SYN, JE_SYN,
             JE_NOT_JSON_CHR, JE_BAD_CHR},
 /* AS */  { JE_EOS, JE_SYN, JE_SYN, JE_SYN, PS_T, PS_PT, JE_SYN, PS_NEG,
-            JE_SYN, PS_INT, PS_LAST, PS_AS, JE_SYN, JE_SYN, JE_SYN,
+            PS_Z, PS_INT, PS_LAST, PS_AS, JE_SYN, JE_SYN, JE_SYN,
             JE_NOT_JSON_CHR, JE_BAD_CHR},
 /* KEY */ { JE_EOS, PS_KNM, PS_KWD, JE_SYN, PS_KNM, PS_KNM, JE_SYN, JE_SYN,
             PS_KNM, PS_KNM, PS_KNM, PS_KNM, PS_KNM, JE_SYN, PS_KEYX, PS_KNM,