MDEV-15561 json_extract returns NULL with numbers in scientific notation.

Scientific notation handling fixed.

Conflicts:
	mysql-test/r/func_json.result
	mysql-test/t/func_json.test

Author: Alexey Botchkov

mysql-test/r/func_json.result

@@ -736,6 +736,9 @@ insert into t1 values (2),(1);
 select 1 from t1 where json_extract(a,'$','$[81]');
 1
 drop table t1;
+select json_extract('{"test":8.437e-5}','$.test');
+json_extract('{"test":8.437e-5}','$.test')
+8.437e-5
 #
 # Start of 10.3 tests
 #

mysql-test/suite/json/r/json_no_table.result

@@ -1061,9 +1061,7 @@ json_type(json_compact(3.14))
 DOUBLE
 select json_type(json_compact(3.14E30));
 json_type(json_compact(3.14E30))
-NULL
-Warnings:
-Warning	4038	Syntax error in JSON text in argument 1 to function 'json_type' at position 7
+DOUBLE
 select json_type(json_compact(cast('10101abcde' as binary)));
 json_type(json_compact(cast('10101abcde' as binary)))
 INTEGER
@@ -3445,52 +3443,34 @@ JSON_ARRAY(CASE WHEN 1 THEN NULL ELSE NULL END)
 #
 SELECT JSON_EXTRACT('-1E-36181012216111515851075235238', '$');
 JSON_EXTRACT('-1E-36181012216111515851075235238', '$')
-NULL
-Warnings:
-Warning	4038	Syntax error in JSON text in argument 1 to function 'json_extract' at position 33
+-1E-36181012216111515851075235238
 SELECT JSON_EXTRACT('1E-36181012216111515851075235238', '$');
 JSON_EXTRACT('1E-36181012216111515851075235238', '$')
-NULL
-Warnings:
-Warning	4038	Syntax error in JSON text in argument 1 to function 'json_extract' at position 32
+1E-36181012216111515851075235238
 SELECT JSON_EXTRACT('1E-325', '$');
 JSON_EXTRACT('1E-325', '$')
-NULL
-Warnings:
-Warning	4038	Syntax error in JSON text in argument 1 to function 'json_extract' at position 6
+1E-325
 SELECT JSON_EXTRACT('1E-324', '$');
 JSON_EXTRACT('1E-324', '$')
-NULL
-Warnings:
-Warning	4038	Syntax error in JSON text in argument 1 to function 'json_extract' at position 6
+1E-324
 SELECT JSON_EXTRACT('1E-323', '$');
 JSON_EXTRACT('1E-323', '$')
-NULL
-Warnings:
-Warning	4038	Syntax error in JSON text in argument 1 to function 'json_extract' at position 6
+1E-323
 SELECT JSON_EXTRACT('1E+308', '$');
 JSON_EXTRACT('1E+308', '$')
-NULL
-Warnings:
-Warning	4038	Syntax error in JSON text in argument 1 to function 'json_extract' at position 6
+1E+308
 error ER_INVALID_JSON_TEXT_IN_PARAM
 SELECT JSON_EXTRACT('1E+309', '$');
 JSON_EXTRACT('1E+309', '$')
-NULL
-Warnings:
-Warning	4038	Syntax error in JSON text in argument 1 to function 'json_extract' at position 6
+1E+309
 error ER_INVALID_JSON_TEXT_IN_PARAM
 SELECT JSON_EXTRACT('1E+36181012216111515851075235238', '$');
 JSON_EXTRACT('1E+36181012216111515851075235238', '$')
-NULL
-Warnings:
-Warning	4038	Syntax error in JSON text in argument 1 to function 'json_extract' at position 32
+1E+36181012216111515851075235238
 error ER_INVALID_JSON_TEXT_IN_PARAM
 SELECT JSON_EXTRACT('-1E+36181012216111515851075235238', '$');
 JSON_EXTRACT('-1E+36181012216111515851075235238', '$')
-NULL
-Warnings:
-Warning	4038	Syntax error in JSON text in argument 1 to function 'json_extract' at position 33
+-1E+36181012216111515851075235238
 #
 # Bug#21383284: ASSERTION IN SELECT_LEX::SETUP_CONDS
 #

mysql-test/t/func_json.test

@@ -391,6 +391,12 @@ insert into t1 values (2),(1);
 select 1 from t1 where json_extract(a,'$','$[81]');
 drop table t1;
 
+#
+# MDEV-15561 json_extract returns NULL with numbers in scientific notation.
+#
+
+select json_extract('{"test":8.437e-5}','$.test');
+
 --echo #
 --echo # Start of 10.3 tests
 --echo #

strings/json_lib.c

@@ -473,8 +473,8 @@ static int json_num_states[NS_NUM_STATES][N_NUM_CLASSES]=
 /*ZE1*/  { JE_SYN,  JE_SYN, JE_SYN,   JE_SYN, NS_FRAC, JE_SYN, NS_OK,  JE_BAD_CHR },
 /*INT*/  { JE_SYN,  JE_SYN, NS_INT,   NS_INT, NS_FRAC, NS_EX,  NS_OK,  JE_BAD_CHR },
 /*FRAC*/ { JE_SYN,  JE_SYN, NS_FRAC,  NS_FRAC,JE_SYN,  NS_EX,  NS_OK,  JE_BAD_CHR },
-/*EX*/   { NS_EX1,  NS_EX1, NS_EX1,   NS_EX1, JE_SYN,  JE_SYN, JE_SYN, JE_BAD_CHR }, 
-/*EX1*/  { JE_SYN,  JE_SYN, NS_EX1,   NS_EX1, JE_SYN,  JE_SYN, JE_SYN, JE_BAD_CHR }
+/*EX*/   { NS_EX,   NS_EX,  NS_EX1,   NS_EX1, JE_SYN,  JE_SYN, JE_SYN, JE_BAD_CHR }, 
+/*EX1*/  { JE_SYN,  JE_SYN, NS_EX1,   NS_EX1, JE_SYN,  JE_SYN, NS_OK,  JE_BAD_CHR }
 };