Smaller fixes for LibreOffice integration:

  - added type MYSQL_TYPE_JSON (=245)
  - include error numbers (ma_errmsg.h) via mysql.h
  - convert MYSQL_TYPE_JSON to string (prepared statements)
  - added error message number 2034 (invalid buffer)

Author: 9EOR9

include/ma_errmsg.h

@@ -67,6 +67,7 @@ extern const char *mariadb_client_errors[];	/* Error messages */
 #define CR_NO_PREPARE_STMT      2030
 #define CR_PARAMS_NOT_BOUND     2031
 #define CR_INVALID_PARAMETER_NO  2034
+#define CR_INVALID_BUFFER_USE    2035
 #define CR_UNSUPPORTED_PARAM_TYPE 2036
 
 #define CR_SHARED_MEMORY_CONNECTION 2037

include/mariadb_com.h

@@ -326,6 +326,7 @@ enum enum_field_types { MYSQL_TYPE_DECIMAL, MYSQL_TYPE_TINY,
                         MYSQL_TYPE_DATETIME2,
                         MYSQL_TYPE_TIME2,
                         /* --------------------------------------------- */
+                        MYSQL_TYPE_JSON=245,
                         MYSQL_TYPE_NEWDECIMAL=246,
                         MYSQL_TYPE_ENUM=247,
                         MYSQL_TYPE_SET=248,

include/mysql.h

@@ -60,6 +60,7 @@ typedef int my_socket;
 #include "mariadb_version.h"
 #include "ma_list.h"
 #include "mariadb_ctype.h"
+#include "ma_errmsg.h"
 
 #ifndef ST_MA_USED_MEM_DEFINED
 #define ST_MA_USED_MEM_DEFINED

libmariadb/ma_errmsg.c

@@ -112,10 +112,10 @@ const char *client_errors[]=
 /* 2029 */  "",
 /* 2030 */  "Statement is not prepared",
 /* 2031 */  "No data supplied for parameters in prepared statement",
-/* 2032 */  "",
+/* 2032 */  "Data truncated",
 /* 2033 */  "",
-/* 2034 */  "",
-/* 2035 */  "",
+/* 2034 */  "Invalid parameter number",
+/* 2035 */  "Invalid buffer type: %d (paraneter: %d)",
 /* 2036 */  "Buffer type is not supported",
 /* 2037 */  "Shared memory: %-.64s",
 /* 2038 */  "Shared memory connection failed during %s. (%lu)",

libmariadb/ma_stmt_codec.c

@@ -939,7 +939,8 @@ void ps_fetch_bin(MYSQL_BIND *r_param,
         memcpy(r_param->buffer, current_pos, MIN(copylen, r_param->buffer_length));
     }
     if (copylen < r_param->buffer_length &&
-        r_param->buffer_type == MYSQL_TYPE_STRING)
+        (r_param->buffer_type == MYSQL_TYPE_STRING ||
+         r_param->buffer_type == MYSQL_TYPE_JSON))
       ((char *)r_param->buffer)[copylen]= 0;
     *r_param->error= copylen > r_param->buffer_length;
     (*row)+= field_length;
@@ -1041,6 +1042,10 @@ void mysql_init_ps_subsystem(void)
   mysql_ps_fetch_functions[MYSQL_TYPE_STRING].pack_len    = MYSQL_PS_SKIP_RESULT_STR;
   mysql_ps_fetch_functions[MYSQL_TYPE_STRING].max_len  = -1;
 
+  mysql_ps_fetch_functions[MYSQL_TYPE_JSON].func      = ps_fetch_string;
+  mysql_ps_fetch_functions[MYSQL_TYPE_JSON].pack_len    = MYSQL_PS_SKIP_RESULT_STR;
+  mysql_ps_fetch_functions[MYSQL_TYPE_JSON].max_len  = -1;
+
   mysql_ps_fetch_functions[MYSQL_TYPE_DECIMAL].func    = ps_fetch_string;
   mysql_ps_fetch_functions[MYSQL_TYPE_DECIMAL].pack_len  = MYSQL_PS_SKIP_RESULT_STR;
   mysql_ps_fetch_functions[MYSQL_TYPE_DECIMAL].max_len  = -1;

libmariadb/mariadb_stmt.c

@@ -118,6 +118,7 @@ my_bool mthd_supported_buffer_type(enum enum_field_types type)
   case MYSQL_TYPE_NULL:
   case MYSQL_TYPE_SHORT:
   case MYSQL_TYPE_STRING:
+  case MYSQL_TYPE_JSON:
   case MYSQL_TYPE_TIME:
   case MYSQL_TYPE_TIMESTAMP:
   case MYSQL_TYPE_TINY:
@@ -551,6 +552,7 @@ int store_param(MYSQL_STMT *stmt, int column, unsigned char **p, unsigned long r
   case MYSQL_TYPE_VARCHAR:
   case MYSQL_TYPE_VAR_STRING:
   case MYSQL_TYPE_STRING:
+  case MYSQL_TYPE_JSON:
   case MYSQL_TYPE_DECIMAL:
   case MYSQL_TYPE_NEWDECIMAL:
   {
@@ -738,6 +740,7 @@ unsigned char* mysql_stmt_execute_generate_request(MYSQL_STMT *stmt, size_t *req
           case MYSQL_TYPE_VARCHAR:
           case MYSQL_TYPE_VAR_STRING:
           case MYSQL_TYPE_STRING:
+          case MYSQL_TYPE_JSON:
           case MYSQL_TYPE_DECIMAL:
           case MYSQL_TYPE_NEWDECIMAL:
           case MYSQL_TYPE_GEOMETRY:
@@ -968,6 +971,7 @@ my_bool STDCALL mysql_stmt_bind_param(MYSQL_STMT *stmt, MYSQL_BIND *bind)
         stmt->params[i].buffer_length= 5;
         break;
       case MYSQL_TYPE_STRING:
+      case MYSQL_TYPE_JSON:
       case MYSQL_TYPE_VAR_STRING:
       case MYSQL_TYPE_BLOB:
       case MYSQL_TYPE_TINY_BLOB: