test_sql_sqlmode.cc

/* Copyright (c) 2015, 2016, Oracle and/or its affiliates. All rights reserved.

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; version 2 of the License.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA */

#include <stdlib.h>
#include <my_global.h>
#include "my_sys.h"                             // my_write, my_malloc
#include <mysql/plugin.h>
#include "mysql_com.h"
#include "m_string.h"
#include "sql_string.h" /* STRING_PSI_MEMORY_KEY */

static const char *log_filename= "test_sql_sqlmode";

struct st_test_statement
{
  const char *db;
  bool generates_result_set;
  const char *query;
};

static struct st_test_statement test_query_plan[]=
{
  /* DB    RESULT  QUERY */
  { NULL , true , "SELECT 'first complex command' as a"},
  { NULL , true , "SELECT @@global.sql_mode" },
  { NULL , true , "SELECT @@session.sql_mode" },
  { NULL , false, "SET @@session.sql_mode = @@global.sql_mode" },
  { NULL , true , "SELECT @@global.sql_mode" },
  { NULL , true , "SELECT @@session.sql_mode" },
  /* SQL_MODE : NO_UNSIGNED_SUBTRACTION(Checking whether subtraction result is signed) */
  { NULL , true , "SELECT CAST(0 AS UNSIGNED) - 1" },

  /* Checking whether sql_mode value is getting changed or not */
  { NULL , false, "SET @@global.sql_mode = NO_ZERO_DATE" },
  { NULL , false, "SET @@session.sql_mode = NO_ZERO_DATE" },
  { NULL , true , "SELECT @@global.sql_mode" },
  { NULL , true , "SELECT @@session.sql_mode" },
  { NULL , false, "SET @@global.sql_mode = DEFAULT" },
  { NULL , false, "SET @@session.sql_mode = DEFAULT" },
  { NULL , true , "SELECT @@global.sql_mode" },
  { NULL , true , "SELECT @@session.sql_mode" },

  /* SQL_MODE : ANSI */
  {"test", true , "SELECT * FROM t1 WHERE t1.a IN (SELECT MAX(t1.b) FROM t2)" },
  { NULL , false, "SET @@session.sql_mode = ANSI" },
  { NULL , true , "SELECT @@session.sql_mode" },
  /* Expected error for invalid group function */
  {"test", true , "SELECT * FROM t1 WHERE t1.a IN (SELECT MAX(t1.b) FROM t2)" },

  /* SQL_MODE : STRICT_TRANS_TABLES */
  {"test", false, "SET @@session.sql_mode = STRICT_TRANS_TABLES" },
  { NULL , true , "SELECT @@session.sql_mode" },
  {"test", false, "INSERT INTO t2 VALUES(NULL,'t2b1')" },
  /* Expected error Bad NULL value */
  {"test", false, "INSERT INTO t1 SELECT * FROM t2" },
  /* Should return no rows in columns a and b */
  {"test", true , "SELECT * FROM t1 WHERE a = 't2a2'" },

  /* SQL_MODE : TRADITIONAL */
  {"test", false, "SET @@session.sql_mode = TRADITIONAL" },
  { NULL , true , "SELECT @@session.sql_mode" },
  {"test", false, "INSERT INTO t2 VALUES(NULL,'t2b1')" },
  /* Expected error Bad NULL value */
  {"test", false, "INSERT INTO t1 SELECT * FROM t2" },
  /* Should return no rows in columns a and b */
  {"test", true , "SELECT * FROM t1 WHERE a = 't2a2'" },

  { NULL , false, "SET @@global.sql_mode = NO_UNSIGNED_SUBTRACTION" },
  { NULL , false, "SET @@session.sql_mode = NO_UNSIGNED_SUBTRACTION" }
};

#define STRING_BUFFER_SIZE 512

#define WRITE_STR(format) \
  { \
    const size_t blen= my_snprintf(buffer, sizeof(buffer), (format)); \
    my_write(outfile, (uchar*) buffer, blen, MYF(0)); \
    /*pctx->log.append(buffer, blen); */ \
  }


#define WRITE_VAL(format,value) \
  { \
    const size_t blen= my_snprintf(buffer, sizeof(buffer), (format), (value)); \
    my_write(outfile,(uchar*)buffer, blen, MYF(0)); \
   /* pctx->log.append(buffer, blen); */ \
  }

#define WRITE_VAL2(format,value1, value2) \
  { \
    const size_t blen= my_snprintf(buffer, sizeof(buffer), (format), (value1), (value2)); \
    my_write(outfile,(uchar*) buffer, blen, MYF(0)); \
    /* pctx->log.append(buffer, blen); */ \
  }

static const char *sep = "========================================================================\n";

#define WRITE_SEP() my_write(outfile, (uchar*)sep, strlen(sep), MYF(0))

static const char *user_localhost = "localhost";
static const char *user_local = "127.0.0.1";
static const char *user_db= "";
static const char *user_privileged= "root";
//static const char *user_ordinary= "ordinary";

static void switch_user(MYSQL_SESSION session, const char *user)
{
  MYSQL_SECURITY_CONTEXT sc;
  thd_get_security_context(srv_session_info_get_thd(session), &sc);
  security_context_lookup(sc, user, user_localhost, user_local, user_db);
}

static File outfile;

struct st_send_field_n
{
  char db_name[256];
  char table_name[256];
  char org_table_name[256];
  char col_name[256];
  char org_col_name[256];
  unsigned long length;
  unsigned int charsetnr;
  unsigned int flags;
  unsigned int decimals;
  enum_field_types type;
};

#define SIZEOF_SQL_STR_VALUE 256

struct st_plugin_ctx
{
  const CHARSET_INFO *resultcs;
  uint meta_server_status;
  uint meta_warn_count;
  uint current_col;
  uint num_cols;
  uint num_rows;
  st_send_field_n sql_field[64];
  char sql_str_value[64][64][SIZEOF_SQL_STR_VALUE];
  size_t sql_str_len[64][64];

  uint server_status;
  uint warn_count;
  uint affected_rows;
  uint last_insert_id;
  char message[1024];

  uint sql_errno;
  char err_msg[1024];
  char sqlstate[6];

  std::string log;
  st_plugin_ctx()
  {
    reset();
  }

  void reset()
  {
    resultcs= NULL;
    meta_server_status = 0;
    meta_warn_count = 0;
    server_status= 0;
    current_col= 0;
    warn_count= 0;
    num_cols= 0;
    num_rows= 0;
    memset(&sql_field, 0, 64 * sizeof(st_send_field_n));
    memset(&sql_str_value, 0, 64 * 64 * SIZEOF_SQL_STR_VALUE * sizeof(char));
    memset(&sql_str_len, 0, 64 * 64 * sizeof(size_t));

    server_status= 0;
    warn_count= 0;
    affected_rows= 0;
    last_insert_id= 0;
    memset(&message, 0, sizeof(message));

    sql_errno= 0;
    memset(&err_msg, 0, sizeof(err_msg));
    memset(&sqlstate, 0, sizeof(sqlstate));

    log.clear();
  }
};


static int sql_start_result_metadata(void *ctx, uint num_cols, uint flags,
                                     const CHARSET_INFO *resultcs)
{
  struct st_plugin_ctx *pctx= (struct st_plugin_ctx*) ctx;
//  WRITE_STR("sql_start_result_metadata\n");
  DBUG_ENTER("sql_start_result_metadata");
  DBUG_PRINT("info",("resultcs->number: %d", resultcs->number));
  DBUG_PRINT("info",("resultcs->csname: %s", resultcs->csname));
  DBUG_PRINT("info",("resultcs->name: %s", resultcs->name));
  pctx->num_cols= num_cols;
  pctx->resultcs= resultcs;
  pctx->current_col= 0;

  DBUG_RETURN(false);
};


static int sql_field_metadata(void *ctx, struct st_send_field *field,
                              const CHARSET_INFO *charset)
{
  struct st_plugin_ctx *pctx= (struct st_plugin_ctx*) ctx;
  st_send_field_n *cfield= &pctx->sql_field[pctx->current_col];
//  WRITE_STR("sql_field_metadata\n");
  DBUG_ENTER("sql_field_metadata");
  DBUG_PRINT("info",("field->db_name: %s", field->db_name));
  DBUG_PRINT("info",("field->table_name: %s", field->table_name));
  DBUG_PRINT("info",("field->org_table_name: %s", field->org_table_name));
  DBUG_PRINT("info",("field->col_name: %s", field->col_name));
  DBUG_PRINT("info",("field->org_col_name: %s", field->org_col_name));
  DBUG_PRINT("info",("field->length: %d", (int)field->length));
  DBUG_PRINT("info",("field->charsetnr: %d", (int)field->charsetnr));
  DBUG_PRINT("info",("field->flags: %d", (int)field->flags));
  DBUG_PRINT("info",("field->decimals: %d", (int)field->decimals));
  DBUG_PRINT("info",("field->type: %d", (int)field->type));

  strcpy(cfield->db_name,        (char*)field->db_name);
  strcpy(cfield->table_name,     (char*)field->table_name);
  strcpy(cfield->org_table_name, (char*)field->org_table_name);
  strcpy(cfield->col_name,       (char*)field->col_name);
  strcpy(cfield->org_col_name,   (char*)field->org_col_name);
  cfield->length=    field->length;
  cfield->charsetnr= field->charsetnr;
  cfield->flags=     field->flags;
  cfield->decimals=  field->decimals;
  cfield->type=      field->type;

  pctx->current_col++;
  DBUG_RETURN(false);
};


static int sql_end_result_metadata(void *ctx, uint server_status,
                                   uint warn_count)
{
  struct st_plugin_ctx *pctx= (struct st_plugin_ctx*) ctx;
//  WRITE_STR("sql_end_result_metadata\n");
  DBUG_ENTER("sql_end_result_metadata");
  pctx->meta_server_status= server_status;
  pctx->meta_warn_count= warn_count;
  pctx->num_rows= 0;
  DBUG_RETURN(false);
};


static int sql_start_row(void *ctx)
{
  struct st_plugin_ctx *pctx= (struct st_plugin_ctx*) ctx;
//  WRITE_STR("sql_start_row\n");
  DBUG_ENTER("sql_start_row");
  pctx->current_col= 0;
  DBUG_RETURN(false);
};


static int sql_end_row(void *ctx)
{
  struct st_plugin_ctx *pctx= (struct st_plugin_ctx*) ctx;
//  WRITE_STR("sql_end_row\n");
  DBUG_ENTER("sql_end_row");
  pctx->num_rows++;
  DBUG_RETURN(false);
};


static void sql_abort_row(void *ctx)
{
  DBUG_ENTER("sql_abort_row");
  DBUG_VOID_RETURN;
};


static ulong sql_get_client_capabilities(void *ctx)
{
  DBUG_ENTER("sql_get_client_capabilities");
  DBUG_RETURN(0);
};


static int sql_get_null(void *ctx)
{
  struct st_plugin_ctx *pctx= (struct st_plugin_ctx*) ctx;
//  WRITE_STR("sql_get_null\n");
  DBUG_ENTER("sql_get_null");
  uint row= pctx->num_rows;
  uint col= pctx->current_col;
  pctx->current_col++;

  strncpy(pctx->sql_str_value[row][col], "[NULL]", sizeof("[NULL]")-1);
  pctx->sql_str_len[row][col]=  sizeof("[NULL]")-1;

  DBUG_RETURN(false);
};


static int sql_get_integer(void * ctx, longlong value)
{
  char buffer[1024];
  struct st_plugin_ctx *pctx= (struct st_plugin_ctx*) ctx;
//  WRITE_STR("sql_get_integer\n");
  DBUG_ENTER("sql_get_integer");
  uint row= pctx->num_rows;
  uint col= pctx->current_col;
  pctx->current_col++;

  size_t len= my_snprintf(buffer, sizeof(buffer), "%d", value);

  strncpy(pctx->sql_str_value[row][col], buffer, len);
  pctx->sql_str_len[row][col]= len;

  DBUG_RETURN(false);
};


static int sql_get_longlong(void * ctx, longlong value, uint is_unsigned)
{
  char buffer[1024];
  struct st_plugin_ctx *pctx= (struct st_plugin_ctx*) ctx;
//  WRITE_STR("sql_get_longlong\n");
  DBUG_ENTER("sql_get_longlong");
  uint row= pctx->num_rows;
  uint col= pctx->current_col;
  pctx->current_col++;

  size_t len= my_snprintf(buffer, sizeof(buffer),
                          is_unsigned? "%llu":"%lld", value);

  strncpy(pctx->sql_str_value[row][col], buffer, len);
  pctx->sql_str_len[row][col]= len;

  DBUG_RETURN(false);
};


static const char *test_decimal_as_string(char *buff, const decimal_t *val, int *length)
{
  if (!val)
    return "NULL";
  (void)decimal2string(val, buff, length, 0,0,0);
  return buff;
}


static int sql_get_decimal(void * ctx, const decimal_t * value)
{
  struct st_plugin_ctx *pctx= (struct st_plugin_ctx*) ctx;
//  WRITE_STR("sql_get_decimal\n");
  DBUG_ENTER("sql_get_decimal");
  uint row= pctx->num_rows;
  uint col= pctx->current_col;
  pctx->current_col++;

  int len= SIZEOF_SQL_STR_VALUE;
  test_decimal_as_string(pctx->sql_str_value[row][col], value, &len);
  pctx->sql_str_len[row][col]= len;

  DBUG_RETURN(false);
};


static int sql_get_double(void * ctx, double value, uint32 decimals)
{
  char buffer[1024];
  struct st_plugin_ctx *pctx= (struct st_plugin_ctx*) ctx;
//  WRITE_STR("sql_get_double\n");
  DBUG_ENTER("sql_get_double");
  uint row= pctx->num_rows;
  uint col= pctx->current_col;
  pctx->current_col++;

  size_t len= my_snprintf(buffer, sizeof(buffer), "%3.7g", value);

  strncpy(pctx->sql_str_value[row][col], buffer, len);
  pctx->sql_str_len[row][col]= len;

  DBUG_RETURN(false);
};


static int sql_get_date(void * ctx, const MYSQL_TIME * value)
{
  char buffer[1024];
  struct st_plugin_ctx *pctx= (struct st_plugin_ctx*) ctx;
//  WRITE_STR("sql_get_date\n");
  DBUG_ENTER("sql_get_date");
  uint row= pctx->num_rows;
  uint col= pctx->current_col;
  pctx->current_col++;

  size_t len= my_snprintf(buffer, sizeof(buffer),
                          "%s%4d-%02d-%02d",
                          value->neg? "-":"",
                          value->year, value->month, value->day);

  strncpy(pctx->sql_str_value[row][col], buffer, len);
  pctx->sql_str_len[row][col]= len;

  DBUG_RETURN(false);
};


static int sql_get_time(void * ctx, const MYSQL_TIME * value, uint decimals)
{
  char buffer[1024];
  struct st_plugin_ctx *pctx= (struct st_plugin_ctx*) ctx;
//  WRITE_STR("sql_get_time\n");
  DBUG_ENTER("sql_get_time");
  uint row= pctx->num_rows;
  uint col= pctx->current_col;
  pctx->current_col++;

  size_t len= my_snprintf(buffer, sizeof(buffer),
                          "%s%02d:%02d:%02d",
                          value->neg? "-":"",
                          value->day? (value->day*24 + value->hour):value->hour,
                          value->minute, value->second);

  strncpy(pctx->sql_str_value[row][col], buffer, len);
  pctx->sql_str_len[row][col]= len;
  DBUG_RETURN(false);
};


static int sql_get_datetime(void * ctx, const MYSQL_TIME * value, uint decimals)
{
  char buffer[1024];
  struct st_plugin_ctx *pctx= (struct st_plugin_ctx*) ctx;
//  WRITE_STR("sql_get_datetime\n");
  DBUG_ENTER("sql_get_datetime");
  uint row= pctx->num_rows;
  uint col= pctx->current_col;
  pctx->current_col++;

  size_t len= my_snprintf(buffer, sizeof(buffer),
                          "%s%4d-%02d-%02d %02d:%02d:%02d",
                          value->neg? "-":"",
                          value->year, value->month, value->day,
                          value->hour, value->minute, value->second);

  strncpy(pctx->sql_str_value[row][col], buffer, len);
  pctx->sql_str_len[row][col]= len;


  DBUG_RETURN(false);
};


static int sql_get_string(void * ctx, const char * const value, size_t length,
                          const CHARSET_INFO * const valuecs)
{
  struct st_plugin_ctx *pctx= (struct st_plugin_ctx*) ctx;
//  WRITE_STR("sql_get_string\n");
  DBUG_ENTER("sql_get_string");
  uint row= pctx->num_rows;
  uint col= pctx->current_col;
  pctx->current_col++;

  strncpy(pctx->sql_str_value[row][col], value, length);
  pctx->sql_str_len[row][col]= length;

  DBUG_RETURN(false);
};


static void sql_handle_ok(void * ctx,
                          uint server_status, uint statement_warn_count,
                          ulonglong affected_rows, ulonglong last_insert_id,
                          const char * const message)
{
  struct st_plugin_ctx *pctx= (struct st_plugin_ctx*) ctx;
//  WRITE_STR("sql_handle_ok\n");
  DBUG_ENTER("sql_handle_ok");
  /* This could be an EOF */
  if (!pctx->num_cols)
    pctx->num_rows= 0;
  pctx->server_status=  server_status;
  pctx->warn_count=     statement_warn_count;
  pctx->affected_rows=  affected_rows;
  pctx->last_insert_id= last_insert_id;
  if (message)
    strncpy(pctx->message, message, sizeof(pctx->message));

  DBUG_VOID_RETURN;
};


static void sql_handle_error(void * ctx, uint sql_errno,
                             const char * const err_msg,
                             const char * const sqlstate)
{
  char buffer[1024];
  struct st_plugin_ctx *pctx= (struct st_plugin_ctx*) ctx;
//  WRITE_STR("sql_handle_error\n");
  DBUG_ENTER("sql_handle_error");
  WRITE_VAL2("[%u][%s]", sql_errno, sqlstate);
  WRITE_VAL("[%s]\n", err_msg);
  pctx->num_rows= 0;
  DBUG_VOID_RETURN;
};


static void sql_shutdown(void *ctx, int shutdown_server)
{
  DBUG_ENTER("sql_shutdown");
  DBUG_VOID_RETURN;
};


const struct st_command_service_cbs protocol_callbacks=
{
  sql_start_result_metadata,
  sql_field_metadata,
  sql_end_result_metadata,
  sql_start_row,
  sql_end_row,
  sql_abort_row,
  sql_get_client_capabilities,
  sql_get_null,
  sql_get_integer,
  sql_get_longlong,
  sql_get_decimal,
  sql_get_double,
  sql_get_date,
  sql_get_time,
  sql_get_datetime,
  sql_get_string,
  sql_handle_ok,
  sql_handle_error,
  sql_shutdown,
};

#define WRITE_DASHED_LINE() \
  WRITE_STR("------------------------------------------------------------------\n");

static const char *fieldtype2str(enum enum_field_types type)
{
  switch (type) {
    case MYSQL_TYPE_BIT:         return "BIT";
    case MYSQL_TYPE_BLOB:        return "BLOB";
    case MYSQL_TYPE_DATE:        return "DATE";
    case MYSQL_TYPE_DATETIME:    return "DATETIME";
    case MYSQL_TYPE_NEWDECIMAL:  return "NEWDECIMAL";
    case MYSQL_TYPE_DECIMAL:     return "DECIMAL";
    case MYSQL_TYPE_DOUBLE:      return "DOUBLE";
    case MYSQL_TYPE_ENUM:        return "ENUM";
    case MYSQL_TYPE_FLOAT:       return "FLOAT";
    case MYSQL_TYPE_GEOMETRY:    return "GEOMETRY";
    case MYSQL_TYPE_INT24:       return "INT24";
    case MYSQL_TYPE_LONG:        return "LONG";
    case MYSQL_TYPE_LONGLONG:    return "LONGLONG";
    case MYSQL_TYPE_LONG_BLOB:   return "LONG_BLOB";
    case MYSQL_TYPE_MEDIUM_BLOB: return "MEDIUM_BLOB";
    case MYSQL_TYPE_NEWDATE:     return "NEWDATE";
    case MYSQL_TYPE_NULL:        return "NULL";
    case MYSQL_TYPE_SET:         return "SET";
    case MYSQL_TYPE_SHORT:       return "SHORT";
    case MYSQL_TYPE_STRING:      return "STRING";
    case MYSQL_TYPE_TIME:        return "TIME";
    case MYSQL_TYPE_TIMESTAMP:   return "TIMESTAMP";
    case MYSQL_TYPE_TINY:        return "TINY";
    case MYSQL_TYPE_TINY_BLOB:   return "TINY_BLOB";
    case MYSQL_TYPE_VARCHAR:     return "VARCHAR";
    case MYSQL_TYPE_VAR_STRING:  return "VAR_STRING";
    case MYSQL_TYPE_YEAR:        return "YEAR";
    default:                     return "?-unknown-?";
  }
}


static char *fieldflags2str(uint f)
{
  static char buf[1024];
  char *s=buf;
  *s=0;
#define ff2s_check_flag(X)  if (f & X ## _FLAG) { s=my_stpcpy(s, # X " "); f &= ~ X ## _FLAG; }
  ff2s_check_flag(NOT_NULL);
  ff2s_check_flag(PRI_KEY);
  ff2s_check_flag(UNIQUE_KEY);
  ff2s_check_flag(MULTIPLE_KEY);
  ff2s_check_flag(BLOB);
  ff2s_check_flag(UNSIGNED);
  ff2s_check_flag(ZEROFILL);
  ff2s_check_flag(BINARY);
  ff2s_check_flag(ENUM);
  ff2s_check_flag(AUTO_INCREMENT);
  ff2s_check_flag(TIMESTAMP);
  ff2s_check_flag(SET);
  ff2s_check_flag(NO_DEFAULT_VALUE);
  ff2s_check_flag(NUM);
  ff2s_check_flag(PART_KEY);
  ff2s_check_flag(GROUP);
  ff2s_check_flag(UNIQUE);
  ff2s_check_flag(BINCMP);
  ff2s_check_flag(ON_UPDATE_NOW);
#undef ff2s_check_flag
  if (f)
    sprintf(s, " unknown=0x%04x", f);
  return buf;
}


static void dump_meta_field(st_send_field_n field)
{
  char buffer[STRING_BUFFER_SIZE];

  WRITE_VAL("\t\t\t[meta][field] db name: %s\n",   field.db_name);
  WRITE_VAL("\t\t\t[meta][field] table name: %s\n",field.table_name);
  WRITE_VAL("\t\t\t[meta][field] org table name: %s\n",field.org_table_name);
  WRITE_VAL("\t\t\t[meta][field] col name: %s\n",   field.col_name);
  WRITE_VAL("\t\t\t[meta][field] org col name: %s\n",field.org_col_name);
  WRITE_VAL("\t\t\t[meta][field] length: %u\n",(uint)field.length);
  WRITE_VAL("\t\t\t[meta][field] charsetnr: %u\n", field.charsetnr);

  WRITE_VAL("\t\t\t[meta][field] flags: %u", field.flags);
  if (field.flags)
    WRITE_VAL(" (%s)", fieldflags2str(field.flags));
  WRITE_STR("\n");

  WRITE_VAL("\t\t\t[meta][field] decimals: %u\n",  field.decimals);

  WRITE_VAL2("\t\t\t[meta][field] type: %s (%u)\n",
             fieldtype2str(field.type), field.type);
}


static void dump_cs_info(const CHARSET_INFO *cs)
{
  char buffer[STRING_BUFFER_SIZE];
  if (!cs)
  {
    WRITE_STR("\t\t[meta] no charset\n");
    return;
  }

  WRITE_VAL("\t\t[meta][charset result] number: %d\n",   cs->number);
  WRITE_VAL("\t\t[meta][charset result] name: %s\n",     cs->csname);
  WRITE_VAL("\t\t[meta][charset result] collation: %s\n",cs->name);
  WRITE_VAL("\t\t[meta][charset result] sort order: %s\n", cs->sort_order);
}


static void dump_decoded_server_status(const char *prefix, uint server_status)
{
  char buffer[STRING_BUFFER_SIZE];
  WRITE_STR(prefix);
  WRITE_VAL("%u\n", server_status);
  WRITE_STR(prefix);
  for (int i= 0; i < 30; i++)
  {
    uint flag= 1 << i;
    if (server_status & flag)
    {
#define FLAG_DELIMITER " "
      switch (flag) {
      case SERVER_STATUS_IN_TRANS:          WRITE_STR("IN_TRANS" FLAG_DELIMITER);break;
      case SERVER_STATUS_AUTOCOMMIT:        WRITE_STR("AUTOCOMMIT" FLAG_DELIMITER);break;
      case SERVER_MORE_RESULTS_EXISTS:      WRITE_STR("MORE_RESULTS_EXISTS" FLAG_DELIMITER);break;
      case SERVER_QUERY_NO_GOOD_INDEX_USED: WRITE_STR("QUERY_NO_GOOD_INDEX_USED" FLAG_DELIMITER);break;
      case SERVER_QUERY_NO_INDEX_USED:      WRITE_STR("QUERY_NO_INDEX_USED" FLAG_DELIMITER);break;
      case SERVER_STATUS_CURSOR_EXISTS:     WRITE_STR("CURSOR_EXISTS" FLAG_DELIMITER);break;
      case SERVER_STATUS_LAST_ROW_SENT:     WRITE_STR("LAST_ROW_SENT" FLAG_DELIMITER);break;
      case SERVER_STATUS_DB_DROPPED:        WRITE_STR("DB_DROPPED" FLAG_DELIMITER);break;
      case SERVER_STATUS_NO_BACKSLASH_ESCAPES:WRITE_STR("NO_BACKSLASH_ESCAPES" FLAG_DELIMITER);break;
      case SERVER_STATUS_METADATA_CHANGED:  WRITE_STR("METADATA_CHANGED" FLAG_DELIMITER);break;
      case SERVER_QUERY_WAS_SLOW:           WRITE_STR("QUERY_WAS_SLOW" FLAG_DELIMITER);break;
      case SERVER_PS_OUT_PARAMS:            WRITE_STR("PS_OUT_PARAMS" FLAG_DELIMITER);break;
      case SERVER_STATUS_IN_TRANS_READONLY: WRITE_STR("IN_TRANS_READONLY" FLAG_DELIMITER);break;
      case SERVER_SESSION_STATE_CHANGED:    WRITE_STR("STATE_CHANGED" FLAG_DELIMITER);break;
      default:
        // Add a new flag defined in mysql_com.h above to fix this
        WRITE_VAL("UNKNOWN_%u\n", flag); 
      }
#undef FLAG_DELIMITER
    }
  }
  WRITE_STR("\n");
}


static void dump_meta_info(struct st_plugin_ctx *ctx)
{
  char buffer[STRING_BUFFER_SIZE];

  WRITE_VAL("\t\t[meta] rows: %u\n", ctx->num_rows);
  WRITE_VAL("\t\t[meta] cols: %u\n", ctx->num_cols);
  dump_decoded_server_status("\t\t[meta] server status: ", ctx->meta_server_status);
  WRITE_VAL("\t\t[meta] warning count: %u\n", ctx->meta_warn_count);
  WRITE_STR("\n");

  if (!ctx->num_cols)
  {
    WRITE_STR("\t\t[meta] no columns\n");
  }
  else
    for (uint col= 0; col < ctx->num_cols; col++)
    {
      dump_meta_field(ctx->sql_field[col]);
      WRITE_STR("\n");
    }

  WRITE_STR("\n");

  dump_cs_info(ctx->resultcs);
}


static void dump_result_set(struct st_plugin_ctx *ctx)
{
  char buffer[STRING_BUFFER_SIZE];

  if (!ctx->num_rows)
    WRITE_STR("\t\t[data] no rows\n");

  for (uint row=0; row < ctx->num_rows; row++)
  {
    if (row)
      WRITE_STR("\n");
    for (uint col=0; col < ctx->num_cols; col++)
    {
      WRITE_VAL2("\t\t[data][%s.%s]", ctx->sql_field[col].table_name,
                                       ctx->sql_field[col].col_name);
      WRITE_VAL2("[%3u][%s]\n", (uint) ctx->sql_str_len[row][col],
                                       ctx->sql_str_value[row][col]);
    }
  }
}


static void dump_closing_ok(struct st_plugin_ctx *ctx)
{
  char buffer[STRING_BUFFER_SIZE];

  dump_decoded_server_status("\t\t[end] server status: ", ctx->server_status);
  WRITE_VAL("\t\t[end] warning count:  %u\n", ctx->warn_count);
  WRITE_VAL("\t\t[end] affected rows:  %u\n", ctx->affected_rows);
  WRITE_VAL("\t\t[end] last insert id: %u\n", ctx->last_insert_id);
  WRITE_VAL("\t\t[end] message: %s\n", ctx->message);
}


static void set_query_in_com_data(const char *query, union COM_DATA *cmd)
{
  char buffer[STRING_BUFFER_SIZE];

  cmd->com_query.query= (char *) query;
  cmd->com_query.length= strlen(query);
  WRITE_VAL2("EXECUTING:[%u][%s]\n", cmd->com_query.length, query);\
}


static void run_statement(MYSQL_SESSION session, const char *query,
                          struct st_plugin_ctx *ctx,
                          bool generates_result_set, void *p)
{
  char buffer[STRING_BUFFER_SIZE];
  COM_DATA cmd;

  WRITE_DASHED_LINE();
  set_query_in_com_data(query, &cmd);

  enum cs_text_or_binary txt_or_bin= CS_TEXT_REPRESENTATION;

  WRITE_STR("[CS_TEXT_REPRESENTATION]\n");
again:
  ctx->reset();
  int fail= command_service_run_command(session, COM_QUERY, &cmd,
                                        &my_charset_utf8_general_ci,
                                        &protocol_callbacks, txt_or_bin, ctx);
  if (fail)
  {
    my_plugin_log_message(&p, MY_ERROR_LEVEL, "run_statement code: %d\n", fail);
    return;
  }

  dump_meta_info(ctx);    WRITE_STR("\n");

  dump_result_set(ctx);   WRITE_STR("\n");

  dump_closing_ok(ctx);

  if (generates_result_set && txt_or_bin == CS_TEXT_REPRESENTATION)
  {
    txt_or_bin= CS_BINARY_REPRESENTATION;
    WRITE_STR("[CS_BINARY_REPRESENTATION]\n");
    goto again;
  }
}


void static change_current_db(MYSQL_SESSION session, const char * db,
                              struct st_plugin_ctx *ctx, void *p)
{
  char buffer[STRING_BUFFER_SIZE];
  COM_DATA cmd;
  cmd.com_init_db.db_name= db;
  cmd.com_init_db.length= strlen(db);

  WRITE_DASHED_LINE();
  WRITE_VAL("EXECUTING:[COM_INIT_DB][%s]\n",db);
  ctx->reset();
  int fail= command_service_run_command(session, COM_INIT_DB, &cmd,
                                        &my_charset_utf8_general_ci,
                                        &protocol_callbacks,
                                        CS_TEXT_REPRESENTATION,
                                        ctx);
  if (fail)
    my_plugin_log_message(&p, MY_ERROR_LEVEL, "change db code: %d\n", fail);
}


void test_selects(MYSQL_SESSION session, void *p)
{
  DBUG_ENTER("test_selects");
  char buffer[STRING_BUFFER_SIZE];

  struct st_plugin_ctx *plugin_ctx= new st_plugin_ctx();

  const char *last_db= NULL;
  size_t stmt_count= sizeof(test_query_plan) / sizeof(test_query_plan[0]);
  for (size_t i= 0; i < stmt_count; i++)
  {
    /* Change current DB if needed */
    if (last_db != test_query_plan[i].db)
    {
      last_db= test_query_plan[i].db;

      change_current_db(session, last_db? last_db:"", plugin_ctx, p);
    }
    run_statement(session, test_query_plan[i].query, plugin_ctx,
                  test_query_plan[i].generates_result_set, p);

    last_db= NULL;
  }  

  WRITE_DASHED_LINE();

  delete plugin_ctx;
  DBUG_VOID_RETURN;
}


static void test_sql(void *p)
{
  char buffer[STRING_BUFFER_SIZE];
  DBUG_ENTER("test_sql");

  WRITE_STR("[srv_session_open]\n");
  MYSQL_SESSION session= srv_session_open(NULL, NULL);
  if (!session)
  {
    my_plugin_log_message(&p, MY_ERROR_LEVEL, "srv_session_open failed.");
    DBUG_VOID_RETURN;
  }

  switch_user(session, user_privileged);

  test_selects(session, p);

  /* close session 1: Must pass */
  WRITE_STR("[srv_session_close]\n");
  if (srv_session_close(session))
    my_plugin_log_message(&p, MY_ERROR_LEVEL, "srv_session_close failed.");

  DBUG_VOID_RETURN;
}


struct test_thread_context
{
  my_thread_handle thread;
  void *p;
  bool thread_finished;
  void (*test_function)(void *);
};


static void* test_sql_threaded_wrapper(void *param)
{
  char buffer[STRING_BUFFER_SIZE];
  struct test_thread_context *context= (struct test_thread_context*) param;

  WRITE_SEP();
  WRITE_STR("init thread\n");
  if (srv_session_init_thread(context->p))
    my_plugin_log_message(&context->p, MY_ERROR_LEVEL, "srv_session_init_thread failed.");

  context->test_function(context->p);

  WRITE_STR("deinit thread\n");
  srv_session_deinit_thread();

  context->thread_finished= true;
  return NULL;
}


static void create_log_file(const char * log_name)
{
  char filename[FN_REFLEN];

  fn_format(filename, log_name, "", ".log",
            MY_REPLACE_EXT | MY_UNPACK_FILENAME);
  unlink(filename);
  outfile= my_open(filename, O_CREAT|O_RDWR, MYF(0));
}


static void test_in_spawned_thread(void *p, void (*test_function)(void *))
{
  my_thread_attr_t attr;          /* Thread attributes */
  my_thread_attr_init(&attr);
  (void) my_thread_attr_setdetachstate(&attr, MY_THREAD_CREATE_JOINABLE);

  struct test_thread_context context;

  context.p= p;
  context.thread_finished= false;
  context.test_function= test_function;

  /* now create the thread and call test_session within the thread. */
  if (my_thread_create(&(context.thread), &attr, test_sql_threaded_wrapper, &context) != 0)
    my_plugin_log_message(&p, MY_ERROR_LEVEL, "Could not create test session thread");
  else
    my_thread_join(&context.thread, NULL);
}

static int test_sql_service_plugin_init(void *p)
{
  char buffer[STRING_BUFFER_SIZE];
  DBUG_ENTER("test_sql_service_plugin_init");
  my_plugin_log_message(&p, MY_INFORMATION_LEVEL, "Installation.");

  create_log_file(log_filename);

  WRITE_SEP();
  WRITE_STR("Test in a server thread\n");
  test_sql(p);

  /* Test in a new thread */
  WRITE_STR("Follows threaded run\n");
  test_in_spawned_thread(p, test_sql);

  my_close(outfile, MYF(0));

  DBUG_RETURN(0);
}


static int test_sql_service_plugin_deinit(void *p)
{
  DBUG_ENTER("test_sql_service_plugin_deinit");
  my_plugin_log_message(&p, MY_INFORMATION_LEVEL, "Uninstallation.");
  DBUG_RETURN(0);
}


static struct st_mysql_daemon test_sql_service_plugin=
{ MYSQL_DAEMON_INTERFACE_VERSION };


/*
  Plugin library descriptor
*/

mysql_declare_plugin(test_daemon)
{
  MYSQL_DAEMON_PLUGIN,
  &test_sql_service_plugin,
  "test_sql_sqlmode",
  "Pavan Naik, Andrey Hristov",
  "Test sql sql_mode",
  PLUGIN_LICENSE_GPL,
  test_sql_service_plugin_init,   /* Plugin Init      */
  test_sql_service_plugin_deinit, /* Plugin Deinit    */
  0x0100,                         /* 1.0              */
  NULL,                           /* status variables */
  NULL,                           /* system variables */
  NULL,                           /* config options   */
  0,                              /* flags            */
}
mysql_declare_plugin_end;