merge from 5.5-mtr

client/mysqltest.cc

@@ -487,7 +487,8 @@ VAR* var_init(VAR* v, const char *name, int name_len, const char *val,
               int val_len);
 VAR* var_get(const char *var_name, const char** var_name_end,
              my_bool raw, my_bool ignore_not_existing);
-void eval_expr(VAR* v, const char *p, const char** p_end);
+void eval_expr(VAR* v, const char *p, const char** p_end,
+               bool open_end=false, bool backtick=true);
 my_bool match_delimiter(int c, const char *delim, uint length);
 void dump_result_to_reject_file(char *buf, int size);
 void dump_warning_messages();
@@ -2045,9 +2046,11 @@ static void var_free(void *v)
 
 C_MODE_END
 
-void var_set_int(VAR *v, const char *str)
+void var_check_int(VAR *v)
 {
   char *endptr;
+  char *str= v->str_val;
+  
   /* Initially assume not a number */
   v->int_val= 0;
   v->is_int= false;
@@ -2094,7 +2097,7 @@ VAR *var_init(VAR *v, const char *name, int name_len, const char *val,
     memcpy(tmp_var->str_val, val, val_len);
     tmp_var->str_val[val_len]= 0;
   }
-  var_set_int(tmp_var, val);
+  var_check_int(tmp_var);
   tmp_var->name_len = name_len;
   tmp_var->str_val_len = val_len;
   tmp_var->alloced_len = val_alloc_len;
@@ -2335,7 +2338,8 @@ void var_query_set(VAR *var, const char *query, const char** query_end)
       dynstr_append_mem(&result, "\t", 1);
     }
     end= result.str + result.length-1;
-    eval_expr(var, result.str, (const char**) &end);
+    /* Evaluation should not recurse via backtick */
+    eval_expr(var, result.str, (const char**) &end, false, false);
     dynstr_free(&result);
   }
   else
@@ -2545,7 +2549,8 @@ void var_copy(VAR *dest, VAR *src)
 }
 
 
-void eval_expr(VAR *v, const char *p, const char **p_end)
+void eval_expr(VAR *v, const char *p, const char **p_end,
+               bool open_end, bool backtick)
 {
 
   DBUG_ENTER("eval_expr");
@@ -2563,14 +2568,14 @@ void eval_expr(VAR *v, const char *p, const char **p_end)
 
     /* Make sure there was just a $variable and nothing else */
     const char* end= *p_end + 1;
-    if (end < expected_end)
+    if (end < expected_end && !open_end)
       die("Found junk '%.*s' after $variable in expression",
           (int)(expected_end - end - 1), end);
 
     DBUG_VOID_RETURN;
   }
 
-  if (*p == '`')
+  if (*p == '`' && backtick)
   {
     var_query_set(v, p, p_end);
     DBUG_VOID_RETURN;
@@ -2610,7 +2615,7 @@ void eval_expr(VAR *v, const char *p, const char **p_end)
     v->str_val_len = new_val_len;
     memcpy(v->str_val, p, new_val_len);
     v->str_val[new_val_len] = 0;
-    var_set_int(v, p);
+    var_check_int(v);
   }
   DBUG_VOID_RETURN;
 }
@@ -4240,7 +4245,7 @@ int do_save_master_pos()
         const char latest_applied_binlog_epoch_str[]=
           "latest_applied_binlog_epoch=";
         if (count)
-          sleep(1);
+          my_sleep(100*1000); /* 100ms */
         if (mysql_query(mysql, query= "show engine ndb status"))
           die("failed in '%s': %d %s", query,
               mysql_errno(mysql), mysql_error(mysql));
@@ -4329,7 +4334,7 @@ int do_save_master_pos()
 	count++;
 	if (latest_handled_binlog_epoch >= start_epoch)
           do_continue= 0;
-        else if (count > 30)
+        else if (count > 300) /* 30s */
 	{
 	  break;
         }
@@ -5521,6 +5526,40 @@ int do_done(struct st_command *command)
   return 0;
 }
 
+/* Operands available in if or while conditions */
+
+enum block_op {
+  EQ_OP,
+  NE_OP,
+  GT_OP,
+  GE_OP,
+  LT_OP,
+  LE_OP,
+  ILLEG_OP
+};
+
+
+enum block_op find_operand(const char *start)
+{
+ char first= *start;
+ char next= *(start+1);
+ 
+ if (first == '=' && next == '=')
+   return EQ_OP;
+ if (first == '!' && next == '=')
+   return NE_OP;
+ if (first == '>' && next == '=')
+   return GE_OP;
+ if (first == '>')
+   return GT_OP;
+ if (first == '<' && next == '=')
+   return LE_OP;
+ if (first == '<')
+   return LT_OP;
+ 
+ return ILLEG_OP;
+}
+
 
 /*
   Process start of a "if" or "while" statement
@@ -5546,6 +5585,13 @@ int do_done(struct st_command *command)
   A '!' can be used before the <expr> to indicate it should
   be executed if it evaluates to zero.
 
+  <expr> can also be a simple comparison condition:
+
+  <variable> <op> <expr>
+
+  The left hand side must be a variable, the right hand side can be a
+  variable, number, string or `query`. Operands are ==, !=, <, <=, >, >=.
+  == and != can be used for strings, all can be used for numerical values.
 */
 
 void do_block(enum block_cmd cmd, struct st_command* command)
@@ -5581,11 +5627,16 @@ void do_block(enum block_cmd cmd, struct st_command* command)
   if (!expr_start++)
     die("missing '(' in %s", cmd_name);
 
+  while (my_isspace(charset_info, *expr_start))
+    expr_start++;
+  
   /* Check for !<expr> */
   if (*expr_start == '!')
   {
     not_expr= TRUE;
-    expr_start++; /* Step past the '!' */
+    expr_start++; /* Step past the '!', then any whitespace */
+    while (*expr_start && my_isspace(charset_info, *expr_start))
+      expr_start++;
   }
   /* Find ending ')' */
   expr_end= strrchr(expr_start, ')');
@@ -5599,14 +5650,94 @@ void do_block(enum block_cmd cmd, struct st_command* command)
     die("Missing '{' after %s. Found \"%s\"", cmd_name, p);
 
   var_init(&v,0,0,0,0);
-  eval_expr(&v, expr_start, &expr_end);
 
+  /* If expression starts with a variable, it may be a compare condition */
+
+  if (*expr_start == '$')
+  {
+    const char *curr_ptr= expr_end;
+    eval_expr(&v, expr_start, &curr_ptr, true);
+    while (my_isspace(charset_info, *++curr_ptr))
+    {}
+    /* If there was nothing past the variable, skip condition part */
+    if (curr_ptr == expr_end)
+      goto NO_COMPARE;
+
+    enum block_op operand= find_operand(curr_ptr);
+    if (operand == ILLEG_OP)
+      die("Found junk '%.*s' after $variable in condition",
+          (int)(expr_end - curr_ptr), curr_ptr);
+
+    /* We could silently allow this, but may be confusing */
+    if (not_expr)
+      die("Negation and comparison should not be combined, please rewrite");
+    
+    /* Skip the 1 or 2 chars of the operand, then white space */
+    if (operand == LT_OP || operand == GT_OP)
+    {
+      curr_ptr++;
+    }
+    else
+    {
+      curr_ptr+= 2;
+    }
+    while (my_isspace(charset_info, *curr_ptr))
+      curr_ptr++;
+
+    VAR v2;
+    var_init(&v2,0,0,0,0);
+    eval_expr(&v2, curr_ptr, &expr_end);
+
+    if ((operand!=EQ_OP && operand!=NE_OP) && ! (v.is_int && v2.is_int))
+      die ("Only == and != are supported for string values");
+
+    /* Now we overwrite the first variable with 0 or 1 (for false or true) */
+
+    switch (operand)
+    {
+    case EQ_OP:
+      if (v.is_int)
+        v.int_val= (v2.is_int && v2.int_val == v.int_val);
+      else
+        v.int_val= !strcmp (v.str_val, v2.str_val);
+      break;
+      
+    case NE_OP:
+      if (v.is_int)
+        v.int_val= ! (v2.is_int && v2.int_val == v.int_val);
+      else
+        v.int_val= (strcmp (v.str_val, v2.str_val) != 0);
+      break;
+
+    case LT_OP:
+      v.int_val= (v.int_val < v2.int_val);
+      break;
+    case LE_OP:
+      v.int_val= (v.int_val <= v2.int_val);
+      break;
+    case GT_OP:
+      v.int_val= (v.int_val > v2.int_val);
+      break;
+    case GE_OP:
+      v.int_val= (v.int_val >= v2.int_val);
+      break;
+    }
+
+    v.is_int= TRUE;
+  } else
+  {
+    if (*expr_start != '`' && ! my_isdigit(charset_info, *expr_start))
+      die("Expression in if/while must beging with $, ` or a number");
+    eval_expr(&v, expr_start, &expr_end);
+  }
+
+ NO_COMPARE:
   /* Define inner block */
   cur_block++;
   cur_block->cmd= cmd;
-  if (v.int_val)
+  if (v.is_int)
   {
-    cur_block->ok= TRUE;
+    cur_block->ok= (v.int_val != 0);
   } else
   /* Any non-empty string which does not begin with 0 is also TRUE */
   {

mysql-test/extra/binlog_tests/binlog_truncate.test

@@ -12,13 +12,13 @@ eval CREATE TABLE t1 (a INT) ENGINE=$engine;
 eval CREATE TABLE t2 (a INT) ENGINE=$engine;
 INSERT INTO t2 VALUES (1),(2),(3);
 let $binlog_start = query_get_value("SHOW MASTER STATUS", Position, 1);
-if (`select length('$before_truncate') > 0`) {
+if ($before_truncate) {
   eval $before_truncate;
 }
 --echo **** Truncate of empty table shall be logged
 TRUNCATE TABLE t1;
 
-if (`select length('$before_truncate') > 0`) {
+if ($before_truncate) {
   eval $before_truncate;
 }
 TRUNCATE TABLE t2;
@@ -35,7 +35,7 @@ eval CREATE TABLE t2 (a INT) ENGINE=$engine;
 INSERT INTO t1 VALUES (1),(2);
 
 let $binlog_start = query_get_value("SHOW MASTER STATUS", Position, 1);
-if (`select length('$before_truncate') > 0`) {
+if ($before_truncate) {
   eval $before_truncate;
 }
 

mysql-test/extra/binlog_tests/blackhole.test

@@ -173,7 +173,7 @@ insert into t1 values(2);
 rollback;
 
 let $master_log_pos_2= query_get_value(SHOW MASTER STATUS, Position, 1);
-if (`SELECT $master_log_pos_2 <> $master_log_pos_1`)
+if ($master_log_pos_2 != $master_log_pos_1)
 {
   echo $master_log_pos_1 $master_log_pos_2;
   die Rollbacked transaction has been binlogged;

mysql-test/extra/binlog_tests/mix_innodb_myisam_binlog.test

@@ -319,7 +319,7 @@ if (`select @@binlog_format = 'STATEMENT' || @@binlog_format = 'MIXED'`)
 {
  --let $binlog_rollback= query_get_value(SHOW BINLOG EVENTS, Pos, 7)
  --let $binlog_query= query_get_value(SHOW BINLOG EVENTS, Info, 7)
- if (`SELECT 'ROLLBACK' != '$binlog_query'`) {
+ if ($binlog_query != ROLLBACK) {
   --echo Wrong query from SHOW BINLOG EVENTS. Expected ROLLBACK, got '$binlog_query'
   --source include/show_rpl_debug_info.inc
   --die Wrong value for slave parameter

mysql-test/extra/rpl_tests/create_recursive_construct.inc

@@ -167,7 +167,9 @@
 --let $CRC_create=
 
 ######## func_retval ########
-if (`SELECT $CRC_ARG_type = 0 AND '$CRC_ARG_value' != ''`) {
+# if inside if in lieu of AND operand
+if ($CRC_ARG_type == 0) {
+ if ($CRC_ARG_value) {
   # It will be safe to call this function and discard the return
   # value, but it will be unsafe to use return value (e.g., in
   # INSERT...SELECT).
@@ -180,10 +182,11 @@ if (`SELECT $CRC_ARG_type = 0 AND '$CRC_ARG_value' != ''`) {
   --let $CRC_RET_drop= DROP FUNCTION $CRC_name
   --let $CRC_RET_is_toplevel= 0
   --let $CRC_RET_desc= function $CRC_name returning value from $CRC_ARG_desc
+ }
 }
 
 ######## func_sidef ########
-if (`SELECT $CRC_ARG_type = 1`) {
+if ($CRC_ARG_type == 1) {
   # It will be unsafe to call func even if you discard return value.
   --let $CRC_name= func_sidef_$CRC_ARG_level
   --let $CRC_create= CREATE FUNCTION $CRC_name() RETURNS VARCHAR(100) BEGIN INSERT INTO ta$CRC_ARG_level VALUES (47); $CRC_ARG_stmt_sidef; RETURN 0; END
@@ -197,7 +200,7 @@ if (`SELECT $CRC_ARG_type = 1`) {
 }
 
 ######## proc ########
-if (`SELECT $CRC_ARG_type = 2`) {
+if ($CRC_ARG_type == 2) {
   # It will be unsafe to call this procedure.
   --let $CRC_name= proc_$CRC_ARG_level
   --let $CRC_create= CREATE PROCEDURE $CRC_name() BEGIN $CRC_ARG_stmt_sidef; INSERT INTO ta$CRC_ARG_level VALUES (47); END
@@ -211,7 +214,7 @@ if (`SELECT $CRC_ARG_type = 2`) {
 }
 
 ######## trig ########
-if (`SELECT $CRC_ARG_type = 3`) {
+if ($CRC_ARG_type == 3) {
   # It will be unsafe to invoke this trigger.
   --let $CRC_name= trig_$CRC_ARG_level
   --let $CRC_create= CREATE TRIGGER $CRC_name BEFORE INSERT ON trigger_table_$CRC_ARG_level FOR EACH ROW BEGIN INSERT INTO ta$CRC_ARG_level VALUES (47); $CRC_ARG_stmt_sidef; END
@@ -225,7 +228,8 @@ if (`SELECT $CRC_ARG_type = 3`) {
 }
 
 ######## view_retval ########
-if (`SELECT $CRC_ARG_type = 4 AND '$CRC_ARG_sel_retval' != ''`) {
+if ($CRC_ARG_type == 4) {
+ if ($CRC_ARG_sel_retval) {
   # It will be safe to select from this view if you discard the result
   # set, but unsafe to use result set (e.g., in INSERT..SELECT).
   --let $CRC_name= view_retval_$CRC_ARG_level
@@ -237,10 +241,12 @@ if (`SELECT $CRC_ARG_type = 4 AND '$CRC_ARG_sel_retval' != ''`) {
   --let $CRC_RET_drop= DROP VIEW $CRC_name
   --let $CRC_RET_is_toplevel= 0
   --let $CRC_RET_desc= view $CRC_name returning value from $CRC_ARG_desc
+ }
 }
 
 ######## view_sidef ########
-if (`SELECT $CRC_ARG_type = 5 AND '$CRC_ARG_sel_sidef' != ''`) {
+if ($CRC_ARG_type == 5) {
+ if  ($CRC_ARG_sel_sidef) {
   # It will be unsafe to select from this view, even if you discard
   # the return value.
   --let $CRC_name= view_sidef_$CRC_ARG_level
@@ -252,10 +258,11 @@ if (`SELECT $CRC_ARG_type = 5 AND '$CRC_ARG_sel_sidef' != ''`) {
   --let $CRC_RET_drop= DROP VIEW $CRC_name
   --let $CRC_RET_is_toplevel= 0
   --let $CRC_RET_desc= view $CRC_name invoking $CRC_ARG_desc
+ }
 }
 
 ######## prep ########
-if (`SELECT $CRC_ARG_type = 6`) {
+if ($CRC_ARG_type == 6) {
   # It will be unsafe to execute this prepared statement
   --let $CRC_name= prep_$CRC_ARG_level
   --let $CRC_create= PREPARE $CRC_name FROM "$CRC_ARG_stmt_sidef"
@@ -269,7 +276,7 @@ if (`SELECT $CRC_ARG_type = 6`) {
 }
 
 ######## no recursive construct: just return the given statement ########
-if (`SELECT $CRC_ARG_type = 7`) {
+if ($CRC_ARG_type == 7) {
   # CRC_ARG_type=7 is a special case. We just set $CRC_RET_x =
   # $CRC_ARG_x.  This way, the $CRC_ARG_stmt gets executed directly
   # (below).  In binlog_unsafe.test, it is used to invoke the unsafe
@@ -295,7 +302,7 @@ if ($CRC_RET_stmt_sidef) {
   --echo * binlog_format = STATEMENT: expect $CRC_ARG_expected_number_of_warnings warnings.
   --eval $CRC_RET_stmt_sidef
   --let $n_warnings= `SHOW COUNT(*) WARNINGS`
-  if (`SELECT '$n_warnings' != '$CRC_ARG_expected_number_of_warnings'`) {
+  if ($n_warnings != $CRC_ARG_expected_number_of_warnings) {
     --echo ******** Failure! Expected $CRC_ARG_expected_number_of_warnings warnings, got $n_warnings warnings. ********
     SHOW WARNINGS;
     SHOW BINLOG EVENTS;
@@ -312,14 +319,14 @@ if ($CRC_RET_stmt_sidef) {
   RESET MASTER;
   --eval $CRC_RET_stmt_sidef
   --let $n_warnings= `SHOW COUNT(*) WARNINGS`
-  if (`SELECT '$n_warnings' != '0'`) {
+  if ($n_warnings) {
     --echo ******** Failure! Expected 0 warnings, got $n_warnings warnings. ********
     SHOW WARNINGS;
     SHOW BINLOG EVENTS;
     --die Wrong number of warnings.
   }
   --let $binlog_event= query_get_value(SHOW BINLOG EVENTS, Event_type, 2)
-  if (`SELECT '$binlog_event' != 'No such row'`) {
+  if ($binlog_event != No such row) {
     --enable_query_log
     --echo ******** Failure! Something was written to the binlog despite SQL_LOG_BIN=0 ********
     SHOW BINLOG EVENTS;
@@ -332,7 +339,7 @@ if ($CRC_RET_stmt_sidef) {
   RESET MASTER;
   --eval $CRC_RET_stmt_sidef
   --let $n_warnings= `SHOW COUNT(*) WARNINGS`
-  if (`SELECT '$n_warnings' != '0'`) {
+  if ($n_warnings) {
     --echo ******** Failure! Expected 0 warnings, got $n_warnings warnings. ********
     SHOW WARNINGS;
     SHOW BINLOG EVENTS;
@@ -375,7 +382,7 @@ if ($CRC_RET_sel_retval) {
   # fail.  When the bug is fixed, we should execute the following.
 
   #--let $n_warnings= `SHOW COUNT(*) WARNINGS`
-  #if (`SELECT '$n_warnings' != '0'`) {
+  #if ($n_warnings) {
   #  --enable_query_log
   #  --echo Failure! Expected 0 warnings, got $n_warnings warnings.
   #  SHOW WARNINGS;

mysql-test/extra/rpl_tests/rpl_drop_create_temp_table.inc

@@ -35,7 +35,7 @@ if (`SELECT HEX(@commands) = HEX('configure')`)
   # when a command ends.
   #
   --let $n= $tot_table
-  while (`SELECT $n != 0`)
+  while ($n)
   { 
     --eval DROP TEMPORARY TABLE IF EXISTS nt_tmp_$n
     --eval CREATE TEMPORARY TABLE nt_tmp_$n ( id INT ) ENGINE = MyIsam
@@ -62,7 +62,7 @@ if (`SELECT HEX(@commands) = HEX('configure')`)
   # when a command ends.
   #
   --let $n= $tot_table
-  while (`SELECT $n != 0`)
+  while ($n)
   { 
     --eval DROP TEMPORARY TABLE IF EXISTS tt_tmp_$n
     --eval CREATE TEMPORARY TABLE tt_tmp_$n ( id INT ) ENGINE = Innodb
@@ -89,7 +89,7 @@ if (`SELECT HEX(@commands) = HEX('configure')`)
   # when a command ends.
   #
   --let $n= $tot_table
-  while (`SELECT $n != 0`)
+  while ($n)
   { 
     --eval DROP TABLE IF EXISTS nt_$n
     --eval CREATE TABLE nt_$n ( id INT ) ENGINE = MyIsam
@@ -116,7 +116,7 @@ if (`SELECT HEX(@commands) = HEX('configure')`)
   # when a command ends.
   #
   --let $n= $tot_table
-  while (`SELECT $n != 0`)
+  while ($n)
   { 
     --eval DROP TABLE IF EXISTS tt_$n
     --eval CREATE TABLE tt_$n ( id INT ) ENGINE = Innodb
@@ -163,14 +163,14 @@ if (`SELECT HEX(@commands) = HEX('clean')`)
   DROP TABLE IF EXISTS nt_xx_1;
 
   --let $n= $tot_table
-  while (`SELECT $n != 0`)
+  while ($n)
   { 
     --eval DROP TABLE IF EXISTS nt_$n
     --dec $n
   }
 
   --let $n= $tot_table
-  while (`SELECT $n != 0`)
+  while ($n)
   { 
     --eval DROP TABLE IF EXISTS tt_$n
     --dec $n
@@ -634,11 +634,11 @@ while (`SELECT HEX(@commands) != HEX('')`)
         {
           --let $dropped_temp= $table
         }
-        if (`SELECT $n = 1`)
+        if ($n == 1)
         {
           --let $table_1= $table
         }
-        if (`SELECT $n = 2`)
+        if ($n == 2)
         {
           --let $table_2= $table
         }
@@ -886,7 +886,7 @@ while (`SELECT HEX(@commands) != HEX('')`)
     --let $available_n_temp=
     --let $dropped_n_temp=
     --let $n= $tot_table
-    while (`SELECT $n != 0`)
+    while ($n)
     { 
       --eval DROP TEMPORARY TABLE IF EXISTS nt_tmp_$n
       --eval CREATE TEMPORARY TABLE nt_tmp_$n ( id INT ) ENGINE = MyIsam
@@ -905,7 +905,7 @@ while (`SELECT HEX(@commands) != HEX('')`)
     --let $available_t_temp=
     --let $dropped_t_temp=
     --let $n= $tot_table
-    while (`SELECT $n != 0`)
+    while ($n)
     { 
       --eval DROP TEMPORARY TABLE IF EXISTS tt_tmp_$n
       --eval CREATE TEMPORARY TABLE tt_tmp_$n ( id INT ) ENGINE = Innodb
@@ -924,7 +924,7 @@ while (`SELECT HEX(@commands) != HEX('')`)
     --let $available_t=
     --let $dropped_t=
     --let $n= $tot_table
-    while (`SELECT $n != 0`)
+    while ($n)
     { 
       --eval DROP TABLE IF EXISTS tt_$n
       --eval CREATE TABLE tt_$n ( id INT ) ENGINE = Innodb
@@ -943,7 +943,7 @@ while (`SELECT HEX(@commands) != HEX('')`)
     --let $available_n=
     --let $dropped_n=
     --let $n= $tot_table
-    while (`SELECT $n != 0`)
+    while ($n)
     { 
       --eval DROP TABLE IF EXISTS nt_$n
       --eval CREATE TABLE nt_$n ( id INT ) ENGINE = MyIsam

mysql-test/extra/rpl_tests/rpl_extraSlave_Col.test

@@ -406,7 +406,7 @@ sync_slave_with_master;
 # Error reaction is up to sql_mode of the slave sql (bug#38173)
 #--echo *** Create t9 on slave  ***
 # Please, check BUG#47741 to see why you are not testing NDB.
-if (`SELECT $engine_type != 'NDB'`)
+if ($engine_type != NDB)
 {
   STOP SLAVE;
   RESET SLAVE;

mysql-test/extra/rpl_tests/rpl_implicit_commit_binlog.test

@@ -33,7 +33,7 @@ INSERT INTO tt_2(ddl_case) VALUES(0);
 --echo #########################################################################
 SET AUTOCOMMIT= 0;
 let $ddl_cases= 41;
-while (`SELECT $ddl_cases >= 1`)
+while ($ddl_cases >= 1)
 {
   --echo -b-b-b-b-b-b-b-b-b-b-b- >> << -b-b-b-b-b-b-b-b-b-b-b-
   let $in_temporary= "no";
@@ -76,7 +76,7 @@ while (`SELECT $ddl_cases >= 1`)
   # 6: ROW EVENT
   # 7: COMMIT
   #
-  if (`select '$engine' = 'NDB'`)
+  if ($engine == NDB)
   {
     let $commit_event_row_number= 7;
   }
@@ -84,10 +84,10 @@ while (`SELECT $ddl_cases >= 1`)
   let $first_binlog_position= query_get_value("SHOW MASTER STATUS", Position, 1);
   --enable_query_log
   eval INSERT INTO tt_1(ddl_case) VALUES ($ddl_cases);
-  if (`SELECT $ddl_cases = 41`)
+  if ($ddl_cases == 41)
   {
     let $cmd= LOAD INDEX INTO CACHE nt_1 IGNORE LEAVES;
-    if (`SELECT '$engine' = 'NDB'`)
+    if ($engine == NDB)
     {
       # This seems to be related to epochs.
       # We need to check this against an updated version or avoid it.
@@ -95,7 +95,7 @@ while (`SELECT $ddl_cases >= 1`)
       let $commit_event_row_number= 6;
     }
   }
-  if (`SELECT $ddl_cases = 40`)
+  if ($ddl_cases == 40)
   {
     let $cmd= LOAD INDEX INTO CACHE tt_1, tt_2 IGNORE LEAVES;
     #
@@ -109,16 +109,16 @@ while (`SELECT $ddl_cases >= 1`)
     # 5: ROW EVENT
     # 6: COMMIT
     #
-    if (`SELECT '$engine' = 'NDB'`)
+    if ($engine == NDB)
     {
       let $commit_event_row_number= 6;
     }
   }
-  if (`SELECT $ddl_cases = 39`)
+  if ($ddl_cases == 39)
   {
     let $cmd= ANALYZE TABLE nt_1;
   }
-  if (`SELECT $ddl_cases = 38`)
+  if ($ddl_cases == 38)
   {
     let $cmd= CHECK TABLE nt_1;
     #
@@ -132,20 +132,20 @@ while (`SELECT $ddl_cases >= 1`)
     # 5: ROW EVENT
     # 6: COMMIT
     #
-    if (`SELECT '$engine' = 'NDB'`)
+    if ($engine == NDB)
     {
       let $commit_event_row_number= 6;
     }
   }
-  if (`SELECT $ddl_cases = 37`)
+  if ($ddl_cases == 37)
   {
     let $cmd= OPTIMIZE TABLE nt_1;
   }
-  if (`SELECT $ddl_cases = 36`)
+  if ($ddl_cases == 36)
   {
     let $cmd= REPAIR TABLE nt_1;
   }
-  if (`SELECT $ddl_cases = 35`)
+  if ($ddl_cases == 35)
   {
     let $cmd= LOCK TABLES tt_1 WRITE;
     #
@@ -159,12 +159,12 @@ while (`SELECT $ddl_cases >= 1`)
     # 5: ROW EVENT
     # 6: COMMIT
     #
-    if (`SELECT '$engine' = 'NDB'`)
+    if ($engine == NDB)
     {
       let $commit_event_row_number= 6;
     }
   }
-  if (`SELECT $ddl_cases = 34`)
+  if ($ddl_cases == 34)
   {
     let $cmd= UNLOCK TABLES;
     #
@@ -178,20 +178,20 @@ while (`SELECT $ddl_cases >= 1`)
     # 5: ROW EVENT
     # 6: COMMIT
     #
-    if (`SELECT '$engine' = 'NDB'`)
+    if ($engine == NDB)
     {
       let $commit_event_row_number= 6;
     }
   }
-  if (`SELECT $ddl_cases = 33`)
+  if ($ddl_cases == 33)
   {
     let $cmd= CREATE USER 'user'@'localhost';
   }
-  if (`SELECT $ddl_cases = 32`)
+  if ($ddl_cases == 32)
   {
     let $cmd= GRANT ALL ON *.* TO 'user'@'localhost';
   }
-  if (`SELECT $ddl_cases = 31`)
+  if ($ddl_cases == 31)
   {
     let $cmd= SET PASSWORD FOR 'user'@'localhost' = PASSWORD('newpass');
     #
@@ -231,35 +231,35 @@ while (`SELECT $ddl_cases >= 1`)
       let $commit_event_row_number= 7;
     }
   }
-  if (`SELECT $ddl_cases = 30`)
+  if ($ddl_cases == 30)
   {
     let $cmd= REVOKE ALL PRIVILEGES, GRANT OPTION FROM 'user'@'localhost';
   }
-  if (`SELECT $ddl_cases = 29`)
+  if ($ddl_cases == 29)
   {
     let $cmd= RENAME USER 'user'@'localhost' TO 'user_new'@'localhost';
   }
-  if (`SELECT $ddl_cases = 28`)
+  if ($ddl_cases == 28)
   {
     let $cmd= DROP USER 'user_new'@'localhost';
   }
-  if (`SELECT $ddl_cases = 27`)
+  if ($ddl_cases == 27)
   {
     let $cmd= CREATE EVENT evt ON SCHEDULE AT CURRENT_TIMESTAMP + INTERVAL 1 HOUR DO SELECT * FROM tt_1;
   }
-  if (`SELECT $ddl_cases = 26`)
+  if ($ddl_cases == 26)
   {
     let $cmd= ALTER EVENT evt COMMENT 'evt';
   }
-  if (`SELECT $ddl_cases = 25`)
+  if ($ddl_cases == 25)
   {
     let $cmd= DROP EVENT evt;
   }
-  if (`SELECT $ddl_cases = 24`)
+  if ($ddl_cases == 24)
   {
     let $cmd= CREATE TRIGGER tr AFTER INSERT ON tt_1 FOR EACH ROW UPDATE tt_2 SET ddl_case = ddl_case WHERE ddl_case= NEW.ddl_case;
   }
-  if (`SELECT $ddl_cases = 23`)
+  if ($ddl_cases == 23)
   {
     let $cmd= DROP TRIGGER tr;
     #
@@ -277,43 +277,43 @@ while (`SELECT $ddl_cases >= 1`)
       let $commit_event_row_number= 5;
     }
   }
-  if (`SELECT $ddl_cases = 22`)
+  if ($ddl_cases == 22)
   {
     let $cmd= CREATE FUNCTION fc () RETURNS VARCHAR(64) RETURN "fc";
   }
-  if (`SELECT $ddl_cases = 21`)
+  if ($ddl_cases == 21)
   {
     let $cmd= ALTER FUNCTION fc COMMENT 'fc';
   }
-  if (`SELECT $ddl_cases = 20`)
+  if ($ddl_cases == 20)
   {
     let $cmd= DROP FUNCTION fc;
   }
-  if (`SELECT $ddl_cases = 19`)
+  if ($ddl_cases == 19)
   {
     let $cmd= CREATE PROCEDURE pc () UPDATE tt_2 SET ddl_case = ddl_case WHERE ddl_case= NEW.ddl_case;
   }
-  if (`SELECT $ddl_cases = 18`)
+  if ($ddl_cases == 18)
   {
     let $cmd= ALTER PROCEDURE pc COMMENT 'pc';
   }
-  if (`SELECT $ddl_cases = 17`)
+  if ($ddl_cases == 17)
   {
     let $cmd= DROP PROCEDURE pc;
   }
-  if (`SELECT $ddl_cases = 16`)
+  if ($ddl_cases == 16)
   {
     let $cmd= CREATE VIEW v AS SELECT * FROM tt_1;
   }
-  if (`SELECT $ddl_cases = 15`)
+  if ($ddl_cases == 15)
   {
     let $cmd= ALTER VIEW v AS SELECT * FROM tt_1;
   }
-  if (`SELECT $ddl_cases = 14`)
+  if ($ddl_cases == 14)
   {
     let $cmd= DROP VIEW v;
   }
-  if (`SELECT $ddl_cases = 13`)
+  if ($ddl_cases == 13)
   {
     let $cmd= CREATE INDEX ix ON tt_1(ddl_case);
     #
@@ -328,12 +328,12 @@ while (`SELECT $ddl_cases >= 1`)
     # 6: COMMIT
     # 7: DDL EVENT which triggered the previous commmit.
     #
-    if (`SELECT '$engine' = 'NDB'`)
+    if ($engine == NDB)
     {
       let $commit_event_row_number= 6;
     }
   }
-  if (`SELECT $ddl_cases = 12`)
+  if ($ddl_cases == 12)
   {
     let $cmd= DROP INDEX ix ON tt_1;
     #
@@ -348,12 +348,12 @@ while (`SELECT $ddl_cases >= 1`)
     # 6: COMMIT
     # 7: DDL EVENT which triggered the previous commmit.
     #
-    if (`SELECT '$engine' = 'NDB'`)
+    if ($engine == NDB)
     {
       let $commit_event_row_number= 6;
     }
   }
-  if (`SELECT $ddl_cases = 11`)
+  if ($ddl_cases == 11)
   {
     let $cmd= CREATE TEMPORARY TABLE tt_xx (a int);
     let $in_temporary= "yes";
@@ -411,7 +411,7 @@ while (`SELECT $ddl_cases >= 1`)
       let $commit_event_row_number= 9;
     }
   }
-  if (`SELECT $ddl_cases = 10`)
+  if ($ddl_cases == 10)
   {
     let $cmd= ALTER TABLE tt_xx ADD COLUMN (b int);
     #
@@ -438,12 +438,12 @@ while (`SELECT $ddl_cases >= 1`)
     # 5: ROW EVENT
     # 6: COMMIT
     #
-    if (`SELECT '$engine' = 'NDB'`)
+    if ($engine == NDB)
     {
       let $commit_event_row_number= 6;
     }
   }
-  if (`SELECT $ddl_cases = 9`)
+  if ($ddl_cases == 9)
   {
     let $cmd= ALTER TABLE tt_xx RENAME new_tt_xx;
     #
@@ -470,12 +470,12 @@ while (`SELECT $ddl_cases >= 1`)
     # 5: ROW EVENT
     # 6: COMMIT
     #
-    if (`SELECT '$engine' = 'NDB'`)
+    if ($engine == NDB)
     {
       let $commit_event_row_number= 6;
     }
   }
-  if (`SELECT $ddl_cases = 8`)
+  if ($ddl_cases == 8)
   {
     let $cmd= DROP TEMPORARY TABLE IF EXISTS new_tt_xx;
     let $in_temporary= "yes";
@@ -528,7 +528,7 @@ while (`SELECT $ddl_cases >= 1`)
     # 8: ROW EVENT
     # 9: COMMIT
     #
-    if (`SELECT '$engine' = 'NDB'`)
+    if ($engine == NDB)
     {
       let $commit_event_row_number= 9;
     }
@@ -551,27 +551,27 @@ while (`SELECT $ddl_cases >= 1`)
       let $commit_event_row_number= 9;
     }
   }
-  if (`SELECT $ddl_cases = 7`)
+  if ($ddl_cases == 7)
   {
     let $cmd= CREATE TABLE tt_xx (a int);
   }
-  if (`SELECT $ddl_cases = 6`)
+  if ($ddl_cases == 6)
   {
     let $cmd= ALTER TABLE tt_xx ADD COLUMN (b int);
   }
-  if (`SELECT $ddl_cases = 5`)
+  if ($ddl_cases == 5)
   {
     let $cmd= RENAME TABLE tt_xx TO new_tt_xx;
   }
-  if (`SELECT $ddl_cases = 4`)
+  if ($ddl_cases == 4)
   {
     let $cmd= TRUNCATE TABLE new_tt_xx;
   }
-  if (`SELECT $ddl_cases = 3`)
+  if ($ddl_cases == 3)
   {
     let $cmd= DROP TABLE IF EXISTS tt_xx, new_tt_xx;
   }
-  if (`SELECT $ddl_cases = 2`)
+  if ($ddl_cases == 2)
   {
     let $cmd= CREATE DATABASE db;
     #
@@ -586,12 +586,12 @@ while (`SELECT $ddl_cases >= 1`)
     # 6: COMMIT
     # 7: DDL EVENT which triggered the previous commmit.
     #
-    if (`SELECT '$engine' = 'NDB'`)
+    if ($engine == NDB)
     {
       let $commit_event_row_number= 6;
     }
   }
-  if (`SELECT $ddl_cases = 1`)
+  if ($ddl_cases == 1)
   {
     let $cmd= DROP DATABASE IF EXISTS db;
     #
@@ -606,7 +606,7 @@ while (`SELECT $ddl_cases >= 1`)
     # 6: COMMIT
     # 7: DDL EVENT which triggered the previous commmit.
     #
-    if (`SELECT '$engine' = 'NDB'`)
+    if ($engine == NDB)
     {
       let $commit_event_row_number= 6;
     }
@@ -618,14 +618,14 @@ while (`SELECT $ddl_cases >= 1`)
   # commit. The flag in_temporary is used to avoid aborting the test in such
   # cases. Thus we force the commit.
   #
-  if (`SELECT $in_temporary = "yes"`)
+  if ($in_temporary == "yes")
   {
     --eval COMMIT
   }
   let $event_commit= query_get_value("SHOW BINLOG EVENTS FROM $first_binlog_position", Info, $commit_event_row_number);
   if (`SELECT SUBSTRING("$event_commit",1,6) != "COMMIT"`)
   {
-    if (`SELECT $ok = "yes"`)
+    if ($ok == "yes")
     {
       --echo it *does not* commit the current transaction.
       --echo $cmd

mysql-test/extra/rpl_tests/rpl_insert_delayed.test

@@ -121,7 +121,7 @@ if  (`SELECT @@global.binlog_format = 'STATEMENT'`)
 
 # The second INSERT DELAYED statement is the 5 item if two INSERT DELAYED are
 # handled separately
-  if (`SELECT '$stmt' = 'COMMIT'`)
+  if ($stmt == COMMIT)
   {
     --let $stmt= query_get_value(SHOW BINLOG EVENTS IN '$binlog_file' FROM $_start, Info, 5)
   }

mysql-test/extra/rpl_tests/rpl_not_null.test

@@ -177,7 +177,7 @@ sync_slave_with_master;
 #--source include/wait_for_slave_to_start.inc
 #
 #let $y=0;
-#while (`select $y < 6`)
+#while ($y < 6)
 #{
 #  connection master;
 #
@@ -202,21 +202,21 @@ sync_slave_with_master;
 #  `c` INT DEFAULT 500, 
 #  PRIMARY KEY(`a`)) ENGINE=$engine DEFAULT CHARSET=LATIN1;
 #  
-#  if (`select $y=0`)
+#  if ($y==0)
 #  {
 #    --echo ************* EXECUTION WITH INSERTS *************
 #    connection master;
 #    INSERT INTO t1(a) VALUES (1);
 #  }
 #  
-#  if (`select $y=1`)
+#  if ($y==1)
 #  {
 #    --echo ************* EXECUTION WITH INSERTS *************
 #    connection master;
 #    INSERT INTO t1(a, b) VALUES (1, NULL);
 #  }
 #  
-#  if (`select $y=2`)
+#  if ($y==2)
 #  {
 #    --echo ************* EXECUTION WITH UPDATES *************
 #    connection master;
@@ -225,14 +225,14 @@ sync_slave_with_master;
 #    UPDATE t3 SET b = NULL where a= 1;
 #  }
 #  
-#  if (`select $y=3`)
+#  if ($y==3)
 #  {
 #    --echo ************* EXECUTION WITH INSERTS/REPLACES *************
 #    connection master;
 #    REPLACE INTO t3(a, b) VALUES (1, null);
 #  }
 #   
-#  if (`select $y=4`)
+#  if ($y==4)
 #  {
 #    --echo ************* EXECUTION WITH UPDATES/REPLACES *************
 #    connection master;
@@ -240,7 +240,7 @@ sync_slave_with_master;
 #    REPLACE INTO t3(a, b) VALUES (1, null);
 #  }
 #   
-#  if (`select $y=5`)
+#  if ($y==5)
 #  {
 #    --echo ************* EXECUTION WITH MULTI-ROW INSERTS *************
 #    connection master;

mysql-test/include/check_slave_is_running.inc

@@ -8,10 +8,18 @@
 
 --echo Checking that both slave threads are running.
 
+--let $running= 1
 --let $slave_sql_running = query_get_value(SHOW SLAVE STATUS, Slave_SQL_Running, 1)
 --let $slave_io_running = query_get_value(SHOW SLAVE STATUS, Slave_IO_Running, 1)
 
-if (`SELECT '$slave_sql_running' != 'Yes' OR '$slave_io_running' != 'Yes'`) {
+if ($slave_sql_running != Yes) {
+  --let $running= 0
+}
+if ($slave_io_running != Yes) {
+  --let $running= 0
+}
+
+if (!$running) {
   --echo Slave not running: Slave_SQL_Running = $slave_sql_running Slave_IO_Running = $slave_io_running
   --source include/show_rpl_debug_info.inc
   --die Expected slave to be running, but it was not running.

mysql-test/include/check_slave_param.inc

@@ -9,7 +9,7 @@
 # --source include/check_slave_param.inc
 
 --let $_param_value= query_get_value(SHOW SLAVE STATUS, $slave_param, 1)
-if (`SELECT '$_param_value' != '$slave_param_value'`) {
+if ($_param_value != $slave_param_value) {
   --echo Wrong value for $slave_param. Expected '$slave_param_value', got '$_param_value'
   --source include/show_rpl_debug_info.inc
   --die Wrong value for slave parameter

mysql-test/include/diff_tables.inc

@@ -69,7 +69,7 @@ while ($_diff_i) {
 # and connect the appropriate server.
   let $_pos= `SELECT LOCATE(':', '$_diff_table')`;
   let $_diff_conn=`SELECT SUBSTR('$_diff_table', 1, $_pos-1)`;
-  if (`SELECT 'XX$_diff_conn' <> 'XX'`) {
+  if ($_diff_conn) {
     let $_diff_table=`SELECT SUBSTR('$_diff_table', $_pos+1)`;
     connection $_diff_conn;
   }

mysql-test/include/have_example_plugin.inc

@@ -8,7 +8,7 @@ if (`SELECT @@have_dynamic_loading != 'YES'`) {
 #
 # Check if the variable EXAMPLE_PLUGIN is set
 #
-if (`SELECT LENGTH('$EXAMPLE_PLUGIN') = 0`) {
+if (!$EXAMPLE_PLUGIN) {
   --skip Example plugin requires the environment variable \$EXAMPLE_PLUGIN to be set (normally done by mtr)
 }
 

mysql-test/include/have_semisync_plugin.inc

@@ -8,7 +8,7 @@ if (`SELECT @@have_dynamic_loading != 'YES'`) {
 #
 # Check if the variable SEMISYNC_MASTER_PLUGIN is set
 #
-if (`select LENGTH('$SEMISYNC_MASTER_PLUGIN') = 0`)
+if (!$SEMISYNC_MASTER_PLUGIN)
 {
   skip Need semisync plugins;
 }

mysql-test/include/have_simple_parser.inc

@@ -8,7 +8,7 @@ if (`SELECT @@have_dynamic_loading != 'YES'`) {
 #
 # Check if the variable SIMPLE_PARSER is set
 #
-if (`SELECT LENGTH('$SIMPLE_PARSER') = 0`) {
+if (!$SIMPLE_PARSER) {
   --skip simple parser requires the environment variable \$SIMPLE_PARSER to be set (normally done by mtr)
 }
 

mysql-test/include/have_udf.inc

@@ -8,7 +8,7 @@ if (`SELECT @@have_dynamic_loading != 'YES'`) {
 #
 # Check if the variable UDF_EXAMPLE_LIB is set
 #
-if (`SELECT LENGTH('$UDF_EXAMPLE_LIB') = 0`) {
+if (!$UDF_EXAMPLE_LIB) {
   --skip UDF requires the environment variable \$UDF_EXAMPLE_LIB to be set (normally done by mtr)
 }
 

mysql-test/include/mysql_upgrade_preparation.inc

@@ -17,7 +17,7 @@ select LENGTH("$MYSQL_UPGRADE")>0 as have_mysql_upgrade;
 # Therefore, truncate the log table in advance and issue a statement
 # that should be logged.
 #
-if (`SELECT $VALGRIND_TEST`)
+if ($VALGRIND_TEST)
 {
   --disable_query_log
   --disable_result_log

mysql-test/include/no_valgrind_without_big.inc

@@ -5,8 +5,9 @@
 # Therefore we require that the option "--big-test" is also set.
 #
 
-if (`SELECT $VALGRIND_TEST <> 0 AND '$BIG_TEST' = ''`)
-{
-   --skip Need "--big-test" when running with Valgrind
+if ($VALGRIND_TEST) {
+  if (!$BIG_TEST)
+  {
+    --skip Need "--big-test" when running with Valgrind
+  }
 }
-

mysql-test/include/not_parallel.inc

-if (`SELECT '$MTR_PARALLEL' > 1`) {
+if ($MTR_PARALLEL > 1) {
   --skip test requires --parallel=1
 }

mysql-test/include/rpl_diff_tables.inc

@@ -8,13 +8,13 @@
 # --source include/rpl_diff_tables.inc
 # #############################################################################
 
-if (`SELECT "XX$diff_table" = "XX"`)
+if (!$diff_table)
 {
   --die diff_table is null.
 }
 
 --let $_servers= master, slave
-if (`SELECT "XX$diff_server_list" <> "XX"`)
+if ($diff_server_list)
 {
   --let $_servers= $diff_server_list
 }
@@ -22,7 +22,7 @@ if (`SELECT "XX$diff_server_list" <> "XX"`)
 --let $_master= `SELECT SUBSTRING_INDEX('$_servers', ',', 1)`
 --let $_servers= `SELECT LTRIM(SUBSTRING('$_servers', LENGTH('$_master') + 2))`
 connection $_master;
-while (`SELECT "XX$_servers" <> "XX"`)
+while ($_servers)
 {
   --let $_slave= `SELECT SUBSTRING_INDEX('$_servers', ',', 1)`
   --let $_servers= `SELECT LTRIM(SUBSTRING('$_servers', LENGTH('$_slave') + 2))`

mysql-test/include/setup_fake_relay_log.inc

@@ -40,9 +40,16 @@ let $_fake_relay_log_printable= `SELECT REPLACE('$fake_relay_log', '$MYSQL_TEST_
 --echo Setting up fake replication from $_fake_relay_log_printable
 
 # Sanity check.
+let $running= 0;
 let $_sql_running= query_get_value(SHOW SLAVE STATUS, Slave_SQL_Running, 1);
 let $_io_running= query_get_value(SHOW SLAVE STATUS, Slave_IO_Running, 1);
-if (`SELECT "$_sql_running" = "Yes" OR "$_io_running" = "Yes"`) {
+if ($_sql_running == Yes) {
+  let $running= 1;
+}
+if ($_io_running == Yes) {
+  let $running= 1;
+}
+if ($running) {
   --echo Error: Slave was running when test case sourced
   --echo include/setup_fake_replication.inc
   --echo Slave_IO_Running = $_io_running; Slave_SQL_Running = $_sql_running

mysql-test/include/show_rpl_debug_info.inc

@@ -50,7 +50,7 @@ eval SHOW BINLOG EVENTS IN '$binlog_name';
 let $_master_con= $master_connection;
 if (!$_master_con)
 {
-  if (`SELECT '$_con' = 'slave'`)
+  if ($_con == slave)
   {
     let $_master_con= master;
   }
@@ -80,7 +80,7 @@ if ($_master_con)
   --echo
   --echo **** SHOW BINLOG EVENTS on $_master_con ****
   eval SHOW BINLOG EVENTS IN '$master_binlog_name_sql';
-  if (`SELECT '$master_binlog_name_io' != '$master_binlog_name_sql'`)
+  if ($master_binlog_name_io != $master_binlog_name_sql)
   {
     eval SHOW BINLOG EVENTS IN '$master_binlog_name_io';
   }

mysql-test/include/truncate_file.inc

 # truncate a giving file, all contents of the file are be cleared
 
-if (`SELECT 'x$file' = 'x'`)
+if (!$file)
 {
   --echo Please assign a file name to $file!!
   exit;

mysql-test/include/wait_for_slave_io_to_stop.inc

@@ -14,7 +14,7 @@
 # if server has not used CHANGE MASTER to initiate slave, SHOW SLAVE
 # STATUS will return an empty set.
 let $_slave_io_running= query_get_value("SHOW SLAVE STATUS", Slave_IO_Running, 1);
-if (`SELECT '$_slave_io_running' != 'No such row'`)
+if ($_slave_io_running != No such row)
 {
   let $slave_param= Slave_IO_Running;
   let $slave_param_value= No;

mysql-test/include/wait_for_slave_sql_error.inc

@@ -34,7 +34,7 @@ let $slave_error_message= Failed while waiting for slave to stop the SQL thread
 source include/wait_for_slave_param.inc;
 
 let $_error= query_get_value(SHOW SLAVE STATUS, Last_SQL_Errno, 1);
-if (`SELECT '$_error' != '$slave_sql_errno'`) {
+if ($_error != $slave_sql_errno) {
   --echo **** Slave stopped with wrong error code: $_error (expected $slave_sql_errno) ****
   source include/show_rpl_debug_info.inc;
   --echo **** Slave stopped with wrong error code: $_error (expected $slave_sql_errno) ****

mysql-test/include/wait_for_slave_sql_to_stop.inc

@@ -14,7 +14,7 @@
 # if server has not used CHANGE MASTER to initiate slave, SHOW SLAVE
 # STATUS will return an empty set.
 let $_slave_io_running= query_get_value("SHOW SLAVE STATUS", Slave_IO_Running, 1);
-if (`SELECT '$_slave_io_running' != 'No such row'`)
+if ($_slave_io_running != No such row)
 {
   let $slave_param= Slave_SQL_Running;
   let $slave_param_value= No;

mysql-test/include/wait_for_slave_to_stop.inc

@@ -14,7 +14,7 @@
 # if server has not used CHANGE MASTER to initiate slave, SHOW SLAVE
 # STATUS will return an empty set.
 let $_slave_io_running= query_get_value("SHOW SLAVE STATUS", Slave_IO_Running, 1);
-if (`SELECT '$_slave_io_running' != 'No such row'`)
+if ($_slave_io_running != No such row)
 {
   let $slave_error_message= Failed while waiting for slave to stop;
 

mysql-test/include/wait_show_condition.inc

@@ -50,7 +50,7 @@ inc $max_run_time;
 let $found= 0;
 let $max_end_time= `SELECT UNIX_TIMESTAMP() + $max_run_time`;
 
-if (`SELECT '$wait_for_all' != '1'`)
+if ($wait_for_all != 1)
 {
   while (`SELECT UNIX_TIMESTAMP() <= $max_end_time AND $found = 0`)
   {
@@ -58,24 +58,27 @@ if (`SELECT '$wait_for_all' != '1'`)
      real_sleep 0.2;
      let $rowno= 1;
      let $process_result= 1;
-     while (`SELECT $process_result = 1 AND $found = 0`)
+     let $do_loop= 1;
+     while ($do_loop)
      {
         let $field_value= query_get_value($show_statement, $field, $rowno);
         if (`SELECT '$field_value' $condition`)
         {
            let $found= 1;
+	   let $do_loop= 0;
         }
-        if (`SELECT '$field_value' = 'No such row'`)
+        if ($field_value == No such row)
         {
            # We are behind the last row of the result set.
            let $process_result= 0;
+	   let $do_loop= 0;
         }
         inc $rowno;
      }
   }
 }
 
-if (`SELECT '$wait_for_all' = '1'`)
+if ($wait_for_all == 1)
 {
   while (`SELECT UNIX_TIMESTAMP() <= $max_end_time AND $found = 0`)
   {
@@ -83,16 +86,19 @@ if (`SELECT '$wait_for_all' = '1'`)
      real_sleep 0.2;
      let $rowno= 1;
      let $process_result= 1;
-     while (`SELECT $process_result = 1 AND $found = 0`)
+     let $do_loop= 1;
+     while ($do_loop)
      {
         let $field_value= query_get_value($show_statement, $field, $rowno);
-        if (`SELECT '$field_value' = 'No such row'`)
+        if ($field_value == No such row)
         {
            let $found= 1;
+	   let $do_loop= 0;
         }
         if (`SELECT $found = 0 AND NOT '$field_value' $condition`)
         {
            let process_result= 0;
+	   let $do_loop= 0;
         }
         inc $rowno;
      }

mysql-test/mysql-test-run.pl

@@ -1811,17 +1811,17 @@ sub executable_setup () {
   if ( ! $opt_skip_ndbcluster )
   {
     $exe_ndbd=
-      my_find_bin($basedir,
+      my_find_bin($bindir,
 		  ["storage/ndb/src/kernel", "libexec", "sbin", "bin"],
 		  "ndbd");
 
     $exe_ndb_mgmd=
-      my_find_bin($basedir,
+      my_find_bin($bindir,
 		  ["storage/ndb/src/mgmsrv", "libexec", "sbin", "bin"],
 		  "ndb_mgmd");
 
     $exe_ndb_waiter=
-      my_find_bin($basedir,
+      my_find_bin($bindir,
 		  ["storage/ndb/tools/", "bin"],
 		  "ndb_waiter");
 
@@ -2193,12 +2193,12 @@ sub environment_setup {
   if ( ! $opt_skip_ndbcluster )
   {
     $ENV{'NDB_MGM'}=
-      my_find_bin($basedir,
+      my_find_bin($bindir,
 		  ["storage/ndb/src/mgmclient", "bin"],
 		  "ndb_mgm");
 
     $ENV{'NDB_TOOLS_DIR'}=
-      my_find_dir($basedir,
+      my_find_dir($bindir,
 		  ["storage/ndb/tools", "bin"]);
 
     $ENV{'NDB_EXAMPLES_DIR'}=
@@ -2206,7 +2206,7 @@ sub environment_setup {
 		  ["storage/ndb/ndbapi-examples", "bin"]);
 
     $ENV{'NDB_EXAMPLES_BINARY'}=
-      my_find_bin($basedir,
+      my_find_bin($bindir,
 		  ["storage/ndb/ndbapi-examples/ndbapi_simple", "bin"],
 		  "ndbapi_simple", NOT_REQUIRED);
 

mysql-test/r/mysqltest.result

@@ -308,6 +308,10 @@ var3 two columns with same name
 var4 from query that returns NULL
 var5 from query that returns no row
 failing query in let
+create table t1 (a varchar(100));
+insert into t1 values ('`select 42`');
+`select 42`
+drop table t1;
 mysqltest: At line 1: Error running query 'failing query': 1064 You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'failing query' at line 1
 mysqltest: At line 1: Missing required argument 'filename' to command 'source'
 mysqltest: At line 1: Could not open './non_existingFile' for reading, errno: 2
@@ -399,10 +403,40 @@ true-inner
 true-inner again
 true-outer
 Counter is greater than 0, (counter=10)
+Counter should still be 10, is 10
 Counter is not 0, (counter=0)
+Not space var works
 Counter is true, (counter=alpha)
-Beta is true
 while with string, only once
+5<7
+5<7 again
+5<7 still
+5<6
+5>=5
+5>=5 again
+5>3
+5==5
+5!=8
+5!=five
+5==3+2
+5   ==   5
+hello == hello
+hello   ==   hello
+hello != goodbye
+two words
+two words are two words
+right answer
+anything goes
+0 != string
+mysqltest: At line 2: Only == and != are supported for string values
+mysqltest: At line 2: Found junk '~= 6' after $variable in condition
+mysqltest: At line 2: Expression in if/while must beging with $, ` or a number
+counter is 2
+counter is 3
+counter is 4
+counter is 5
+counter is 6
+counter is 7
 1
 Testing while with not
 mysqltest: In included file "MYSQLTEST_VARDIR/tmp/mysqltest_while.inc": At line 64: Nesting too deeply
@@ -807,8 +841,6 @@ dir-list.txt
 SELECT 'c:\\a.txt' AS col;
 col
 z
-hej
-mysqltest: At line 1: Found junk ' != 143' after $variable in expression
 select 1;
 1
 1

mysql-test/suite/binlog/t/binlog_row_mysqlbinlog_db_filter.test

@@ -83,17 +83,17 @@ while($i)
   -- let $flags=--database=b42941
 
   # construct CLI for mysqlbinlog
-  if(`SELECT $i=3`)
+  if($i==3)
   {
     -- let $flags= $flags --verbose --hexdump
   }
 
-  if(`SELECT $i=2`)
+  if($i==2)
   {
     -- let $flags= $flags --verbose
   }
 
-#  if(`SELECT $i=1`)
+#  if($i==1)
 #  {
     # do nothing $flags is already set as it should be
 #  }

mysql-test/suite/binlog/t/binlog_stm_unsafe_warning.test

@@ -116,7 +116,7 @@ DROP TABLE t1;
 SET GLOBAL log_warnings = @old_log_warnings;
 
 let $log_error_= `SELECT @@GLOBAL.log_error`;
-if(!`select LENGTH('$log_error_')`)
+if(!$log_error_)
 {
   # MySQL Server on windows is started with --console and thus
   # does not know the location of its .err log, use default location

mysql-test/suite/binlog/t/binlog_unsafe.test

@@ -141,11 +141,11 @@ END|
 # In each iteration of this loop, we select one method to make the
 # statement unsafe.
 --let $unsafe_type= 0
-while (`SELECT $unsafe_type < 9`) {
+while ($unsafe_type < 9) {
 
   --echo
 
-  if (`SELECT $unsafe_type = 0`) {
+  if ($unsafe_type == 0) {
     --echo ==== Testing UUID() unsafeness ====
     --let $desc_0= unsafe UUID() function
     --let $stmt_sidef_0= INSERT INTO t0 VALUES (UUID())
@@ -155,7 +155,7 @@ while (`SELECT $unsafe_type < 9`) {
     --let $CRC_ARG_expected_number_of_warnings= 1
   }
 
-  if (`SELECT $unsafe_type = 1`) {
+  if ($unsafe_type == 1) {
     --echo ==== Testing @@hostname unsafeness ====
     --let $desc_0= unsafe @@hostname variable
     --let $stmt_sidef_0= INSERT INTO t0 VALUES (@@hostname)
@@ -168,7 +168,7 @@ while (`SELECT $unsafe_type < 9`) {
     --let $CRC_ARG_expected_number_of_warnings= 1
   }
 
-  if (`SELECT $unsafe_type = 2`) {
+  if ($unsafe_type == 2) {
     --echo ==== Testing SELECT...LIMIT unsafeness ====
     --let $desc_0= unsafe SELECT...LIMIT statement
     --let $stmt_sidef_0= INSERT INTO t0 SELECT * FROM data_table LIMIT 1
@@ -178,7 +178,7 @@ while (`SELECT $unsafe_type < 9`) {
     --let $CRC_ARG_expected_number_of_warnings= 1
   }
 
-  if (`SELECT $unsafe_type = 3`) {
+  if ($unsafe_type == 3) {
     --echo ==== Testing INSERT DELAYED safeness after BUG#54579 is fixed ====
     --let $desc_0= unsafe INSERT DELAYED statement
     --let $stmt_sidef_0= INSERT DELAYED INTO t0 VALUES (1), (2)
@@ -188,7 +188,7 @@ while (`SELECT $unsafe_type < 9`) {
     --let $CRC_ARG_expected_number_of_warnings= 0
   }
 
-  if (`SELECT $unsafe_type = 4`) {
+  if ($unsafe_type == 4) {
     --echo ==== Testing unsafeness of insert of two autoinc values ====
     --let $desc_0= unsafe update of two autoinc columns
     --let $stmt_sidef_0= INSERT INTO double_autoinc_table VALUES (NULL)
@@ -198,7 +198,7 @@ while (`SELECT $unsafe_type < 9`) {
     --let $CRC_ARG_expected_number_of_warnings= 1
   }
 
-  if (`SELECT $unsafe_type = 5`) {
+  if ($unsafe_type == 5) {
     --echo ==== Testing unsafeness of UDF's ====
     --let $desc_0= unsafe UDF
     --let $stmt_sidef_0= INSERT INTO t0 VALUES (myfunc_int(10))
@@ -208,7 +208,7 @@ while (`SELECT $unsafe_type < 9`) {
     --let $CRC_ARG_expected_number_of_warnings= 1
   }
 
-  if (`SELECT $unsafe_type = 6`) {
+  if ($unsafe_type == 6) {
     --echo ==== Testing unsafeness of access to mysql.general_log ====
     --let $desc_0= unsafe use of mysql.general_log
     --let $stmt_sidef_0= INSERT INTO t0 SELECT COUNT(*) FROM mysql.general_log
@@ -218,7 +218,7 @@ while (`SELECT $unsafe_type < 9`) {
     --let $CRC_ARG_expected_number_of_warnings= 1
   }
 
-  if (`SELECT $unsafe_type = 7`) {
+  if ($unsafe_type == 7) {
     --echo ==== Testing a statement that is unsafe in many ways ====
     --let $desc_0= statement that is unsafe in many ways
     # Concatenate three unsafe values, and then concatenate NULL to
@@ -230,7 +230,7 @@ while (`SELECT $unsafe_type < 9`) {
     --let $CRC_ARG_expected_number_of_warnings= 6
   }
 
-  if (`SELECT $unsafe_type = 8`) {
+  if ($unsafe_type == 8) {
     --echo ==== Testing a statement that is unsafe several times ====
     --let $desc_0= statement that is unsafe several times
     --let $stmt_sidef_0= INSERT INTO ta0 VALUES (multi_unsafe_func())
@@ -249,7 +249,7 @@ while (`SELECT $unsafe_type < 9`) {
   # construct. Instead, we just invoke the unsafe statement directly.
 
   --let $call_type_1= 0
-  while (`SELECT $call_type_1 < 8`) {
+  while ($call_type_1 < 8) {
     #--echo debug: level 1, types $call_type_1 -> $unsafe_type
     --let $CRC_ARG_level= 1
     --let $CRC_ARG_type= $call_type_1
@@ -280,7 +280,7 @@ while (`SELECT $unsafe_type < 9`) {
       # construct.
 
       --let $call_type_2= 0
-      while (`SELECT $call_type_2 < 7`) {
+      while ($call_type_2 < 7) {
         #--echo debug: level 2, types $call_type_2 -> $call_type_1 -> $unsafe_type
         --let $CRC_ARG_level= 2
         --let $CRC_ARG_type= $call_type_2
@@ -309,7 +309,7 @@ while (`SELECT $unsafe_type < 9`) {
           # construct.
 
           --let $call_type_3= 0
-          while (`SELECT $call_type_3 < 7`) {
+          while ($call_type_3 < 7) {
             #--echo debug: level 3, types $call_type_2 -> $call_type_2 -> $call_type_1 -> $unsafe_type
             --let $CRC_ARG_level= 3
             --let $CRC_ARG_type= $call_type_3

mysql-test/suite/federated/federated_bug_25714.test

  # Check that path to the specific test program has been setup
-if (`select LENGTH("$MYSQL_BUG25714") = 0`)
+if (!$MYSQL_BUG25714)
 {
   skip Need bug25714 test program;
 }

mysql-test/suite/perfschema_stress/t/modify.test

@@ -19,7 +19,7 @@
 let $have_table= `SELECT COUNT(*) FROM INFORMATION_SCHEMA.TABLES
                   WHERE TABLE_SCHEMA='test' AND TABLE_NAME='t1'`;
 
-if (`SELECT ($have_table = 0)`) {
+if (!$have_table) {
     --source suite/perfschema_stress/t/setup.test
 }
 

mysql-test/suite/perfschema_stress/t/setup.test

@@ -23,10 +23,10 @@ if (`SELECT VERSION() LIKE '%embedded%'`)
 --disable_query_log
 --disable_result_log
 
-if (`SELECT LENGTH('$engine_type') = 0`) {
+if (!$engine_type) {
   let $engine_type= $default_engine_type;
 }
-if (`SELECT '$engine_type' = 'Falcon'`) {
+if ($engine_type == Falcon) {
   --source include/have_falcon.inc
 }
 

mysql-test/suite/perfschema_stress/t/work.test

@@ -19,7 +19,7 @@
 let $have_table= `SELECT COUNT(*) FROM INFORMATION_SCHEMA.TABLES
                   WHERE TABLE_SCHEMA='test' AND TABLE_NAME='t1'`;
 
-if (`SELECT ($have_table = 0)`) {
+if (!$have_table) {
     --source suite/perfschema_stress/t/setup.test
 }
 

mysql-test/suite/rpl/t/rpl_change_master.test

@@ -23,7 +23,7 @@ source include/stop_slave.inc;
 
 let $read_pos= query_get_value(SHOW SLAVE STATUS, Read_Master_Log_Pos, 1);
 let $exec_pos= query_get_value(SHOW SLAVE STATUS, Exec_Master_Log_Pos, 1);
-if (`SELECT $read_pos = $exec_pos`)
+if ($read_pos == $exec_pos)
 {
   source include/show_rpl_debug_info.inc;
   echo 'Read_Master_Log_Pos: $read_pos' == 'Exec_Master_Log_Pos: $exec_pos';
@@ -32,7 +32,7 @@ if (`SELECT $read_pos = $exec_pos`)
 change master to master_user='root';
 let $read_pos= query_get_value(SHOW SLAVE STATUS, Read_Master_Log_Pos, 1);
 let $exec_pos= query_get_value(SHOW SLAVE STATUS, Exec_Master_Log_Pos, 1);
-if (`SELECT $read_pos <> $exec_pos`)
+if ($read_pos != $exec_pos)
 {
   source include/show_rpl_debug_info.inc;
   echo 'Read_Master_Log_Pos: $read_pos' <> 'Exec_Master_Log_Pos: $exec_pos';

mysql-test/suite/rpl/t/rpl_concurrency_error.test

@@ -53,24 +53,24 @@ while ($type)
 {
   let $binlog_start= query_get_value("SHOW MASTER STATUS", Position, 1);
   connection conn1;
-  if (`select $type = 2`)
+  if ($type == 2)
   {
     SET AUTOCOMMIT = 1;
     BEGIN;
   }
-  if (`select $type = 1`)
+  if ($type == 1)
   {
     SET AUTOCOMMIT = 0;
   }
   eval UPDATE t SET f = 'yellow $type' WHERE i = 3;
   
   connection conn2;
-  if (`select $type = 2`)
+  if ($type == 2)
   {
     SET AUTOCOMMIT = 1;
     BEGIN;
   }
-  if (`select $type = 1`)
+  if ($type == 1)
   {
     SET AUTOCOMMIT = 0;
   }
@@ -88,24 +88,24 @@ while ($type)
 
   let $binlog_start= query_get_value("SHOW MASTER STATUS", Position, 1);
   connection conn1;
-  if (`select $type = 2`)
+  if ($type == 2)
   {
     SET AUTOCOMMIT = 1;
     BEGIN;
   }
-  if (`select $type = 1`)
+  if ($type == 1)
   {
     SET AUTOCOMMIT = 0;
   }
   eval UPDATE t SET f = 'gray $type' WHERE i = 3;
   
   connection conn2;
-  if (`select $type = 2`)
+  if ($type == 2)
   {
     SET AUTOCOMMIT = 1;
     BEGIN;
   }
-  if (`select $type = 1`)
+  if ($type == 1)
   {
     SET AUTOCOMMIT = 0;
   }

mysql-test/suite/rpl/t/rpl_heartbeat.test

@@ -142,7 +142,7 @@ source include/check_slave_param.inc;
 let $slave_wait_param_counter= 300;
 let $slave_value= query_get_value("SHOW STATUS like 'Slave_received_heartbeats'", Value, 1);
 # Checking the fact that at least one heartbeat is received
-while (`select $slave_value = 0`)
+while (!$slave_value)
 {
   dec $slave_wait_param_counter;
   if (!$slave_wait_param_counter)

mysql-test/suite/rpl/t/rpl_mysql_upgrade.test

@@ -30,7 +30,7 @@ sync_slave_with_master;
 connection master;
 let $after_position= query_get_value(SHOW MASTER STATUS, Position, 1);
 
-if (`SELECT '$before_position'='$after_position'`)
+if ($before_position == $after_position)
 {
   echo Master position is not changed;
 }
@@ -48,7 +48,7 @@ connection master;
 let $after_file= query_get_value(SHOW MASTER STATUS, File, 1);
 let $after_position= query_get_value(SHOW MASTER STATUS, Position, 1);
 
-if (!`SELECT '$before_position'='$after_position'`)
+if ($before_position != $after_position)
 {
   echo Master position has been changed;
 }

mysql-test/suite/rpl/t/rpl_semi_sync.test

@@ -58,7 +58,7 @@ echo [ on master ];
 
 disable_query_log;
 let $value = query_get_value(show variables like 'rpl_semi_sync_master_enabled', Value, 1);
-if (`select '$value' = 'No such row'`)
+if ($value == No such row)
 {
     set sql_log_bin=0;
     eval INSTALL PLUGIN rpl_semi_sync_master SONAME '$SEMISYNC_MASTER_PLUGIN';
@@ -123,7 +123,7 @@ echo [ on slave ];
 
 disable_query_log;
 let $value= query_get_value(show variables like 'rpl_semi_sync_slave_enabled', Value, 1);
-if (`select '$value' = 'No such row'`)
+if ($value == No such row)
 {
     set sql_log_bin=0;
     eval INSTALL PLUGIN rpl_semi_sync_slave SONAME '$SEMISYNC_SLAVE_PLUGIN';

mysql-test/suite/rpl/t/rpl_semi_sync_event.test

@@ -20,7 +20,7 @@ enable_query_log;
 connection master;
 disable_query_log;
 let $value = query_get_value(show variables like 'rpl_semi_sync_master_enabled', Value, 1);
-if (`select '$value' = 'No such row'`)
+if ($value == No such row)
 {
     set sql_log_bin=0;
     eval INSTALL PLUGIN rpl_semi_sync_master SONAME '$SEMISYNC_MASTER_PLUGIN';
@@ -34,7 +34,7 @@ source include/stop_slave.inc;
 
 disable_query_log;
 let $value= query_get_value(show variables like 'rpl_semi_sync_slave_enabled', Value, 1);
-if (`select '$value' = 'No such row'`)
+if ($value == No such row)
 {
     set sql_log_bin=0;
     eval INSTALL PLUGIN rpl_semi_sync_slave SONAME '$SEMISYNC_SLAVE_PLUGIN';

mysql-test/suite/rpl/t/rpl_slow_query_log.test

@@ -233,7 +233,7 @@ let $master_slow_query= `SELECT count(*) = 1 FROM mysql.slow_log WHERE sql_text
 -- sync_slave_with_master
 let $slave_slow_query= `SELECT count(*) = 1 FROM mysql.slow_log WHERE sql_text like '$slow_query'`;
 
-if (`SELECT $master_slow_query != $slave_slow_query`)
+if ($master_slow_query != $slave_slow_query)
 {
   -- connection master
   -- echo ***********************************************
@@ -250,7 +250,7 @@ if (`SELECT $master_slow_query != $slave_slow_query`)
   -- die "Assertion failed! Master and slave slow log contents differ. Bailing out!"
 }
 
-if (`SELECT $master_slow_query = $slave_slow_query`)
+if ($master_slow_query == $slave_slow_query)
 {
   -- echo ### Assertion is good. Both Master and Slave exhibit the 
   -- echo ### same number of queries in slow log: $master_slow_query
@@ -276,7 +276,7 @@ let $master_slow_query= `SELECT count(*) = 1 FROM mysql.slow_log WHERE sql_text
 -- sync_slave_with_master
 let $slave_slow_query= `SELECT count(*) = 1 FROM mysql.slow_log WHERE sql_text like '$slow_query'`;
 
-if (`SELECT $master_slow_query != $slave_slow_query`)
+if ($master_slow_query != $slave_slow_query)
 {
   -- connection master
   -- echo ***********************************************
@@ -293,7 +293,7 @@ if (`SELECT $master_slow_query != $slave_slow_query`)
   -- die "Assertion failed! Master and slave slow log contents differ. Bailing out!"
 }
 
-if (`SELECT $master_slow_query = $slave_slow_query`)
+if ($master_slow_query == $slave_slow_query)
 {
   -- echo ### Assertion is good. Both Master and Slave exhibit the 
   -- echo ### same number of queries in slow log: $master_slow_query

mysql-test/suite/rpl/t/rpl_ssl.test

@@ -75,7 +75,7 @@ source include/check_slave_is_running.inc;
 
 let $slave_count= `select count(*) from t1`;
 
-if (`select $slave_count != $master_count`)
+if ($slave_count != $master_count)
 {
   echo master and slave differed in number of rows;
   echo master: $master_count;

mysql-test/suite/sys_vars/t/slow_launch_time_func.test

@@ -84,7 +84,7 @@ let $value_before=
 CONNECT (conn2,localhost,root,,);
 let $value_after=
    query_get_value(show status like 'slow_launch_threads', Value, 1);
-if (!`SELECT $value_after = $value_before`)
+if ($value_after != $value_before)
 {
    --echo ERROR: Subtest FN_DYNVARS_124_02 failed
    --echo A new connect must not be counted as 'slow_launch_thread' if

mysql-test/t/change_user.test

@@ -117,7 +117,7 @@ let $before= query_get_value(SHOW GLOBAL STATUS LIKE 'com_select',Value,1);
 
 let $after= query_get_value(SHOW GLOBAL STATUS LIKE 'com_select',Value,1);
 
-if (`select $after != $before`){
+if ($after != $before){
   SHOW GLOBAL STATUS LIKE 'com_select';
   die The value of com_select changed during change_user;
 }

mysql-test/t/execution_constants.test

@@ -49,7 +49,7 @@ while ($i)
     let $i = 1//
 
     # Check that mysql_errno is 1436
-    if (`select $mysql_errno != 1436`)
+    if ($mysql_errno != 1436)
     {
       die Wrong error triggered, expected 1436 but got $mysql_errno//
     }

mysql-test/t/fix_priv_tables.test

@@ -3,7 +3,7 @@
 
 # Don't run this test if $MYSQL_FIX_PRIVILEGE_TABLES isn't set
 # to the location of mysql_fix_privilege_tables.sql
-if (`SELECT LENGTH("$MYSQL_FIX_PRIVILEGE_TABLES") <= 0`)
+if (!$MYSQL_FIX_PRIVILEGE_TABLES)
 {
   skip Test need MYSQL_FIX_PRIVILEGE_TABLES;
 }

mysql-test/t/mysqltest.test

@@ -854,6 +854,13 @@ let $var2= `failing query`;
 echo $var2;
 EOF
 
+create table t1 (a varchar(100));
+insert into t1 values ('`select 42`');
+let $a= `select * from t1`;
+# This should output `select 42`, not evaluate it again to 42
+echo $a;
+drop table t1;
+
 --error 1
 --exec $MYSQL_TEST < $MYSQLTEST_VARDIR/tmp/let.sql 2>&1
 
@@ -1134,6 +1141,11 @@ if (!$counter)
 {
   echo Counter is not 0, (counter=10);
 }
+if (! $counter)
+{
+  let $counter=5;
+}
+echo Counter should still be 10, is $counter;
 let $counter=0;
 if($counter)
 {
@@ -1143,6 +1155,10 @@ if (!$counter)
 {
   echo Counter is not 0, (counter=0);
 }
+if (! $counter)
+{
+  echo Not space var works;
+}
 
 # ----------------------------------------------------------------------------
 # Test if with some non-numerics
@@ -1163,10 +1179,11 @@ if ($counter)
 {
   echo oops, -0 is true;
 }
-if (beta)
-{
-  echo Beta is true;
-}
+# This is no longer allowed, as a precaution against mistyped conditionals
+# if (beta)
+# {
+#   echo Beta is true;
+# }
 let $counter=gamma;
 while ($counter)
 {
@@ -1174,6 +1191,179 @@ while ($counter)
   let $counter=000;
 }
 
+# ----------------------------------------------------------------------------
+# Test if with compare conditions
+# ----------------------------------------------------------------------------
+
+let $ifvar= 5;
+let $ifvar2= 6;
+
+if ($ifvar < 7)
+{
+  echo 5<7;
+}
+if ($ifvar< 7)
+{
+  echo 5<7 again;
+}
+if ($ifvar<7)
+{
+  echo 5<7 still;
+}
+if ($ifvar < $ifvar2)
+{
+  echo 5<6;
+}
+if ($ifvar <= 4)
+{
+  echo 5<=4;
+}
+if ($ifvar >= 5)
+{
+  echo 5>=5;
+}
+if ($ifvar>=5)
+{
+  echo 5>=5 again;
+}
+if ($ifvar > 3)
+{
+  echo 5>3;
+}
+if ($ifvar == 4)
+{
+  echo 5==4;
+}
+if ($ifvar == 5)
+{
+  echo 5==5;
+}
+if ($ifvar != 8)
+{
+  echo 5!=8;
+}
+# Any number should compare unequal to any string
+if ($ifvar != five)
+{
+  echo 5!=five;
+}
+if ($ifvar == `SELECT 3+2`)
+{
+  echo 5==3+2;
+}
+if ($ifvar    ==       5)
+{
+  echo 5   ==   5;
+}
+let $ifvar= hello;
+if ($ifvar == hello there)
+{
+  echo hello == hello there;
+}
+if ($ifvar == hello)
+{
+  echo hello == hello;
+}
+if ($ifvar == hell)
+{
+  echo hello == hell;
+}
+if ($ifvar    ==    hello)
+{
+  echo hello   ==   hello;
+}
+if ($ifvar != goodbye)
+{
+  echo hello != goodbye;
+}
+
+let $ifvar= two words;
+if ($ifvar == two words)
+{
+  echo two words;
+}
+if ($ifvar == `SELECT 'two words'`)
+{
+  echo two words are two words;
+}
+if (42)
+{
+  echo right answer;
+}
+if (0)
+{
+  echo wrong answer;
+}
+# Non-empty string treated as 'true'
+if (`SELECT 'something'`)
+{
+  echo anything goes;
+}
+# Make sure 0 and string compare right
+let $ifvar= 0;
+if ($ifvar == string)
+{
+  echo 0 == string;
+}
+if ($ifvar != string)
+{
+  echo 0 != string;
+}
+--write_file $MYSQL_TMP_DIR/mysqltest.sql
+let $var= 5;
+if ($var >= four)
+{
+ echo 5>=four;
+}
+EOF
+--error 1
+--exec $MYSQL_TEST < $MYSQL_TMP_DIR/mysqltest.sql 2>&1
+remove_file $MYSQL_TMP_DIR/mysqltest.sql;
+
+--write_file $MYSQL_TMP_DIR/mysqltest.sql
+let $var= 5;
+if ($var ~= 6)
+{
+ echo 5~=6;
+}
+EOF
+--error 1
+--exec $MYSQL_TEST < $MYSQL_TMP_DIR/mysqltest.sql 2>&1
+remove_file $MYSQL_TMP_DIR/mysqltest.sql;
+
+--write_file $MYSQL_TMP_DIR/mysqltest.sql
+let $var= text;
+if (var == text)
+{
+ echo Oops I forgot the $;
+}
+EOF
+--error 1
+--exec $MYSQL_TEST < $MYSQL_TMP_DIR/mysqltest.sql 2>&1
+remove_file $MYSQL_TMP_DIR/mysqltest.sql;
+
+# ----------------------------------------------------------------------------
+# Test while with compare conditions
+# ----------------------------------------------------------------------------
+
+let $counter= 2;
+
+while ($counter < 5)
+{
+  echo counter is $counter;
+  inc $counter;
+}
+let $ifvar=;
+while ($ifvar != stop)
+{
+  if ($counter >= 7)
+  {
+    let $ifvar= stop;
+  }
+  echo counter is $counter;
+  inc $counter;
+}
+
 # ----------------------------------------------------------------------------
 # Test while, { and }
 # ----------------------------------------------------------------------------
@@ -2438,15 +2628,15 @@ let $count= 0;
 while ($run)
 {
    let $Field=   query_get_value($show_statement, Field,   $rowno);
-   if (`SELECT '$Field' = 'No such row'`)
+   if ($Field == No such row)
    {
       let $run= 0;
    }
-   if (`SELECT '$Field' <> 'No such row'`)
+   if ($Field != No such row)
    {
       let $Type=    query_get_value($show_statement, Type,    $rowno);
       let $Null=    query_get_value($show_statement, Null,    $rowno);
-      if (`SELECT '$Null' = 'YES'`)
+      if ($Null == YES)
       {
          inc $count;
       }
@@ -2529,26 +2719,6 @@ rmdir $MYSQLTEST_VARDIR/tmp/testdir;
 --replace_result c:\\a.txt z
 SELECT 'c:\\a.txt' AS col;
 
-#
-# Bug#32307 mysqltest - does not detect illegal if syntax
-#
-
-let $test= 1;
-if ($test){
-  echo hej;
-}
-
---write_file $MYSQLTEST_VARDIR/tmp/mysqltest.sql
-if ($mysql_errno != 1436)
-{
- echo ^ Should not be allowed!
-}
-EOF
---error 1
---exec $MYSQL_TEST < $MYSQLTEST_VARDIR/tmp/mysqltest.sql 2>&1
-remove_file $MYSQLTEST_VARDIR/tmp/mysqltest.sql;
-
-
 # ----------------------------------------------------------------------------
 # Test that -- is not allowed as comment, only as mysqltest builtin command
 # ----------------------------------------------------------------------------

mysql-test/t/named_pipe.test

@@ -5,7 +5,7 @@
 
 # Only run this test if named pipe is avaliable
 let $nmp= query_get_value("SHOW VARIABLES LIKE 'named_pipe'", Value, 1);
-if (`SELECT '$nmp' != 'ON'`){
+if ($nmp != ON){
   skip No named pipe support;
 }
 

mysql-test/t/shm.test

@@ -4,7 +4,7 @@
 
 # Only run this test if shared memory is avaliable
 let $shm= query_get_value("SHOW VARIABLES LIKE 'shared_memory'", Value, 1);
-if (`SELECT '$shm' != 'ON'`){
+if ($shm != ON){
   skip No shm support;
 }
 let $shm_name= query_get_value("SHOW GLOBAL VARIABLES LIKE 'shared_memory_base_name'", Value, 1);

mysql-test/t/system_mysql_db_fix40123.test

@@ -3,7 +3,7 @@
 
 # Don't run this test if $MYSQL_FIX_PRIVILEGE_TABLES isn't set
 # to the location of mysql_fix_privilege_tables.sql
-if (`SELECT LENGTH("$MYSQL_FIX_PRIVILEGE_TABLES") <= 0`)
+if (!$MYSQL_FIX_PRIVILEGE_TABLES)
 {
   skip Test need MYSQL_FIX_PRIVILEGE_TABLES;
 }

mysql-test/t/system_mysql_db_fix50030.test

@@ -3,7 +3,7 @@
 
 # Don't run this test if $MYSQL_FIX_PRIVILEGE_TABLES isn't set
 # to the location of mysql_fix_privilege_tables.sql
-if (`SELECT LENGTH("$MYSQL_FIX_PRIVILEGE_TABLES") <= 0`)
+if (!$MYSQL_FIX_PRIVILEGE_TABLES)
 {
   skip Test needs MYSQL_FIX_PRIVILEGE_TABLES;
 }

mysql-test/t/system_mysql_db_fix50117.test

@@ -3,7 +3,7 @@
 
 # Don't run this test if $MYSQL_FIX_PRIVILEGE_TABLES isn't set
 # to the location of mysql_fix_privilege_tables.sql
-if (`SELECT LENGTH("$MYSQL_FIX_PRIVILEGE_TABLES") <= 0`)
+if (!$MYSQL_FIX_PRIVILEGE_TABLES)
 {
   skip Test needs MYSQL_FIX_PRIVILEGE_TABLES;
 }

unittest/unit.pl

@@ -14,7 +14,6 @@
 # along with this program; if not, write to the Free Software
 # Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 
-use Test::Harness;
 use File::Find;
 use Getopt::Long;
 
@@ -38,9 +37,10 @@ unit - Run unit tests in directory
 
 my $big= $ENV{'MYTAP_CONFIG'} eq 'big';
 
+my $opt_verbose;
 my $result = GetOptions (
   "big!"        => \$big,
-  "verbose!"    => \$Test::Harness::verbose,
+  "verbose!"    => \$opt_verbose,
 );
 
 $ENV{'MYTAP_CONFIG'} = $big ? 'big' : '';
@@ -60,6 +60,19 @@ Run all unit tests in the current directory and all subdirectories.
 
 =cut
 
+BEGIN {
+    # Test::Harness have been extensively rewritten in newer perl
+    # versions and is now just a backward compatibility wrapper
+    # (with a bug causing the HARNESS_PERL_SWITCHES to be mangled)
+    # Prefer to use TAP::Harness directly if available
+    if (eval "use TAP::Harness; 1") {
+        eval 'sub NEW_HARNESS { 1 }';
+        warn "using TAP::Harness";
+    } else {
+        eval "use Test::Harness; 1" or  die "couldn't find Test::Harness!";
+        eval 'sub NEW_HARNESS { 0 }';
+    }
+}
 
 sub _find_test_files (@) {
     my @dirs = @_;
@@ -102,8 +115,19 @@ sub run_cmd (@) {
     if (@files > 0) {
         # Removing the first './' from the file names
         foreach (@files) { s!^\./!! }
-        $ENV{'HARNESS_PERL_SWITCHES'} .= ' -e "exec @ARGV"';
-        runtests @files;
+
+        if (NEW_HARNESS())
+        {
+          my %args = ( exec => [ ], verbosity => $opt_verbose );
+          my $harness = TAP::Harness->new( \%args );
+          $harness->runtests(@files);
+        }
+        else
+        {
+          $ENV{'HARNESS_VERBOSE'} =  $opt_verbose;
+          $ENV{'HARNESS_PERL_SWITCHES'} .= ' -e "exec @ARGV"';
+          runtests(@files);
+        }
     }
 }