Cleanup: now that we have Lex_input_stream, finish the transition

by moving yet another relevant flag to it from struct LEX.

mysql-test/r/ps.result

@@ -26,11 +26,11 @@ ERROR HY000: Unknown prepared statement handler (no_such_statement) given to DEA
 execute stmt1;
 ERROR HY000: Incorrect arguments to EXECUTE
 prepare stmt2 from 'prepare nested_stmt from "select 1"';
-ERROR 42000: 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 '"select 1"' at line 1
+ERROR HY000: This command is not supported in the prepared statement protocol yet
 prepare stmt2 from 'execute stmt1';
-ERROR 42000: 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 'stmt1' at line 1
+ERROR HY000: This command is not supported in the prepared statement protocol yet
 prepare stmt2 from 'deallocate prepare z';
-ERROR 42000: 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 'z' at line 1
+ERROR HY000: This command is not supported in the prepared statement protocol yet
 prepare stmt3 from 'insert into t1 values (?,?)';
 set @arg1=5, @arg2='five';
 execute stmt3 using @arg1, @arg2;

mysql-test/r/ps_1general.result

@@ -391,11 +391,11 @@ drop table t5 ;
 deallocate prepare stmt_do ;
 deallocate prepare stmt_set ;
 prepare stmt1 from ' prepare stmt2 from '' select 1 ''  ' ;
-ERROR 42000: 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 '' select 1 '' at line 1
+ERROR HY000: This command is not supported in the prepared statement protocol yet
 prepare stmt1 from ' execute stmt2 ' ;
-ERROR 42000: 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 'stmt2' at line 1
+ERROR HY000: This command is not supported in the prepared statement protocol yet
 prepare stmt1 from ' deallocate prepare never_prepared ' ;
-ERROR 42000: 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 'never_prepared' at line 1
+ERROR HY000: This command is not supported in the prepared statement protocol yet
 prepare stmt4 from ' use test ' ;
 ERROR HY000: This command is not supported in the prepared statement protocol yet
 prepare stmt3 from ' create database mysqltest ';

mysql-test/t/ps.test

@@ -33,13 +33,13 @@ deallocate prepare no_such_statement;
 execute stmt1;
 
 # Nesting ps commands is not allowed: 
---error 1064
+--error ER_UNSUPPORTED_PS 
 prepare stmt2 from 'prepare nested_stmt from "select 1"';
 
---error 1064
+--error ER_UNSUPPORTED_PS 
 prepare stmt2 from 'execute stmt1';
 
---error 1064
+--error ER_UNSUPPORTED_PS 
 prepare stmt2 from 'deallocate prepare z';
 
 # PS insert 

mysql-test/t/ps_1general.test

@@ -416,11 +416,11 @@ deallocate prepare stmt_do ;
 deallocate prepare stmt_set ;
 
 ## nonsense like prepare of prepare,execute or deallocate
---error 1064
+--error ER_UNSUPPORTED_PS 
 prepare stmt1 from ' prepare stmt2 from '' select 1 ''  ' ;
---error 1064
+--error ER_UNSUPPORTED_PS 
 prepare stmt1 from ' execute stmt2 ' ;
---error 1064
+--error ER_UNSUPPORTED_PS 
 prepare stmt1 from ' deallocate prepare never_prepared ' ;
 
 ## switch the database connection

sql/sql_lex.cc

@@ -123,7 +123,8 @@ Lex_input_stream::Lex_input_stream(THD *thd,
   buf(buffer),
   next_state(MY_LEX_START),
   found_semicolon(NULL),
-  ignore_space(test(thd->variables.sql_mode & MODE_IGNORE_SPACE))
+  ignore_space(test(thd->variables.sql_mode & MODE_IGNORE_SPACE)),
+  stmt_prepare_mode(FALSE)
 {
 }
 
@@ -172,7 +173,6 @@ void lex_start(THD *thd)
   lex->describe= 0;
   lex->subqueries= FALSE;
   lex->view_prepare_mode= FALSE;
-  lex->stmt_prepare_mode= FALSE;
   lex->derived_tables= 0;
   lex->lock_option= TL_READ;
   lex->safe_to_cache_query= 1;
@@ -586,7 +586,7 @@ int MYSQLlex(void *arg, void *yythd)
         its value in a query for the binlog, the query must stay
         grammatically correct.
       */
-      else if (c == '?' && lex->stmt_prepare_mode && !ident_map[yyPeek()])
+      else if (c == '?' && lip->stmt_prepare_mode && !ident_map[yyPeek()])
         return(PARAM_MARKER);
       return((int) c);
 
@@ -989,7 +989,7 @@ int MYSQLlex(void *arg, void *yythd)
       if (yyPeek())
       {
         if ((thd->client_capabilities & CLIENT_MULTI_STATEMENTS) && 
-            !lex->stmt_prepare_mode)
+            !lip->stmt_prepare_mode)
         {
 	  lex->safe_to_cache_query= 0;
           lip->found_semicolon= lip->ptr;

sql/sql_lex.h

@@ -954,6 +954,11 @@ class Lex_input_stream
 
   /** SQL_MODE = IGNORE_SPACE. */
   bool ignore_space;
+  /*
+    TRUE if we're parsing a prepared statement: in this mode
+    we should allow placeholders and disallow multi-statements.
+  */
+  bool stmt_prepare_mode;
 };
 
 
@@ -1082,11 +1087,6 @@ typedef struct st_lex : public Query_tables_list
     to an .frm file. We need this definition to stay untouched.
   */
   bool view_prepare_mode;
-  /*
-    TRUE if we're parsing a prepared statement: in this mode
-    we should allow placeholders and disallow multistatements.
-  */
-  bool stmt_prepare_mode;
   bool safe_to_cache_query;
   bool subqueries, ignore;
   st_parsing_options parsing_options;

sql/sql_prepare.cc

@@ -1762,6 +1762,9 @@ static bool check_prepared_statement(Prepared_statement *stmt,
   case SQLCOM_OPTIMIZE:
     break;
 
+  case SQLCOM_PREPARE:
+  case SQLCOM_EXECUTE:
+  case SQLCOM_DEALLOCATE_PREPARE:
   default:
     /* All other statements are not supported yet. */
     my_message(ER_UNSUPPORTED_PS, ER(ER_UNSUPPORTED_PS), MYF(0));
@@ -2801,10 +2804,10 @@ bool Prepared_statement::prepare(const char *packet, uint packet_len)
   thd->stmt_arena= this;
 
   Lex_input_stream lip(thd, thd->query, thd->query_length);
+  lip.stmt_prepare_mode= TRUE;
   thd->m_lip= &lip;
   lex_start(thd);
   lex->safe_to_cache_query= FALSE;
-  lex->stmt_prepare_mode= TRUE;
   int err= MYSQLparse((void *)thd);
 
   error= err || thd->is_fatal_error ||

sql/sql_yacc.yy

@@ -1276,11 +1276,6 @@ deallocate:
         {
           THD *thd=YYTHD;
           LEX *lex= thd->lex;
-          if (lex->stmt_prepare_mode)
-          {
-            my_parse_error(ER(ER_SYNTAX_ERROR));
-            MYSQL_YYABORT;
-          }
           lex->sql_command= SQLCOM_DEALLOCATE_PREPARE;
           lex->prepared_stmt_name= $3;
         };
@@ -1296,11 +1291,6 @@ prepare:
         {
           THD *thd=YYTHD;
           LEX *lex= thd->lex;
-          if (lex->stmt_prepare_mode)
-          {
-            my_parse_error(ER(ER_SYNTAX_ERROR));
-            MYSQL_YYABORT;
-          }
           lex->sql_command= SQLCOM_PREPARE;
           lex->prepared_stmt_name= $2;
         };
@@ -1326,11 +1316,6 @@ execute:
         {
           THD *thd=YYTHD;
           LEX *lex= thd->lex;
-          if (lex->stmt_prepare_mode)
-          {
-            my_parse_error(ER(ER_SYNTAX_ERROR));
-            MYSQL_YYABORT;
-          }
           lex->sql_command= SQLCOM_EXECUTE;
           lex->prepared_stmt_name= $2;
         }