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:
  Update result.
mysql-test/r/ps_1general.result:
  Update result.
mysql-test/t/ps.test:
  New error code.
mysql-test/t/ps_1general.test:
  New error code.
sql/sql_lex.cc:
  Move stmt_prepare_mode to Lex_input_stream.
sql/sql_lex.h:
  Move stmt_prepare_mode to class Lex_input_stream
sql/sql_prepare.cc:
  Move stmt_prepare_mode to Lex_input_stream
sql/sql_yacc.yy:
  Remove dead code.

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