Fix SHOW CREATE VIEW to handle ANSI_QUOTES mode. (Bug #6903)

mysql-test/r/sql_mode.result:
  Update results
mysql-test/r/view.result:
  Update results
mysql-test/t/sql_mode.test:
  Add new regression tests
sql/sql_show.cc:
  Fix SHOW CREATE VIEW to honor ANSI_QUOTES mode.

mysql-test/r/sql_mode.result

@@ -402,4 +402,41 @@ a\b	a\"b	a'\b	a'\"b
 SELECT "a\\b", "a\\\'b", "a""\\b", "a""\\\'b";
 a\b	a\'b	a"\b	a"\'b
 a\b	a\'b	a"\b	a"\'b
+SET @@SQL_MODE='';
+create function `foo` () returns int return 5;
+show create function `foo`;
+Function	sql_mode	Create Function
+foo		CREATE FUNCTION `test`.`foo`() RETURNS int(11)
+return 5
+SET @@SQL_MODE='ANSI_QUOTES';
+show create function `foo`;
+Function	sql_mode	Create Function
+foo		CREATE FUNCTION `test`.`foo`() RETURNS int(11)
+return 5
+drop function `foo`;
+create function `foo` () returns int return 5;
+show create function `foo`;
+Function	sql_mode	Create Function
+foo	ANSI_QUOTES	CREATE FUNCTION "test"."foo"() RETURNS int(11)
+return 5
+SET @@SQL_MODE='';
+show create function `foo`;
+Function	sql_mode	Create Function
+foo	ANSI_QUOTES	CREATE FUNCTION "test"."foo"() RETURNS int(11)
+return 5
+drop function `foo`;
+SET @@SQL_MODE='';
+create table t1 (a int);
+create table t2 (a int);
+create view v1 as select a from t1;
+show create view v1;
+View	Create View
+v1	CREATE ALGORITHM=UNDEFINED VIEW `test`.`v1` AS select `test`.`t1`.`a` AS `a` from `test`.`t1`
+SET @@SQL_MODE='ANSI_QUOTES';
+show create view v1;
+View	Create View
+v1	CREATE ALGORITHM=UNDEFINED VIEW "test"."v1" AS select "test"."t1"."a" AS "a" from "test"."t1"
+create view v2 as select a from t2 where a in (select a from v1);
+drop view v2, v1;
+drop table t1, t2;
 SET @@SQL_MODE=@OLD_SQL_MODE;

mysql-test/r/view.result

@@ -550,7 +550,7 @@ create table t1 ("a*b" int);
 create view v1 as select "a*b" from t1;
 show create view v1;
 View	Create View
-v1	CREATE VIEW "test"."v1" AS select `test`.`t1`.`a*b` AS `a*b` from `test`.`t1`
+v1	CREATE VIEW "test"."v1" AS select "test"."t1"."a*b" AS "a*b" from "test"."t1"
 drop view v1;
 drop table t1;
 set sql_mode=default;
@@ -760,7 +760,7 @@ a	b
 1	1
 show create view v3;
 View	Create View
-v3	CREATE ALGORITHM=UNDEFINED VIEW `test`.`v3` AS select `v1`.`col1` AS `a`,`v2`.`col1` AS `b` from `test`.`v1` join `test`.`v2` where (`v1`.`col1` = `v2`.`col1`)
+v3	CREATE ALGORITHM=UNDEFINED VIEW `test`.`v3` AS select `v1`.`col1` AS `a`,`v2`.`col1` AS `b` from (`test`.`v1` join `test`.`v2`) where (`v1`.`col1` = `v2`.`col1`)
 drop view v3, v2, v1;
 drop table t2, t1;
 create function `f``1` () returns int return 5;

mysql-test/t/sql_mode.test

@@ -189,4 +189,38 @@ SET @@SQL_MODE='';
 SELECT 'a\\b', 'a\\\"b', 'a''\\b', 'a''\\\"b';
 SELECT "a\\b", "a\\\'b", "a""\\b", "a""\\\'b";
 
+#
+# Bug #6903: ANSI_QUOTES does not come into play with SHOW CREATE FUNCTION
+# or PROCEDURE because it displays the SQL_MODE used to create the routine.
+#
+SET @@SQL_MODE='';
+create function `foo` () returns int return 5;
+show create function `foo`;
+SET @@SQL_MODE='ANSI_QUOTES';
+show create function `foo`;
+drop function `foo`;
+
+create function `foo` () returns int return 5;
+show create function `foo`;
+SET @@SQL_MODE='';
+show create function `foo`;
+drop function `foo`;
+
+# 
+# Bug #6903: ANSI_QUOTES should have effect for SHOW CREATE VIEW (Bug #6903)
+#
+SET @@SQL_MODE='';
+create table t1 (a int);
+create table t2 (a int);
+create view v1 as select a from t1;
+show create view v1;
+SET @@SQL_MODE='ANSI_QUOTES';
+show create view v1;
+# Test a view with a subselect, which will get shown incorrectly without
+# thd->lex->view_prepare_mode set properly.
+create view v2 as select a from t2 where a in (select a from v1);
+drop view v2, v1;
+drop table t1, t2;
+
+
 SET @@SQL_MODE=@OLD_SQL_MODE;

sql/sql_show.cc

@@ -347,6 +347,9 @@ mysqld_show_create(THD *thd, TABLE_LIST *table_list)
   DBUG_PRINT("enter",("db: %s  table: %s",table_list->db,
                       table_list->table_name));
 
+  /* We want to preserve the tree for views. */
+  thd->lex->view_prepare_mode= TRUE;
+
   /* Only one table for now, but VIEW can involve several tables */
   if (open_normal_and_derived_tables(thd, table_list))
   {
@@ -1061,7 +1064,13 @@ view_store_create_info(THD *thd, TABLE_LIST *table, String *buff)
   buff->append('.');
   append_identifier(thd, buff, table->view_name.str, table->view_name.length);
   buff->append(" AS ", 4);
-  buff->append(table->query.str, table->query.length);
+
+  /*
+    We can't just use table->query, because our SQL_MODE may trigger
+    a different syntax, like when ANSI_QUOTES is defined.
+  */
+  table->view->unit.print(buff);
+
   if (table->with_check != VIEW_CHECK_NONE)
   {
     if (table->with_check == VIEW_CHECK_LOCAL)