MDEV-16792 Assertion `m_status == DA_ERROR' failed in...

MDEV-16792 Assertion `m_status == DA_ERROR' failed in Diagnostics_area::sql_errno or wrong result upon SHOW TABLE STATUS after adding partition under ANSI_QUOTES

if opening a table fails with a syntax error, the error shouldn't
be suppressed completely as if it didn't happen at all.

mysql-test/suite/parts/r/show_create.result

@@ -103,3 +103,15 @@ t_partition	CREATE TABLE `t_partition` (
  PARTITION BY HASH (`f1`)
 PARTITIONS 2
 drop table t_partition;
+create table t1 (a int) partition by range(a) (partition p0 values less than (5));
+set sql_mode='ansi_quotes';
+alter table t1 add partition (partition p1 values less than (10));
+set sql_mode= default;
+show table status;
+Name	Engine	Version	Row_format	Rows	Avg_row_length	Data_length	Max_data_length	Index_length	Data_free	Auto_increment	Create_time	Update_time	Check_time	Collation	Checksum	Create_options	Comment
+t1	NULL	NULL	NULL	NULL	NULL	NULL	NULL	NULL	NULL	NULL	NULL	NULL	NULL	NULL	NULL	NULL	You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near '"p0" VALUES LESS THAN (5) ENGINE = MyISAM,
+ PARTITION "p1" VALUES LESS THAN (10)' at line 2
+Warnings:
+Warning	1064	You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near '"p0" VALUES LESS THAN (5) ENGINE = MyISAM,
+ PARTITION "p1" VALUES LESS THAN (10)' at line 2
+drop table t1;

mysql-test/suite/parts/t/show_create.test

@@ -39,3 +39,13 @@ create table t_partition (f1 int) partition by hash(f1) partitions 2;
 select * from t_partition as tbl;
 show create table t_partition;
 drop table t_partition;
+
+#
+# MDEV-16792 Assertion `m_status == DA_ERROR' failed in Diagnostics_area::sql_errno or wrong result upon SHOW TABLE STATUS after adding partition under ANSI_QUOTES
+#
+create table t1 (a int) partition by range(a) (partition p0 values less than (5));
+set sql_mode='ansi_quotes';
+alter table t1 add partition (partition p1 values less than (10));
+set sql_mode= default;
+show table status;
+drop table t1;

sql/sql_show.cc

@@ -4795,9 +4795,7 @@ class Warnings_only_error_handler : public Internal_error_handler
                         const char* msg,
                         Sql_condition ** cond_hdl)
   {
-    if (sql_errno == ER_PARSE_ERROR ||
-        sql_errno == ER_TRG_NO_DEFINER ||
-        sql_errno == ER_TRG_NO_CREATION_CTX)
+    if (sql_errno == ER_TRG_NO_DEFINER || sql_errno == ER_TRG_NO_CREATION_CTX)
       return true;
 
     if (*level != Sql_condition::WARN_LEVEL_ERROR)