Improvement of errors when renaming a RT table

[PavelShilin89]

When we try to rename a table in a mode other than RT, we get no understandable error. It would be nice if the error would indicate that we are using the wrong table type.

MRE

mysql -v -h0 -P9306 -e "CREATE TABLE index1(f text, s string); CREATE TABLE dist_table type='distributed' local='index1'; CREATE TABLE products(title text, meta json) type='pq'; ALTER TABLE dist_table RENAME new_dist_table; ALTER TABLE products RENAME new_products;"
--------------
CREATE TABLE index1(f text, s string)
--------------

--------------
CREATE TABLE dist_table type='distributed' local='index1'
--------------

--------------
CREATE TABLE products(title text, meta json) type='pq'
--------------

--------------
ALTER TABLE dist_table RENAME new_dist_table
--------------
ERROR 1064 (42000) at line 1: Source table dist_table not exists
--------------
ALTER TABLE products RENAME new_products;
--------------
ERROR 1064 (42000) at line 1: Source table products not exists
--------------

[djklim87]

Done in manticoresoftware/manticoresearch-buddy@607e084