MDEV-27906 CREATE TABLE/DATABASE .. CHARSET .. COLLATE is not consistent on errors

This problem was fixed earlier by the patch for:
    MDEV-27896 Wrong result upon COLLATE .. CHARACTER SET .. on the table or the database level

Adding MTR tests only.

mysql-test/main/ctype_collate_database.result

@@ -109,3 +109,22 @@ DROP VIEW cscl;
 #
 CREATE DATABASE db1 COLLATE latin1_swedish_ci COLLATE latin1_bin;
 ERROR HY000: Conflicting declarations: 'COLLATE latin1_swedish_ci' and 'COLLATE latin1_bin'
+#
+# MDEV-27906 CREATE TABLE/DATABASE .. CHARSET .. COLLATE is not consistent on errors
+#
+SET collation_server=utf8mb4_unicode_ci;
+CREATE DATABASE db1 COLLATE latin1_bin CHARACTER SET DEFAULT;
+ERROR 42000: COLLATION 'latin1_bin' is not valid for CHARACTER SET 'utf8mb4'
+CREATE DATABASE db1 CHARACTER SET DEFAULT COLLATE latin1_bin;
+ERROR 42000: COLLATION 'latin1_bin' is not valid for CHARACTER SET 'utf8mb4'
+SET collation_server=DEFAULT;
+CREATE DATABASE db1 COLLATE latin1_bin CHARACTER SET DEFAULT;
+SHOW CREATE DATABASE db1;
+Database	Create Database
+db1	CREATE DATABASE `db1` /*!40100 DEFAULT CHARACTER SET latin1 COLLATE latin1_bin */
+DROP DATABASE db1;
+CREATE DATABASE db1 CHARACTER SET DEFAULT COLLATE latin1_bin;
+SHOW CREATE DATABASE db1;
+Database	Create Database
+db1	CREATE DATABASE `db1` /*!40100 DEFAULT CHARACTER SET latin1 COLLATE latin1_bin */
+DROP DATABASE db1;

mysql-test/main/ctype_collate_database.test

@@ -102,3 +102,23 @@ DROP VIEW cscl;
 
 --error ER_CONFLICTING_DECLARATIONS
 CREATE DATABASE db1 COLLATE latin1_swedish_ci COLLATE latin1_bin;
+
+
+--echo #
+--echo # MDEV-27906 CREATE TABLE/DATABASE .. CHARSET .. COLLATE is not consistent on errors
+--echo #
+
+SET collation_server=utf8mb4_unicode_ci;
+--error ER_COLLATION_CHARSET_MISMATCH
+CREATE DATABASE db1 COLLATE latin1_bin CHARACTER SET DEFAULT;
+--error ER_COLLATION_CHARSET_MISMATCH
+CREATE DATABASE db1 CHARACTER SET DEFAULT COLLATE latin1_bin;
+SET collation_server=DEFAULT;
+
+CREATE DATABASE db1 COLLATE latin1_bin CHARACTER SET DEFAULT;
+SHOW CREATE DATABASE db1;
+DROP DATABASE db1;
+
+CREATE DATABASE db1 CHARACTER SET DEFAULT COLLATE latin1_bin;
+SHOW CREATE DATABASE db1;
+DROP DATABASE db1;

mysql-test/main/ctype_collate_table.result

@@ -30,3 +30,28 @@ DROP TABLE t1;
 #
 CREATE TABLE t1 (a CHAR(10)) COLLATE latin1_swedish_ci COLLATE latin1_bin;
 ERROR HY000: Conflicting declarations: 'COLLATE latin1_swedish_ci' and 'COLLATE latin1_bin'
+#
+# MDEV-27906 CREATE TABLE/DATABASE .. CHARSET .. COLLATE is not consistent on errors
+#
+CREATE DATABASE db1 CHARACTER SET utf8mb4;
+USE db1;
+CREATE TABLE t1 (a CHAR) COLLATE latin1_bin CHARACTER SET DEFAULT;
+ERROR 42000: COLLATION 'latin1_bin' is not valid for CHARACTER SET 'utf8mb4'
+CREATE TABLE t1 (a CHAR) CHARACTER SET DEFAULT COLLATE latin1_bin;
+ERROR 42000: COLLATION 'latin1_bin' is not valid for CHARACTER SET 'utf8mb4'
+DROP DATABASE db1;
+USE test;
+CREATE TABLE t1 (a CHAR) COLLATE latin1_bin CHARACTER SET DEFAULT;
+SHOW CREATE TABLE t1;
+Table	Create Table
+t1	CREATE TABLE `t1` (
+  `a` char(1) COLLATE latin1_bin DEFAULT NULL
+) ENGINE=MyISAM DEFAULT CHARSET=latin1 COLLATE=latin1_bin
+DROP TABLE t1;
+CREATE TABLE t1 (a CHAR) CHARACTER SET DEFAULT COLLATE latin1_bin;
+SHOW CREATE TABLE t1;
+Table	Create Table
+t1	CREATE TABLE `t1` (
+  `a` char(1) COLLATE latin1_bin DEFAULT NULL
+) ENGINE=MyISAM DEFAULT CHARSET=latin1 COLLATE=latin1_bin
+DROP TABLE t1;

mysql-test/main/ctype_collate_table.test

@@ -27,3 +27,25 @@ DROP TABLE t1;
 
 --error ER_CONFLICTING_DECLARATIONS
 CREATE TABLE t1 (a CHAR(10)) COLLATE latin1_swedish_ci COLLATE latin1_bin;
+
+
+--echo #
+--echo # MDEV-27906 CREATE TABLE/DATABASE .. CHARSET .. COLLATE is not consistent on errors
+--echo #
+
+CREATE DATABASE db1 CHARACTER SET utf8mb4;
+USE db1;
+--error ER_COLLATION_CHARSET_MISMATCH
+CREATE TABLE t1 (a CHAR) COLLATE latin1_bin CHARACTER SET DEFAULT;
+--error ER_COLLATION_CHARSET_MISMATCH
+CREATE TABLE t1 (a CHAR) CHARACTER SET DEFAULT COLLATE latin1_bin;
+DROP DATABASE db1;
+USE test;
+
+CREATE TABLE t1 (a CHAR) COLLATE latin1_bin CHARACTER SET DEFAULT;
+SHOW CREATE TABLE t1;
+DROP TABLE t1;
+
+CREATE TABLE t1 (a CHAR) CHARACTER SET DEFAULT COLLATE latin1_bin;
+SHOW CREATE TABLE t1;
+DROP TABLE t1;