[Fix](planner)fix bug of char(255) toSql

fe/fe-common/src/main/java/org/apache/doris/catalog/ScalarType.java

@@ -579,7 +579,7 @@ public static ScalarType createHllType() {
     public String toString() {
         if (type == PrimitiveType.CHAR) {
             if (isWildcardChar()) {
-                return "CHARACTER";
+                return "CHARACTER(" + MAX_CHAR_LENGTH + ")";
             }
             return "CHAR(" + len + ")";
         } else  if (type == PrimitiveType.DECIMALV2) {
@@ -617,7 +617,7 @@ public String toSql(int depth) {
         switch (type) {
             case CHAR:
                 if (isWildcardChar()) {
-                    stringBuilder.append("CHARACTER");
+                    stringBuilder.append("CHARACTER").append("(").append(MAX_CHAR_LENGTH).append(")");
                 } else if (Strings.isNullOrEmpty(lenStr)) {
                     stringBuilder.append("CHAR").append("(").append(len).append(")");
                 } else {

fe/fe-core/src/test/java/org/apache/doris/catalog/CreateFunctionTest.java

@@ -295,7 +295,7 @@ public void testCreateGlobalFunction() throws Exception {
 
         queryStr = "select to_char(k1, 4) from db2.tbl1;";
         Assert.assertTrue(containsIgnoreCase(dorisAssert.query(queryStr).explainQuery(),
-                "CAST(`k1` AS CHARACTER)"));
+                "CAST(`k1` AS CHARACTER(255))"));
     }
 
     private void testFunctionQuery(ConnectContext ctx, String queryStr, Boolean isStringLiteral) throws Exception {

regression-test/data/ddl_p0/test_create_table_like_nereids.out

@@ -18,3 +18,9 @@
 6	\N	6
 6	7	1
 
+-- !test_char_255 --
+0
+
+-- !select --
+123	abcdddddd
+

regression-test/data/schema_change_p0/modify_col_type_dup/schema_change_modify_mv_column_type.out

@@ -34,7 +34,7 @@ mv_tbl_scalar_types_dup_1	DUP_KEYS	mv_c_tinyint	TINYINT	TINYINT	Yes	true	\N		tru
 		mv_c_datetime	DATETIME	DATETIMEV2(0)	Yes	false	\N	NONE	true	`c_datetime`	
 		mv_c_datev2	DATE	DATEV2	Yes	false	\N	NONE	true	`c_datev2`	
 		mv_c_datetimev2	DATETIME	DATETIMEV2(0)	Yes	false	\N	NONE	true	`c_datetimev2`	
-		mv_c_char	CHARACTER	CHARACTER	Yes	false	\N	NONE	true	`c_char`	
+		mv_c_char	CHARACTER(255)	CHARACTER(255)	Yes	false	\N	NONE	true	`c_char`	
 		mv_c_varchar	VARCHAR(65533)	VARCHAR(65533)	Yes	false	\N	NONE	true	`c_varchar`	
 		mv_c_string	TEXT	TEXT	Yes	false	\N	NONE	true	`c_string`	
 
@@ -97,7 +97,7 @@ mv_tbl_scalar_types_dup_1	DUP_KEYS	mv_c_tinyint	TINYINT	TINYINT	Yes	true	\N		tru
 		mv_c_datetime	DATETIME	DATETIMEV2(0)	Yes	false	\N	NONE	true	`c_datetime`	
 		mv_c_datev2	DATE	DATEV2	Yes	false	\N	NONE	true	`c_datev2`	
 		mv_c_datetimev2	DATETIME	DATETIMEV2(0)	Yes	false	\N	NONE	true	`c_datetimev2`	
-		mv_c_char	CHARACTER	CHARACTER	Yes	false	\N	NONE	true	`c_char`	
+		mv_c_char	CHARACTER(255)	CHARACTER(255)	Yes	false	\N	NONE	true	`c_char`	
 		mv_c_varchar	VARCHAR(65533)	VARCHAR(65533)	Yes	false	\N	NONE	true	`c_varchar`	
 		mv_c_string	TEXT	TEXT	Yes	false	\N	NONE	true	`c_string`	
 

regression-test/suites/ddl_p0/test_create_table_like_nereids.groovy

@@ -74,4 +74,28 @@ suite("test_create_table_like_nereids") {
     sql "drop table if exists table_like_with_partial_roll_up_exists"
     sql """CREATE TABLE if not exists table_like_with_partial_roll_up_exists
     LIKE mal_test_create_table_like with rollup (ru1);"""
+
+    sql "drop table if exists test_create_table_like_char_255"
+    sql """
+        CREATE TABLE test_create_table_like_char_255
+        (
+        `id` INT NOT NULL,
+        `name` CHAR(255)
+        )
+        UNIQUE KEY(`id`)
+        DISTRIBUTED BY HASH(`id`) BUCKETS AUTO
+        PROPERTIES (
+        "replication_num" = "1",
+        "light_schema_change" = "true"
+        );
+    """
+    sql "drop table if exists new_char_255"
+    qt_test_char_255 """
+        create table new_char_255 like test_create_table_like_char_255;
+    """
+    def res1 = sql "show create table new_char_255"
+    mustContain(res1[0][1], "CHARACTER(255)")
+
+    sql "insert into new_char_255 values(123,'abcdddddd')"
+    qt_select "select * from new_char_255"
 }