[SPARK-29680][SQL] Remove ALTER TABLE CHANGE COLUMN syntax

sql/catalyst/src/main/antlr4/org/apache/spark/sql/catalyst/parser/SqlBase.g4

@@ -151,9 +151,6 @@ statement
     | ALTER TABLE multipartIdentifier
         (ALTER | CHANGE) COLUMN? qualifiedName
         (TYPE dataType)? (COMMENT comment=STRING)? colPosition?        #alterTableColumn
-    | ALTER TABLE tableIdentifier partitionSpec?
-        CHANGE COLUMN?
-        colName=errorCapturingIdentifier colType colPosition?          #changeColumn
     | ALTER TABLE tableIdentifier (partitionSpec)?
         SET SERDE STRING (WITH SERDEPROPERTIES tablePropertyList)?     #setTableSerDe
     | ALTER TABLE tableIdentifier (partitionSpec)?

sql/core/src/main/scala/org/apache/spark/sql/execution/SparkSqlParser.scala

@@ -426,33 +426,6 @@ class SparkSqlAstBuilder(conf: SQLConf) extends AstBuilder(conf) {
       Option(ctx.partitionSpec).map(visitNonOptionalPartitionSpec))
   }
 
-  /**
-   * Create a [[AlterTableChangeColumnCommand]] command.
-   *
-   * For example:
-   * {{{
-   *   ALTER TABLE table [PARTITION partition_spec]
-   *   CHANGE [COLUMN] column_old_name column_new_name column_dataType [COMMENT column_comment]
-   *   [FIRST | AFTER column_name];
-   * }}}
-   */
-  override def visitChangeColumn(ctx: ChangeColumnContext): LogicalPlan = withOrigin(ctx) {
-    if (ctx.partitionSpec != null) {
-      operationNotAllowed("ALTER TABLE table PARTITION partition_spec CHANGE COLUMN", ctx)
-    }
-
-    if (ctx.colPosition != null) {
-      operationNotAllowed(
-        "ALTER TABLE table [PARTITION partition_spec] CHANGE COLUMN ... FIRST | AFTER otherCol",
-        ctx)
-    }
-
-    AlterTableChangeColumnCommand(
-      tableName = visitTableIdentifier(ctx.tableIdentifier),
-      columnName = ctx.colName.getText,
-      newColumn = visitColType(ctx.colType))
-  }
-
   /**
    * Convert a nested constants list into a sequence of string sequences.
    */

sql/core/src/test/resources/sql-tests/inputs/change-column.sql

@@ -2,56 +2,43 @@
 CREATE TABLE test_change(a INT, b STRING, c INT) using parquet;
 DESC test_change;
 
--- Change column name (not supported yet)
-ALTER TABLE test_change CHANGE a a1 INT;
+-- ALTER TABLE CHANGE COLUMN must change either type or comment
+ALTER TABLE test_change CHANGE a;
+DESC test_change;
+
+-- Change column name (not supported on v1 table)
+ALTER TABLE test_change RENAME COLUMN a TO a1;
 DESC test_change;
 
 -- Change column dataType (not supported yet)
-ALTER TABLE test_change CHANGE a a STRING;
+ALTER TABLE test_change CHANGE a TYPE STRING;
 DESC test_change;
 
 -- Change column position (not supported yet)
-ALTER TABLE test_change CHANGE a a INT AFTER b;
-ALTER TABLE test_change CHANGE b b STRING FIRST;
+ALTER TABLE test_change CHANGE a TYPE INT AFTER b;
+ALTER TABLE test_change CHANGE b TYPE STRING FIRST;
 DESC test_change;
 
 -- Change column comment
-ALTER TABLE test_change CHANGE a a INT COMMENT 'this is column a';
-ALTER TABLE test_change CHANGE b b STRING COMMENT '#*02?`';
-ALTER TABLE test_change CHANGE c c INT COMMENT '';
+ALTER TABLE test_change CHANGE a TYPE INT COMMENT 'this is column a';
+ALTER TABLE test_change CHANGE b TYPE STRING COMMENT '#*02?`';
+ALTER TABLE test_change CHANGE c TYPE INT COMMENT '';
 DESC test_change;
 
 -- Don't change anything.
-ALTER TABLE test_change CHANGE a a INT COMMENT 'this is column a';
+ALTER TABLE test_change CHANGE a TYPE INT COMMENT 'this is column a';
 DESC test_change;
 
 -- Change a invalid column
-ALTER TABLE test_change CHANGE invalid_col invalid_col INT;
-DESC test_change;
-
--- Change column name/dataType/position/comment together (not supported yet)
-ALTER TABLE test_change CHANGE a a1 STRING COMMENT 'this is column a1' AFTER b;
-DESC test_change;
-
--- Check the behavior with different values of CASE_SENSITIVE
-SET spark.sql.caseSensitive=false;
-ALTER TABLE test_change CHANGE a A INT COMMENT 'this is column A';
-SET spark.sql.caseSensitive=true;
-ALTER TABLE test_change CHANGE a A INT COMMENT 'this is column A1';
+ALTER TABLE test_change CHANGE invalid_col TYPE INT;
 DESC test_change;
 
 -- Change column can't apply to a temporary/global_temporary view
 CREATE TEMPORARY VIEW temp_view(a, b) AS SELECT 1, "one";
-ALTER TABLE temp_view CHANGE a a INT COMMENT 'this is column a';
+ALTER TABLE temp_view CHANGE a TYPE INT COMMENT 'this is column a';
 CREATE GLOBAL TEMPORARY VIEW global_temp_view(a, b) AS SELECT 1, "one";
-ALTER TABLE global_temp.global_temp_view CHANGE a a INT COMMENT 'this is column a';
-
--- Change column in partition spec (not supported yet)
-CREATE TABLE partition_table(a INT, b STRING, c INT, d STRING) USING parquet PARTITIONED BY (c, d);
-ALTER TABLE partition_table PARTITION (c = 1) CHANGE COLUMN a new_a INT;
-ALTER TABLE partition_table CHANGE COLUMN c c INT COMMENT 'this is column C';
+ALTER TABLE global_temp.global_temp_view CHANGE a TYPE INT COMMENT 'this is column a';
 
 -- DROP TEST TABLE
 DROP TABLE test_change;
-DROP TABLE partition_table;
 DROP VIEW global_temp.global_temp_view;