fixed alter table - type is not required.

Author: chernser

jdbc-v2/src/main/antlr4/com/clickhouse/jdbc/internal/parser/antlr4/ClickHouseParser.g4

@@ -84,7 +84,7 @@ alterTableClause
     | MODIFY COLUMN (IF EXISTS)? nestedIdentifier COMMENT STRING_LITERAL            # AlterTableClauseModifyComment
     | MODIFY COLUMN (IF EXISTS)? nestedIdentifier REMOVE tableColumnPropertyType    # AlterTableClauseModifyRemove
     | MODIFY COLUMN (IF EXISTS)? tableColumnDfnt                                    # AlterTableClauseModify
-    | ALTER COLUMN (IF EXISTS)? identifier TYPE columnTypeExpr codecExpr? ttlClause? settingExprList? alterTableColumnPosition? # AlterTableClauseAlterType
+    | ALTER COLUMN (IF EXISTS)? identifier TYPE? columnTypeExpr codecExpr? ttlClause? settingExprList? alterTableColumnPosition? # AlterTableClauseAlterType
     | MODIFY ORDER BY columnExpr                                                    # AlterTableClauseModifyOrderBy
     | MODIFY ttlClause                                                              # AlterTableClauseModifyTTL
     | MODIFY COMMENT literal                                                        # AlterTableClauseModifyComment
@@ -662,7 +662,7 @@ exchangeStmt
 // SET statement
 
 setStmt
-    : SET IDENTIFIER EQ_SINGLE literal
+    : SET (identifier | settingExpr)
     ;
 
 // SET ROLE statement

jdbc-v2/src/test/java/com/clickhouse/jdbc/internal/BaseSqlParserFacadeTest.java

@@ -636,6 +636,7 @@ public static Object[][] testStatementWithoutResultSetDP() {
                 {"EXCHANGE DICTIONARIES dict1 AND dict2", 0, false},
                 {"EXCHANGE DICTIONARIES dict1 AND dict2 ON CLUSTER `default`", 0, false},
                 {"SET profile = 'profile-name-from-the-settings-file'", 0, false},
+                {"SET setting_1 = 'some value'", 0, false},
                 {"SET use_some_feature_flag", 0, false},
                 {"SET use_some_feature_flag = 'true'", 0, false},
                 {"SET ROLE role1", 0, false},