improved clickhouse support, fix #4043

src/main/java/com/alibaba/druid/sql/parser/SQLExprParser.java

@@ -1116,7 +1116,7 @@ public class SQLExprParser extends SQLParser {
                 }
                 throw new ParserException("ERROR. " + lexer.info());
             case LBRACKET:
-                if (dbType == DbType.odps) {
+                if (dbType == DbType.odps || dbType == DbType.clickhouse) {
                     SQLArrayExpr array = new SQLArrayExpr();
                     lexer.nextToken();
                     this.exprList(array.getValues(), array);

src/main/java/com/alibaba/druid/sql/visitor/SchemaStatVisitor.java

@@ -2476,7 +2476,9 @@ public class SchemaStatVisitor extends SQLASTVisitorAdapter {
                 return false;
             }
         }
-        exp.accept(this);
+        if (exp != null) {
+            exp.accept(this);
+        }
         return false;
     }
     

src/test/java/com/alibaba/druid/bvt/sql/clickhouse/ClickHouseResourceTest.java

@@ -40,6 +40,10 @@ public class ClickHouseResourceTest extends OracleTest {
         exec_test("bvt/parser/clickhouse-0.txt");
     }
 
+    public void test_1() throws Exception {
+        exec_test("bvt/parser/clickhouse-1.txt");
+    }
+
     public void exec_test(String resource) throws Exception {
         System.out.println(resource);
         InputStream is = null;

src/test/resources/bvt/parser/clickhouse-1.txt

@@ -0,0 +1,12 @@
+select * from data_all dsa where dsa.sign='1' and dsa.number in ( select DISTINCT number
+from dc_clients do
+where hasAny(splitByString(',',cast(do.df_time as String)),[?,?])=1 )
+---------------------------
+SELECT *
+FROM data_all dsa
+WHERE dsa.sign = '1'
+	AND dsa.number IN (
+		SELECT DISTINCT number
+		FROM dc_clients do
+		WHERE hasAny(splitByString(',', CAST(do.df_time AS String)), [?, ?]) = 1
+	)