bug fixed for oracle sql parser schemastat visitor

src/test/java/com/alibaba/druid/bvt/sql/schemaStat/SchemaStatTest8.java

@@ -0,0 +1,36 @@
+package com.alibaba.druid.bvt.sql.schemaStat;
+
+import com.alibaba.druid.sql.SQLUtils;
+import com.alibaba.druid.sql.ast.SQLStatement;
+import com.alibaba.druid.sql.parser.SQLParserUtils;
+import com.alibaba.druid.sql.parser.SQLStatementParser;
+import com.alibaba.druid.sql.visitor.SchemaStatVisitor;
+import com.alibaba.druid.util.JdbcConstants;
+import junit.framework.TestCase;
+import org.junit.Assert;
+
+public class SchemaStatTest8 extends TestCase {
+
+    public void test_schemaStat() throws Exception {
+        String sql = "SELECT * FROM AQLQCAT " +
+                "JOIN AQLQCATB " +
+                "   ON AQLQCAT.ZZ = AQLQCATB.RR " +
+                "       AND trim(AQLQCAT.BB) = AQLQCATB.DD " +
+                "WHERE AQLQCAT.MANDT = 'A0' " +
+                "   AND AQLQCATB.NUM = 'A1'";
+
+        String dbType = JdbcConstants.ORACLE;
+        SQLStatementParser parser = SQLParserUtils.createSQLStatementParser(sql, dbType);
+        SQLStatement stmt = parser.parseStatementList().get(0);
+
+        SchemaStatVisitor statVisitor = SQLUtils.createSchemaStatVisitor(dbType);
+        stmt.accept(statVisitor);
+
+//        System.out.println(statVisitor.getColumns());
+//        System.out.println(statVisitor.getGroupByColumns()); // group by
+        System.out.println("relationships : " + statVisitor.getRelationships()); // group by
+
+        Assert.assertEquals(6, statVisitor.getColumns().size());
+        Assert.assertEquals(6, statVisitor.getConditions().size());
+    }
+}