content: 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.ast.expr.SQLBinaryOpExpr;
  import com.alibaba.druid.sql.ast.expr.SQLPropertyExpr;
  import com.alibaba.druid.sql.ast.statement.SQLColumnDefinition;
  import com.alibaba.druid.sql.ast.statement.SQLSelectQueryBlock;
  import com.alibaba.druid.sql.ast.statement.SQLSelectStatement;
  import com.alibaba.druid.sql.parser.SQLParserUtils;
  import com.alibaba.druid.sql.parser.SQLStatementParser;
  import com.alibaba.druid.sql.repository.SchemaRepository;
  import com.alibaba.druid.sql.visitor.SchemaStatVisitor;
  import com.alibaba.druid.util.JdbcConstants;
  import junit.framework.TestCase;
  
  public class SchemaStatTest22_yiran extends TestCase {
      public void test_schemaStat() throws Exception {
          SchemaRepository repository = new SchemaRepository(JdbcConstants.MYSQL);
          repository.console("CREATE TABLE DEPT (depno INT4, dname ENC_TEXT)");
  
          String sql = "SELECT * FROM ( SELECT dname FROM DEPT) X WHERE X.dname='cs';";
  //        sql = "SELECT * FROM ( SELECT * FROM DEPT) X WHERE X.dname='cs'";
  
          SQLStatementParser parser = SQLParserUtils.createSQLStatementParser(sql, JdbcConstants.MYSQL);
          SQLStatement stmt = parser.parseStatementList().get(0);
  
          SchemaStatVisitor statVisitor = SQLUtils.createSchemaStatVisitor(repository);
          stmt.accept(statVisitor);
  
          SQLSelectQueryBlock q = ((SQLSelectStatement) stmt).getSelect().getFirstQueryBlock();
          SQLPropertyExpr whereLeft = (SQLPropertyExpr) ((SQLBinaryOpExpr) q.getWhere()).getLeft();
          SQLColumnDefinition resolvedColumn = whereLeft.getResolvedColumn();
          assertNotNull(resolvedColumn);
  
          System.out.println("Tables : " + statVisitor.getTables());
          System.out.println("columns : " + statVisitor.getColumns());
  //        System.out.println(statVisitor.getGroupByColumns()); // group by
          System.out.println("relationships : " + statVisitor.getRelationships()); // group by
          System.out.println("conditions : " + statVisitor.getConditions());
  
          assertEquals(1, statVisitor.getColumns().size());
          assertEquals(1, statVisitor.getConditions().size());
          assertEquals(0, statVisitor.getFunctions().size());
      }
  }
  