content: package com.alibaba.druid.bvt.sql.postgresql.issues;
  
  import com.alibaba.druid.DbType;
  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.stat.TableStat;
  import com.alibaba.druid.wall.WallUtils;
  import org.junit.Test;
  
  import java.util.Map;
  
  import static org.junit.Assert.assertFalse;
  import static org.junit.Assert.assertTrue;
  
  public class Issue4442 {
      @Test
      public void test_idle2() throws Exception {
          String sql = "INSERT INTO users (id, level)\n" +
                  "VALUES (1, 0)\n" +
                  "ON CONFLICT (id) DO UPDATE\n" +
                  "SET level = users.level + 1;";
          SQLStatementParser parser = SQLParserUtils.createSQLStatementParser(sql, DbType.postgresql);
          SQLStatement statement = parser.parseStatement();
          SchemaStatVisitor visitor = SQLUtils.createSchemaStatVisitor(DbType.postgresql);
          statement.accept(visitor);
          Map<TableStat.Name, TableStat> tableMap = visitor.getTables();
          assertFalse(tableMap.isEmpty());
          assertTrue(WallUtils.isValidatePostgres(sql));
      }
  }
  