content: package com.alibaba.druid.bvt.sql.postgresql.issues;
  
  import com.alibaba.druid.DbType;
  import com.alibaba.druid.sql.ast.SQLStatement;
  import com.alibaba.druid.sql.parser.SQLParserUtils;
  import com.alibaba.druid.sql.parser.SQLStatementParser;
  import org.junit.Test;
  
  import java.util.List;
  
  import static org.junit.Assert.assertEquals;
  
  /**
   * @author lizongbo
   * @see <a href="https://github.com/alibaba/druid/issues/5780">Issue来源</a>
   * @see <a href="https://www.postgresql.org/docs/current/sql-altertable.html">ALTER TABLE</a>
   * @see <a href="https://www.postgresql.org/docs/current/sql-createindex.html">CREATE INDEX</a>
   */
  public class Issue5780 {
      @Test
      public void test_parse_alter_table_sql() {
          for (DbType dbType : new DbType[]{DbType.postgresql, DbType.greenplum, DbType.edb}) {
              for (String sql : new String[]{
                  "CREATE INDEX \"index_log\" ON \"public\".\"check_log\" USING btree (\n" +
                      "  \"t_no\" COLLATE \"pg_catalog\".\"default\" \"pg_catalog\".\"text_ops\" ASC NULLS LAST\n" +
                      ");",
                  //"CREATE UNIQUE INDEX title_idx ON films (title);",
                  //"CREATE UNIQUE INDEX title_idx ON films (title) INCLUDE (director, rating);",
  //                "CREATE INDEX title_idx ON films (title) WITH (deduplicate_items = off);",
  //                "CREATE INDEX ON films ((lower(title)));",
  //                "CREATE INDEX title_idx_german ON films (title COLLATE \"de_DE\");",
  //                "CREATE INDEX title_idx_nulls_low ON films (title NULLS FIRST);",
  //                "CREATE UNIQUE INDEX title_idx ON films (title) WITH (fillfactor = 70);",
  //                "CREATE INDEX gin_idx ON documents_table USING GIN (locations) WITH (fastupdate = off);",
  //                "CREATE INDEX code_idx ON films (code) TABLESPACE indexspace;",
  //                "CREATE INDEX pointloc\n"
  //                    + "    ON points USING gist (box(location,location));",
  //                "CREATE INDEX CONCURRENTLY sales_quantity_index ON sales_table (quantity);",
              }) {
                  System.out.println("原始的sql===" + sql);
                  SQLStatementParser parser = SQLParserUtils.createSQLStatementParser(sql, dbType);
                  List<SQLStatement> statementList = parser.parseStatementList();
                  System.out.println("生成的sql===" + statementList);
                  StringBuilder sb = new StringBuilder();
                  for (SQLStatement statement : statementList) {
                      sb.append(statement.toString()).append(";");
                  }
                  sb.deleteCharAt(sb.length() - 1);
                  parser = SQLParserUtils.createSQLStatementParser(sb.toString(), dbType);
                  List<SQLStatement> statementListNew = parser.parseStatementList();
                  System.out.println("重新解析再生成的sql===" + statementListNew);
                  assertEquals(statementList.toString(), statementListNew.toString());
              }
          }
      }
  }
  