Examples of org.eigenbase.sql2rel.SqlToRelConverter

org.eigenbase.sql2rel.SqlToRelConverter
Converts a SQL parse tree (consisting of {@link org.eigenbase.sql.SqlNode}objects) into a relational algebra expression (consisting of {@link org.eigenbase.rel.RelNode} objects).
The public entry points are: {@link #convertQuery}, {@link #convertExpression(SqlNode)}.

      final CatalogReader catalogReader =
          this.catalogReader.withSchemaPath(schemaPath);
      SqlValidator validator = createSqlValidator(catalogReader);
      SqlNode sqlNode1 = validator.validate(sqlNode);


      SqlToRelConverter sqlToRelConverter =
          getSqlToRelConverter(validator, catalogReader);
      RelNode relNode =
          sqlToRelConverter.convertQuery(sqlNode1, true, false);


      --expansionDepth;
      return relNode;
    }

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      List<OptiqSchema.LatticeEntry> lattices) {
    queryString = sqlQuery.toString();


    init(runtimeContextClass);


    SqlToRelConverter sqlToRelConverter =
        getSqlToRelConverter(validator, catalogReader);


    SqlExplain sqlExplain = null;
    if (sqlQuery.getKind() == SqlKind.EXPLAIN) {
      // dig out the underlying SQL statement
      sqlExplain = (SqlExplain) sqlQuery;
      sqlQuery = sqlExplain.getExplicandum();
      sqlToRelConverter.setIsExplain(sqlExplain.getDynamicParamCount());
    }


    RelNode rootRel =
        sqlToRelConverter.convertQuery(sqlQuery, needsValidation, true);
    Hook.CONVERTED.run(rootRel);


    if (timingTracer != null) {
      timingTracer.traceTime("end sql2rel");
    }

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   *
   * @param rootRel Relational expression that is at the root of the tree
   * @return Trimmed relational expression
   */
  protected RelNode trimUnusedFields(RelNode rootRel) {
    final SqlToRelConverter converter =
        getSqlToRelConverter(
            getSqlValidator(), catalogReader);
    converter.setTrimUnusedFields(shouldTrim(rootRel));
    return converter.trimUnusedFields(rootRel);
  }

View Full Code Here

  }


  public RelNode convert(SqlNode sql) throws RelConversionException {
    ensure(State.STATE_4_VALIDATED);
    assert validatedSqlNode != null;
    final SqlToRelConverter sqlToRelConverter =
        new SqlToRelConverter(
            new ViewExpanderImpl(), validator, createCatalogReader(), planner,
            createRexBuilder(), convertletTable);
    sqlToRelConverter.setTrimUnusedFields(false);
    sqlToRelConverter.enableTableAccessConversion(false);
    rel = sqlToRelConverter.convertQuery(validatedSqlNode, false, true);
    rel = sqlToRelConverter.flattenTypes(rel, true);
    rel = RelDecorrelator.decorrelateQuery(rel);
    state = State.STATE_5_CONVERTED;
    return rel;
  }

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          createCatalogReader().withSchemaPath(schemaPath);
      final SqlValidator validator = new OptiqSqlValidator(operatorTable,
          catalogReader, typeFactory);
      final SqlNode validatedSqlNode = validator.validate(sqlNode);


      final SqlToRelConverter sqlToRelConverter = new SqlToRelConverter(
          null, validator, catalogReader, planner,
          createRexBuilder(), convertletTable);
      sqlToRelConverter.setTrimUnusedFields(false);


      return sqlToRelConverter.convertQuery(validatedSqlNode, true, false);
    }

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