public void execute()

in baremaps-calcite/src/main/java/org/apache/baremaps/calcite/BaremapsDdlExecutor.java [446:559]


  public void execute(SqlCreateTable create,
      CalcitePrepare.Context context) {
    final SchemaInfo schemaInfo =
        schema(context, true, create.name);
    requireNonNull(schemaInfo.schema()); // TODO: should not assume parent schema exists
    final JavaTypeFactory typeFactory = context.getTypeFactory();
    final RelDataType queryRowType;

    // Process WITH options if present
    Map<String, String> withOptions = processWithOptions(create.withOptions);

    if (create.query != null) {
      // A bit of a hack: pretend it's a view, to get its row type
      final String sql =
          create.query.toSqlString(CalciteSqlDialect.DEFAULT).getSql();
      final ViewTableMacro viewTableMacro =
          ViewTable.viewMacro(schemaInfo.schema().plus(), sql, schemaInfo.schema().path(null),
              context.getObjectPath(), false);
      final TranslatableTable x = viewTableMacro.apply(ImmutableList.of());
      queryRowType = x.getRowType(typeFactory);

      if (create.columnList != null
          && queryRowType.getFieldCount() != create.columnList.size()) {
        throw SqlUtil.newContextException(
            create.columnList.getParserPosition(),
            RESOURCE.columnCountMismatch());
      }
    } else {
      queryRowType = null;
    }
    final List<SqlNode> columnList;
    if (create.columnList != null) {
      columnList = create.columnList;
    } else {
      if (queryRowType == null) {
        // "CREATE TABLE t" is invalid; because there is no "AS query" we need
        // a list of column names and types, "CREATE TABLE t (INT c)".
        throw SqlUtil.newContextException(create.name.getParserPosition(),
            RESOURCE.createTableRequiresColumnList());
      }
      columnList = new ArrayList<>();
      for (String name : queryRowType.getFieldNames()) {
        columnList.add(new SqlIdentifier(name, SqlParserPos.ZERO));
      }
    }
    final ImmutableList.Builder<ColumnDef> b = ImmutableList.builder();
    final RelDataTypeFactory.Builder builder = typeFactory.builder();
    final RelDataTypeFactory.Builder storedBuilder = typeFactory.builder();
    // REVIEW 2019-08-19 Danny Chan: Should we implement the
    // #validate(SqlValidator) to get the SqlValidator instance?
    final SqlValidator validator = validator(context, true);
    for (Ord<SqlNode> c : Ord.zip(columnList)) {
      if (c.e instanceof SqlColumnDeclaration) {
        final SqlColumnDeclaration d = (SqlColumnDeclaration) c.e;
        final RelDataType type = d.dataType.deriveType(validator, true);
        builder.add(d.name.getSimple(), type);
        if (d.strategy != ColumnStrategy.VIRTUAL) {
          storedBuilder.add(d.name.getSimple(), type);
        }
        b.add(ColumnDef.of(d.expression, type, d.strategy));
      } else if (c.e instanceof SqlIdentifier) {
        final SqlIdentifier id = (SqlIdentifier) c.e;
        if (queryRowType == null) {
          throw SqlUtil.newContextException(id.getParserPosition(),
              RESOURCE.createTableRequiresColumnTypes(id.getSimple()));
        }
        final RelDataTypeField f = queryRowType.getFieldList().get(c.i);
        final ColumnStrategy strategy = f.getType().isNullable()
            ? ColumnStrategy.NULLABLE
            : ColumnStrategy.NOT_NULLABLE;
        b.add(ColumnDef.of(c.e, f.getType(), strategy));
        builder.add(id.getSimple(), f.getType());
        storedBuilder.add(id.getSimple(), f.getType());
      } else {
        throw new AssertionError(c.e.getClass());
      }
    }
    final RelDataType rowType = builder.build();
    if (schemaInfo.schema().plus().getTable(schemaInfo.name()) != null) {
      // Table exists.
      if (create.ifNotExists) {
        return;
      }
      if (!create.getReplace()) {
        // They did not specify IF NOT EXISTS, so give error.
        throw SqlUtil.newContextException(create.name.getParserPosition(),
            RESOURCE.tableExists(schemaInfo.name()));
      }
    }

    // Create the operand map for the table
    Map<String, Object> operand = new HashMap<>();
    operand.put("format", withOptions.computeIfAbsent("format", k -> "data"));
    operand.put("file", withOptions.computeIfAbsent("file", k -> {
      try {
        Path file = Files.createTempDirectory("baremaps_");
        return file.toString();
      } catch (IOException e) {
        throw new RuntimeException(e);
      }
    }));

    // Create the table using BaremapsTableFactory
    BaremapsTableFactory tableFactory = new BaremapsTableFactory();
    Table table =
        tableFactory.create(schemaInfo.schema().plus(), schemaInfo.name(), operand, rowType);

    // Add the table to the schema
    schemaInfo.schema().add(schemaInfo.name(), table);

    if (create.query != null) {
      populate(create.name, create.query, context);
    }
  }