}

  static boolean equalsImpl(Table<?, ?, ?> table, @Nullable Object obj) {
    if (obj == table) {
      return true;
    } else if (obj instanceof Table) {
      Table<?, ?, ?> that = (Table<?, ?, ?>) obj;
      return table.cellSet().equals(that.cellSet());
    } else {
      return false;
    }
  }

  /**
   * Copies all mappings from the specified table to this table. The effect is equivalent to calling
   * {@link #put} with each row key / column key / value mapping in {@code table}.
   *
   * @param table the table to add to this table
   */
  void putAll(Table<? extends R, ? extends C, ? extends V> table);

  /**
   * Removes the mapping, if any, associated with the given keys.
   *

    eraseAll();
  }

  private ArrayTable(Table<R, C, ? extends @Nullable V> table) {
    this(table.rowKeySet(), table.columnKeySet());
    putAll(table);
  }

  private ArrayTable(ArrayTable<R, C, V> table) {
    rowList = table.rowList;
    columnList = table.columnList;
    rowKeyToIndex = table.rowKeyToIndex;
    columnKeyToIndex = table.columnKeyToIndex;
    @SuppressWarnings("unchecked")

    table = create("foo", 1, 'a', "bar", 1, 'b', "foo", 3, 'c');
    Table<String, Integer, Character> other = HashBasedTable.create();
    other.put("foo", 1, 'd');
    other.put("bar", 2, 'e');
    other.put("cat", 2, 'f');
    assertThrows(UnsupportedOperationException.class, () -> table.putAll(other));
    assertEquals((Character) 'a', table.get("foo", 1));
    assertEquals((Character) 'b', table.get("bar", 1));

  private static void populateForRowKeySet(
      Table<String, Integer, Character> table, String[] elements) {
    for (String row : elements) {
      table.put(row, 1, 'a');
      table.put(row, 2, 'b');
    }
  }

  private static void populateForColumnKeySet(
      Table<Integer, String, Character> table, String[] elements) {
    for (String column : elements) {
      table.put(1, column, 'a');
      table.put(2, column, 'b');

{* ../../docs_src/sql_databases/tutorial001_an_py310.py ln[25:30]  hl[25:27,30] *}

### Create Database Tables on Startup { #create-database-tables-on-startup }

We will create the database tables when the application starts.

{* ../../docs_src/sql_databases/tutorial001_an_py310.py ln[32:37] hl[35:37] *}

Here we create the tables on an application startup event.

func TestCreateFromMapWithTable(t *testing.T) {
	tableDB := DB.Table("users")
	supportLastInsertID := isMysql() || isSqlite()

	// case 1: create from map[string]interface{}
	record := map[string]interface{}{"name": "create_from_map_with_table", "age": 18}
	if err := tableDB.Create(record).Error; err != nil {
		t.Fatalf("failed to create data from map with table, got error: %v", err)
	}

	if _, ok := record["@id"]; !ok && supportLastInsertID {

	if specialTableName != "" {
		tableName = specialTableName
	} else if en, ok := namer.(embeddedNamer); ok {
		tableName = en.Table
	} else if tabler, ok := modelValue.Interface().(Tabler); ok {
		tableName = tabler.TableName()
	} else if tabler, ok := modelValue.Interface().(TablerWithNamer); ok {
		tableName = tabler.TableName(namer)
	} else {
		tableName = namer.TableName(modelType.Name())
	}

	schema := &Schema{

    new EqualsTester()
        .addEqualityGroup(
            entry,
            Tables.<@Nullable Object, @Nullable Object, @Nullable Object>immutableCell(
                null, null, null))
        .addEqualityGroup(
            Tables.<String, @Nullable Object, @Nullable Object>immutableCell("bar", null, null))
        .addEqualityGroup(
            Tables.<@Nullable Object, Integer, @Nullable Object>immutableCell(null, 2, null))

   *
   * @param table the table to copy
   * @throws NullPointerException if any of the row keys, column keys, or values in {@code table} is
   *     null
   */
  public static <R, C, V> HashBasedTable<R, C, V> create(
      Table<? extends R, ? extends C, ? extends V> table) {
    HashBasedTable<R, C, V> result = create();
    result.putAll(table);
    return result;
  }