private Type extractTypeFromBigQueryTableField()

in zetasql-toolkit-bigquery/src/main/java/com/google/zetasql/toolkit/catalog/bigquery/BigQueryAPIResourceProvider.java [151:176]

• 22 lines of code
• 3 McCabe index (conditional complexity)

  private Type extractTypeFromBigQueryTableField(Field field) {
    Type fieldType;
    StandardSQLTypeName type = field.getType().getStandardType();
    Field.Mode mode = Optional.ofNullable(field.getMode()).orElse(Field.Mode.NULLABLE);

    if (type.equals(StandardSQLTypeName.STRUCT)) {
      List<StructField> fields =
          field.getSubFields().stream()
              .map(
                  subField -> {
                    Type recordFieldType = this.extractTypeFromBigQueryTableField(subField);
                    return new StructField(subField.getName(), recordFieldType);
                  })
              .collect(Collectors.toList());

      fieldType = TypeFactory.createStructType(fields);
    } else {
      fieldType = TypeFactory.createSimpleType(this.convertBigqueryTypeNameToTypeKind(type));
    }

    if (mode.equals(Field.Mode.REPEATED)) {
      return TypeFactory.createArrayType(fieldType);
    }

    return fieldType;
  }