static ImmutableList getFilterColumns()

in calcite-adapter/src/main/java/software/amazon/documentdb/jdbc/calcite/adapter/DocumentDbJoin.java [354:371]

• 14 lines of code
• 8 McCabe index (conditional complexity)

    static ImmutableList<DocumentDbSchemaColumn> getFilterColumns(
            final DocumentDbSchemaTable table) {
        // We don't need to check for
        // 1. primary keys,
        // 2. foreign keys (from another table)
        // 3. columns that are "virtual" (i.e. arrays, structures)
        final List<DocumentDbSchemaColumn> columns =  table.getColumnMap().values().stream()
                .filter(c -> !c.isPrimaryKey()
                        && c.getForeignKeyTableName() == null
                        && !(c instanceof DocumentDbMetadataColumn &&
                        ((DocumentDbMetadataColumn)c).isGenerated())
                        && !(c.getSqlType() == null ||
                        c.getSqlType() == JdbcType.ARRAY ||
                        c.getSqlType() == JdbcType.JAVA_OBJECT ||
                        c.getSqlType() == JdbcType.NULL))
                .collect(Collectors.toList());
        return ImmutableList.copyOf(columns);
    }