private void checkSupport(SqlIdentifier identifier) {
        String tableName = identifier.getComponent(0).getSimple();
        String sideTableName;
        String sideTableAlias;
        if (joinInfo.isLeftIsSideTable()) {
            sideTableName = joinInfo.getLeftTableName();
            sideTableAlias = joinInfo.getLeftTableAlias();
        } else {
            sideTableName = joinInfo.getRightTableName();
            sideTableAlias = joinInfo.getRightTableAlias();
        }
        boolean isSide = tableName.equals(sideTableName) || tableName.equals(sideTableAlias);
        String errorMsg = "only support set side table constant field, error field " + identifier;
        Preconditions.checkState(isSide, errorMsg);
    }
deal with equation with constant etc. foo.id = 1
@param literal
@param identifier
core/src/main/java/com/dtstack/flink/sql/side/BaseSideInfo.java