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package sf.database.template.expression;

public class ExpressionHelp {
    public static final String SQL_TEMPLATE_MAP_KEY = "_SQL_TEMPLATE_MAP_";
    public static final String SQL_PARA_KEY = "_SQL_PARA_";
    public static final String PARA_ARRAY_KEY = "_PARA_ARRAY_"; // 此参数保持不动，已被用于模板取值 _PARA_ARRAY_[n]

    public static final String SQL_COUNT_KEY = "_SQL_COUNT_";//统计sql总数


    private static ExpressionHelp instance = null;

    public static ExpressionHelp getInstance() {
        if (instance == null) {
            instance = new ExpressionHelp();
        }
        return instance;
    }
}