Dapper WHERE IN与Postgres的字符串语句

Question

我看过Dapper WHERE IN statement with ODBC

但我不确定Dapper是否支持Postgres的WHERE IN（＆＃34; String1＆＃34;，＆＃34; String2＆＃34;）语法。这支持吗？我尝试挖掘代码，但我现在还没有时间。到目前为止，我只看过整数的例子。

示例：

_connection.QueryAsync<Lookup>("select * from lookup where lower(discriminator) in @types", new { types = new[] {"Prefix", "Suffix"} });

结果： PostgresException {＆＃34; 42601：语法错误在\＆＃34; $ 1 \＆＃34;＆＃34;}

说明：

{select * from lookup where lower(discriminator) in $1}

Answer 1

如果我没错，Postgres中的IN运算符不会支持数组作为参数。而不是IN尝试ANY运营商，如下所示：

var query = "SELECT * FROM lookup WHERE LOWER(discriminator) = ANY(@types)";

_connection.QueryAsync<Lookup>(query, new { types = new[] {"Prefix", "Suffix"} });