获取SQLite结果中的列数

Well, this should be ultra-simple, but I simply can't seem to spot it among the 1001 sqlite-related commands.

嗯,这应该是非常简单的,但我似乎无法在1001 sqlite相关命令中发现它。

So :

• I'm performing a SELECT statement, with sqlite3_prepare

我正在使用sqlite3_prepare执行SELECT语句

• I'm getting the results per row with sqlite3_step

我用sqlite3_step得到每行的结果

• I'm accessing the Xth's column's result by sqlite3_column_text(sqlStmt,X)

我正在通过sqlite3_column_text(sqlStmt,X)访问Xth列的结果

The question is :

问题是 :

How can I get the number of columns in the row? (= the range in which X can... move...)

如何获取行中的列数? (= X可以...移动的范围......)

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P.S. The question is tagged with d (I'm basically developing in D), but it won't make much difference since it's using native C bindings...

附:问题用d标记(我基本上用D开发),但它没有太大区别,因为它使用的是本机C绑定...

1 个解决方案

#1

According to http://www.sqlite.org/c3ref/data_count.html,

根据http://www.sqlite.org/c3ref/data_count.html,

int sqlite3_data_count(sqlite3_stmt *pStmt);

returns the number of columns in the current row of the result set of prepared statement pStmt.

返回预准备语句pStmt的结果集的当前行中的列数。