oracle PLSQL CLOBS 转换成变量
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PLSQL CLOBS into variables
提问by DaveQuinn
I'm trying to save a CLOB
into a variable to perform operations like extract and such. I have this code:
我正在尝试将 a 保存CLOB
到变量中以执行提取等操作。我有这个代码:
DECLARE
clob_rec CLOB;
n_rec NUMBER:=100;
BEGIN
SELECT LOB INTO clob_rec FROM table1 WHERE ID = 1234;
n_rec := clob_rec.EXTRACT('//XPTO/text()', 'xmlns:XPTO').getNumVal();
END;
I want to save multiple values from the XML
to various variables like n_rec
. How can get an "instance of the object (CLOB)" to perform functions or methods like extract()
?
我想从XML
到各种变量中保存多个值,例如n_rec
. 如何获得“对象的实例(CLOB)”来执行诸如此类的功能或方法extract()
?
回答by Jeffrey Kemp
You need to convert it to an XMLtype first:
您需要先将其转换为 XMLtype:
DECLARE
clob_rec CLOB;
n_rec NUMBER:=100;
x XMLType;
BEGIN
SELECT LOB INTO clob_rec FROM table1 WHERE ID = 1234;
x := XMLType(clob_rec);
n_rec := x.EXTRACT('//XPTO/text()', 'xmlns:XPTO').getNumVal();
END;