to_tsquery() return 一个值怎么会和搜索到的值不匹配呢？

Question

谁能给我解释一下这是怎么回事：

SELECT description, description_search
FROM my_table 
WHERE description_search @@ to_tsquery('ins:*')

可以return这个：

description: 
'The leap second configuration has been updated.
Reason: Leap second data initialized from registry during boot
Leap seconds enabled: true
New leap second count: 0
Old leap second count: 0'

description_search:
'0':25,30 'boot':16 'configur':4 'count':24,29 'data':11 'enabl':19 'initi':12 
'leap':2,9,17,22,27 'new':21 'old':26 'reason':8 'registri':14 'second':3,10,18,23,28 
'true':20 'updat':7

当 returned 字符串中没有匹配的词时 'ins:*'?

Answer 1

看看什么to_tsquery returns.

select to_tsquery('ins:*');
 to_tsquery 
------------
 'in':*
(1 row)

所以 'ins:' 被词干化为 'in:'（无论如何对于英语），并且 'in:*' 显然匹配 'initi'

如果您已经自己编写了查询，请不要使用 to_tsquery()。只需使用您编写的查询，'ins:*'::tsquery

to_tsquery() return 一个值怎么会和搜索到的值不匹配呢？

How can to_tsquery() return a value that does not match the searched value?

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