逃跑？（问号）在 hibernate/gorm sql 限制

Question

我正在尝试从 Grails 应用程序查询以 postgres ltree 类型存储的物化路径。不幸的是，我的查询使用了“？” GORM 将其作为参数捕获的运算符

sqlRestriction("materialized_path ? (SELECT ARRAY(SELECT CAST(CAST(subpath(?,0,generate_series) AS text) ||'.*{1}' AS lquery) FROM generate_series(1,nlevel(CAST(? AS lquery)))))"
                ,[vertex.materializedPath,vertex.materializedPath])

第一个问号应该被转义并且抛出的错误是

org.postgresql.util.PSQLException: No value specified for parameter 4.
at org.postgresql.core.v3.SimpleParameterList.checkAllParametersSet(SimpleParameterList.java:246)
at org.postgresql.core.v3.QueryExecutorImpl.execute(QueryExecutorImpl.java:272)
at org.postgresql.jdbc.PgStatement.executeInternal(PgStatement.java:430)
at org.postgresql.jdbc.PgStatement.execute(PgStatement.java:356)
at org.postgresql.jdbc.PgPreparedStatement.executeWithFlags(PgPreparedStatement.java:168)
at org.postgresql.jdbc.PgPreparedStatement.executeQuery(PgPreparedStatement.java:116)
at org.hibernate.engine.jdbc.internal.ResultSetReturnImpl.extract(ResultSetReturnImpl.java:70)

Answer 1

我自己通过一些实验找到了它。它只需要一个双问号。所以，

"materialized_path ? (SELECT ARRAY(...

变成

"materialized_path ?? (SELECT ARRAY(

逃跑？（问号）在 hibernate/gorm sql 限制

Escaping ? (question mark) in hibernate/gorm sql restriction

sql

postgresql

grails-orm

逃跑？ （问号）在 hibernate/gorm sql 限制

Escaping ? (question mark) in hibernate/gorm sql restriction

sql

postgresql

grails-orm

逃跑？（问号）在 hibernate/gorm sql 限制