pick (#39341)
In previous versions, we used a method based on JDBC 4.2 to read data,
so it was equivalent to abandoning support for ojdbc6. However, we
recently found that a large number of users still use Oracle version
11g, which will have some unexpected compatibility issues when using
ojdbc8 to connect. Therefore, I use version verification to make it
compatible with both ojdbc6 and ojdbc8, so that good compatibility can
be obtained through ojdbc6, and better reading efficiency can be
obtained through ojdbc8.
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