答案就在org.apache.spark.sql.catalyst.expressions.Cast中, 先看 canCast 方法, 可以看到 DateType 其实是可以转成 NumericType 的, 然后再看下面castToLong的方法, 可以看到case DateType => buildCast[Int](_, d => null)居然直接是个 null, 看提交记录其实这边有过反复, 然后为了和 hive 统一, 所以返...
Most versions of BASIC added string concatenation, which is simply the joining of two strings, end to end. For example, “Now is the time” & “for all good men” results in “Now is the time for all good men”The trouble was that only a few used an ampersand (&) for this operati...
Can an SSIS package be run/invoked multiple times while the previous invocation is still running? Can I create a SSIS package to get only row 12 to row 123 from an excel sheet..?? Can I have multiple instances of SSIS on a server? Can I preserve carriage returns in a string variable ...
So by all means build up a query that has those in it and then the values (the unsafe and possible vectors for attack!) from the outside world go into the values structure, which is something like: { col1Value: attributes.queryParam.dodgyValueFromOutsideWorld, col2Value: attributes.uri...
A connection to the directory on which to process the request was unavailable. This is likely a transient condition. A fast way to remove duplicated lines from an unsorted text file? a lot of cmdlets missing from powershell A member could not be added to or removed from the local group be...
// - Used for "<"+string(b)+">" concatenation where b is []byte. // - Used for string(b)=="foo" comparison where b is []byte. func slicebytetostringtmp(ptr *byte, n int) string { if raceenabled && n > 0 { racereadrangepc(unsafe.Pointer(ptr), uintptr(n), getcallerpc(...
QueryBuilder basically wraps 2 things that should always stay together: the query which you're building, and the parameters which must go together with our query. This is a simple concept but it allows us to dynamically add new parameterized SQL clauses/conditions in a single statement. This ...
Using this function on data which has already been escaped will escape the data twice. Note: If this function is not used to escape data, the query is vulnerable to SQL Injection Attacks. Note: mysql_real_escape_string() does not escape % and _. These are wildcards in MySQL if ...
Having a string be a sequence of some "character" type is convenient. You can typically treat them like arrays (often theyarearrays) which makes it easy to grab subranges, slice pieces off the beginning or end, delete portions, count elements, etc. ...
The 'sizeof' operator should not have an operand which is a function parameter declared as 'array of type'. V2627. MISRA. Function type should not be type qualified. V2628. MISRA. The pointer arguments to the Standard Library functions memcpy, memmove and memcmp should be pointers to ...