针对你提出的问题“value must be ≥ 0 but getcolumnindex can be -1”,我们可以从以下几个方面进行详细分析和解答: 1. 理解问题背景 getcolumnindex函数:通常用于获取某个列名或列标识符在数据表中的索引位置。其返回值是一个整数,表示列的索引(从0开始计数)。 value的约束条件:题目中提到value必须大于等于0...
结合函数声明: String getString(@IntRange(from = 0) int columnIndex); 可以知道getString方法要求一个int类型的参数,且要求该最小为0 getColumnIndex的声明: @IntRange(from = -1) int getColumnIndex(String columnName); 很明显它的返回值是从-1开始的 编译器检查到
1.使用getColumnIndexOrThrow()而不是getColumnIndex()。前者在缺少列时引发异常，后者返回-1。1.将ge...
Value must be ≥ 0 but can be -1 1 cursor.getString(cursor.getColumnIndex("ID")); 报错Value must be ≥ 0 but can be -1 是因为getString的参数必须大于0 但是getColumnIndex有可能会返回-1 所以会报错 直接定义一个变量初始值为0即可
Databases created by RocksDB or Pebble versionsv1and earlier must be upgraded to a compatible format major version before running newer Pebble versions. Newer Pebble versions will refuse to open databases in no longer supported formats. To opt into new formats, a user may setFormatMajorVersionon...
All reads and writes must be performed from inside a transaction. BuntDB can have one write transaction opened at a time, but can have many concurrent read transactions. Each transaction maintains a stable view of the database. In other words, once a transaction has begun, the data for that...
DTS_E_ATLEASTONEINPUTMUSTBEMAPPEDTOOUTPUT DTS_E_ATTEMPTINGTOINSERTINTOAREADONLYCOLUMN DTS_E_ATTEMPTINGTOINSERTINTOAROWIDCOLUMN DTS_E_ATTEMPTINGTOINSERTINTOAROWVERCOLUMN DTS_E_AXTASK_EMPTY_SCRIPT DTS_E_AXTASK_HANDLER_NOT_FOUND DTS_E_AXTASK_INITIALIZATION_WITH_WRONG_XML_ELEMENT DTS_E_AXTA...
Index .5in is not a valid unit designator. Valid unit designators are in, mm, cm, pt, pc. 'No such host is known' error when configuring Reporting database 'Oracle' data extension not registered 'Return' statement in a Function,Get,or Operator must return a value...Question "An error...
If the cell contains a string, then this value is an index into the shared string table, pointing to the actual string value. Otherwise, the value of the cell is expressed directly in this element. Cells containing formulas express the last calculated result of the formula in this element....
It must be one of the values found in the DTSValidationStatus enumeration. Namespace: Microsoft.SqlServer.Dts.Runtime Assembly: Microsoft.SqlServer.ManagedDTS (in Microsoft.SqlServer.ManagedDTS.dll) Syntax C# Copy public const int DTSBC_E_INVALIDVALIDATIONSTATUSVALUE See Also Reference HResults ...