harmony 鸿蒙OH_Cursor
OH_Cursor
Overview
Defines a result set.
It provides APIs to access the result set obtained by querying the RDB store.
Since
10
Related Modules
Summary
Member Variables
| Name | Description |
|---|---|
| id | Unique identifier of the OH_Cursor struct. |
| getColumnCount | Pointer to the function used to obtain the number of columns in the result set. |
| getColumnType | Pointer to the function used to obtain the column type based on the specified column index. |
| getColumnIndex | Pointer to the function used to obtain the column index based on the specified column name. |
| getColumnName | Pointer to the function used to obtain the column name based on the specified column index. |
| getRowCount | Pointer to the function used to obtain the number of rows in the result set. |
| goToNextRow | Pointer to the function used to go to the next row of the result set. |
| getSize | Pointer to the function used to obtain information about the memory required when the column data type in the result set is BLOB or TEXT. |
| getText | Pointer to the function used to obtain the value in the form of a string based on the specified column and the current row. |
| getInt64 | Pointer to the function used to obtain the value of the int64_t type based on the specified column and the current row. |
| getReal | Pointer to the function used to obtain the value of the double type based on the specified column and the current row. |
| getBlob | Pointer to the function used to obtain the value in the form of a byte array based on the specified column and the current row. |
| isNull | Pointer to the function used to check whether the value in the specified column is null. |
| destroy | Pointer to the function used to close a result set. |
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