Поддержка курсоров
Поддержка курсоров
Each function listed below returns information about a cursor, or performs a task that performs a cursor-related task such as positioning of a cursor, linking of cursors, creating and closing cursors, counting of records associated with a cursor, filtering, setting and comparing bookmarks, and refreshing all buffers associated with a cursor.
DbiActivateFilter:
Activates a filter.
DbiAddFilter:
Adds a filter to a table, but does not activate the filter (the record set is not yet altered).
DbiApplyDelayedUpdates:
When cached updates cursor layer is active, writes all modifications made to cached data to the
underlying database.
DbiBeginDelayedUpdates:
Creates a cached updates cursor layer so that users can make extended changes to temporarily
cached table data without writing to the actual table, thereby minimizing resource locking.
DbiBeginLinkMode:
Converts a cursor to a link cursor. Given an open cursor, prepares for linked access. Returns a
new cursor.
DbiCloneCursor:
Creates a new cursor (clone cursor) which has the same result set as the given cursor
(source cursor).
DbiCloseCursor:
Closes a previously opened cursor.
DbiCompareBookMarks:
Compares the relative positions of two bookmarks in the result set associated with the cursor.
DbiDeactivateFilter:
Temporarily stops the specified filter from affecting the record set by turning the filter off.
DbiDropFilter:
Deactivates and removes a filter from memory, and frees all resources.
DbiEndDelayedUpdates:
Closes a cached updates cursor layer ending the cached updates mode.
DbiEndLinkMode:
Ends linked cursor mode, and returns the original cursor.
DbiExtractKey:
Retrieves the key value for the current record of the given cursor or from the supplied record buffer.
DbiForceRecordReread:
Rereads a single record from the server on demand, refreshing one row only, rather than clearing
the cache.
DbiForceReread:
Refreshes all buffers associated with the cursor, if necessary.
DbiFormFullName:
Returns the fully qualified table name.
DbiGetBookMark:
Saves the current position of a cursor to the client-supplied buffer called a bookmark.
DbiGetCursorForTable:
Finds the cursor for the given table.
DbiGetCursorProps:
Returns the properties of the cursor.
DbiGetExactRecordCount:
Retrieves the current exact number of records associated with the cursor. NEW FUNCTION BDE 4.0
DbiGetFieldDescs:
Retrieves a list of descriptors for all the fields in the table associated with the cursor.
DbiGetLinkStatus:
Returns the link status of the cursor.
DbiGetNextRecord:
Retrieves the next record in the table associated with the cursor.
DbiGetPriorRecord:
Retrieves the previous record in the table associated with the given cursor.
DbiGetProp:
Returns a property of an object.
DbiGetRecord:
Retrieves the current record, if any, in the table associated with the cursor.
DbiGetRecordCount:
Retrieves the current number of records associated with the cursor.
DbiGetRecordForKey:
Finds and retrieves a record matching a key and positions the cursor on that record.
DbiGetRelativeRecord:
Positions the cursor on a record in the table relative to the current position of the cursor.
DbiGetSeqNo:
Retrieves the sequence number of the current record in the table associated with the cursor.
DbiLinkDetail:
Establishes a link between two tables such that the detail table has its record set limited to the
set of records matching the linking key values of the master table cursor.
DbiLinkDetailToExp:
Links the detail cursor to the master cursor using an expression.
DbiMakePermanent:
Changes a temporary table created by DbiCreateTempTable into a permanent table.
DbiOpenTable:
Opens the given table for access and associates a cursor handle with the opened table.
DbiResetRange:
Removes the specified table's limited range previously established by the function DbiSetRange.
DbiSaveChanges:
Forces all updated records associated with the cursor to disk.
DbiSetFieldMap:
Sets a field map of the table associated with the given cursor.
DbiSetProp:
Sets the specified property of an object to a given value.
DbiSetRange:
Sets a range on the result set associated with the cursor.
DbiSetToBegin:
Positions the cursor to BOF (just before the first record).
DbiSetToBookMark:
Positions the cursor to the location saved in the specified bookmark.
DbiSetToCursor:
Sets the position of one cursor (the destination cursor) to that of another (the source cursor).
DbiSetToEnd:
Positions the cursor to EOF (just after the last record).
DbiSetToKey:
Positions an index-based cursor on a key value.
DbiSetToRecordNo:
Positions the cursor of a dBASE table to the given physical record number.
DbiSetToSeqNo:
Positions the cursor to the specified sequence number of a Paradox table.
DbiUnlinkDetail:
Removes a link between two cursors.