![]() ![]() The cursor can only reference one row at a time, but can move to other rows of the result set as needed. By using the same mechanics, a SQL procedure can also define a result set and return it directly to the caller of the SQL procedure or to a client application.Ī cursor can be viewed as a pointer to one row in a set of rows. In SQL procedures, a cursor makes it possible to define a result set (a set of data rows) and perform complex logic on a row by row basis. In this scenario, a cursor enables the sequential processing of rows in a result set. Cursors enable manipulation of whole result sets at once. ![]() A hold cursor does not close it remains open after a transaction ends. Valid Values 0 1 Behavior If set to 1 (Enabled), cursor behavior is. Ordinarily, all cursors close at the end of a transaction. Attribute WithHold (WH) Purpose Determines whether the cursor stays open on a commit. A hold cursor allows uninterrupted access to a set of rows across multiple transactions. Devart ODBC Driver for PostgreSQL is a high-performance connectivity tool with enterprise-level features for accessing PostgreSQL databases from ODBC-compliant BI, ETL, reporting, and analytics tools on both 32-bit and 64-bit Windows, macOS, and Linux. The database cursor characteristic of traversal makes cursors akin to the programming language concept of iterator.Ĭursors are used by database programmers to process individual rows returned by database system queries. Use the WITH HOLD keywords to create a hold cursor. ![]() When this option is set, cursors and statements will not be. Cursors facilitate subsequent processing in conjunction with the traversal, such as retrieval, addition and removal of database records. The hold cursors option is used for select statements that are involved in building hitlists. In computer science, a database cursor is a mechanism that enables traversal over the records in a database. ![]()
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