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db2_num_rows
Returns the number of rows affected by an SQL statement
(PECL ibm_db2:1.0-1.6.2)
Returns the number of rows deleted, inserted, or updated by an SQL statement. To determine the number of rows that will be returned by a SELECT statement, issue SELECT COUNT(*) with the same predicates as your intended SELECT statement and retrieve the value.
If your application logic checks the number of rows returned by a SELECT
statement and branches if the number of rows is 0, consider modifying your
application to attempt to return the first row with one of
db2_fetch_assoc(), db2_fetch_both(),
db2_fetch_array(), or db2_fetch_row(),
and branch if the fetch function returns
Note:
If you issue a SELECT statement using a scrollable cursor, db2_num_rows() returns the number of rows returned by the SELECT statement. However, the overhead associated with scrollable cursors significantly degrades the performance of your application, so if this is the only reason you are considering using scrollable cursors, you should use a forward-only cursor and either call SELECT COUNT(*) or rely on the boolean return value of the fetch functions to achieve the equivalent functionality with much better performance. |
Change Languagedb2_autocommit db2_bind_param db2_client_info db2_close db2_column_privileges db2_columns db2_commit db2_conn_error db2_conn_errormsg db2_connect db2_cursor_type db2_escape_string db2_exec db2_execute db2_fetch_array db2_fetch_assoc db2_fetch_both db2_fetch_object db2_fetch_row db2_field_display_size db2_field_name db2_field_num db2_field_precision db2_field_scale db2_field_type db2_field_width db2_foreign_keys db2_free_result db2_free_stmt db2_get_option db2_lob_read db2_next_result db2_num_fields db2_num_rows db2_pconnect db2_prepare db2_primary_keys db2_procedure_columns db2_procedures db2_result db2_rollback db2_server_info db2_set_option db2_special_columns db2_statistics db2_stmt_error db2_stmt_errormsg db2_table_privileges db2_tables |