Once a cursor has been opened, it can be manipulated with the statements described here. These manipulations need not occur in the same function that opened the cursor to begin with. You can return a refcursor value out of a function and let the caller operate on the cursor. 3.1. FETCH F...
Once a cursor has been opened, it can be manipulated with the statements described here. These manipulations need not occur in the same function that opened the cursor to begin with. You can return a refcursor value out of a function and let the caller operate on the cursor. 3.1. FETCH F...
CURSOR_STATUS 函数。 sp_cursor_list、sp_describe_cursor、sp_describe_cursor_tables 以及 sp_describe_cursor_columns 系统存储过程。 sp_cursor_list 和 sp_describe_cursor 的 cursor_name 输出列返回游标变量的名称。 使用cursor 数据类型创建的所有变量都可以为 Null。 对于CREATE TABLE 语句中的列,不能使用...
[postgresql] [bug]添加了对 asyncpg 方言的支持,以在可用时返回cursor.rowcount值以用于 SELECT 语句。虽然这不是cursor.rowcount的典型用法,但是其他 PostgreSQL 方言通常提供此值。拉取请求由 Michael Gorven 提供。 参考文献:#9048 mysql [mysql] [usecase]添加了对 MySQL 索引反射的支持,以正确反映以前被忽略的...
使用SELECT 语句 - 用于访问CursorResult和Row对象的入门材料。 成员 all(), close(), columns(), fetchall(), fetchmany(), fetchone(), first(), freeze(), inserted_primary_key, inserted_primary_key_rows, is_insert, keys(), last_inserted_params(), last_updated_params(), lastrow_has_default...
i've been researching this for two days and the answer is the same: yes, the rows seem to be ordered, but no, nobody can guarantee it. SQL Server is just the one actually breaking the rule really badly right now. Over on pep-249, we are probably going to even have cursor.executema...
DECLARE CURSOR statement– Populate the cursor with values that will be evaluated. NOTE – There are an equal number of variables in the DECLARE CURSOR FOR statement as there are in the SELECT statement. This could be one or many variables and associated columns. ...
Copy tables with all constraints Correct way to run multiple sql scripts from one 'master' script? with logs etc. Could #TempTable within SP cause lock on tempdb? Could not complete cursor operation because the table schema changed after the cursor was declared Could not continue scan with NO...
SQL_MAX_COLUMNS_IN_SELECT SQL_MAX_COLUMNS_IN_TABLE SQL_MAX_CURSOR_NAME_LEN SQL_MAX_IDENTIFIER_LEN SQL_MAX_INDEX_SIZE SQL_MAX_PROCEDURE_NAME_LEN SQL_MAX_ROW_SIZE SQL_MAX_ROW_SIZE_INCLUDES_LONG SQL_MAX_SCHEMA_NAME_LEN SQL_MAX_STATEMENT_LEN SQL_MAX_TABLE_NAME_LEN SQL_MAX_TABLES_IN_SELE...
None - By default, psycopg2’s extensions are not used, and the usual cursor.executemany() method is used when invoking batches of statements. ‘batch’ - Uses psycopg2.extras.execute_batch so that multiple copies of a SQL query, each one corresponding to a parameter set passed to executemany...