Using CREATE PROCEDURE in PostgreSQL CREATE PROCEDURE will allow you to write procedures just like in most other modern databases. The syntax is quite simple and definitely not hard to use: 1 2 3 4 5 6 7 8 9 10 11 12 13 db11=# \h CREATE PROCEDURE Command: CREATE PROCEDURE Description...
PostgreSQL , CREATE PROCEDURE , CALL , 增强 , 11 背景 PostgreSQL一直以来都是通过create function来创建函数和存储过程(return void),通过select或者perform(plpgsql内部调用函数)来调用函数。 通过inline code来模拟类似procedure的用法: do language plpgsql $$ declare -- ... begin -- ... end; $$; ...
postgres=# \help SELECT Command: SELECT Description: retrieve rows from a table or view Syntax: [ WITH [ RECURSIVE ] with_query [, ...] ] SELECT [ ALL | DISTINCT [ ON ( expression [, ...] ) ] ] [ * | expression [ [ AS ] output_name ] [, ...] ] [ FROM from_item [,...
postgres=# \help SELECT Command: SELECT Description: retrieve rows from a table or view Syntax: [ WITH [ RECURSIVE ] with_query [, ...] ] SELECT [ ALL | DISTINCT [ ON ( expression [, ...] ) ] ] [ * | expression [ [ AS ] output_name ] [, ...] ] [ FROM from_item [,...
Syntax: [ WITH [ RECURSIVE ] with_query [, ...] ] SELECT [ ALL | DISTINCT [ ON ( expression [, ...] ) ] ] [ * | expression [ [ AS ] output_name ] [, ...] ] [ FROM from_item [, ...] ] [ WHERE condition ] ...
postgres=# \helpSELECTCommand:SELECTDescription:retrieve rows from a table or viewSyntax:[WITH[RECURSIVE]with_query[,...]]SELECT[ALL|DISTINCT[ON(expression[,...])]][*|expression[[AS]output_name][,...]][FROMfrom_item[,...]][WHEREcondition][GROUPBYgrouping_element[,...]][HAVINGcondition...
效果:当插入一条新记录时,create_at 字段会自动设置为当前时间,update_at 字段保持为空或可以初始化为 NULL。当更新一条记录时,update_at 字段会自动设置为当前时间。遇到问题:1.在创建触发器调用函数时使用 EXECUTE PROCEDURE 出现报错:SQL 错误[42601]: ERROR: syntax error at or near “FUNCTION” Position:...
*/ if (strchr(cp1, '\\') != NULL) *cp2++ = ESCAPE_STRING_SYNTAX; *cp2++ = '\''; while (*cp1) { if (SQL_STR_DOUBLE(*cp1, true)) *cp2++ = *cp1; *cp2++ = *cp1++; } strcpy(cp2, "'::pg_catalog.refcursor"); curname_def->query = pstrdup(buf); curname_def->...
Use the execute() method of a cursor object to execute a stored procedure call. Use the CALL sp_name(arguments) syntax to construct a stored procedure call.PreviousPostgreSQL Python: Call PostgreSQL Functions NextPostgreSQL Python: Handling Binary Data ...
The full SQL type syntax is allowed for declaring a function's arguments and return value. However, parenthesized type modifiers (e.g., the precision field for type numeric) are discarded by CREATE FUNCTION. Thus for example CREATE FUNCTION foo (varchar(10...