mode; num_held_lwlocks--; for (; i < num_held_lwlocks; i++) held_lwlocks[i] = held_lwlocks[i + 1]; PRINT_LWDEBUG("LWLockRelease", lock, mode); /* * Release my hold on lock, after that it can immediately be acquired by * others, even if we still have to wakeup other ...
FOUND is set this way when the loop exits; inside the execution of the loop, FOUND is not modified by the loop statement, although it might be changed by the execution of other statements within the loop body. RETURN QUERY and RETURN QUERY EXECUTE statements set FOUND true if the query ...
在一个内存上下文被创建时,其 isReset字段置为True,表示从上一次重置到当前没有内存被分配。只要在该内存上下文中进行了分配,则将其 isReset字段置为False。这样在进行重置时,可以检查内存上下文的isReset字段,如果为True则表示该内存上下文中没有进行过内存分配,所以为true就不需要进行实际的重置工作,从而提高操作效率...
declare r record; begin OLD.id := OLD.id+1; NEW.id := NEW.id+1; select 1 as id into r; raise notice '%, old.id:%. new.id:%', TG_NAME, OLD.id, NEW.id; return r; end; language plpgsql; CREATE FUNCTION postgres=# update t_ret set info=’new’ where id=2 returning *;...
When a WAL record crosses a WAL page boundary, and is therefore already split using continuation records, it can be split at the page boundary. In other words, the first main WAL record and its continuation records can be sent in different XLogData messages. 代码语言:javascript 复制 /* *...
说明:Character with the given code. For UTF8 the argument is treated as a Unicode code point. For other multibyte encodings the argument must designate a strictly ASCII character. The NULL (0) character is not allowed because text data types cannot store such bytes. 得到某ACSII值对应的字符 ...
(x);-- there is a constant filter on a primary key, hence the filtered row-- from the distributed table will be pulled to coordinator to support the joinSELECT*FROMcitus_tableJOINpostgres_tableUSING(x)WHEREcitus_table.x =10;SETcitus.local_table_join_policyto'prefer-distributed';-- since ...
/* other dependencies, as PlanInvalItems */ List *paramExecTypes; /* type OIDs for PARAM_EXEC Params */ Node *utilityStmt; /* non-null if this is utility stmt */ /* statement location in source string (copied from Query) */ int stmt_location; /* start location, or -1 if unknown...
The Unicode escape syntax works only when the server encoding is UTF8. When other server encodings are used, only code points in the ASCII range (up to \007F) can be specified. Both the 4-digit and the 6-digit form can be used to specify UTF-16 surrogate pairs to compose characters ...
The other issue here is that it isn't even connecting to the the other 2 nodes which I have the min set at 2. So, whatever that setting is doing it is not failing over for the fact that there is 0 standby's nor the witness reconnecting/attaching to it; which is probably why the...