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phase 2: remove the clutter in utiity_hook.c and some funct renaming

non-main-redesign-suggest
Onur Tirtir 2024-02-28 18:25:33 +03:00
parent 0ba3a9bb5b
commit fadee4e494
3 changed files with 54 additions and 42 deletions
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51
src/backend/distributed/commands/non_main_db_distribute_object_ops.c
View File

@ -143,25 +143,42 @@ IsCommandToCreateOrDropMainDB(Node *parsetree)
/*
* RunPreprocessMainDBCommand runs the necessary commands for a query, in main
* database before query is run on the local node with PrevProcessUtility
* RunPreprocessNonMainDBCommand runs the necessary commands for a query, in main
* database before query is run on the local node with PrevProcessUtility.
*
* Returns true if previous utility hook needs to be skipped after completing
* preprocess phase.
*/
void
RunPreprocessMainDBCommand(Node *parsetree)
bool
RunPreprocessNonMainDBCommand(Node *parsetree)
{
if (!IsStatementSupportedFromNonMainDb(parsetree))
if (IsMainDB || !IsStatementSupportedFromNonMainDb(parsetree))
{
return;
return false;
}
if (IsCommandToCreateOrDropMainDB(parsetree))
{
/*
* We don't try to send the query to the main database if the CREATE/DROP DATABASE
* command is for the main database itself, this is a very rare case but it's
* exercised by our test suite.
*/
return false;
}
char *queryString = DeparseTreeNode(parsetree);
if (IsA(parsetree, CreatedbStmt) ||
IsA(parsetree, DropdbStmt))
if (IsA(parsetree, CreatedbStmt) || IsA(parsetree, DropdbStmt))
{
/*
* We always execute CREATE/DROP DATABASE from the main database. There are no
* transactional visibility issues, since these commands are non-transactional.
* And this way we only have to consider one codepath when creating databases.
*/
IsMainDBCommandInXact = false;
RunCitusMainDBQuery((char *) queryString);
return;
return true;
}
IsMainDBCommandInXact = true;
@ -184,18 +201,24 @@ RunPreprocessMainDBCommand(Node *parsetree)
List *unmarkParams = GetDistObjectOperationParams(parsetree);
UnMarkObjectDistributedLocallyFromNonMainDb(unmarkParams);
}
return false;
}
/*
* RunPostprocessMainDBCommand runs the necessary commands for a query, in main
* database after query is run on the local node with PrevProcessUtility
* RunPostprocessNonMainDBCommand runs the necessary commands for a query, in main
* database after query is run on the local node with PrevProcessUtility.
*/
void
RunPostprocessMainDBCommand(Node *parsetree)
RunPostprocessNonMainDBCommand(Node *parsetree)
{
if (IsStatementSupportedFromNonMainDb(parsetree) &&
StatementRequiresMarkDistributedGloballyFromNonMainDb(parsetree))
if (IsMainDB || !IsStatementSupportedFromNonMainDb(parsetree))
{
return;
}
if (StatementRequiresMarkDistributedGloballyFromNonMainDb(parsetree))
{
MarkObjectDistributedGloballyFromNonMainDb(parsetree);
}

41
src/backend/distributed/commands/utility_hook.c
View File

@ -247,36 +247,25 @@ citus_ProcessUtility(PlannedStmt *pstmt,
if (!CitusHasBeenLoaded())
{
/*
* We always execute CREATE/DROP DATABASE from the main database. There are no
* transactional visibility issues, since these commands are non-transactional.
* And this way we only have to consider one codepath when creating databases.
* We don't try to send the query to the main database if the CREATE/DROP DATABASE
* command is for the main database itself, this is a very rare case but it's
* exercised by our test suite.
* Process the command via RunPreprocessNonMainDBCommand and
* RunPostprocessNonMainDBCommand hooks if we're in a non-main database
* and if the command is a node-wide object management command that we
* support from non-main databases.
*/
if (!IsMainDB &&
!IsCommandToCreateOrDropMainDB(parsetree))
{
RunPreprocessMainDBCommand(parsetree);
if (IsA(parsetree, CreatedbStmt) ||
IsA(parsetree, DropdbStmt))
{
return;
}
bool shouldSkipPrevUtilityHook = RunPreprocessNonMainDBCommand(parsetree);
if (!shouldSkipPrevUtilityHook)
{
/*
* Ensure that utility commands do not behave any differently until CREATE
* EXTENSION is invoked.
*/
PrevProcessUtility(pstmt, queryString, false, context,
params, queryEnv, dest, completionTag);
}
/*
* Ensure that utility commands do not behave any differently until CREATE
* EXTENSION is invoked.
*/
PrevProcessUtility(pstmt, queryString, false, context,
params, queryEnv, dest, completionTag);
if (!IsMainDB)
{
RunPostprocessMainDBCommand(parsetree);
}
RunPostprocessNonMainDBCommand(parsetree);
return;
}

4
src/include/distributed/commands.h
View File

@ -106,8 +106,8 @@ const DistributeObjectOps * GetDistributeObjectOps(Node *node);
/* functions to support node-wide object management commands from non-main dbs */
extern bool IsCommandToCreateOrDropMainDB(Node *parsetree);
extern void RunPreprocessMainDBCommand(Node *parsetree);
extern void RunPostprocessMainDBCommand(Node *parsetree);
extern bool RunPreprocessNonMainDBCommand(Node *parsetree);
extern void RunPostprocessNonMainDBCommand(Node *parsetree);
/*
* Flags that can be passed to GetForeignKeyOids to indicate