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Rename TransactionChain functions 

We call this thing a "transaction block" everywhere except in a few
functions, where it is mysteriously called a "transaction chain".  In
the SQL standard, a transaction chain is something different.  So rename
these functions to match the common terminology.

Reviewed-by: Alvaro Herrera <alvherre@alvh.no-ip.org>
This commit is contained in:
Peter Eisentraut 2018-02-16 20:44:15 -05:00
parent 8d47a90862
commit 04700b685f
14 changed files with 52 additions and 52 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

28
src/backend/access/transam/xact.c
View File

@ -310,7 +310,7 @@ static void CallSubXactCallbacks(SubXactEvent event,
SubTransactionId mySubid,
SubTransactionId parentSubid);
static void CleanupTransaction(void);
static void CheckTransactionChain(bool isTopLevel, bool throwError,
static void CheckTransactionBlock(bool isTopLevel, bool throwError,
const char *stmtType);
static void CommitTransaction(void);
static TransactionId RecordTransactionAbort(bool isSubXact);
@ -3134,7 +3134,7 @@ AbortCurrentTransaction(void)
}
/*
* PreventTransactionChain
* PreventInTransactionBlock
*
* This routine is to be called by statements that must not run inside
* a transaction block, typically because they have non-rollback-able
@ -3151,7 +3151,7 @@ AbortCurrentTransaction(void)
* stmtType: statement type name, for error messages.
*/
void
PreventTransactionChain(bool isTopLevel, const char *stmtType)
PreventInTransactionBlock(bool isTopLevel, const char *stmtType)
{
/*
* xact block already started?
@ -3190,8 +3190,8 @@ PreventTransactionChain(bool isTopLevel, const char *stmtType)
}
/*
* WarnNoTranactionChain
* RequireTransactionChain
* WarnNoTranactionBlock
* RequireTransactionBlock
*
* These two functions allow for warnings or errors if a command is executed
* outside of a transaction block. This is useful for commands that have no
@ -3204,29 +3204,29 @@ PreventTransactionChain(bool isTopLevel, const char *stmtType)
* If we appear to be running inside a user-defined function, we do not
* issue anything, since the function could issue more commands that make
* use of the current statement's results. Likewise subtransactions.
* Thus these are inverses for PreventTransactionChain.
* Thus these are inverses for PreventInTransactionBlock.
*
* isTopLevel: passed down from ProcessUtility to determine whether we are
* inside a function.
* stmtType: statement type name, for warning or error messages.
*/
void
WarnNoTransactionChain(bool isTopLevel, const char *stmtType)
WarnNoTransactionBlock(bool isTopLevel, const char *stmtType)
{
CheckTransactionChain(isTopLevel, false, stmtType);
CheckTransactionBlock(isTopLevel, false, stmtType);
}
void
RequireTransactionChain(bool isTopLevel, const char *stmtType)
RequireTransactionBlock(bool isTopLevel, const char *stmtType)
{
CheckTransactionChain(isTopLevel, true, stmtType);
CheckTransactionBlock(isTopLevel, true, stmtType);
}
/*
* This is the implementation of the above two.
*/
static void
CheckTransactionChain(bool isTopLevel, bool throwError, const char *stmtType)
CheckTransactionBlock(bool isTopLevel, bool throwError, const char *stmtType)
{
/*
* xact block already started?
@ -3255,7 +3255,7 @@ CheckTransactionChain(bool isTopLevel, bool throwError, const char *stmtType)
}
/*
* IsInTransactionChain
* IsInTransactionBlock
*
* This routine is for statements that need to behave differently inside
* a transaction block than when running as single commands. ANALYZE is
@ -3265,10 +3265,10 @@ CheckTransactionChain(bool isTopLevel, bool throwError, const char *stmtType)
* inside a function.
*/
bool
IsInTransactionChain(bool isTopLevel)
IsInTransactionBlock(bool isTopLevel)
{
/*
* Return true on same conditions that would make PreventTransactionChain
* Return true on same conditions that would make PreventInTransactionBlock
* error out
*/
if (IsTransactionBlock())

2
src/backend/commands/cluster.c
View File

@ -202,7 +202,7 @@ cluster(ClusterStmt *stmt, bool isTopLevel)
* We cannot run this form of CLUSTER inside a user transaction block;
* we'd be holding locks way too long.
*/
PreventTransactionChain(isTopLevel, "CLUSTER");
PreventInTransactionBlock(isTopLevel, "CLUSTER");
/*
* Create special memory context for cross-transaction storage.

2
src/backend/commands/dbcommands.c
View File

@ -1476,7 +1476,7 @@ AlterDatabase(ParseState *pstate, AlterDatabaseStmt *stmt, bool isTopLevel)
dtablespace->defname),
parser_errposition(pstate, dtablespace->location)));
/* this case isn't allowed within a transaction block */
PreventTransactionChain(isTopLevel, "ALTER DATABASE SET TABLESPACE");
PreventInTransactionBlock(isTopLevel, "ALTER DATABASE SET TABLESPACE");
movedb(stmt->dbname, defGetString(dtablespace));
return InvalidOid;
}

2
src/backend/commands/discard.c
View File

@ -63,7 +63,7 @@ DiscardAll(bool isTopLevel)
* DISCARD ALL inside a transaction block would leave the transaction
* still uncommitted.
*/
PreventTransactionChain(isTopLevel, "DISCARD ALL");
PreventInTransactionBlock(isTopLevel, "DISCARD ALL");
/* Closing portals might run user-defined code, so do that first. */
PortalHashTableDeleteAll();

2
src/backend/commands/portalcmds.c
View File

@ -63,7 +63,7 @@ PerformCursorOpen(DeclareCursorStmt *cstmt, ParamListInfo params,
* user-visible effect).
*/
if (!(cstmt->options & CURSOR_OPT_HOLD))
RequireTransactionChain(isTopLevel, "DECLARE CURSOR");
RequireTransactionBlock(isTopLevel, "DECLARE CURSOR");
/*
* Parse analysis was done already, but we still have to run the rule

4
src/backend/commands/subscriptioncmds.c
View File

@ -339,7 +339,7 @@ CreateSubscription(CreateSubscriptionStmt *stmt, bool isTopLevel)
* replication slot.
*/
if (create_slot)
PreventTransactionChain(isTopLevel, "CREATE SUBSCRIPTION ... WITH (create_slot = true)");
PreventInTransactionBlock(isTopLevel, "CREATE SUBSCRIPTION ... WITH (create_slot = true)");
if (!superuser())
ereport(ERROR,
@ -897,7 +897,7 @@ DropSubscription(DropSubscriptionStmt *stmt, bool isTopLevel)
* don't have the proper facilities for that.
*/
if (slotname)
PreventTransactionChain(isTopLevel, "DROP SUBSCRIPTION");
PreventInTransactionBlock(isTopLevel, "DROP SUBSCRIPTION");
ObjectAddressSet(myself, SubscriptionRelationId, subid);

2
src/backend/commands/typecmds.c
View File

@ -1321,7 +1321,7 @@ AlterEnum(AlterEnumStmt *stmt, bool isTopLevel)
!(tup->t_data->t_infomask & HEAP_UPDATED))
/* safe to do inside transaction block */ ;
else
PreventTransactionChain(isTopLevel, "ALTER TYPE ... ADD");
PreventInTransactionBlock(isTopLevel, "ALTER TYPE ... ADD");
AddEnumLabel(enum_type_oid, stmt->newVal,
stmt->newValNeighbor, stmt->newValIsAfter,

4
src/backend/commands/vacuum.c
View File

@ -186,11 +186,11 @@ vacuum(int options, List *relations, VacuumParams *params,
*/
if (options & VACOPT_VACUUM)
{
PreventTransactionChain(isTopLevel, stmttype);
PreventInTransactionBlock(isTopLevel, stmttype);
in_outer_xact = false;
}
else
in_outer_xact = IsInTransactionChain(isTopLevel);
in_outer_xact = IsInTransactionBlock(isTopLevel);
/*
* Due to static variables vac_context, anl_context and vac_strategy,

6
src/backend/replication/walsender.c
View File

@ -1516,7 +1516,7 @@ exec_replication_command(const char *cmd_string)
break;
case T_BaseBackupCmd:
PreventTransactionChain(true, "BASE_BACKUP");
PreventInTransactionBlock(true, "BASE_BACKUP");
SendBaseBackup((BaseBackupCmd *) cmd_node);
break;
@ -1532,7 +1532,7 @@ exec_replication_command(const char *cmd_string)
{
StartReplicationCmd *cmd = (StartReplicationCmd *) cmd_node;
PreventTransactionChain(true, "START_REPLICATION");
PreventInTransactionBlock(true, "START_REPLICATION");
if (cmd->kind == REPLICATION_KIND_PHYSICAL)
StartReplication(cmd);
@ -1542,7 +1542,7 @@ exec_replication_command(const char *cmd_string)
}
case T_TimeLineHistoryCmd:
PreventTransactionChain(true, "TIMELINE_HISTORY");
PreventInTransactionBlock(true, "TIMELINE_HISTORY");
SendTimeLineHistory((TimeLineHistoryCmd *) cmd_node);
break;

30
src/backend/tcop/utility.c
View File

@ -453,13 +453,13 @@ standard_ProcessUtility(PlannedStmt *pstmt,
break;
case TRANS_STMT_COMMIT_PREPARED:
PreventTransactionChain(isTopLevel, "COMMIT PREPARED");
PreventInTransactionBlock(isTopLevel, "COMMIT PREPARED");
PreventCommandDuringRecovery("COMMIT PREPARED");
FinishPreparedTransaction(stmt->gid, true);
break;
case TRANS_STMT_ROLLBACK_PREPARED:
PreventTransactionChain(isTopLevel, "ROLLBACK PREPARED");
PreventInTransactionBlock(isTopLevel, "ROLLBACK PREPARED");
PreventCommandDuringRecovery("ROLLBACK PREPARED");
FinishPreparedTransaction(stmt->gid, false);
break;
@ -473,7 +473,7 @@ standard_ProcessUtility(PlannedStmt *pstmt,
ListCell *cell;
char *name = NULL;
RequireTransactionChain(isTopLevel, "SAVEPOINT");
RequireTransactionBlock(isTopLevel, "SAVEPOINT");
foreach(cell, stmt->options)
{
@ -490,12 +490,12 @@ standard_ProcessUtility(PlannedStmt *pstmt,
break;
case TRANS_STMT_RELEASE:
RequireTransactionChain(isTopLevel, "RELEASE SAVEPOINT");
RequireTransactionBlock(isTopLevel, "RELEASE SAVEPOINT");
ReleaseSavepoint(stmt->options);
break;
case TRANS_STMT_ROLLBACK_TO:
RequireTransactionChain(isTopLevel, "ROLLBACK TO SAVEPOINT");
RequireTransactionBlock(isTopLevel, "ROLLBACK TO SAVEPOINT");
RollbackToSavepoint(stmt->options);
/*
@ -536,13 +536,13 @@ standard_ProcessUtility(PlannedStmt *pstmt,
case T_CreateTableSpaceStmt:
/* no event triggers for global objects */
PreventTransactionChain(isTopLevel, "CREATE TABLESPACE");
PreventInTransactionBlock(isTopLevel, "CREATE TABLESPACE");
CreateTableSpace((CreateTableSpaceStmt *) parsetree);
break;
case T_DropTableSpaceStmt:
/* no event triggers for global objects */
PreventTransactionChain(isTopLevel, "DROP TABLESPACE");
PreventInTransactionBlock(isTopLevel, "DROP TABLESPACE");
DropTableSpace((DropTableSpaceStmt *) parsetree);
break;
@ -592,7 +592,7 @@ standard_ProcessUtility(PlannedStmt *pstmt,
case T_CreatedbStmt:
/* no event triggers for global objects */
PreventTransactionChain(isTopLevel, "CREATE DATABASE");
PreventInTransactionBlock(isTopLevel, "CREATE DATABASE");
createdb(pstate, (CreatedbStmt *) parsetree);
break;
@ -611,7 +611,7 @@ standard_ProcessUtility(PlannedStmt *pstmt,
DropdbStmt *stmt = (DropdbStmt *) parsetree;
/* no event triggers for global objects */
PreventTransactionChain(isTopLevel, "DROP DATABASE");
PreventInTransactionBlock(isTopLevel, "DROP DATABASE");
dropdb(stmt->dbname, stmt->missing_ok);
}
break;
@ -690,7 +690,7 @@ standard_ProcessUtility(PlannedStmt *pstmt,
break;
case T_AlterSystemStmt:
PreventTransactionChain(isTopLevel, "ALTER SYSTEM");
PreventInTransactionBlock(isTopLevel, "ALTER SYSTEM");
AlterSystemSetConfigFile((AlterSystemStmt *) parsetree);
break;
@ -756,13 +756,13 @@ standard_ProcessUtility(PlannedStmt *pstmt,
* Since the lock would just get dropped immediately, LOCK TABLE
* outside a transaction block is presumed to be user error.
*/
RequireTransactionChain(isTopLevel, "LOCK TABLE");
RequireTransactionBlock(isTopLevel, "LOCK TABLE");
/* forbidden in parallel mode due to CommandIsReadOnly */
LockTableCommand((LockStmt *) parsetree);
break;
case T_ConstraintsSetStmt:
WarnNoTransactionChain(isTopLevel, "SET CONSTRAINTS");
WarnNoTransactionBlock(isTopLevel, "SET CONSTRAINTS");
AfterTriggerSetState((ConstraintsSetStmt *) parsetree);
break;
@ -808,7 +808,7 @@ standard_ProcessUtility(PlannedStmt *pstmt,
* start-transaction-command calls would not have the
* intended effect!
*/
PreventTransactionChain(isTopLevel,
PreventInTransactionBlock(isTopLevel,
(stmt->kind == REINDEX_OBJECT_SCHEMA) ? "REINDEX SCHEMA" :
(stmt->kind == REINDEX_OBJECT_SYSTEM) ? "REINDEX SYSTEM" :
"REINDEX DATABASE");
@ -1307,7 +1307,7 @@ ProcessUtilitySlow(ParseState *pstate,
List *inheritors = NIL;
if (stmt->concurrent)
PreventTransactionChain(isTopLevel,
PreventInTransactionBlock(isTopLevel,
"CREATE INDEX CONCURRENTLY");
/*
@ -1715,7 +1715,7 @@ ExecDropStmt(DropStmt *stmt, bool isTopLevel)
{
case OBJECT_INDEX:
if (stmt->concurrent)
PreventTransactionChain(isTopLevel,
PreventInTransactionBlock(isTopLevel,
"DROP INDEX CONCURRENTLY");
/* fall through */

10
src/backend/utils/misc/guc.c
View File

@ -7348,7 +7348,7 @@ ExecSetVariableStmt(VariableSetStmt *stmt, bool isTopLevel)
case VAR_SET_VALUE:
case VAR_SET_CURRENT:
if (stmt->is_local)
WarnNoTransactionChain(isTopLevel, "SET LOCAL");
WarnNoTransactionBlock(isTopLevel, "SET LOCAL");
(void) set_config_option(stmt->name,
ExtractSetVariableArgs(stmt),
(superuser() ? PGC_SUSET : PGC_USERSET),
@ -7368,7 +7368,7 @@ ExecSetVariableStmt(VariableSetStmt *stmt, bool isTopLevel)
{
ListCell *head;
WarnNoTransactionChain(isTopLevel, "SET TRANSACTION");
WarnNoTransactionBlock(isTopLevel, "SET TRANSACTION");
foreach(head, stmt->args)
{
@ -7419,7 +7419,7 @@ ExecSetVariableStmt(VariableSetStmt *stmt, bool isTopLevel)
(errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
errmsg("SET LOCAL TRANSACTION SNAPSHOT is not implemented")));
WarnNoTransactionChain(isTopLevel, "SET TRANSACTION");
WarnNoTransactionBlock(isTopLevel, "SET TRANSACTION");
Assert(nodeTag(&con->val) == T_String);
ImportSnapshot(strVal(&con->val));
}
@ -7429,11 +7429,11 @@ ExecSetVariableStmt(VariableSetStmt *stmt, bool isTopLevel)
break;
case VAR_SET_DEFAULT:
if (stmt->is_local)
WarnNoTransactionChain(isTopLevel, "SET LOCAL");
WarnNoTransactionBlock(isTopLevel, "SET LOCAL");
/* fall through */
case VAR_RESET:
if (strcmp(stmt->name, "transaction_isolation") == 0)
WarnNoTransactionChain(isTopLevel, "RESET TRANSACTION");
WarnNoTransactionBlock(isTopLevel, "RESET TRANSACTION");
(void) set_config_option(stmt->name,
NULL,

2
src/backend/utils/time/snapmgr.c
View File

@ -1171,7 +1171,7 @@ ExportSnapshot(Snapshot snapshot)
char pathtmp[MAXPGPATH];
/*
* It's tempting to call RequireTransactionChain here, since it's not very
* It's tempting to call RequireTransactionBlock here, since it's not very
* useful to export a snapshot that will disappear immediately afterwards.
* However, we haven't got enough information to do that, since we don't
* know if we're at top level or not. For example, we could be inside a

2
src/bin/psql/common.c
View File

@ -2047,7 +2047,7 @@ command_no_begin(const char *query)
/*
* Commands not allowed within transactions. The statements checked for
* here should be exactly those that call PreventTransactionChain() in the
* here should be exactly those that call PreventInTransactionBlock() in the
* backend.
*/
if (wordlen == 6 && pg_strncasecmp(query, "vacuum", 6) == 0)

8
src/include/access/xact.h
View File

@ -369,10 +369,10 @@ extern bool IsTransactionBlock(void);
extern bool IsTransactionOrTransactionBlock(void);
extern char TransactionBlockStatusCode(void);
extern void AbortOutOfAnyTransaction(void);
extern void PreventTransactionChain(bool isTopLevel, const char *stmtType);
extern void RequireTransactionChain(bool isTopLevel, const char *stmtType);
extern void WarnNoTransactionChain(bool isTopLevel, const char *stmtType);
extern bool IsInTransactionChain(bool isTopLevel);
extern void PreventInTransactionBlock(bool isTopLevel, const char *stmtType);
extern void RequireTransactionBlock(bool isTopLevel, const char *stmtType);
extern void WarnNoTransactionBlock(bool isTopLevel, const char *stmtType);
extern bool IsInTransactionBlock(bool isTopLevel);
extern void RegisterXactCallback(XactCallback callback, void *arg);
extern void UnregisterXactCallback(XactCallback callback, void *arg);
extern void RegisterSubXactCallback(SubXactCallback callback, void *arg);