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Two-phase commit. Original patch by Heikki Linnakangas, with additional

Browse Source 
hacking by Alvaro Herrera and Tom Lane.
This commit is contained in:
Tom Lane
2005-06-17 22:32:51 +00:00
parent 5495575903
commit d0a89683a3
61 changed files with 4454 additions and 439 deletions
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5
src/backend/tcop/postgres.c
View File

@@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/tcop/postgres.c,v 1.448 2005/06/14 21:04:40 momjian Exp $
* $PostgreSQL: pgsql/src/backend/tcop/postgres.c,v 1.449 2005/06/17 22:32:46 tgl Exp $
*
* NOTES
* this is the "main" module of the postgres backend and
@@ -930,6 +930,7 @@ exec_simple_query(const char *query_string)
TransactionStmt *stmt = (TransactionStmt *) parsetree;
if (stmt->kind == TRANS_STMT_COMMIT ||
stmt->kind == TRANS_STMT_PREPARE ||
stmt->kind == TRANS_STMT_ROLLBACK ||
stmt->kind == TRANS_STMT_ROLLBACK_TO)
allowit = true;
@@ -1261,6 +1262,7 @@ exec_parse_message(const char *query_string, /* string to execute */
TransactionStmt *stmt = (TransactionStmt *) parsetree;
if (stmt->kind == TRANS_STMT_COMMIT ||
stmt->kind == TRANS_STMT_PREPARE ||
stmt->kind == TRANS_STMT_ROLLBACK ||
stmt->kind == TRANS_STMT_ROLLBACK_TO)
allowit = true;
@@ -1751,6 +1753,7 @@ exec_execute_message(const char *portal_name, long max_rows)
is_trans_stmt = true;
if (stmt->kind == TRANS_STMT_COMMIT ||
stmt->kind == TRANS_STMT_PREPARE ||
stmt->kind == TRANS_STMT_ROLLBACK ||
stmt->kind == TRANS_STMT_ROLLBACK_TO)
is_trans_exit = true;

38
src/backend/tcop/utility.c
View File

@@ -10,13 +10,14 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/tcop/utility.c,v 1.236 2005/04/28 21:47:15 tgl Exp $
* $PostgreSQL: pgsql/src/backend/tcop/utility.c,v 1.237 2005/06/17 22:32:46 tgl Exp $
*
*-------------------------------------------------------------------------
*/
#include "postgres.h"
#include "access/heapam.h"
#include "access/twophase.h"
#include "catalog/catalog.h"
#include "catalog/namespace.h"
#include "catalog/pg_shadow.h"
@@ -383,11 +384,11 @@ ProcessUtility(Node *parsetree,
if (strcmp(item->defname, "transaction_isolation") == 0)
SetPGVariable("transaction_isolation",
list_make1(item->arg),
false);
true);
else if (strcmp(item->defname, "transaction_read_only") == 0)
SetPGVariable("transaction_read_only",
list_make1(item->arg),
false);
true);
}
}
break;
@@ -401,6 +402,25 @@ ProcessUtility(Node *parsetree,
}
break;
case TRANS_STMT_PREPARE:
if (!PrepareTransactionBlock(stmt->gid))
{
/* report unsuccessful commit in completionTag */
if (completionTag)
strcpy(completionTag, "ROLLBACK");
}
break;
case TRANS_STMT_COMMIT_PREPARED:
PreventTransactionChain(stmt, "COMMIT PREPARED");
FinishPreparedTransaction(stmt->gid, true);
break;
case TRANS_STMT_ROLLBACK_PREPARED:
PreventTransactionChain(stmt, "ROLLBACK PREPARED");
FinishPreparedTransaction(stmt->gid, false);
break;
case TRANS_STMT_ROLLBACK:
UserAbortTransactionBlock();
break;
@@ -1215,6 +1235,18 @@ CreateCommandTag(Node *parsetree)
tag = "RELEASE";
break;
case TRANS_STMT_PREPARE:
tag = "PREPARE TRANSACTION";
break;
case TRANS_STMT_COMMIT_PREPARED:
tag = "COMMIT PREPARED";
break;
case TRANS_STMT_ROLLBACK_PREPARED:
tag = "ROLLBACK PREPARED";
break;
default:
tag = "???";
break;