Remove PostgreSQL 9.4 support

.travis.yml

@@ -9,7 +9,6 @@ env:
     secure: 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
   matrix:
     - PGVERSION=9.5
-    - PGVERSION=9.4
 before_install:
   - git clone --depth 1 https://github.com/citusdata/tools.git
   - tools/travis/setup_apt.sh

configure

@@ -1915,7 +1915,7 @@ if test -z "$version_num"; then
   as_fn_error $? "Could not detect PostgreSQL version from pg_config." "$LINENO" 5
 fi
 
-if test "$version_num" != '9.4' -a "$version_num" != '9.5'; then
+if test "$version_num" != '9.5'; then
    as_fn_error $? "Citus is not compatible with the detected PostgreSQL version ${version_num}." "$LINENO" 5
 else
    { $as_echo "$as_me:${as_lineno-$LINENO}: building against PostgreSQL $version_num" >&5

configure.in

@@ -36,7 +36,7 @@ if test -z "$version_num"; then
   AC_MSG_ERROR([Could not detect PostgreSQL version from pg_config.])
 fi
 
-if test "$version_num" != '9.4' -a "$version_num" != '9.5'; then
+if test "$version_num" != '9.5'; then
    AC_MSG_ERROR([Citus is not compatible with the detected PostgreSQL version ${version_num}.])
 else
    AC_MSG_NOTICE([building against PostgreSQL $version_num])

src/backend/distributed/executor/multi_router_executor.c

@@ -167,12 +167,6 @@ RouterExecutorStart(QueryDesc *queryDesc, int eflags, Task *task)
 	 */
 	queryDesc->planstate = (PlanState *) makeNode(MaterialState);
 
-#if (PG_VERSION_NUM < 90500)
-
-	/* make sure that upsertQuery is false for versions that UPSERT is not available */
-	Assert(task->upsertQuery == false);
-#endif
-
 	lockMode = CommutativityRuleToLockMode(commandType, task->upsertQuery);
 
 	if (lockMode != NoLock)
@@ -322,14 +316,7 @@ CreateXactParticipantHash(void)
 	info.keysize = sizeof(NodeConnectionKey);
 	info.entrysize = sizeof(NodeConnectionEntry);
 	info.hcxt = TopTransactionContext;
-	hashFlags = (HASH_ELEM | HASH_CONTEXT);
-
-#if (PG_VERSION_NUM >= 90500)
-	hashFlags |= HASH_BLOBS;
-#else
-	hashFlags |= HASH_FUNCTION;
-	info.hash = tag_hash;
-#endif
+	hashFlags = (HASH_ELEM | HASH_CONTEXT | HASH_BLOBS);
 
 	xactParticipantHash = hash_create("citus xact participant hash", 32, &info,
 									  hashFlags);
@@ -1190,17 +1177,13 @@ RouterTransactionCallback(XactEvent event, void *arg)
 
 	switch (event)
 	{
-#if (PG_VERSION_NUM >= 90500)
 		case XACT_EVENT_PARALLEL_COMMIT:
-#endif
 		case XACT_EVENT_COMMIT:
 		{
 			break;
 		}
 
-#if (PG_VERSION_NUM >= 90500)
 		case XACT_EVENT_PARALLEL_ABORT:
-#endif
 		case XACT_EVENT_ABORT:
 		{
 			bool commit = false;
@@ -1221,9 +1204,7 @@ RouterTransactionCallback(XactEvent event, void *arg)
 			break;
 		}
 
-#if (PG_VERSION_NUM >= 90500)
 		case XACT_EVENT_PARALLEL_PRE_COMMIT:
-#endif
 		case XACT_EVENT_PRE_COMMIT:
 		{
 			bool commit = true;

src/backend/distributed/executor/multi_utility.c

@@ -1036,19 +1036,10 @@ IsAlterTableRenameStmt(RenameStmt *renameStmt)
 	{
 		isAlterTableRenameStmt = true;
 	}
-
-#if (PG_VERSION_NUM >= 90500)
 	else if (renameStmt->renameType == OBJECT_TABCONSTRAINT)
 	{
 		isAlterTableRenameStmt = true;
 	}
-#else
-	else if (renameStmt->renameType == OBJECT_CONSTRAINT &&
-			 renameStmt->relationType == OBJECT_TABLE)
-	{
-		isAlterTableRenameStmt = true;
-	}
-#endif
 
 	return isAlterTableRenameStmt;
 }
@@ -1113,21 +1104,12 @@ SetLocalCommitProtocolTo2PC(void)
 	{
 		ereport(DEBUG2, (errmsg("switching to 2PC for the transaction")));
 
-#if (PG_VERSION_NUM >= 90500)
 		set_config_option("citus.multi_shard_commit_protocol",
 						  "2pc",
 						  PGC_USERSET,
 						  PGC_S_SESSION,
 						  GUC_ACTION_LOCAL,
 						  true, 0, false);
-#else
-		set_config_option("citus.multi_shard_commit_protocol",
-						  "2pc",
-						  PGC_USERSET,
-						  PGC_S_SESSION,
-						  GUC_ACTION_LOCAL,
-						  true, 0);
-#endif
 	}
 }
 
@@ -1429,11 +1411,7 @@ CheckCopyPermissions(CopyStmt *copyStatement)
 
 		if (is_from)
 		{
-#if (PG_VERSION_NUM >= 90500)
 			rte->insertedCols = bms_add_member(rte->insertedCols, attno);
-#else
-			rte->modifiedCols = bms_add_member(rte->modifiedCols, attno);
-#endif
 		}
 		else
 		{
@@ -1595,11 +1573,7 @@ ReplicateGrantStmt(Node *parsetree)
 	isFirst = true;
 	foreach(granteeCell, grantStmt->grantees)
 	{
-#if (PG_VERSION_NUM >= 90500)
 		RoleSpec *spec = lfirst(granteeCell);
-#else
-		PrivGrantee *spec = lfirst(granteeCell);
-#endif
 
 		if (!isFirst)
 		{
@@ -1607,7 +1581,6 @@ ReplicateGrantStmt(Node *parsetree)
 		}
 		isFirst = false;
 
-#if (PG_VERSION_NUM >= 90500)
 		if (spec->roletype == ROLESPEC_CSTRING)
 		{
 			appendStringInfoString(&granteesString, quote_identifier(spec->rolename));
@@ -1624,16 +1597,6 @@ ReplicateGrantStmt(Node *parsetree)
 		{
 			appendStringInfoString(&granteesString, "PUBLIC");
 		}
-#else
-		if (spec->rolname)
-		{
-			appendStringInfoString(&granteesString, quote_identifier(spec->rolname));
-		}
-		else
-		{
-			appendStringInfoString(&granteesString, "PUBLIC");
-		}
-#endif
 	}
 
 	/*

src/backend/distributed/master/master_metadata_utility.c

@@ -675,11 +675,7 @@ TableOwner(Oid relationId)
 
 	ReleaseSysCache(tuple);
 
-#if (PG_VERSION_NUM < 90500)
-	return GetUserNameFromId(userId);
-#else
 	return GetUserNameFromId(userId, false);
-#endif
 }
 
 

src/backend/distributed/master/master_node_protocol.c

@@ -40,9 +40,7 @@
 #include "utils/builtins.h"
 #include "utils/fmgroids.h"
 #include "utils/lsyscache.h"
-#if (PG_VERSION_NUM >= 90500)
 #include "utils/ruleutils.h"
-#endif
 #include "utils/syscache.h"
 #include "utils/tqual.h"
 
@@ -646,11 +644,7 @@ GetTableDDLEvents(Oid relationId)
 			Oid constraintId = get_index_constraint(indexId);
 			Assert(constraintId != InvalidOid);
 
-#if (PG_VERSION_NUM >= 90500)
 			statementDef = pg_get_constraintdef_command(constraintId);
-#else
-			statementDef = pg_get_constraintdef_string(constraintId);
-#endif
 		}
 		else
 		{

src/backend/distributed/planner/multi_explain.c

@@ -43,12 +43,6 @@
 #include "utils/snapmgr.h"
 
 
-#if (PG_VERSION_NUM >= 90400 && PG_VERSION_NUM < 90500)
-
-/* Crude hack to avoid changing sizeof(ExplainState) in released branches (explain.c) */
-#define grouping_stack extra->groupingstack
-#endif
-
 /* OR-able flags for ExplainXMLTag() (explain.c) */
 #define X_OPENING 0
 #define X_CLOSING 1

src/backend/distributed/planner/multi_logical_planner.c

@@ -50,9 +50,7 @@ static MultiNode * MultiPlanTree(Query *queryTree);
 static void ErrorIfQueryNotSupported(Query *queryTree);
 static bool HasUnsupportedJoinWalker(Node *node, void *context);
 static void ErrorIfSubqueryNotSupported(Query *subqueryTree);
-#if (PG_VERSION_NUM >= 90500)
 static bool HasTablesample(Query *queryTree);
-#endif
 static bool HasOuterJoin(Query *queryTree);
 static bool HasOuterJoinWalker(Node *node, void *maxJoinLevel);
 static bool HasComplexJoinOrder(Query *queryTree);
@@ -356,9 +354,7 @@ static void
 ErrorIfQueryNotSupported(Query *queryTree)
 {
 	char *errorDetail = NULL;
-#if (PG_VERSION_NUM >= 90500)
 	bool hasTablesample = false;
-#endif
 	bool hasUnsupportedJoin = false;
 	bool hasComplexJoinOrder = false;
 	bool hasComplexRangeTableType = false;
@@ -412,7 +408,6 @@ ErrorIfQueryNotSupported(Query *queryTree)
 		errorDetail = "Distinct clause is currently unsupported";
 	}
 
-#if (PG_VERSION_NUM >= 90500)
 	if (queryTree->groupingSets)
 	{
 		preconditionsSatisfied = false;
@@ -425,7 +420,6 @@ ErrorIfQueryNotSupported(Query *queryTree)
 		preconditionsSatisfied = false;
 		errorDetail = "Tablesample is currently unsupported";
 	}
-#endif
 
 	hasUnsupportedJoin = HasUnsupportedJoinWalker((Node *) queryTree->jointree, NULL);
 	if (hasUnsupportedJoin)
@@ -458,8 +452,6 @@ ErrorIfQueryNotSupported(Query *queryTree)
 }
 
 
-#if (PG_VERSION_NUM >= 90500)
-
 /* HasTablesample returns tree if the query contains tablesample */
 static bool
 HasTablesample(Query *queryTree)
@@ -482,9 +474,6 @@ HasTablesample(Query *queryTree)
 }
 
 
-#endif
-
-
 /*
  * HasUnsupportedJoinWalker returns tree if the query contains an unsupported
  * join type. We currently support inner, left, right, full and anti joins.

src/backend/distributed/planner/multi_master_planner.c

@@ -167,15 +167,9 @@ BuildAggregatePlan(Query *masterQuery, Plan *subPlan)
 	}
 
 	/* finally create the plan */
-#if (PG_VERSION_NUM >= 90500)
 	aggregatePlan = make_agg(NULL, aggregateTargetList, NIL, aggregateStrategy,
 							 &aggregateCosts, groupColumnCount, groupColumnIdArray,
 							 groupColumnOpArray, NIL, rowEstimate, subPlan);
-#else
-	aggregatePlan = make_agg(NULL, aggregateTargetList, NIL, aggregateStrategy,
-							 &aggregateCosts, groupColumnCount, groupColumnIdArray,
-							 groupColumnOpArray, rowEstimate, subPlan);
-#endif
 
 	return aggregatePlan;
 }

src/backend/distributed/planner/multi_router_planner.c

@@ -15,11 +15,7 @@
 
 #include <stddef.h>
 
-#if (PG_VERSION_NUM >= 90500 && PG_VERSION_NUM < 90600)
 #include "access/stratnum.h"
-#else
-#include "access/skey.h"
-#endif
 #include "access/xact.h"
 #include "distributed/citus_clauses.h"
 #include "distributed/citus_nodes.h"
@@ -37,9 +33,7 @@
 #include "distributed/shardinterval_utils.h"
 #include "executor/execdesc.h"
 #include "lib/stringinfo.h"
-#if (PG_VERSION_NUM >= 90500)
 #include "nodes/makefuncs.h"
-#endif
 #include "nodes/nodeFuncs.h"
 #include "nodes/nodes.h"
 #include "nodes/parsenodes.h"
@@ -154,12 +148,10 @@ ErrorIfModifyQueryNotSupported(Query *queryTree)
 	bool hasValuesScan = false;
 	uint32 queryTableCount = 0;
 	bool specifiesPartitionValue = false;
-#if (PG_VERSION_NUM >= 90500)
 	ListCell *setTargetCell = NULL;
 	List *onConflictSet = NIL;
 	Node *arbiterWhere = NULL;
 	Node *onConflictWhere = NULL;
-#endif
 
 	CmdType commandType = queryTree->commandType;
 	Assert(commandType == CMD_INSERT || commandType == CMD_UPDATE ||
@@ -357,7 +349,6 @@ ErrorIfModifyQueryNotSupported(Query *queryTree)
 		}
 	}
 
-#if (PG_VERSION_NUM >= 90500)
 	if (commandType == CMD_INSERT && queryTree->onConflict != NULL)
 	{
 		onConflictSet = queryTree->onConflict->onConflictSet;
@@ -421,7 +412,6 @@ ErrorIfModifyQueryNotSupported(Query *queryTree)
 							   "clause of INSERTs on distributed tables must be marked "
 							   "IMMUTABLE")));
 	}
-#endif
 
 	if (specifiesPartitionValue)
 	{
@@ -689,7 +679,6 @@ RouterModifyTask(Query *originalQuery, Query *query)
 	/* grab shared metadata lock to stop concurrent placement additions */
 	LockShardDistributionMetadata(shardId, ShareLock);
 
-#if (PG_VERSION_NUM >= 90500)
 	if (originalQuery->onConflict != NULL)
 	{
 		RangeTblEntry *rangeTableEntry = NULL;
@@ -705,11 +694,6 @@ RouterModifyTask(Query *originalQuery, Query *query)
 			rangeTableEntry->alias = alias;
 		}
 	}
-#else
-
-	/* always set to false for PG_VERSION_NUM < 90500 */
-	upsertQuery = false;
-#endif
 
 	deparse_shard_query(originalQuery, shardInterval->relationId, shardId, queryString);
 	ereport(DEBUG4, (errmsg("distributed statement: %s", queryString->data)));
@@ -1095,12 +1079,10 @@ MultiRouterPlannableQuery(Query *query, MultiExecutorType taskExecutorType)
 		return false;
 	}
 
-#if (PG_VERSION_NUM >= 90500)
 	if (query->groupingSets)
 	{
 		return false;
 	}
-#endif
 
 	/* only hash partitioned tables are supported */
 	distributedTableId = ExtractFirstDistributedTableId(query);
@@ -1127,12 +1109,10 @@ MultiRouterPlannableQuery(Query *query, MultiExecutorType taskExecutorType)
 		return false;
 	}
 
-#if (PG_VERSION_NUM >= 90500)
 	if (rangeTableEntry->tablesample)
 	{
 		return false;
 	}
-#endif
 
 	if (joinTree == NULL)
 	{

src/backend/distributed/relay/relay_event_utility.c

@@ -341,7 +341,6 @@ RelayEventExtendNames(Node *parseTree, char *schemaName, uint64 shardId)
 		{
 			ReindexStmt *reindexStmt = (ReindexStmt *) parseTree;
 
-#if (PG_VERSION_NUM >= 90500)
 			ReindexObjectType objectType = reindexStmt->kind;
 			if (objectType == REINDEX_OBJECT_TABLE || objectType == REINDEX_OBJECT_INDEX)
 			{
@@ -357,23 +356,6 @@ RelayEventExtendNames(Node *parseTree, char *schemaName, uint64 shardId)
 			{
 				ereport(ERROR, (errmsg("cannot extend name for multi-relation reindex")));
 			}
-#else
-			ObjectType objectType = reindexStmt->kind;
-			if (objectType == OBJECT_TABLE || objectType == OBJECT_INDEX)
-			{
-				char **objectName = &(reindexStmt->relation->relname);
-				char **objectSchemaName = &(reindexStmt->relation->schemaname);
-
-				/* prefix with schema name if it is not added already */
-				SetSchemaNameIfNotExist(objectSchemaName, schemaName);
-
-				AppendShardIdToName(objectName, shardId);
-			}
-			else if (objectType == OBJECT_DATABASE)
-			{
-				ereport(ERROR, (errmsg("cannot extend name for multi-relation reindex")));
-			}
-#endif
 			else
 			{
 				ereport(ERROR, (errmsg("invalid object type in reindex statement"),

src/backend/distributed/test/fake_fdw.c

@@ -34,16 +34,10 @@ static void FakeGetForeignRelSize(PlannerInfo *root, RelOptInfo *baserel,
 								  Oid foreigntableid);
 static void FakeGetForeignPaths(PlannerInfo *root, RelOptInfo *baserel,
 								Oid foreigntableid);
-#if (PG_VERSION_NUM >= 90300 && PG_VERSION_NUM < 90500)
-static ForeignScan * FakeGetForeignPlan(PlannerInfo *root, RelOptInfo *baserel,
-										Oid foreigntableid, ForeignPath *best_path,
-										List *tlist, List *scan_clauses);
-#else
 static ForeignScan * FakeGetForeignPlan(PlannerInfo *root, RelOptInfo *baserel,
 										Oid foreigntableid, ForeignPath *best_path,
 										List *tlist, List *scan_clauses,
 										Plan *outer_plan);
-#endif
 static void FakeBeginForeignScan(ForeignScanState *node, int eflags);
 static TupleTableSlot * FakeIterateForeignScan(ForeignScanState *node);
 static void FakeReScanForeignScan(ForeignScanState *node);
@@ -95,42 +89,25 @@ FakeGetForeignPaths(PlannerInfo *root, RelOptInfo *baserel, Oid foreigntableid)
 	Cost startup_cost = 0;
 	Cost total_cost = startup_cost + baserel->rows;
 
-#if (PG_VERSION_NUM >= 90300 && PG_VERSION_NUM < 90500)
-	add_path(baserel, (Path *) create_foreignscan_path(root, baserel, baserel->rows,
-													   startup_cost, total_cost, NIL,
-													   NULL, NIL));
-#else
 	add_path(baserel, (Path *) create_foreignscan_path(root, baserel, baserel->rows,
 													   startup_cost, total_cost, NIL,
 													   NULL, NULL, NIL));
-#endif
 }
 
 
 /*
  * FakeGetForeignPlan builds a fake foreign plan.
  */
-#if (PG_VERSION_NUM >= 90300 && PG_VERSION_NUM < 90500)
 static ForeignScan *
 FakeGetForeignPlan(PlannerInfo *root, RelOptInfo *baserel, Oid foreigntableid,
-				   ForeignPath *best_path, List *tlist, List *scan_clauses)
-#else
-static ForeignScan *
-FakeGetForeignPlan(PlannerInfo * root, RelOptInfo * baserel, Oid foreigntableid,
-				   ForeignPath * best_path, List * tlist, List * scan_clauses,
-				   Plan * outer_plan)
-#endif
+				   ForeignPath *best_path, List *tlist, List *scan_clauses,
+				   Plan *outer_plan)
 {
 	Index scan_relid = baserel->relid;
 	scan_clauses = extract_actual_clauses(scan_clauses, false);
 
-	/* make_foreignscan has a different signature in 9.3 and 9.4 than in 9.5 */
-#if (PG_VERSION_NUM >= 90300 && PG_VERSION_NUM < 90500)
-	return make_foreignscan(tlist, scan_clauses, scan_relid, NIL, NIL);
-#else
 	return make_foreignscan(tlist, scan_clauses, scan_relid, NIL, NIL, NIL, NIL,
 							outer_plan);
-#endif
 }
 
 

src/backend/distributed/test/prune_shard_list.c

@@ -16,11 +16,7 @@
 
 #include <string.h>
 
-#if (PG_VERSION_NUM >= 90500 && PG_VERSION_NUM < 90600)
 #include "access/stratnum.h"
-#else
-#include "access/skey.h"
-#endif
 #include "catalog/pg_type.h"
 #include "distributed/metadata_cache.h"
 #include "distributed/master_metadata_utility.h"

src/backend/distributed/utils/citus_ruleutils.c

@@ -46,9 +46,7 @@
 #include "utils/fmgroids.h"
 #include "utils/lsyscache.h"
 #include "utils/rel.h"
-#if (PG_VERSION_NUM >= 90500)
 #include "utils/ruleutils.h"
-#endif
 #include "utils/syscache.h"
 #include "utils/typcache.h"
 #include "utils/xml.h"

src/backend/distributed/utils/metadata_cache.c

@@ -725,11 +725,7 @@ CurrentUserName(void)
 {
 	Oid userId = GetUserId();
 
-#if (PG_VERSION_NUM < 90500)
-	return GetUserNameFromId(userId);
-#else
 	return GetUserNameFromId(userId, false);
-#endif
 }
 
 

src/backend/distributed/worker/task_tracker_protocol.c

@@ -265,11 +265,7 @@ CreateJobSchema(StringInfo schemaName)
 	/* build a CREATE SCHEMA statement */
 	CreateSchemaStmt *createSchemaStmt = makeNode(CreateSchemaStmt);
 	createSchemaStmt->schemaname = schemaName->data;
-#if (PG_VERSION_NUM >= 90500)
 	createSchemaStmt->authrole = NULL;
-#else
-	createSchemaStmt->authid = NULL;
-#endif
 	createSchemaStmt->schemaElts = NIL;
 
 	/* allow schema names that start with pg_ */

src/backend/distributed/worker/worker_merge_protocol.c

@@ -369,9 +369,7 @@ CreateTaskTable(StringInfo schemaName, StringInfo relationName,
 	RangeVar *relation = NULL;
 	List *columnDefinitionList = NIL;
 	Oid relationId PG_USED_FOR_ASSERTS_ONLY = InvalidOid;
-#if (PG_VERSION_NUM >= 90500)
 	ObjectAddress relationObject;
-#endif
 
 	Assert(schemaName != NULL);
 	Assert(relationName != NULL);
@@ -386,12 +384,8 @@ CreateTaskTable(StringInfo schemaName, StringInfo relationName,
 
 	createStatement = CreateStatement(relation, columnDefinitionList);
 
-#if (PG_VERSION_NUM >= 90500)
 	relationObject = DefineRelation(createStatement, RELKIND_RELATION, InvalidOid, NULL);
 	relationId = relationObject.objectId;
-#else
-	relationId = DefineRelation(createStatement, RELKIND_RELATION, InvalidOid);
-#endif
 
 	Assert(relationId != InvalidOid);
 	CommandCounterIncrement();

src/bin/csql/command.c

@@ -31,12 +31,6 @@
 #include <sys/stat.h>			/* for stat() */
 #endif
 
-#if (PG_VERSION_NUM >= 90400 && PG_VERSION_NUM < 90500)
-#ifdef USE_SSL
-#include <openssl/ssl.h>
-#endif /* USE_SSL */
-#endif /* (PG_VERSION_NUM >= 90400 && PG_VERSION_NUM < 90500) */
-
 #include "portability/instr_time.h"
 
 #include "libpq-fe.h"
@@ -1898,7 +1892,6 @@ connection_warnings(bool in_startup)
  *
  * Prints information about the current SSL connection, if SSL is in use
  */
-#if (PG_VERSION_NUM >= 90500)
 static void
 printSSLInfo(void)
 {
@@ -1921,34 +1914,6 @@ printSSLInfo(void)
 		   bits ? bits : _("unknown"),
 	  (compression && strcmp(compression, "off") != 0) ? _("on") : _("off"));
 }
-#else
-static void
-printSSLInfo(void)
-{
-#ifdef USE_SSL
-	int			sslbits = -1;
-	SSL		   *ssl;
-
-	ssl = PQgetssl(pset.db);
-	if (!ssl)
-		return;					/* no SSL */
-
-	SSL_get_cipher_bits(ssl, &sslbits);
-	printf(_("SSL connection (protocol: %s, cipher: %s, bits: %d, compression: %s)\n"),
-		   SSL_get_version(ssl), SSL_get_cipher(ssl), sslbits,
-		   SSL_get_current_compression(ssl) ? _("on") : _("off"));
-#else
-
-	/*
-	 * If psql is compiled without SSL but is using a libpq with SSL, we
-	 * cannot figure out the specifics about the connection. But we know it's
-	 * SSL secured.
-	 */
-	if (PQgetssl(pset.db))
-		printf(_("SSL connection (unknown cipher)\n"));
-#endif /* USE_SSL */
-}
-#endif
 
 /*
  * checkWin32Codepage

src/bin/csql/common.h

@@ -19,14 +19,7 @@
 extern bool openQueryOutputFile(const char *fname, FILE **fout, bool *is_pipe);
 extern bool setQFout(const char *fname);
 
-#if (PG_VERSION_NUM >= 90500)
 extern void psql_error(const char *fmt,...) pg_attribute_printf(1, 2);
-#else
-extern void
-psql_error(const char *fmt,...)
-/* This lets gcc check the format string for consistency. */
-__attribute__((format(PG_PRINTF_ATTRIBUTE, 1, 2)));
-#endif
 
 extern void NoticeProcessor(void *arg, const char *message);
 

src/bin/csql/large_obj.c

@@ -12,13 +12,7 @@
 #include "settings.h"
 #include "common.h"
 
-#if (PG_VERSION_NUM >= 90500)
 static void print_lo_result(const char *fmt,...) pg_attribute_printf(1, 2);
-#else
-static void
-print_lo_result(const char *fmt,...)
-__attribute__((format(PG_PRINTF_ATTRIBUTE, 1, 2)));
-#endif
 
 static void
 print_lo_result(const char *fmt,...)

src/include/distributed/multi_router_planner.h

@@ -24,11 +24,9 @@
 #define INVALID_JOB_ID 0
 #define INVALID_TASK_ID 0
 
-#if (PG_VERSION_NUM >= 90500)
-
 /* reserved alias name for UPSERTs */
 #define UPSERT_ALIAS "citus_table_alias"
-#endif
+
 
 extern MultiPlan * MultiRouterPlanCreate(Query *originalQuery, Query *query,
 										 MultiExecutorType taskExecutorType);

src/test/regress/expected/multi_upsert_0.out

@@ -1,332 +0,0 @@
--- this test file aims to test UPSERT feature on Citus
--- note that output of this file for postgresql 9.4 will
--- be full syntax errors, which is expected.
-ALTER SEQUENCE pg_catalog.pg_dist_shardid_seq RESTART 980000;
-ALTER SEQUENCE pg_catalog.pg_dist_jobid_seq RESTART 980000;
-CREATE TABLE upsert_test
-(
-	part_key int UNIQUE,
-	other_col int,
-	third_col int
-);
--- distribute the table and create shards
-SELECT master_create_distributed_table('upsert_test', 'part_key', 'hash');
- master_create_distributed_table 
----------------------------------
- 
-(1 row)
-
-SELECT master_create_worker_shards('upsert_test', '4', '2');
- master_create_worker_shards 
------------------------------
- 
-(1 row)
-
--- do a regular insert
-INSERT INTO upsert_test (part_key, other_col) VALUES (1, 1);
--- observe that there is a conflict and the following query does nothing
-INSERT INTO upsert_test (part_key, other_col) VALUES (1, 1) ON CONFLICT DO NOTHING;
-ERROR:  syntax error at or near "ON"
-LINE 1: ...O upsert_test (part_key, other_col) VALUES (1, 1) ON CONFLIC...
-                                                             ^
--- same as the above with different syntax
-INSERT INTO upsert_test (part_key, other_col) VALUES (1, 1) ON CONFLICT (part_key) DO NOTHING;
-ERROR:  syntax error at or near "ON"
-LINE 1: ...O upsert_test (part_key, other_col) VALUES (1, 1) ON CONFLIC...
-                                                             ^
---again the same query with another syntax
-INSERT INTO upsert_test (part_key, other_col) VALUES (1, 1) ON CONFLICT ON CONSTRAINT upsert_test_part_key_key DO NOTHING;
-ERROR:  syntax error at or near "ON"
-LINE 1: ...O upsert_test (part_key, other_col) VALUES (1, 1) ON CONFLIC...
-                                                             ^
--- now, update the columns
-INSERT INTO upsert_test (part_key, other_col) VALUES (1, 1)
-	ON CONFLICT (part_key) DO UPDATE SET other_col = 2,  third_col = 4;
-ERROR:  syntax error at or near "ON"
-LINE 2:  ON CONFLICT (part_key) DO UPDATE SET other_col = 2,  third_...
-         ^
--- see the results
-SELECT * FROM upsert_test;
- part_key | other_col | third_col 
-----------+-----------+-----------
-        1 |         1 |          
-(1 row)
-
--- use a WHERE clause, so that SET doesn't have an affect
-INSERT INTO upsert_test (part_key, other_col) VALUES (1, 1) ON CONFLICT (part_key)
-	DO UPDATE SET other_col = 30 WHERE upsert_test.other_col = 3;
-ERROR:  syntax error at or near "ON"
-LINE 1: ...O upsert_test (part_key, other_col) VALUES (1, 1) ON CONFLIC...
-                                                             ^
--- see the results
-SELECT * FROM upsert_test;
- part_key | other_col | third_col 
-----------+-----------+-----------
-        1 |         1 |          
-(1 row)
-
--- use a WHERE clause, that hits the row and updates it
-INSERT INTO upsert_test (part_key, other_col) VALUES (1, 1) ON CONFLICT (part_key)
-	DO UPDATE SET other_col = 30 WHERE upsert_test.other_col = 2;
-ERROR:  syntax error at or near "ON"
-LINE 1: ...O upsert_test (part_key, other_col) VALUES (1, 1) ON CONFLIC...
-                                                             ^
--- see the results
-SELECT * FROM upsert_test;
- part_key | other_col | third_col 
-----------+-----------+-----------
-        1 |         1 |          
-(1 row)
-
--- use two elements in the WHERE, that doesn't hit the row and updates it
-INSERT INTO upsert_test (part_key, other_col) VALUES (1, 1) ON CONFLICT (part_key)
-	DO UPDATE SET other_col = 30 WHERE upsert_test.other_col = 2 AND upsert_test.other_col = 3;
-ERROR:  syntax error at or near "ON"
-LINE 1: ...O upsert_test (part_key, other_col) VALUES (1, 1) ON CONFLIC...
-                                                             ^
--- use EXCLUDED keyword
-INSERT INTO upsert_test (part_key, other_col, third_col) VALUES (1, 1, 100) ON CONFLICT (part_key)
-	DO UPDATE SET other_col = EXCLUDED.third_col;
-ERROR:  syntax error at or near "ON"
-LINE 1: ...art_key, other_col, third_col) VALUES (1, 1, 100) ON CONFLIC...
-                                                             ^
--- see the results
-SELECT * FROM upsert_test;
- part_key | other_col | third_col 
-----------+-----------+-----------
-        1 |         1 |          
-(1 row)
-
--- now update multiple columns with ALIAS table and reference to the row itself
-INSERT INTO upsert_test as ups_test (part_key) VALUES (1)
-	ON CONFLICT (part_key) DO UPDATE SET other_col = ups_test.other_col + 50, third_col = 200;
-ERROR:  syntax error at or near "as"
-LINE 1: INSERT INTO upsert_test as ups_test (part_key) VALUES (1)
-                                ^
--- see the results
-SELECT * FROM upsert_test;
- part_key | other_col | third_col 
-----------+-----------+-----------
-        1 |         1 |          
-(1 row)
-
--- now, do some more complex assignments
-INSERT INTO upsert_test (part_key, other_col) VALUES (1, 1) ON CONFLICT (part_key)
-		DO UPDATE SET other_col = upsert_test.other_col + 1,
-		third_col = upsert_test.third_col + (EXCLUDED.part_key + EXCLUDED.other_col) + 670;
-ERROR:  syntax error at or near "ON"
-LINE 1: ...O upsert_test (part_key, other_col) VALUES (1, 1) ON CONFLIC...
-                                                             ^
--- see the results
-SELECT * FROM upsert_test;
- part_key | other_col | third_col 
-----------+-----------+-----------
-        1 |         1 |          
-(1 row)
-
--- now, WHERE clause also has table reference
-INSERT INTO upsert_test as ups_test (part_key, other_col) VALUES (1, 1) ON CONFLICT (part_key)
-		DO UPDATE SET other_col = (ups_test.other_col + ups_test.third_col + (EXCLUDED.part_key + EXCLUDED.other_col)) % 15
-		WHERE ups_test.third_col < 1000 + ups_test.other_col;
-ERROR:  syntax error at or near "as"
-LINE 1: INSERT INTO upsert_test as ups_test (part_key, other_col) VA...
-                                ^
--- see the results
-SELECT * FROM upsert_test;
- part_key | other_col | third_col 
-----------+-----------+-----------
-        1 |         1 |          
-(1 row)
-
--- Test upsert, with returning:
-INSERT INTO upsert_test (part_key, other_col) VALUES (2, 2)
-	ON CONFLICT (part_key) DO UPDATE SET other_col = 3
-        RETURNING *;
-ERROR:  syntax error at or near "ON"
-LINE 2:  ON CONFLICT (part_key) DO UPDATE SET other_col = 3
-         ^
-INSERT INTO upsert_test (part_key, other_col) VALUES (2, 2)
-	ON CONFLICT (part_key) DO UPDATE SET other_col = 3
-        RETURNING *;
-ERROR:  syntax error at or near "ON"
-LINE 2:  ON CONFLICT (part_key) DO UPDATE SET other_col = 3
-         ^
--- create another table
-CREATE TABLE upsert_test_2
-(
-	part_key int,
-	other_col int,
-	third_col int,
-	PRIMARY KEY (part_key, other_col)
-);
--- distribute the table and create shards
-SELECT master_create_distributed_table('upsert_test_2', 'part_key', 'hash');
- master_create_distributed_table 
----------------------------------
- 
-(1 row)
-
-SELECT master_create_worker_shards('upsert_test_2', '4', '2');
- master_create_worker_shards 
------------------------------
- 
-(1 row)
-
--- now show that Citus works with multiple columns as the PRIMARY KEY, including the partiton key
-INSERT INTO upsert_test_2 (part_key, other_col) VALUES (1, 1);
-INSERT INTO upsert_test_2 (part_key, other_col) VALUES (1, 1) ON CONFLICT (part_key, other_col) DO NOTHING;
-ERROR:  syntax error at or near "ON"
-LINE 1: ...upsert_test_2 (part_key, other_col) VALUES (1, 1) ON CONFLIC...
-                                                             ^
--- this errors out since there is no unique constraint on partition key
-INSERT INTO upsert_test_2 (part_key, other_col) VALUES (1, 1) ON CONFLICT (part_key) DO NOTHING;
-ERROR:  syntax error at or near "ON"
-LINE 1: ...upsert_test_2 (part_key, other_col) VALUES (1, 1) ON CONFLIC...
-                                                             ^
--- create another table
-CREATE TABLE upsert_test_3
-(
-	part_key int,
-	count int
-);
--- note that this is not a unique index
-CREATE INDEX idx_ups_test ON upsert_test_3(part_key);
--- distribute the table and create shards
-SELECT master_create_distributed_table('upsert_test_3', 'part_key', 'hash');
- master_create_distributed_table 
----------------------------------
- 
-(1 row)
-
-SELECT master_create_worker_shards('upsert_test_3', '4', '2');
- master_create_worker_shards 
------------------------------
- 
-(1 row)
-
--- since there are no unique indexes, error-out
-INSERT INTO upsert_test_3 VALUES (1, 0) ON CONFLICT(part_key) DO UPDATE SET count = upsert_test_3.count + 1;
-ERROR:  syntax error at or near "ON"
-LINE 1: INSERT INTO upsert_test_3 VALUES (1, 0) ON CONFLICT(part_key...
-                                                ^
--- create another table
-CREATE TABLE upsert_test_4
-(
-	part_key int UNIQUE,
-	count int
-);
--- distribute the table and create shards
-SELECT master_create_distributed_table('upsert_test_4', 'part_key', 'hash');
- master_create_distributed_table 
----------------------------------
- 
-(1 row)
-
-SELECT master_create_worker_shards('upsert_test_4', '4', '2');
- master_create_worker_shards 
------------------------------
- 
-(1 row)
-
--- a single row insert
-INSERT INTO upsert_test_4 VALUES (1, 0);
--- show a simple count example use case
-INSERT INTO upsert_test_4 VALUES (1, 0) ON CONFLICT(part_key) DO UPDATE SET count = upsert_test_4.count + 1;
-ERROR:  syntax error at or near "ON"
-LINE 1: INSERT INTO upsert_test_4 VALUES (1, 0) ON CONFLICT(part_key...
-                                                ^
-INSERT INTO upsert_test_4 VALUES (1, 0) ON CONFLICT(part_key) DO UPDATE SET count = upsert_test_4.count + 1;
-ERROR:  syntax error at or near "ON"
-LINE 1: INSERT INTO upsert_test_4 VALUES (1, 0) ON CONFLICT(part_key...
-                                                ^
-INSERT INTO upsert_test_4 VALUES (1, 0) ON CONFLICT(part_key) DO UPDATE SET count = upsert_test_4.count + 1;
-ERROR:  syntax error at or near "ON"
-LINE 1: INSERT INTO upsert_test_4 VALUES (1, 0) ON CONFLICT(part_key...
-                                                ^
-INSERT INTO upsert_test_4 VALUES (1, 0) ON CONFLICT(part_key) DO UPDATE SET count = upsert_test_4.count + 1;
-ERROR:  syntax error at or near "ON"
-LINE 1: INSERT INTO upsert_test_4 VALUES (1, 0) ON CONFLICT(part_key...
-                                                ^
-INSERT INTO upsert_test_4 VALUES (1, 0) ON CONFLICT(part_key) DO UPDATE SET count = upsert_test_4.count + 1;
-ERROR:  syntax error at or near "ON"
-LINE 1: INSERT INTO upsert_test_4 VALUES (1, 0) ON CONFLICT(part_key...
-                                                ^
-INSERT INTO upsert_test_4 VALUES (1, 0) ON CONFLICT(part_key) DO UPDATE SET count = upsert_test_4.count + 1;
-ERROR:  syntax error at or near "ON"
-LINE 1: INSERT INTO upsert_test_4 VALUES (1, 0) ON CONFLICT(part_key...
-                                                ^
--- now see the results
-SELECT * FROM upsert_test_4;
- part_key | count 
-----------+-------
-        1 |     0
-(1 row)
-
--- now test dropped columns
-CREATE TABLE dropcol_distributed(key int primary key, drop1 int, keep1 text, drop2 numeric, keep2 float);
-SELECT master_create_distributed_table('dropcol_distributed', 'key', 'hash');
- master_create_distributed_table 
----------------------------------
- 
-(1 row)
-
-SELECT master_create_worker_shards('dropcol_distributed', 4, 1);
- master_create_worker_shards 
------------------------------
- 
-(1 row)
-
-INSERT INTO dropcol_distributed AS dropcol (key, keep1, keep2) VALUES (1, '5', 5) ON CONFLICT(key)
-	DO UPDATE SET keep1 = dropcol.keep1;
-ERROR:  syntax error at or near "AS"
-LINE 1: INSERT INTO dropcol_distributed AS dropcol (key, keep1, keep...
-                                        ^
-ALTER TABLE dropcol_distributed DROP COLUMN drop2;
-INSERT INTO dropcol_distributed (key, keep1, keep2) VALUES (1, '5', 5) ON CONFLICT(key)
-	DO UPDATE SET keep1 = dropcol_distributed.keep1;
-ERROR:  syntax error at or near "ON"
-LINE 1: ...istributed (key, keep1, keep2) VALUES (1, '5', 5) ON CONFLIC...
-                                                             ^
-ALTER TABLE dropcol_distributed DROP COLUMN keep2;
-INSERT INTO dropcol_distributed AS dropcol (key, keep1) VALUES (1, '5') ON CONFLICT(key)
-	DO UPDATE SET keep1 = dropcol.keep1;
-ERROR:  syntax error at or near "AS"
-LINE 1: INSERT INTO dropcol_distributed AS dropcol (key, keep1) VALU...
-                                        ^
-ALTER TABLE dropcol_distributed DROP COLUMN drop1;
-INSERT INTO dropcol_distributed AS dropcol (key, keep1) VALUES (1, '5') ON CONFLICT(key)
-	DO UPDATE SET keep1 = dropcol.keep1;
-ERROR:  syntax error at or near "AS"
-LINE 1: INSERT INTO dropcol_distributed AS dropcol (key, keep1) VALU...
-                                        ^
--- below we test the cases that Citus does not support
--- subquery in the SET clause
-INSERT INTO upsert_test (part_key, other_col) VALUES (1, 1) ON CONFLICT (part_key) DO
-	UPDATE SET other_col = (SELECT count(*) from upsert_test);
-ERROR:  syntax error at or near "ON"
-LINE 1: ...O upsert_test (part_key, other_col) VALUES (1, 1) ON CONFLIC...
-                                                             ^
--- non mutable function call in the SET
-INSERT INTO upsert_test (part_key, other_col) VALUES (1, 1) ON CONFLICT (part_key) DO
-	UPDATE SET other_col = random()::int;
-ERROR:  syntax error at or near "ON"
-LINE 1: ...O upsert_test (part_key, other_col) VALUES (1, 1) ON CONFLIC...
-                                                             ^
--- non mutable function call in the WHERE
-INSERT INTO upsert_test (part_key, other_col) VALUES (1, 1) ON CONFLICT (part_key) DO
-	UPDATE SET other_col = 5 WHERE upsert_test.other_col = random()::int;
-ERROR:  syntax error at or near "ON"
-LINE 1: ...O upsert_test (part_key, other_col) VALUES (1, 1) ON CONFLIC...
-                                                             ^
--- non mutable function call in the arbiter WHERE
-INSERT INTO upsert_test (part_key, other_col) VALUES (1, 1) ON CONFLICT (part_key)  WHERE part_key = random()::int
-	DO UPDATE SET other_col = 5;
-ERROR:  syntax error at or near "ON"
-LINE 1: ...O upsert_test (part_key, other_col) VALUES (1, 1) ON CONFLIC...
-                                                             ^
--- error out on attempt to update the partition key
-INSERT INTO upsert_test (part_key, other_col) VALUES (1, 1) ON CONFLICT (part_key) DO
-	UPDATE SET part_key = 15;
-ERROR:  syntax error at or near "ON"
-LINE 1: ...O upsert_test (part_key, other_col) VALUES (1, 1) ON CONFLIC...
-                                                             ^