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Rename misleading allowEmpty parameter 

Last bit of PR feedback.
pull/1117/head
Jason Petersen 2017-02-28 22:48:00 -07:00
parent 56d4d375c2
commit 047825c6ca
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GPG Key ID: 9F1D3510D110ABA9
1 changed files with 22 additions and 21 deletions
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43
src/backend/distributed/commands/create_distributed_table.c
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@ -76,7 +76,7 @@ int ReplicationModel = REPLICATION_MODEL_COORDINATOR;
static void CreateReferenceTable(Oid distributedRelationId);
static void ConvertToDistributedTable(Oid relationId, char *distributionColumnName,
char distributionMethod, char replicationModel,
uint32 colocationId, bool allowEmpty);
uint32 colocationId, bool requireEmpty);
static char LookupDistributionMethod(Oid distributionMethodOid);
static Oid SupportFunctionForColumn(Var *partitionColumn, Oid accessMethodId,
int16 supportFunctionNumber);
@ -116,7 +116,7 @@ master_create_distributed_table(PG_FUNCTION_ARGS)
char *distributionColumnName = text_to_cstring(distributionColumnText);
char distributionMethod = LookupDistributionMethod(distributionMethodOid);
bool allowEmpty = false;
bool requireEmpty = true;
EnsureCoordinator();
@ -132,7 +132,7 @@ master_create_distributed_table(PG_FUNCTION_ARGS)
ConvertToDistributedTable(distributedRelationId, distributionColumnName,
distributionMethod, REPLICATION_MODEL_COORDINATOR,
INVALID_COLOCATION_ID, allowEmpty);
INVALID_COLOCATION_ID, requireEmpty);
PG_RETURN_VOID();
}
@ -188,7 +188,7 @@ create_distributed_table(PG_FUNCTION_ARGS)
/* if distribution method is not hash, just create partition metadata */
if (distributionMethod != DISTRIBUTE_BY_HASH)
{
bool allowEmpty = false;
bool requireEmpty = true;
if (ReplicationModel != REPLICATION_MODEL_COORDINATOR)
{
@ -199,7 +199,7 @@ create_distributed_table(PG_FUNCTION_ARGS)
ConvertToDistributedTable(relationId, distributionColumnName,
distributionMethod, REPLICATION_MODEL_COORDINATOR,
INVALID_COLOCATION_ID, allowEmpty);
INVALID_COLOCATION_ID, requireEmpty);
PG_RETURN_VOID();
}
@ -245,7 +245,7 @@ CreateReferenceTable(Oid relationId)
List *workerNodeList = WorkerNodeList();
int replicationFactor = list_length(workerNodeList);
char *distributionColumnName = NULL;
bool canLoadData = false;
bool requireEmpty = true;
char relationKind = 0;
EnsureCoordinator();
@ -260,11 +260,11 @@ CreateReferenceTable(Oid relationId)
errdetail("There are no active worker nodes.")));
}
/* we only support data loading for regular (non-foreign) relations */
/* relax empty table requirement for regular (non-foreign) tables */
relationKind = get_rel_relkind(relationId);
if (relationKind == RELKIND_RELATION)
{
canLoadData = true;
requireEmpty = false;
}
colocationId = CreateReferenceTableColocationId();
@ -272,15 +272,15 @@ CreateReferenceTable(Oid relationId)
/* first, convert the relation into distributed relation */
ConvertToDistributedTable(relationId, distributionColumnName,
DISTRIBUTE_BY_NONE, REPLICATION_MODEL_2PC, colocationId,
canLoadData);
requireEmpty);
/* now, create the single shard replicated to all nodes */
CreateReferenceTableShard(relationId);
CreateTableMetadataOnWorkers(relationId);
/* copy over data from regular relations */
if (canLoadData)
/* copy over data for regular relations */
if (relationKind == RELKIND_RELATION)
{
CopyLocalDataIntoShards(relationId);
}
@ -290,7 +290,8 @@ CreateReferenceTable(Oid relationId)
/*
* ConvertToDistributedTable converts the given regular PostgreSQL table into a
* distributed table. First, it checks if the given table can be distributed,
* then it creates related tuple in pg_dist_partition.
* then it creates related tuple in pg_dist_partition. If requireEmpty is true,
* this function errors out when presented with a relation containing rows.
*
* XXX: We should perform more checks here to see if this table is fit for
* partitioning. At a minimum, we should validate the following: (i) this node
@ -301,7 +302,7 @@ CreateReferenceTable(Oid relationId)
static void
ConvertToDistributedTable(Oid relationId, char *distributionColumnName,
char distributionMethod, char replicationModel,
uint32 colocationId, bool allowEmpty)
uint32 colocationId, bool requireEmpty)
{
Relation relation = NULL;
TupleDesc relationDesc = NULL;
@ -351,8 +352,8 @@ ConvertToDistributedTable(Oid relationId, char *distributionColumnName,
"foreign tables.")));
}
/* check that the relation does not contain any rows */
if (!allowEmpty && !LocalTableEmpty(relationId))
/* check that table is empty if that is required */
if (requireEmpty && !LocalTableEmpty(relationId))
{
ereport(ERROR, (errcode(ERRCODE_INVALID_TABLE_DEFINITION),
errmsg("cannot distribute relation \"%s\"",
@ -944,7 +945,7 @@ CreateHashDistributedTable(Oid relationId, char *distributionColumnName,
uint32 colocationId = INVALID_COLOCATION_ID;
Oid sourceRelationId = InvalidOid;
Oid distributionColumnType = InvalidOid;
bool canLoadData = false;
bool requireEmpty = true;
char relationKind = 0;
/* get an access lock on the relation to prevent DROP TABLE and ALTER TABLE */
@ -988,16 +989,16 @@ CreateHashDistributedTable(Oid relationId, char *distributionColumnName,
colocationId = TableColocationId(sourceRelationId);
}
/* we only support data loading for regular (non-foreign) relations */
/* relax empty table requirement for regular (non-foreign) tables */
relationKind = get_rel_relkind(relationId);
if (relationKind == RELKIND_RELATION)
{
canLoadData = true;
requireEmpty = false;
}
/* create distributed table metadata */
ConvertToDistributedTable(relationId, distributionColumnName, DISTRIBUTE_BY_HASH,
ReplicationModel, colocationId, canLoadData);
ReplicationModel, colocationId, requireEmpty);
/* create shards */
if (sourceRelationId != InvalidOid)
@ -1014,8 +1015,8 @@ CreateHashDistributedTable(Oid relationId, char *distributionColumnName,
CreateShardsWithRoundRobinPolicy(relationId, shardCount, replicationFactor);
}
/* copy over data from regular relations */
if (canLoadData)
/* copy over data for regular relations */
if (relationKind == RELKIND_RELATION)
{
CopyLocalDataIntoShards(relationId);
}