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Remove old worker_hash_partition_table API

pull/2492/head
Marco Slot 2018-11-24 03:40:09 +01:00
parent 5a63deab2e
commit 1ec5b6c890
2 changed files with 12 additions and 85 deletions
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1
src/backend/distributed/citus--8.0-10--8.0-11.sql
View File

@ -2,6 +2,7 @@
SET search_path = 'pg_catalog';
-- Deprecated functions
DROP FUNCTION IF EXISTS worker_hash_partition_table(bigint,integer,text,text,oid,integer);
DROP FUNCTION IF EXISTS worker_foreign_file_path(text);
DROP FUNCTION IF EXISTS worker_find_block_local_path(bigint,text[]);
DROP FUNCTION IF EXISTS worker_fetch_query_results_file(bigint,integer,integer,text,integer);

86
src/backend/distributed/worker/worker_partition_protocol.c
View File

@ -80,7 +80,6 @@ static void OutputBinaryHeaders(FileOutputStream *partitionFileArray, uint32 fil
static void OutputBinaryFooters(FileOutputStream *partitionFileArray, uint32 fileCount);
static uint32 RangePartitionId(Datum partitionValue, const void *context);
static uint32 HashPartitionId(Datum partitionValue, const void *context);
static uint32 HashPartitionIdViaDeprecatedAPI(Datum partitionValue, const void *context);
static StringInfo UserPartitionFilename(StringInfo directoryName, uint32 partitionId);
static bool FileIsLink(char *filename, struct stat filestat);
@ -187,71 +186,32 @@ worker_hash_partition_table(PG_FUNCTION_ARGS)
text *filterQueryText = PG_GETARG_TEXT_P(2);
text *partitionColumnText = PG_GETARG_TEXT_P(3);
Oid partitionColumnType = PG_GETARG_OID(4);
ArrayType *hashRangeObject = NULL;
ArrayType *hashRangeObject = PG_GETARG_ARRAYTYPE_P(5);
const char *filterQuery = text_to_cstring(filterQueryText);
const char *partitionColumn = text_to_cstring(partitionColumnText);
HashPartitionContext *partitionContext = NULL;
FmgrInfo *hashFunction = NULL;
Datum *hashRangeArray = NULL;
int32 partitionCount = 0;
Datum *hashRangeArray = DeconstructArrayObject(hashRangeObject);
int32 partitionCount = ArrayObjectCount(hashRangeObject);
StringInfo taskDirectory = NULL;
StringInfo taskAttemptDirectory = NULL;
FileOutputStream *partitionFileArray = NULL;
uint32 fileCount = 0;
uint32 (*HashPartitionIdFunction)(Datum, const void *);
Oid partitionBucketOid = InvalidOid;
uint32 (*hashPartitionIdFunction)(Datum, const void *);
CheckCitusVersion(ERROR);
partitionContext = palloc0(sizeof(HashPartitionContext));
/*
* We do this hack for backward compatibility.
*
* In the older versions of Citus, worker_hash_partition_table()'s 6th parameter
* was an integer which denoted the number of buckets to split the shard's data.
* In the later versions of Citus, the sixth parameter is changed to get an array
* of shard ranges, which is used as the ranges to split the shard's data.
*
* Keeping this value is important if the coordinator's Citus version is <= 7.3
* and worker Citus version is > 7.3.
*/
partitionBucketOid = get_fn_expr_argtype(fcinfo->flinfo, 5);
if (partitionBucketOid == INT4ARRAYOID)
{
hashRangeObject = PG_GETARG_ARRAYTYPE_P(5);
hashRangeArray = DeconstructArrayObject(hashRangeObject);
partitionCount = ArrayObjectCount(hashRangeObject);
partitionContext->syntheticShardIntervalArray =
SyntheticShardIntervalArrayForShardMinValues(hashRangeArray, partitionCount);
partitionContext->hasUniformHashDistribution =
HasUniformHashDistribution(partitionContext->syntheticShardIntervalArray,
partitionCount);
HashPartitionIdFunction = &HashPartitionId;
}
else if (partitionBucketOid == INT4OID)
{
partitionCount = PG_GETARG_UINT32(5);
partitionContext->syntheticShardIntervalArray =
GenerateSyntheticShardIntervalArray(partitionCount);
partitionContext->hasUniformHashDistribution = true;
HashPartitionIdFunction = &HashPartitionIdViaDeprecatedAPI;
}
else
{
/* we should never get other type of parameters */
ereport(ERROR, (errmsg("unexpected parameter for "
"worker_hash_partition_table()")));
}
hashPartitionIdFunction = &HashPartitionId;
/* use column's type information to get the hashing function */
hashFunction = GetFunctionInfo(partitionColumnType, HASH_AM_OID, HASHSTANDARD_PROC);
@ -278,7 +238,7 @@ worker_hash_partition_table(PG_FUNCTION_ARGS)
/* call the partitioning function that does the actual work */
FilterAndPartitionTable(filterQuery, partitionColumn, partitionColumnType,
HashPartitionIdFunction, (const void *) partitionContext,
hashPartitionIdFunction, (const void *) partitionContext,
partitionFileArray, fileCount);
/* close partition files and atomically rename (commit) them */
@ -1318,37 +1278,3 @@ HashPartitionId(Datum partitionValue, const void *context)
return hashPartitionId;
}
/*
* HashPartitionIdViaDeprecatedAPI is required to provide backward compatibility
* between the Citus versions 7.4 and older versions.
*
* HashPartitionIdViaDeprecatedAPI determines the partition number for the given data value
* using hash partitioning. More specifically, the function returns zero if the
* given data value is null. If not, the function applies the standard Postgres
* hashing function for the given data type, and mods the hashed result with the
* number of partitions. The function then returns the modded number as the
* partition number.
*
* Note that any changes to PostgreSQL's hashing functions will reshuffle the
* entire distribution created by this function. For a discussion of this issue,
* see Google "PL/Proxy Users: Hash Functions Have Changed in PostgreSQL 8.4."
*/
static uint32
HashPartitionIdViaDeprecatedAPI(Datum partitionValue, const void *context)
{
HashPartitionContext *hashPartitionContext = (HashPartitionContext *) context;
FmgrInfo *hashFunction = hashPartitionContext->hashFunction;
uint32 partitionCount = hashPartitionContext->partitionCount;
Datum hashDatum = 0;
uint32 hashResult = 0;
uint32 hashPartitionId = 0;
/* hash functions return unsigned 32-bit integers */
hashDatum = FunctionCall1(hashFunction, partitionValue);
hashResult = DatumGetUInt32(hashDatum);
hashPartitionId = (hashResult % partitionCount);
return hashPartitionId;
}