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Simplify and encapsulate tuple routing support code.

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Instead of having ExecSetupPartitionTupleRouting return multiple out
parameters, have it return a pointer to a structure containing all of
those different things.  Also, provide and use a cleanup function,
ExecCleanupTupleRouting, instead of cleaning up all of the resources
allocated by ExecSetupPartitionTupleRouting individually.

Amit Khandekar, reviewed by Amit Langote, David Rowley, and me

Discussion: http://postgr.es/m/CAJ3gD9fWfxgKC+PfJZF3hkgAcNOy-LpfPxVYitDEXKHjeieWQQ@mail.gmail.com
This commit is contained in:
Robert Haas
2018-01-04 15:48:15 -05:00
parent d3fb72ea6d
commit cc6337d2fe
5 changed files with 153 additions and 189 deletions
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47
src/include/executor/execPartition.h
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@@ -49,18 +49,47 @@ typedef struct PartitionDispatchData
typedef struct PartitionDispatchData *PartitionDispatch;
extern void ExecSetupPartitionTupleRouting(ModifyTableState *mtstate,
Relation rel,
Index resultRTindex,
EState *estate,
PartitionDispatch **pd,
ResultRelInfo ***partitions,
TupleConversionMap ***tup_conv_maps,
TupleTableSlot **partition_tuple_slot,
int *num_parted, int *num_partitions);
/*-----------------------
* PartitionTupleRouting - Encapsulates all information required to execute
* tuple-routing between partitions.
*
* partition_dispatch_info Array of PartitionDispatch objects with one
* entry for every partitioned table in the
* partition tree.
* num_dispatch number of partitioned tables in the partition
* tree (= length of partition_dispatch_info[])
* partitions Array of ResultRelInfo* objects with one entry
* for every leaf partition in the partition tree.
* num_partitions Number of leaf partitions in the partition tree
* (= 'partitions' array length)
* partition_tupconv_maps Array of TupleConversionMap objects with one
* entry for every leaf partition (required to
* convert input tuple based on the root table's
* rowtype to a leaf partition's rowtype after
* tuple routing is done)
* partition_tuple_slot TupleTableSlot to be used to manipulate any
* given leaf partition's rowtype after that
* partition is chosen for insertion by
* tuple-routing.
*-----------------------
*/
typedef struct PartitionTupleRouting
{
PartitionDispatch *partition_dispatch_info;
int num_dispatch;
ResultRelInfo **partitions;
int num_partitions;
TupleConversionMap **partition_tupconv_maps;
TupleTableSlot *partition_tuple_slot;
} PartitionTupleRouting;
extern PartitionTupleRouting *ExecSetupPartitionTupleRouting(ModifyTableState *mtstate,
Relation rel, Index resultRTindex,
EState *estate);
extern int ExecFindPartition(ResultRelInfo *resultRelInfo,
PartitionDispatch *pd,
TupleTableSlot *slot,
EState *estate);
extern void ExecCleanupTupleRouting(PartitionTupleRouting *proute);
#endif /* EXECPARTITION_H */