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array_offset() and array_offsets()

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These functions return the offset position or positions of a value in an
array.

Author: Pavel Stěhule
Reviewed by: Jim Nasby
This commit is contained in:
Alvaro Herrera
2015-03-18 16:01:34 -03:00
parent f9dead5624
commit 13dbc7a824
10 changed files with 525 additions and 8 deletions
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20
src/backend/utils/adt/arrayfuncs.c
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@ -3989,7 +3989,7 @@ arraycontained(PG_FUNCTION_ARGS)
* The passed-in array must remain valid for the lifetime of the iterator.
*/
ArrayIterator
array_create_iterator(ArrayType *arr, int slice_ndim)
array_create_iterator(ArrayType *arr, int slice_ndim, ArrayMetaState *mstate)
{
ArrayIterator iterator = palloc0(sizeof(ArrayIteratorData));
@ -4006,10 +4006,20 @@ array_create_iterator(ArrayType *arr, int slice_ndim)
iterator->arr = arr;
iterator->nullbitmap = ARR_NULLBITMAP(arr);
iterator->nitems = ArrayGetNItems(ARR_NDIM(arr), ARR_DIMS(arr));
get_typlenbyvalalign(ARR_ELEMTYPE(arr),
&iterator->typlen,
&iterator->typbyval,
&iterator->typalign);
if (mstate != NULL)
{
Assert(mstate->element_type == ARR_ELEMTYPE(arr));
iterator->typlen = mstate->typlen;
iterator->typbyval = mstate->typbyval;
iterator->typalign = mstate->typalign;
}
else
get_typlenbyvalalign(ARR_ELEMTYPE(arr),
&iterator->typlen,
&iterator->typbyval,
&iterator->typalign);
/*
* Remember the slicing parameters.