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Modify array operations to include array's element type OID in the

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array header, and to compute sizing and alignment of array elements
the same way normal tuple access operations do --- viz, using the
tupmacs.h macros att_addlength and att_align.  This makes the world
safe for arrays of cstrings or intervals, and should make it much
easier to write array-type-polymorphic functions; as examples see
the cleanups of array_out and contrib/array_iterator.  By Joe Conway
and Tom Lane.
This commit is contained in:
Tom Lane
2002-08-26 17:54:02 +00:00
parent 8009c27592
commit 5cabcfccce
38 changed files with 559 additions and 435 deletions
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15
src/backend/utils/adt/float.c
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@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/utils/adt/float.c,v 1.79 2002/06/20 20:29:37 momjian Exp $
* $Header: /cvsroot/pgsql/src/backend/utils/adt/float.c,v 1.80 2002/08/26 17:53:58 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -61,6 +61,7 @@
#include <ieeefp.h>
#endif
#include "catalog/pg_type.h"
#include "fmgr.h"
#include "utils/array.h"
#include "utils/builtins.h"
@ -1480,9 +1481,9 @@ check_float8_array(ArrayType *transarray, const char *caller)
* don't need to use deconstruct_array() since the array data is just
* going to look like a C array of 3 float8 values.
*/
if (ARR_SIZE(transarray) != (ARR_OVERHEAD(1) + 3 * sizeof(float8)) ||
ARR_NDIM(transarray) != 1 ||
ARR_DIMS(transarray)[0] != 3)
if (ARR_NDIM(transarray) != 1 ||
ARR_DIMS(transarray)[0] != 3 ||
ARR_ELEMTYPE(transarray) != FLOAT8OID)
elog(ERROR, "%s: expected 3-element float8 array", caller);
return (float8 *) ARR_DATA_PTR(transarray);
}
@ -1513,7 +1514,8 @@ float8_accum(PG_FUNCTION_ARGS)
transdatums[2] = Float8GetDatumFast(sumX2);
result = construct_array(transdatums, 3,
false /* float8 byval */ , sizeof(float8), 'd');
FLOAT8OID,
sizeof(float8), false /*float8 byval*/, 'd');
PG_RETURN_ARRAYTYPE_P(result);
}
@ -1548,7 +1550,8 @@ float4_accum(PG_FUNCTION_ARGS)
transdatums[2] = Float8GetDatumFast(sumX2);
result = construct_array(transdatums, 3,
false /* float8 byval */ , sizeof(float8), 'd');
FLOAT8OID,
sizeof(float8), false /*float8 byval*/, 'd');
PG_RETURN_ARRAYTYPE_P(result);
}