#include "postgres.h"
#include "utils/expandeddatum.h"
#include "utils/memutils.h"

Include dependency graph for expandeddatum.c:

Functions
ExpandedObjectHeader *	DatumGetEOHP (Datum d)

void	EOH_init_header (ExpandedObjectHeader eohptr, const ExpandedObjectMethods methods, MemoryContext obj_context)

Size	EOH_get_flat_size (ExpandedObjectHeader *eohptr)

void	EOH_flatten_into (ExpandedObjectHeader eohptr, void result, Size allocated_size)

Datum	MakeExpandedObjectReadOnlyInternal (Datum d)

Datum	TransferExpandedObject (Datum d, MemoryContext new_parent)

void	DeleteExpandedObject (Datum d)

Function Documentation

◆ DatumGetEOHP()

ExpandedObjectHeader* DatumGetEOHP ( Datum d )

Definition at line 29 of file expandeddatum.c.

 {
     varattrib_1b_e *datum = (varattrib_1b_e *) DatumGetPointer(d);
     varatt_expanded ptr;
  
     Assert(VARATT_IS_EXTERNAL_EXPANDED(datum));
     memcpy(&ptr, VARDATA_EXTERNAL(datum), sizeof(ptr));
     Assert(VARATT_IS_EXPANDED_HEADER(ptr.eohptr));
     return ptr.eohptr;
 }

References Assert, DatumGetPointer(), varatt_expanded::eohptr, VARATT_IS_EXPANDED_HEADER, VARATT_IS_EXTERNAL_EXPANDED, and VARDATA_EXTERNAL.

Referenced by advance_windowaggregate(), advance_windowaggregate_base(), array_get_element_expanded(), coerce_function_result_tuple(), construct_empty_expanded_array(), datumCopy(), datumEstimateSpace(), DatumGetAnyArrayP(), DatumGetExpandedArray(), DatumGetExpandedArrayX(), DatumGetExpandedRecord(), datumSerialize(), DeleteExpandedObject(), detoast_external_attr(), exec_move_row_from_datum(), ExecAggCopyTransValue(), ExecEvalFieldSelect(), expand_array(), fill_val(), heap_compute_data_size(), MakeExpandedObjectReadOnlyInternal(), plpgsql_exec_trigger(), toast_datum_size(), toast_raw_datum_size(), TransferExpandedObject(), and tts_virtual_materialize().

◆ DeleteExpandedObject()

void DeleteExpandedObject ( Datum d )

Definition at line 136 of file expandeddatum.c.

 {
     ExpandedObjectHeader *eohptr = DatumGetEOHP(d);
  
     /* Assert caller gave a R/W pointer */
     Assert(VARATT_IS_EXTERNAL_EXPANDED_RW(DatumGetPointer(d)));
  
     /* Kill it */
     MemoryContextDelete(eohptr->eoh_context);
 }

References Assert, DatumGetEOHP(), DatumGetPointer(), ExpandedObjectHeader::eoh_context, MemoryContextDelete(), and VARATT_IS_EXTERNAL_EXPANDED_RW.

Referenced by advance_windowaggregate(), advance_windowaggregate_base(), assign_record_var(), assign_simple_var(), exec_move_row(), and ExecAggCopyTransValue().

◆ EOH_flatten_into()

void EOH_flatten_into	(	ExpandedObjectHeader *	eohptr,
		void *	result,
		Size	allocated_size
	)

Definition at line 81 of file expandeddatum.c.

 {
     eohptr->eoh_methods->flatten_into(eohptr, result, allocated_size);
 }

References ExpandedObjectHeader::eoh_methods, and ExpandedObjectMethods::flatten_into.

Referenced by coerce_function_result_tuple(), datumCopy(), datumSerialize(), detoast_external_attr(), fill_val(), and tts_virtual_materialize().

◆ EOH_get_flat_size()

Size EOH_get_flat_size ( ExpandedObjectHeader * eohptr )

Definition at line 75 of file expandeddatum.c.

 {
     return eohptr->eoh_methods->get_flat_size(eohptr);
 }

References ExpandedObjectHeader::eoh_methods, and ExpandedObjectMethods::get_flat_size.

Referenced by coerce_function_result_tuple(), datumCopy(), datumEstimateSpace(), datumSerialize(), detoast_external_attr(), fill_val(), heap_compute_data_size(), toast_datum_size(), toast_raw_datum_size(), and tts_virtual_materialize().

◆ EOH_init_header()

void EOH_init_header	(	ExpandedObjectHeader *	eohptr,
		const ExpandedObjectMethods *	methods,
		MemoryContext	obj_context
	)

Definition at line 48 of file expandeddatum.c.

 {
     varatt_expanded ptr;
  
     eohptr->vl_len_ = EOH_HEADER_MAGIC;
     eohptr->eoh_methods = methods;
     eohptr->eoh_context = obj_context;
  
     ptr.eohptr = eohptr;
  
     SET_VARTAG_EXTERNAL(eohptr->eoh_rw_ptr, VARTAG_EXPANDED_RW);
     memcpy(VARDATA_EXTERNAL(eohptr->eoh_rw_ptr), &ptr, sizeof(ptr));
  
     SET_VARTAG_EXTERNAL(eohptr->eoh_ro_ptr, VARTAG_EXPANDED_RO);
     memcpy(VARDATA_EXTERNAL(eohptr->eoh_ro_ptr), &ptr, sizeof(ptr));
 }

References ExpandedObjectHeader::eoh_context, EOH_HEADER_MAGIC, ExpandedObjectHeader::eoh_methods, ExpandedObjectHeader::eoh_ro_ptr, ExpandedObjectHeader::eoh_rw_ptr, varatt_expanded::eohptr, SET_VARTAG_EXTERNAL, VARDATA_EXTERNAL, VARTAG_EXPANDED_RO, VARTAG_EXPANDED_RW, and ExpandedObjectHeader::vl_len_.

Referenced by build_dummy_expanded_header(), expand_array(), make_expanded_record_from_datum(), make_expanded_record_from_exprecord(), make_expanded_record_from_tupdesc(), and make_expanded_record_from_typeid().

◆ MakeExpandedObjectReadOnlyInternal()

Datum MakeExpandedObjectReadOnlyInternal ( Datum d )

Definition at line 95 of file expandeddatum.c.

 {
     ExpandedObjectHeader *eohptr;
  
     /* Nothing to do if not a read-write expanded-object pointer */
     if (!VARATT_IS_EXTERNAL_EXPANDED_RW(DatumGetPointer(d)))
         return d;
  
     /* Now safe to extract the object pointer */
     eohptr = DatumGetEOHP(d);
  
     /* Return the built-in read-only pointer instead of given pointer */
     return EOHPGetRODatum(eohptr);
 }

References DatumGetEOHP(), DatumGetPointer(), EOHPGetRODatum(), and VARATT_IS_EXTERNAL_EXPANDED_RW.

Referenced by ExecInterpExpr().

◆ TransferExpandedObject()

Datum TransferExpandedObject	(	Datum	d,
		MemoryContext	new_parent
	)

Definition at line 118 of file expandeddatum.c.

 {
     ExpandedObjectHeader *eohptr = DatumGetEOHP(d);
  
     /* Assert caller gave a R/W pointer */
     Assert(VARATT_IS_EXTERNAL_EXPANDED_RW(DatumGetPointer(d)));
  
     /* Transfer ownership */
     MemoryContextSetParent(eohptr->eoh_context, new_parent);
  
     /* Return the object's standard read-write pointer */
     return EOHPGetRWDatum(eohptr);
 }

References Assert, DatumGetEOHP(), DatumGetPointer(), ExpandedObjectHeader::eoh_context, EOHPGetRWDatum(), MemoryContextSetParent(), and VARATT_IS_EXTERNAL_EXPANDED_RW.

Referenced by datumTransfer(), and plpgsql_exec_function().

Functions