diff options
Diffstat (limited to 'src/backend/access/heap/tuptoaster.c')
| -rw-r--r-- | src/backend/access/heap/tuptoaster.c | 76 |
1 files changed, 33 insertions, 43 deletions
diff --git a/src/backend/access/heap/tuptoaster.c b/src/backend/access/heap/tuptoaster.c index 77caf79dd19..5359f24fce2 100644 --- a/src/backend/access/heap/tuptoaster.c +++ b/src/backend/access/heap/tuptoaster.c @@ -8,7 +8,7 @@ * * * IDENTIFICATION - * $PostgreSQL: pgsql/src/backend/access/heap/tuptoaster.c,v 1.50 2005/07/06 19:02:52 momjian Exp $ + * $PostgreSQL: pgsql/src/backend/access/heap/tuptoaster.c,v 1.51 2005/08/02 16:11:57 tgl Exp $ * * * INTERFACE ROUTINES @@ -268,6 +268,38 @@ toast_raw_datum_size(Datum value) return result; } +/* ---------- + * toast_datum_size + * + * Return the physical storage size (possibly compressed) of a varlena datum + * ---------- + */ +Size +toast_datum_size(Datum value) +{ + varattrib *attr = (varattrib *) DatumGetPointer(value); + Size result; + + if (VARATT_IS_EXTERNAL(attr)) + { + /* + * Attribute is stored externally - return the extsize whether + * compressed or not. We do not count the size of the toast + * pointer ... should we? + */ + result = attr->va_content.va_external.va_extsize; + } + else + { + /* + * Attribute is stored inline either compressed or not, just + * calculate the size of the datum in either case. + */ + result = VARSIZE(attr); + } + return result; +} + /* ---------- * toast_delete - @@ -1436,45 +1468,3 @@ toast_fetch_datum_slice(varattrib *attr, int32 sliceoffset, int32 length) return result; } - -/* ---------- - * toast_datum_size - * - * Show the (possibly compressed) size of a datum - * ---------- - */ -Size -toast_datum_size(Datum value) -{ - - varattrib *attr = (varattrib *) DatumGetPointer(value); - Size result; - - if (VARATT_IS_EXTERNAL(attr)) - { - /* - * Attribute is stored externally - If it is compressed too, - * then we need to get the external datum and calculate its size, - * otherwise we just use the external rawsize. - */ - if (VARATT_IS_COMPRESSED(attr)) - { - varattrib *attrext = toast_fetch_datum(attr); - result = VARSIZE(attrext); - pfree(attrext); - } - else - result = attr->va_content.va_external.va_rawsize; - } - else - { - /* - * Attribute is stored inline either compressed or not, just - * calculate the size of the datum in either case. - */ - result = VARSIZE(attr); - } - - return result; - -} |