branches/zip: row_ext_lookup_ith(): New function, sliced from

row_ext_lookup().
This commit is contained in:
marko 2007-09-19 07:11:13 +00:00
parent 685f665b06
commit 06b6f54447
2 changed files with 46 additions and 9 deletions

View file

@ -29,6 +29,20 @@ row_ext_create(
Looks up a column prefix of an externally stored column. */
UNIV_INLINE
byte*
row_ext_lookup_ith(
/*===============*/
/* out: column prefix, or NULL if
the column is not stored externally */
row_ext_t* ext, /* in/out: column prefix cache */
ulint i, /* in: ith element of ext */
const byte* field, /* in: locally stored part of the column */
ulint f_len, /* in: length of field, in bytes */
ulint* len); /* out: length of prefix, in bytes,
at most REC_MAX_INDEX_COL_LEN */
/************************************************************************
Looks up a column prefix of an externally stored column. */
UNIV_INLINE
byte*
row_ext_lookup(
/*===========*/
/* out: column prefix, or NULL if

View file

@ -50,6 +50,37 @@ row_ext_create(
return(ret);
}
/************************************************************************
Looks up a column prefix of an externally stored column. */
UNIV_INLINE
byte*
row_ext_lookup_ith(
/*===============*/
/* out: column prefix, or NULL if
the column is not stored externally */
row_ext_t* ext, /* in/out: column prefix cache */
ulint i, /* in: index of ext->ext[] */
const byte* field, /* in: locally stored part of the column */
ulint f_len, /* in: length of field, in bytes */
ulint* len) /* out: length of prefix, in bytes,
at most REC_MAX_INDEX_COL_LEN */
{
ut_ad(ext);
ut_ad(field);
ut_ad(len);
ut_ad(i < ext->n_ext);
/* Return from the cache if found */
if (ext->len[i]) {
*len = ext->len[i];
ut_ad(*len > f_len);
return(ext->buf + i * REC_MAX_INDEX_COL_LEN);
}
/* Update the cache */
return(row_ext_lookup_low(ext, i, field, f_len, len));
}
/************************************************************************
Looks up a column prefix of an externally stored column. */
UNIV_INLINE
@ -73,15 +104,7 @@ row_ext_lookup(
for (i = 0; i < ext->n_ext; i++) {
if (col == ext->ext[i]) {
/* Return from the cache if found */
if (ext->len[i]) {
*len = ext->len[i];
ut_ad(*len > f_len);
return(ext->buf + i * REC_MAX_INDEX_COL_LEN);
}
/* Update the cache */
return(row_ext_lookup_low(ext, i, field, f_len, len));
return(row_ext_lookup_ith(ext, i, field, f_len, len));
}
}