/*
* __open_index --
* Open an index.
*/
static int
__open_index(WT_SESSION_IMPL *session, WT_TABLE *table, WT_INDEX *idx)
{
WT_CONFIG colconf;
WT_CONFIG_ITEM ckey, cval, metadata;
WT_DECL_ITEM(buf);
WT_DECL_ITEM(plan);
WT_DECL_RET;
u_int npublic_cols, i;
WT_ERR(__wt_scr_alloc(session, 0, &buf));
/* Get the data source from the index config. */
WT_ERR(__wt_config_getones(session, idx->config, "source", &cval));
WT_ERR(__wt_strndup(session, cval.str, cval.len, &idx->source));
WT_ERR(__wt_config_getones(session, idx->config, "immutable", &cval));
if (cval.val)
F_SET(idx, WT_INDEX_IMMUTABLE);
/*
* Compatibility: we didn't always maintain collator information in
* index metadata, cope when it isn't found.
*/
WT_CLEAR(cval);
WT_ERR_NOTFOUND_OK(__wt_config_getones(
session, idx->config, "collator", &cval));
if (cval.len != 0) {
WT_CLEAR(metadata);
WT_ERR_NOTFOUND_OK(__wt_config_getones(
session, idx->config, "app_metadata", &metadata));
WT_ERR(__wt_collator_config(
session, idx->name, &cval, &metadata,
&idx->collator, &idx->collator_owned));
}
WT_ERR(__wt_extractor_config(
session, idx->name, idx->config, &idx->extractor,
&idx->extractor_owned));
WT_ERR(__wt_config_getones(session, idx->config, "key_format", &cval));
WT_ERR(__wt_strndup(session, cval.str, cval.len, &idx->key_format));
/*
* The key format for an index is somewhat subtle: the application
* specifies a set of columns that it will use for the key, but the
* engine usually adds some hidden columns in order to derive the
* primary key. These hidden columns are part of the file's key.
*
* The file's key_format is stored persistently, we need to calculate
* the index cursor key format (which will usually omit some of those
* keys).
*/
WT_ERR(__wt_buf_init(session, buf, 0));
WT_ERR(__wt_config_getones(
session, idx->config, "columns", &idx->colconf));
/* Start with the declared index columns. */
WT_ERR(__wt_config_subinit(session, &colconf, &idx->colconf));
for (npublic_cols = 0;
(ret = __wt_config_next(&colconf, &ckey, &cval)) == 0;
++npublic_cols)
WT_ERR(__wt_buf_catfmt(
session, buf, "%.*s,", (int)ckey.len, ckey.str));
if (ret != WT_NOTFOUND)
goto err;
/*
* If we didn't find any columns, the index must have an extractor.
* We don't rely on this unconditionally because it was only added to
* the metadata after version 2.3.1.
*/
if (npublic_cols == 0) {
WT_ERR(__wt_config_getones(
session, idx->config, "index_key_columns", &cval));
npublic_cols = (u_int)cval.val;
WT_ASSERT(session, npublic_cols != 0);
for (i = 0; i < npublic_cols; i++)
WT_ERR(__wt_buf_catfmt(session, buf, "\"bad col\","));
}
/*
* Now add any primary key columns from the table that are not
* already part of the index key.
*/
WT_ERR(__wt_config_subinit(session, &colconf, &table->colconf));
for (i = 0; i < table->nkey_columns &&
(ret = __wt_config_next(&colconf, &ckey, &cval)) == 0;
i++) {
/*
* If the primary key column is already in the secondary key,
* don't add it again.
*/
if (__wt_config_subgetraw(
session, &idx->colconf, &ckey, &cval) == 0)
continue;
WT_ERR(__wt_buf_catfmt(
session, buf, "%.*s,", (int)ckey.len, ckey.str));
}
WT_ERR_NOTFOUND_OK(ret);
/*
* If the table doesn't yet have its column groups, don't try to
* calculate a plan: we are just checking that the index creation is
* sane.
*/
if (!table->cg_complete)
goto err;
WT_ERR(__wt_scr_alloc(session, 0, &plan));
WT_ERR(__wt_struct_plan(
session, table, buf->data, buf->size, false, plan));
WT_ERR(__wt_strndup(session, plan->data, plan->size, &idx->key_plan));
/* Set up the cursor key format (the visible columns). */
WT_ERR(__wt_buf_init(session, buf, 0));
WT_ERR(__wt_struct_truncate(session,
idx->key_format, npublic_cols, buf));
WT_ERR(__wt_strndup(
session, buf->data, buf->size, &idx->idxkey_format));
/*
* Add a trailing padding byte to the format. This ensures that there
* will be no special optimization of the last column, so the primary
* key columns can be simply appended.
*/
WT_ERR(__wt_buf_catfmt(session, buf, "x"));
WT_ERR(__wt_strndup(session, buf->data, buf->size, &idx->exkey_format));
/* By default, index cursor values are the table value columns. */
/* TODO Optimize to use index columns in preference to table lookups. */
WT_ERR(__wt_buf_init(session, plan, 0));
WT_ERR(__wt_struct_plan(session,
table, table->colconf.str, table->colconf.len, true, plan));
WT_ERR(__wt_strndup(session, plan->data, plan->size, &idx->value_plan));
err: __wt_scr_free(session, &buf);
__wt_scr_free(session, &plan);
return (ret);
}
/*
* ___open_index --
* Open an index.
*/
static int
__open_index(WT_SESSION_IMPL *session, WT_TABLE *table, WT_INDEX *idx)
{
WT_CONFIG colconf;
WT_CONFIG_ITEM ckey, cval;
WT_DECL_ITEM(buf);
WT_DECL_ITEM(plan);
WT_DECL_RET;
u_int cursor_key_cols, i;
WT_ERR(__wt_scr_alloc(session, 0, &buf));
/* Get the data source from the index config. */
WT_ERR(__wt_config_getones(session, idx->config, "source", &cval));
WT_ERR(__wt_buf_fmt(
session, buf, "%.*s", (int)cval.len, cval.str));
idx->source = __wt_buf_steal(session, buf, NULL);
idx->need_value = WT_PREFIX_MATCH(idx->source, "lsm:");
WT_ERR(__wt_config_getones(session, idx->config, "key_format", &cval));
WT_ERR(__wt_buf_fmt(
session, buf, "%.*s", (int)cval.len, cval.str));
idx->key_format = __wt_buf_steal(session, buf, NULL);
/*
* The key format for an index is somewhat subtle: the application
* specifies a set of columns that it will use for the key, but the
* engine usually adds some hidden columns in order to derive the
* primary key. These hidden columns are part of the file's key.
*
* The file's key_format is stored persistently, we need to calculate
* the index cursor key format (which will usually omit some of those
* keys).
*/
WT_ERR(__wt_config_getones(
session, idx->config, "columns", &idx->colconf));
/* Start with the declared index columns. */
WT_ERR(__wt_config_subinit(session, &colconf, &idx->colconf));
cursor_key_cols = 0;
while ((ret = __wt_config_next(&colconf, &ckey, &cval)) == 0) {
WT_ERR(__wt_buf_catfmt(
session, buf, "%.*s,", (int)ckey.len, ckey.str));
++cursor_key_cols;
}
if (ret != 0 && ret != WT_NOTFOUND)
goto err;
/*
* Now add any primary key columns from the table that are not
* already part of the index key.
*/
WT_ERR(__wt_config_subinit(session, &colconf, &table->colconf));
for (i = 0; i < table->nkey_columns &&
(ret = __wt_config_next(&colconf, &ckey, &cval)) == 0;
i++) {
/*
* If the primary key column is already in the secondary key,
* don't add it again.
*/
if (__wt_config_subgetraw(
session, &idx->colconf, &ckey, &cval) == 0)
continue;
WT_ERR(__wt_buf_catfmt(
session, buf, "%.*s,", (int)ckey.len, ckey.str));
}
if (ret != 0 && ret != WT_NOTFOUND)
goto err;
WT_ERR(__wt_scr_alloc(session, 0, &plan));
WT_ERR(__wt_struct_plan(session, table, buf->data, buf->size, 0, plan));
idx->key_plan = __wt_buf_steal(session, plan, NULL);
/* Set up the cursor key format (the visible columns). */
WT_ERR(__wt_buf_init(session, buf, 0));
WT_ERR(__wt_struct_truncate(session,
idx->key_format, cursor_key_cols, buf));
idx->idxkey_format = __wt_buf_steal(session, buf, NULL);
/* By default, index cursor values are the table value columns. */
/* TODO Optimize to use index columns in preference to table lookups. */
WT_ERR(__wt_struct_plan(session,
table, table->colconf.str, table->colconf.len, 1, plan));
idx->value_plan = __wt_buf_steal(session, plan, NULL);
err: __wt_scr_free(&buf);
__wt_scr_free(&plan);
return (ret);
}
