/*
* __wt_table_check --
* Make sure all columns appear in a column group.
*/
int
__wt_table_check(WT_SESSION_IMPL *session, WT_TABLE *table)
{
WT_CONFIG conf;
WT_CONFIG_ITEM k, v;
WT_DECL_RET;
u_int cg, col, i;
char coltype;
if (table->is_simple)
return (0);
/* Walk through the columns. */
__wt_config_subinit(session, &conf, &table->colconf);
/* Skip over the key columns. */
for (i = 0; i < table->nkey_columns; i++)
WT_RET(__wt_config_next(&conf, &k, &v));
cg = col = 0;
coltype = 0;
while ((ret = __wt_config_next(&conf, &k, &v)) == 0) {
if (__find_next_col(
session, table, &k, &cg, &col, &coltype) != 0)
WT_RET_MSG(session, EINVAL,
"Column '%.*s' in '%s' does not appear in a "
"column group",
(int)k.len, k.str, table->iface.name);
/*
* Column groups can't store key columns in their value:
* __wt_struct_reformat should have already detected this case.
*/
WT_ASSERT(session, coltype == WT_PROJ_VALUE);
}
WT_RET_TEST(ret != WT_NOTFOUND, ret);
return (0);
}
/*
* __wt_struct_plan --
* Given a table cursor containing a complete table, build the "projection
* plan" to distribute the columns to dependent stores. A string
* representing the plan will be appended to the plan buffer.
*/
int
__wt_struct_plan(WT_SESSION_IMPL *session, WT_TABLE *table,
const char *columns, size_t len, bool value_only, WT_ITEM *plan)
{
WT_CONFIG conf;
WT_CONFIG_ITEM k, v;
WT_DECL_RET;
u_int cg, col, current_cg, current_col, i, start_cg, start_col;
char coltype, current_coltype;
bool have_it;
start_cg = start_col = UINT_MAX; /* -Wuninitialized */
/* Work through the value columns by skipping over the key columns. */
__wt_config_initn(session, &conf, columns, len);
if (value_only)
for (i = 0; i < table->nkey_columns; i++)
WT_RET(__wt_config_next(&conf, &k, &v));
current_cg = cg = 0;
current_col = col = INT_MAX;
current_coltype = coltype = WT_PROJ_KEY; /* Keep lint quiet. */
for (i = 0; (ret = __wt_config_next(&conf, &k, &v)) == 0; i++) {
have_it = false;
while ((ret = __find_next_col(session, table,
&k, &cg, &col, &coltype)) == 0 &&
(!have_it || cg != start_cg || col != start_col)) {
/*
* First we move to the column. If that is in a
* different column group to the last column we
* accessed, or before the last column in the same
* column group, or moving from the key to the value,
* we need to switch column groups or rewind.
*/
if (current_cg != cg || current_col > col ||
current_coltype != coltype) {
WT_ASSERT(session, !value_only ||
coltype == WT_PROJ_VALUE);
WT_RET(__wt_buf_catfmt(
session, plan, "%u%c", cg, coltype));
/*
* Set the current column group and column
* within the table.
*/
current_cg = cg;
current_col = 0;
current_coltype = coltype;
}
/* Now move to the column we want. */
if (current_col < col) {
if (col - current_col > 1)
WT_RET(__wt_buf_catfmt(session,
plan, "%u", col - current_col));
WT_RET(__wt_buf_catfmt(session,
plan, "%c", WT_PROJ_SKIP));
}
/*
* Now copy the value in / out. In the common case,
* where each value is used in one column, we do a
* "next" operation. If the value is used again, we do
* a "reuse" operation to avoid making another copy.
*/
if (!have_it) {
WT_RET(__wt_buf_catfmt(session,
plan, "%c", WT_PROJ_NEXT));
start_cg = cg;
start_col = col;
have_it = true;
} else
WT_RET(__wt_buf_catfmt(session,
plan, "%c", WT_PROJ_REUSE));
current_col = col + 1;
}
/*
* We may fail to find a column if it is a custom extractor.
* In that case, treat it as the first value column: we only
* ever use such plans to extract the primary key from the
* index.
*/
if (ret == WT_NOTFOUND)
WT_RET(__wt_buf_catfmt(session, plan,
"0%c%c", WT_PROJ_VALUE, WT_PROJ_NEXT));
}
WT_RET_TEST(ret != WT_NOTFOUND, ret);
/* Special case empty plans. */
if (i == 0 && plan->size == 0)
WT_RET(__wt_buf_set(session, plan, "", 1));
return (0);
}
/*
* __wt_struct_plan --
* Given a table cursor containing a complete table, build the "projection
* plan" to distribute the columns to dependent stores. A string
* representing the plan will be appended to the plan buffer.
*/
int
__wt_struct_plan(WT_SESSION_IMPL *session, WT_TABLE *table,
const char *columns, size_t len, int value_only, WT_ITEM *plan)
{
WT_BTREE *saved_btree;
WT_CONFIG conf;
WT_CONFIG_ITEM k, v;
WT_DECL_RET;
int cg, col, current_cg, current_col, start_cg, start_col;
int i, have_it;
char coltype, current_coltype;
saved_btree = session->btree;
start_cg = start_col = -1; /* -Wuninitialized */
/* Work through the value columns by skipping over the key columns. */
WT_ERR(__wt_config_initn(session, &conf, columns, len));
if (value_only)
for (i = 0; i < table->nkey_columns; i++)
WT_ERR(__wt_config_next(&conf, &k, &v));
current_cg = cg = 0;
current_col = col = INT_MAX;
current_coltype = coltype = WT_PROJ_KEY; /* Keep lint quiet. */
while (__wt_config_next(&conf, &k, &v) == 0) {
have_it = 0;
while (__find_next_col(session, table,
&k, &cg, &col, &coltype) == 0 &&
(!have_it || cg != start_cg || col != start_col)) {
/*
* First we move to the column. If that is in a
* different column group to the last column we
* accessed, or before the last column in the same
* column group, or moving from the key to the value,
* we need to switch column groups or rewind.
*/
if (current_cg != cg || current_col > col ||
current_coltype != coltype) {
WT_ASSERT(session, !value_only ||
coltype == WT_PROJ_VALUE);
WT_ERR(__wt_buf_catfmt(
session, plan, "%d%c", cg, coltype));
/*
* Set the current column group and column
* within the table.
*/
current_cg = cg;
current_col = 0;
current_coltype = coltype;
}
/* Now move to the column we want. */
if (current_col < col) {
if (col - current_col > 1)
WT_ERR(__wt_buf_catfmt(session,
plan, "%d", col - current_col));
WT_ERR(__wt_buf_catfmt(session,
plan, "%c", WT_PROJ_SKIP));
}
/*
* Now copy the value in / out. In the common case,
* where each value is used in one column, we do a
* "next" operation. If the value is used again, we do
* a "reuse" operation to avoid making another copy.
*/
if (!have_it) {
WT_ERR(__wt_buf_catfmt(session,
plan, "%c", WT_PROJ_NEXT));
start_cg = cg;
start_col = col;
have_it = 1;
} else
WT_ERR(__wt_buf_catfmt(session,
plan, "%c", WT_PROJ_REUSE));
current_col = col + 1;
}
}
err: session->btree = saved_btree;
return (ret);
}
