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Code Issues

Let's choose a reasonable join order for intermixed inner and outer joins.

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This commit is contained in:
dimitr 2004-09-02 14:53:43 +00:00
parent 2e5ad2a0fb
commit 62c11614fc
1 changed files with 4 additions and 4 deletions
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8
src/jrd/opt.cpp
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@ -2653,13 +2653,13 @@ static bool estimate_cost(thread_db* tdbb,
// Compute index selectivity. This involves finding the indices
// to be utilized and making a crude guess of selectivities.
if (opt->opt_base_conjuncts) {
if (opt->opt_conjuncts.getCount()) {
index_desc* idx = csb_tail->csb_idx->items;
for (USHORT i = 0; i < csb_tail->csb_indices; i++) {
SSHORT n = 0;
clear_bounds(opt, idx);
const OptimizerBlk::opt_conjunct* const opt_end =
opt->opt_conjuncts.begin() + opt->opt_base_conjuncts;
opt->opt_conjuncts.end();
for (const OptimizerBlk::opt_conjunct* tail = opt->opt_conjuncts.begin();
tail < opt_end; tail++)
{
@ -2716,7 +2716,7 @@ static bool estimate_cost(thread_db* tdbb,
or not they were the result of index operations. */
const OptimizerBlk::opt_conjunct* const opt_end =
opt->opt_conjuncts.begin() + opt->opt_base_conjuncts;
opt->opt_conjuncts.end();
for (OptimizerBlk::opt_conjunct* tail = opt->opt_conjuncts.begin();
tail < opt_end; tail++)
@ -3503,7 +3503,7 @@ static void find_best(thread_db* tdbb,
Firebird::HalfStaticArray<UCHAR, OPT_STATIC_ITEMS>
stream_flags(*tdbb->getDefaultPool()), conjunct_flags(*tdbb->getDefaultPool());
stream_flags.grow(csb->csb_n_stream);
conjunct_flags.grow(opt->opt_base_conjuncts);
conjunct_flags.grow(opt->opt_conjuncts.getCount());
size_t i;
for (i = 0; i < stream_flags.getCount(); i++)
stream_flags[i] = opt->opt_streams[i].opt_stream_flags & opt_stream_used;