120 lines
5.2 KiB
SQL
120 lines
5.2 KiB
SQL
################################## Index Hint ##################################
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#测试主键index和普通index的情况
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select /*+FULL(t4)*/* from t4;
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select /*+INDEX(t4 idx_t4_c2_c3)*/* from t4;
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select /*+INDEX(t4 idx_t4_c2)*/* from t4;
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select /*+INDEX(t4 idx_t4_c3)*/* from t4;
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select /*+INDEX(t_pt t_pt_idx_1)*/* from t_pt where (c2,c1) > (300,200);
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select /*+INDEX(t_pt primary)*/* from t_pt where (c2,c1) > (300,200);
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select /*+INDEX(t_pt primary)*/* from t_pt where (c1,c2) > (200,300);
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#测试无效index的情况
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select /*+INDEX(t4 idx_t4_invalid)*/* from t4;
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#测试同一个table 对应多个可选index
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select /*+INDEX(t4 idx_t4_c3) INDEX(t4 idx_t4_c2) INDEX(t4 idx_t4_c2_c3) */* from t4;
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select * from t4 use index(idx_t4_c3, idx_t4_c2, idx_t4_c2_c3);
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select * from t4 force index(idx_t4_c3, idx_t4_c2, idx_t4_c2_c3);
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select /*+INDEX(t4 idx_t4_c3) FULL(t4) */* from t4;
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#测试指定多个table index的情况
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select /*+INDEX(t4 idx_t4_c3) INDEX(t5 idx_t5_c2)*/* from t4,t5;
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#测试alias的情况
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select /*+INDEX(t4 idx_t4_c3)*/* from t4 as tt;
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select /*+INDEX(tt idx_t4_c3)*/* from t4 as tt;
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#测试index list为空的情况
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select * from t4 use index();
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#测试use_index与ignore_index混用的情况
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select /*+INDEX(t4 idx_t4_c3) */* from t4 ignore index(idx_t4_c3);
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##### 测试ingore的情况#####
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select * from t4 ignore index(idx_t4_c3);
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select * from t4 ignore index(idx_t4_c2);
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# 同时制定多个ingore, 当同时编写多个ingore时，只有第一个生效
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select * from t4 ignore index(idx_t4_c3, idx_t4_c2);
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select * from t4 ignore index(idx_t4_c3) ignore index(idx_t4_c2);
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# alias
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select * from t4 tt ignore index(idx_t4_c3, idx_t4_c2);
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select * from t4 tt ignore index(idx_t4_c3) ignore index(idx_t4_c2);
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# primary
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select * from t4 tt ignore index(primary, idx_t4_c2);
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select * from t4 tt ignore index(primary) ignore index(idx_t4_c3);
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select * from t4 tt ignore index(primary) ignore index(idx_t4_c2_);
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################################## Join Type Hint ##################################
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# normal
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select * from t4,t5;
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select /*+leading(t4 t5) use_nl(t5)*/* from t4,t5;
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# alias
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select /*+leading(tt4 tt5) use_nl(tt5)*/* from t4 tt4, t5 tt5;
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# multi hint
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select /*+leading (t4 t5) use_nl(t5) use_nl(t5) use_nl(t5)*/* from t4,t5;
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select /*+use_nl(t4) use_nl(t5)*/* from t4,t5;
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# outer join
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select /*+leading (t4 t5) use_nl(t5)*/* from t4 left join t5 on t4.c1 = t5.c1;
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select /*+leading (t5 t4) use_nl(t5)*/* from t4 left join t5 on t4.c1 = t5.c1;
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select /*+leading (t4 t5) use_nl(t5)*/* from t4 right join t5 on t4.c1 = t5.c1;
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select /*+leading (t5 t4) use_nl(t5)*/* from t4 right join t5 on t4.c1 = t5.c1;
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select /*+leading (t4 t5) use_nl(t5)*/* from t4 full join t5 on t4.c1 = t5.c1;
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select /*+leading (t5 t4) use_nl(t5)*/* from t4 full join t5 on t4.c1 = t5.c1;
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select /*+leading (t4 t5) use_merge(t5)*/* from t4 left join t5 on t4.c1 = t5.c1;
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select /*+leading (t4 t5) use_merge(t5)*/* from t4 right join t5 on t4.c1 = t5.c1;
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select /*+leading (t4 t5) use_merge(t5)*/* from t4 full join t5 on t4.c1 = t5.c1;
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# subplan_scan
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select /*+leading(tt t5) use_nl(t5)*/* from (select max(c1) from t1) tt, t5;
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select /*+leading(t5 tt) use_nl(tt)*/* from (select max(c1) from t1) tt, t5;
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# test for different join type
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select /*+leading(t4 t5) use_bnl(t5)*/* from t4,t5;
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select /*+leading(t4 t5) use_bnl(t5)*/* from t4,t5;
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# multi join tree
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select /*+leading(tt t5) use_nl(t5)*/* from (select /*+leading(t4 t7) use_nl(t7)*/max(t4.c1) from t4,t7) tt, t5;
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select /*+leading(t5 tt) use_nl(tt)*/* from (select /*+leading(t7 t4) use_nl(t4)*/max(t4.c1) from t4,t7) tt, t5;
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# test for leading
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select /*+ordered*/* from t4,t5;
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select /*+ordered*/* from t5,t4;
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select /*+ordered*/* from t5;
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select /*+ordered*/* from t4 left join t5 on t4.c1=t5.c1;
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select /*+ordered*/* from t4 right join t5 on t4.c1=t5.c1;
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select /*+ordered*/* from t4 full join t5 on t4.c1=t5.c1;
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################################## test for late materialization ##################################
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select /*+index(t_normal_idx idx)*/* from t_normal_idx order by c3 limit 1;
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select /*+use_late_materialization index(t_normal_idx idx)*/* from t_normal_idx order by c3 limit 1;
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select /*+no_use_late_materialization index(t_normal_idx idx)*/* from t_normal_idx where c2=1 order by c4 limit 1;
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################################## test for qb_name ##################################
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select * from t4;
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select /*+qb_name(select_1)*/* from t4;
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select /*+qb_name(select_1) qb_name(select_2)*/* from t4;
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select /*+qb_name(select_1) */* from t4 where t4.c1 > any(select /*+qb_name(select_2)*/c1 from t5);
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select /*+qb_name(select_1) */* from t4 where t4.c1 > any(select /*+qb_name(select_1)*/c1 from t5);
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################################## 测试不应该显示的hint ##################################
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select /*+topk(1 100) hotspot max_concurrent(1)*/* from t4;
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################################## 测试指定即生效的hint #################################
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select /*+read_consistency("weak")*/* from t1;
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select /*+query_timeout(100)*/ * from t1;
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select /*+frozen_version(1)*/ * from t1;
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select /*+use_plan_cache(none)*/ * from t1;
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select /*+use_plan_cache(default)*/ * from t1;
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select /*+use_plan_cache(nothing)*/ * from t1;
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select /*+no_rewrite*/ * from t1;
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select /*+trace_log*/ * from t1;
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select /*+log_level('INFO')*/ * from t1;
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