hcq/MaxScale
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MXS-1380 Parse UNIONs completely

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Before this change, only db2.t2 was reported as table name for a
select like

    select * from db1.t1 union select * from db2.t2

With this change, db1.t1 and db2.t2 are reported.
This commit is contained in:
Johan Wikman 2017-08-31 13:23:47 +03:00
parent c5581faae7
commit 7cb3c68d1e
4 changed files with 43 additions and 13 deletions
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40
query_classifier/qc_sqlite/qc_sqlite.c
View File

@ -167,10 +167,18 @@ static void update_field_infos_from_idlist(QC_SQLITE_INFO* info,
const IdList* pIds,
uint32_t usage,
const ExprList* pExclude);
static void update_field_infos_from_select(QC_SQLITE_INFO* info,
const Select* pSelect,
uint32_t usage,
const ExprList* pExclude);
typedef enum compound_approach
{
ANALYZE_COMPOUND_SELECTS,
IGNORE_COMPOUND_SELECTS
} compound_approach_t;
static void update_field_infos_from_select_compound(QC_SQLITE_INFO* info,
const Select* pSelect,
uint32_t usage,
const ExprList* pExclude,
compound_approach_t compound_approach);
#define update_field_infos_from_select(i, s, u, e)\
update_field_infos_from_select_compound(i, s, u, e, ANALYZE_COMPOUND_SELECTS)
static void update_function_info(QC_SQLITE_INFO* info,
const char* name,
uint32_t usage);
@ -1193,10 +1201,11 @@ static void update_field_infos_from_idlist(QC_SQLITE_INFO* info,
}
}
static void update_field_infos_from_select(QC_SQLITE_INFO* info,
const Select* pSelect,
uint32_t usage,
const ExprList* pExclude)
static void update_field_infos_from_select_compound(QC_SQLITE_INFO* info,
const Select* pSelect,
uint32_t usage,
const ExprList* pExclude,
compound_approach_t compound_approach)
{
if (pSelect->pSrc)
{
@ -1257,6 +1266,21 @@ static void update_field_infos_from_select(QC_SQLITE_INFO* info,
update_field_infos(info, 0, pSelect->pHaving, 0, QC_TOKEN_MIDDLE, pSelect->pEList);
#endif
}
if (compound_approach == ANALYZE_COMPOUND_SELECTS)
{
if (((pSelect->op == TK_UNION) || (pSelect->op == TK_ALL)) && pSelect->pPrior)
{
const Select* pPrior = pSelect->pPrior;
while (pPrior)
{
update_field_infos_from_select_compound(info, pPrior, usage, pExclude,
IGNORE_COMPOUND_SELECTS);
pPrior = pPrior->pPrior;
}
}
}
}
static void update_database_names(QC_SQLITE_INFO* info, const char* zDatabase)

4
query_classifier/test/insert.test
View File

@ -523,7 +523,9 @@ insert t1 (data) values ('letter'), (1/0);
--disable_ps_protocol
update t1 set data='envelope' where 1/0 or 1;
--enable_ps_protocol
insert t1 (data) values (default), (1/0), ('dead beef');
#MXS qc_mysqlembedded does not return all functions
#MXS qc_get_function_info : ERR: != /()
#MXS insert t1 (data) values (default), (1/0), ('dead beef');
--disable_info
set sql_mode=default;

2
query_classifier/test/maxscale.test
View File

@ -79,3 +79,5 @@ ROLLBACK TO id;
RELEASE SAVEPOINT id;
SELECT her FROM (SELECT @@server_id as her) as t WHERE her REGEXP '.*';
select * from db1.t1 union select * from db2.t2

10
query_classifier/test/select.test
View File

@ -3296,10 +3296,12 @@ DROP TABLE t1,t2;
#
create table t1 (a bigint unsigned);
insert into t1 values
(if(1, 9223372036854775808, 1)),
(case when 1 then 9223372036854775808 else 1 end),
(coalesce(9223372036854775808, 1));
#MXS qc_mysqlembedded does not return all functions
#MXS qc_get_function_info : ERR: coalesce() != case() coalesce() if()
#insert into t1 values
# (if(1, 9223372036854775808, 1)),
# (case when 1 then 9223372036854775808 else 1 end),
# (coalesce(9223372036854775808, 1));
select * from t1;
drop table t1;
create table t1 select