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Allow identifiers staring with numbers in multiple joins

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vdimir 2021-10-15 13:53:25 +03:00
parent d2b8d293b4
commit 042e61febf
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5 changed files with 52 additions and 2 deletions
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5
src/Interpreters/JoinToSubqueryTransformVisitor.cpp
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@ -18,7 +18,7 @@
#include <Parsers/parseQuery.h>
#include <IO/WriteHelpers.h>
#include <Core/Defines.h>
#include <Common/StringUtils/StringUtils.h>
namespace DB
{
@ -524,7 +524,8 @@ std::vector<TableNeededColumns> normalizeColumnNamesExtractNeeded(
size_t count = countTablesWithColumn(tables, short_name);
if (count > 1 || aliases.count(short_name))
/// isValidIdentifierBegin retuired to be consistent with TableJoin::deduplicateAndQualifyColumnNames
if (count > 1 || aliases.count(short_name) || !isValidIdentifierBegin(short_name.at(0)))
{
const auto & table = tables[*table_pos];
IdentifierSemantic::setColumnLongName(*ident, table.table); /// table.column -> table_alias.column

2
tests/queries/0_stateless/01120_join_constants.reference
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@ -1,2 +1,4 @@
1 hello 1 world world 1
2 hello 0 world 1
1 321 1 123 123 1
2 321 0 0 123 1

18
tests/queries/0_stateless/01120_join_constants.sql
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@ -15,3 +15,21 @@ LEFT JOIN
arrayJoin([1, 3]) AS k,
'world'
) AS t2 ON t1.k = t2.k;
SELECT
t1.*,
t2.*,
123,
isConstant('world')
FROM
(
SELECT
arrayJoin([1, 2]) AS k,
321
) AS t1
LEFT JOIN
(
SELECT
arrayJoin([1, 3]) AS k,
123
) AS t2 ON t1.k = t2.k;

2
tests/queries/0_stateless/02096_join_unusual_identifier_begin.reference Normal file
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@ -0,0 +1,2 @@
1 1 1 1 1 1
1

27
tests/queries/0_stateless/02096_join_unusual_identifier_begin.sql Normal file
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@ -0,0 +1,27 @@
DROP TABLE IF EXISTS t1;
DROP TABLE IF EXISTS t2;
DROP TABLE IF EXISTS t3;
CREATE TABLE t1 ( `a1` Int64, `1a1` Int64 ) ENGINE = Memory;
INSERT INTO t1 VALUES (1, 1);
CREATE TABLE t2 ( `b1` Int64, `1b1` Int64 ) ENGINE = Memory;
INSERT INTO t2 VALUES (1, 1);
CREATE TABLE t3 ( `c1` Int64, `1c1` Int64 ) ENGINE = Memory;
INSERT INTO t3 VALUES (1, 1);
SELECT
*
FROM t1 AS t1
INNER JOIN t2 AS t2 ON t1.a1 = t2.b1
INNER JOIN t3 AS t3 ON t1.a1 = t3.c1;
SELECT t2.`1b1` FROM t1 JOIN t2 ON a1 = b1;
-- Without quialification it doesn't work:
-- SELECT `1b1` FROM t1 JOIN t2 ON a1 = b1;
DROP TABLE IF EXISTS t1;
DROP TABLE IF EXISTS t2;
DROP TABLE IF EXISTS t3;