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Support ALIASed columns in JOIN ON expression

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vdimir 2021-06-25 13:46:19 +03:00
parent 241b64d02c
commit 2949cd1e6f
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6 changed files with 19 additions and 13 deletions
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2
src/Interpreters/DatabaseAndTableWithAlias.h
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@ -61,7 +61,7 @@ struct TableWithColumnNamesAndTypes
names.insert(col.name);
}
bool hasColumn(const String & name) const { return names.count(name); }
bool hasColumn(const String & name) const { return names.contains(name); }
void addHiddenColumns(const NamesAndTypesList & addition)
{

3
src/Interpreters/ExpressionAnalyzer.cpp
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@ -806,7 +806,8 @@ JoinPtr SelectQueryExpressionAnalyzer::appendJoin(ExpressionActionsChain & chain
}
ExpressionActionsChain::Step & step = chain.lastStep(columns_after_array_join);
chain.steps.push_back(std::make_unique<ExpressionActionsChain::JoinStep>(syntax->analyzed_join, table_join, step.getResultColumns()));
chain.steps.push_back(std::make_unique<ExpressionActionsChain::JoinStep>(
syntax->analyzed_join, table_join, step.getResultColumns()));
chain.addStep();
return table_join;
}

1
src/Interpreters/InterpreterSelectQuery.cpp
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@ -30,7 +30,6 @@
#include <Interpreters/JoinToSubqueryTransformVisitor.h>
#include <Interpreters/CrossToInnerJoinVisitor.h>
#include <Interpreters/TableJoin.h>
#include <Interpreters/JoinSwitcher.h>
#include <Interpreters/JoinedTables.h>
#include <Interpreters/OpenTelemetrySpanLog.h>
#include <Interpreters/QueryAliasesVisitor.h>

19
src/Interpreters/TreeRewriter.cpp
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@ -508,14 +508,10 @@ void setJoinStrictness(ASTSelectQuery & select_query, JoinStrictness join_defaul
}
/// Find the columns that are obtained by JOIN.
void collectJoinedColumns(TableJoin & analyzed_join, const ASTSelectQuery & select_query,
void collectJoinedColumns(TableJoin & analyzed_join, const ASTTableJoin & table_join,
const TablesWithColumns & tables, const Aliases & aliases)
{
const ASTTablesInSelectQueryElement * node = select_query.join();
if (!node || tables.size() < 2)
return;
const auto & table_join = node->table_join->as<ASTTableJoin &>();
assert(tables.size() >= 2);
if (table_join.using_expression_list)
{
@ -936,7 +932,16 @@ TreeRewriterResultPtr TreeRewriter::analyzeSelect(
setJoinStrictness(
*select_query, settings.join_default_strictness, settings.any_join_distinct_right_table_keys, result.analyzed_join->table_join);
collectJoinedColumns(*result.analyzed_join, *select_query, tables_with_columns, result.aliases);
if (const auto * join_ast = select_query->join(); join_ast && tables_with_columns.size() >= 2)
{
auto & table_join_ast = join_ast->table_join->as<ASTTableJoin &>();
if (table_join_ast.using_expression_list && result.metadata_snapshot)
replaceAliasColumnsInQuery(table_join_ast.using_expression_list, result.metadata_snapshot->getColumns(), result.array_join_result_to_source, getContext());
if (table_join_ast.on_expression && result.metadata_snapshot)
replaceAliasColumnsInQuery(table_join_ast.on_expression, result.metadata_snapshot->getColumns(), result.array_join_result_to_source, getContext());
collectJoinedColumns(*result.analyzed_join, table_join_ast, tables_with_columns, result.aliases);
}
result.aggregates = getAggregates(query, *select_query);
result.window_function_asts = getWindowFunctions(query, *select_query);

2
tests/queries/0_stateless/01925_join_materialized_columns.reference
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@ -20,3 +20,5 @@
-
fact1t1_val1 fact1t2_val2
fact2t1_val2 fact2t1_val2
-
2020-02-02 13:00:00 2020-02-05 13:00:00

5
tests/queries/0_stateless/01925_join_materialized_columns.sql
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@ -33,6 +33,5 @@ SELECT '-';
SELECT * FROM t1 JOIN t2 ON t1.foo = t2.bar WHERE t2.aliascol2 == 'fact2t1_val2';
SELECT '-';
SELECT t1.aliascol1, t2.aliascol2 FROM t1 JOIN t2 ON t1.foo = t2.bar ORDER BY t1.time, t2.time;
-- SELECT '-';
-- SELECT * FROM t1 JOIN t2 ON t1.aliascol1 = t2.aliascol2 ORDER BY t1.time, t2.time;
SELECT '-';
SELECT t1.time, t2.time FROM t1 JOIN t2 ON t1.aliascol1 = t2.aliascol2 ORDER BY t1.time, t2.time;