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fix push down

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This commit is contained in:
chertus 2019-02-08 18:37:43 +03:00
parent 6309377323
commit 668b220258
6 changed files with 35 additions and 6 deletions
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1
dbms/src/Interpreters/ExpressionAnalyzer.cpp
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@ -1049,6 +1049,7 @@ void ExpressionAnalyzer::collectUsedColumns()
if (!unknown_required_source_columns.empty())
{
std::stringstream ss;
ss << "query: '" << query << "'" << std::endl;
ss << columns_context;
ss << "source_columns: ";
for (const auto & name : source_columns)

4
dbms/src/Interpreters/FindIdentifierBestTableVisitor.h
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@ -10,8 +10,10 @@ namespace DB
struct FindIdentifierBestTableData
{
using TypeToVisit = ASTIdentifier;
using IdentifierWithTable = std::pair<ASTIdentifier *, const DatabaseAndTableWithAlias *>;
const std::vector<DatabaseAndTableWithAlias> & tables;
std::vector<std::pair<ASTIdentifier *, const DatabaseAndTableWithAlias *>> identifier_table;
std::vector<IdentifierWithTable> identifier_table;
FindIdentifierBestTableData(const std::vector<DatabaseAndTableWithAlias> & tables_);

15
dbms/src/Interpreters/IdentifierSemantic.cpp
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@ -112,8 +112,21 @@ void IdentifierSemantic::setColumnNormalName(ASTIdentifier & identifier, const D
if (identifier.semantic->need_long_name)
{
String prefix = db_and_table.getQualifiedNamePrefix();
identifier.name.insert(identifier.name.begin(), prefix.begin(), prefix.end());
if (!prefix.empty())
{
String short_name = identifier.shortName();
identifier.name = prefix + short_name;
prefix.resize(prefix.size() - 1); /// crop dot
identifier.name_parts = {prefix, short_name};
}
}
}
String IdentifierSemantic::columnNormalName(const ASTIdentifier & identifier, const DatabaseAndTableWithAlias & db_and_table)
{
ASTPtr copy = identifier.clone();
setColumnNormalName(typeid_cast<ASTIdentifier &>(*copy), db_and_table);
return copy->getAliasOrColumnName();
}
}

1
dbms/src/Interpreters/IdentifierSemantic.h
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@ -25,6 +25,7 @@ struct IdentifierSemantic
static std::pair<String, String> extractDatabaseAndTable(const ASTIdentifier & identifier);
static size_t canReferColumnToTable(const ASTIdentifier & identifier, const DatabaseAndTableWithAlias & db_and_table);
static String columnNormalName(const ASTIdentifier & identifier, const DatabaseAndTableWithAlias & db_and_table);
static void setColumnNormalName(ASTIdentifier & identifier, const DatabaseAndTableWithAlias & db_and_table);
static void setNeedLongName(ASTIdentifier & identifier, bool); /// if set setColumnNormalName makes qualified name

18
dbms/src/Interpreters/PredicateExpressionsOptimizer.cpp
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@ -236,10 +236,22 @@ void PredicateExpressionsOptimizer::setNewAliasesForInnerPredicate(
{
if (alias == qualified_name)
{
if (!isIdentifier(ast) && ast->tryGetAlias().empty())
ast->setAlias(ast->getColumnName());
String name;
if (auto * id = typeid_cast<const ASTIdentifier *>(ast.get()))
{
name = id->tryGetAlias();
if (name.empty())
name = id->shortName();
}
else
{
if (ast->tryGetAlias().empty())
ast->setAlias(ast->getColumnName());
name = ast->getAliasOrColumnName();
}
identifier->resetWithAlias(ast->getAliasOrColumnName());
IdentifierSemantic::setNeedLongName(*identifier, false);
identifier->setShortName(name);
}
}
}

2
dbms/src/Parsers/ASTIdentifier.h
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@ -36,7 +36,7 @@ public:
bool compound() const { return !name_parts.empty(); }
bool isShort() const { return name_parts.empty() || name == name_parts.back(); }
void resetWithAlias(const String & new_name)
void setShortName(const String & new_name)
{
name = new_name;
name_parts.clear();