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50 lines
1.8 KiB
C++
50 lines
1.8 KiB
C++
#include <Interpreters/processColumnTransformers.h>
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#include <Interpreters/DatabaseAndTableWithAlias.h>
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#include <Interpreters/TranslateQualifiedNamesVisitor.h>
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#include <Interpreters/getTableExpressions.h>
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#include <Parsers/ASTIdentifier.h>
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#include <Parsers/ASTTablesInSelectQuery.h>
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#include <Parsers/IAST.h>
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#include <Storages/IStorage.h>
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#include <Storages/StorageInMemoryMetadata.h>
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namespace DB
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{
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ASTPtr processColumnTransformers(
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const String & current_database,
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const StoragePtr & table,
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const StorageMetadataPtr & metadata_snapshot,
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ASTPtr query_columns)
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{
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const auto & columns = metadata_snapshot->getColumns();
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auto names_and_types = columns.getOrdinary();
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removeDuplicateColumns(names_and_types);
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TablesWithColumns tables_with_columns;
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{
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auto table_expr = std::make_shared<ASTTableExpression>();
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table_expr->database_and_table_name = std::make_shared<ASTTableIdentifier>(table->getStorageID());
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table_expr->children.push_back(table_expr->database_and_table_name);
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tables_with_columns.emplace_back(DatabaseAndTableWithAlias(*table_expr, current_database), names_and_types);
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}
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tables_with_columns[0].addHiddenColumns(columns.getMaterialized());
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tables_with_columns[0].addHiddenColumns(columns.getAliases());
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tables_with_columns[0].addHiddenColumns(table->getVirtuals());
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NameSet source_columns_set;
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for (const auto & identifier : query_columns->children)
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source_columns_set.insert(identifier->getColumnName());
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TranslateQualifiedNamesVisitor::Data visitor_data(source_columns_set, tables_with_columns);
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TranslateQualifiedNamesVisitor visitor(visitor_data);
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auto columns_ast = query_columns->clone();
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visitor.visit(columns_ast);
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return columns_ast;
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}
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}
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