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87 lines
3.5 KiB
C++
87 lines
3.5 KiB
C++
#include <Storages/IStorage.h>
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#include <Parsers/ASTOptimizeQuery.h>
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#include <Interpreters/Context.h>
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#include <Interpreters/executeDDLQueryOnCluster.h>
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#include <Interpreters/InterpreterOptimizeQuery.h>
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#include <Access/Common/AccessRightsElement.h>
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#include <Common/typeid_cast.h>
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#include <Parsers/ASTExpressionList.h>
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#include <Interpreters/processColumnTransformers.h>
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#include <memory>
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namespace DB
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{
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namespace ErrorCodes
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{
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extern const int THERE_IS_NO_COLUMN;
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}
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BlockIO InterpreterOptimizeQuery::execute()
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{
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const auto & ast = query_ptr->as<ASTOptimizeQuery &>();
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if (!ast.cluster.empty())
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return executeDDLQueryOnCluster(query_ptr, getContext(), getRequiredAccess());
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getContext()->checkAccess(getRequiredAccess());
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auto table_id = getContext()->resolveStorageID(ast, Context::ResolveOrdinary);
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StoragePtr table = DatabaseCatalog::instance().getTable(table_id, getContext());
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auto metadata_snapshot = table->getInMemoryMetadataPtr();
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// Empty list of names means we deduplicate by all columns, but user can explicitly state which columns to use.
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Names column_names;
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if (ast.deduplicate_by_columns)
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{
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// User requested custom set of columns for deduplication, possibly with Column Transformer expression.
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{
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// Expand asterisk, column transformers, etc into list of column names.
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const auto cols
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= processColumnTransformers(getContext()->getCurrentDatabase(), table, metadata_snapshot, ast.deduplicate_by_columns);
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for (const auto & col : cols->children)
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column_names.emplace_back(col->getColumnName());
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}
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metadata_snapshot->check(column_names, NamesAndTypesList{}, table_id);
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Names required_columns;
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{
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required_columns = metadata_snapshot->getColumnsRequiredForSortingKey();
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const auto partitioning_cols = metadata_snapshot->getColumnsRequiredForPartitionKey();
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required_columns.reserve(required_columns.size() + partitioning_cols.size());
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required_columns.insert(required_columns.end(), partitioning_cols.begin(), partitioning_cols.end());
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}
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for (const auto & required_col : required_columns)
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{
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// Deduplication is performed only for adjacent rows in a block,
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// and all rows in block are in the sorting key order within a single partition,
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// hence deduplication always implicitly takes sorting keys and partition keys in account.
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// So we just explicitly state that limitation in order to avoid confusion.
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if (std::find(column_names.begin(), column_names.end(), required_col) == column_names.end())
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throw Exception(ErrorCodes::THERE_IS_NO_COLUMN,
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"DEDUPLICATE BY expression must include all columns used in table's"
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" ORDER BY, PRIMARY KEY, or PARTITION BY but '{}' is missing."
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" Expanded DEDUPLICATE BY columns expression: ['{}']",
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required_col, fmt::join(column_names, "', '"));
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}
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}
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table->optimize(query_ptr, metadata_snapshot, ast.partition, ast.final, ast.deduplicate, column_names, getContext());
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return {};
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}
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AccessRightsElements InterpreterOptimizeQuery::getRequiredAccess() const
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{
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const auto & optimize = query_ptr->as<const ASTOptimizeQuery &>();
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AccessRightsElements required_access;
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required_access.emplace_back(AccessType::OPTIMIZE, optimize.database, optimize.table);
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return required_access;
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}
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}
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