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47 lines
1.5 KiB
C++
47 lines
1.5 KiB
C++
#pragma once
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#include <base/types.h>
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#include <functional>
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#include <optional>
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#include <vector>
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#include <Formats/FormatSchemaInfo.h>
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#include <Formats/FormatSettings.h>
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namespace DB
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{
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class Block;
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using Strings = std::vector<String>;
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struct ParsedTemplateFormatString
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{
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using EscapingRule = FormatSettings::EscapingRule;
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/// Format string has syntax: "Delimiter0 ${ColumnName0:Format0} Delimiter1 ${ColumnName1:Format1} Delimiter2"
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/// The following vectors is filled with corresponding values, delimiters.size() - 1 = formats.size() = format_idx_to_column_idx.size()
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/// If format_idx_to_column_idx[i] has no value, then TemplateRowInputFormat will skip i-th column.
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std::vector<String> delimiters;
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std::vector<EscapingRule> escaping_rules;
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std::vector<std::optional<size_t>> format_idx_to_column_idx;
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/// For diagnostic info
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Strings column_names;
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using ColumnIdxGetter = std::function<std::optional<size_t>(const String &)>;
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ParsedTemplateFormatString() = default;
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ParsedTemplateFormatString(const FormatSchemaInfo & schema, const ColumnIdxGetter & idx_by_name, bool allow_indexes = true);
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void parse(const String & format_string, const ColumnIdxGetter & idx_by_name, bool allow_indexes = true);
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static const char * readMayBeQuotedColumnNameInto(const char * pos, size_t size, String & s);
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size_t columnsCount() const;
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String dump() const;
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[[noreturn]] void throwInvalidFormat(const String & message, size_t column) const;
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};
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}
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