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Merge pull request #66782 from a-a-f/input_format_json_empty_as_default
Add support for the `input_format_json_empty_as_default` setting
This commit is contained in:
commit
2fce90ab76
@ -1396,6 +1396,7 @@ SELECT * FROM json_each_row_nested
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- [input_format_json_ignore_unknown_keys_in_named_tuple](/docs/en/operations/settings/settings-formats.md/#input_format_json_ignore_unknown_keys_in_named_tuple) - ignore unknown keys in json object for named tuples. Default value - `false`.
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- [input_format_json_ignore_unknown_keys_in_named_tuple](/docs/en/operations/settings/settings-formats.md/#input_format_json_ignore_unknown_keys_in_named_tuple) - ignore unknown keys in json object for named tuples. Default value - `false`.
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- [input_format_json_compact_allow_variable_number_of_columns](/docs/en/operations/settings/settings-formats.md/#input_format_json_compact_allow_variable_number_of_columns) - allow variable number of columns in JSONCompact/JSONCompactEachRow format, ignore extra columns and use default values on missing columns. Default value - `false`.
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- [input_format_json_compact_allow_variable_number_of_columns](/docs/en/operations/settings/settings-formats.md/#input_format_json_compact_allow_variable_number_of_columns) - allow variable number of columns in JSONCompact/JSONCompactEachRow format, ignore extra columns and use default values on missing columns. Default value - `false`.
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- [input_format_json_throw_on_bad_escape_sequence](/docs/en/operations/settings/settings-formats.md/#input_format_json_throw_on_bad_escape_sequence) - throw an exception if JSON string contains bad escape sequence. If disabled, bad escape sequences will remain as is in the data. Default value - `true`.
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- [input_format_json_throw_on_bad_escape_sequence](/docs/en/operations/settings/settings-formats.md/#input_format_json_throw_on_bad_escape_sequence) - throw an exception if JSON string contains bad escape sequence. If disabled, bad escape sequences will remain as is in the data. Default value - `true`.
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- [input_format_json_empty_as_default](/docs/en/operations/settings/settings-formats.md/#input_format_json_empty_as_default) - treat empty fields in JSON input as default values. Default value - `false`. For complex default expressions [input_format_defaults_for_omitted_fields](/docs/en/operations/settings/settings-formats.md/#input_format_defaults_for_omitted_fields) must be enabled too.
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- [output_format_json_quote_64bit_integers](/docs/en/operations/settings/settings-formats.md/#output_format_json_quote_64bit_integers) - controls quoting of 64-bit integers in JSON output format. Default value - `true`.
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- [output_format_json_quote_64bit_integers](/docs/en/operations/settings/settings-formats.md/#output_format_json_quote_64bit_integers) - controls quoting of 64-bit integers in JSON output format. Default value - `true`.
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- [output_format_json_quote_64bit_floats](/docs/en/operations/settings/settings-formats.md/#output_format_json_quote_64bit_floats) - controls quoting of 64-bit floats in JSON output format. Default value - `false`.
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- [output_format_json_quote_64bit_floats](/docs/en/operations/settings/settings-formats.md/#output_format_json_quote_64bit_floats) - controls quoting of 64-bit floats in JSON output format. Default value - `false`.
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- [output_format_json_quote_denormals](/docs/en/operations/settings/settings-formats.md/#output_format_json_quote_denormals) - enables '+nan', '-nan', '+inf', '-inf' outputs in JSON output format. Default value - `false`.
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- [output_format_json_quote_denormals](/docs/en/operations/settings/settings-formats.md/#output_format_json_quote_denormals) - enables '+nan', '-nan', '+inf', '-inf' outputs in JSON output format. Default value - `false`.
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@ -752,6 +752,17 @@ Possible values:
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Default value: 0.
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Default value: 0.
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### input_format_json_empty_as_default {#input_format_json_empty_as_default}
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When enabled, replace empty input fields in JSON with default values. For complex default expressions `input_format_defaults_for_omitted_fields` must be enabled too.
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Possible values:
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+ 0 — Disable.
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+ 1 — Enable.
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Default value: 0.
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## TSV format settings {#tsv-format-settings}
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## TSV format settings {#tsv-format-settings}
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### input_format_tsv_empty_as_default {#input_format_tsv_empty_as_default}
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### input_format_tsv_empty_as_default {#input_format_tsv_empty_as_default}
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@ -1144,6 +1144,7 @@ class IColumn;
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M(Bool, input_format_try_infer_variants, false, "Try to infer the Variant type in text formats when there is more than one possible type for column/array elements", 0) \
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M(Bool, input_format_try_infer_variants, false, "Try to infer the Variant type in text formats when there is more than one possible type for column/array elements", 0) \
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M(Bool, type_json_skip_duplicated_paths, false, "When enabled, during parsing JSON object into JSON type duplicated paths will be ignored and only the first one will be inserted instead of an exception", 0) \
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M(Bool, type_json_skip_duplicated_paths, false, "When enabled, during parsing JSON object into JSON type duplicated paths will be ignored and only the first one will be inserted instead of an exception", 0) \
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M(UInt64, input_format_json_max_depth, 1000, "Maximum depth of a field in JSON. This is not a strict limit, it does not have to be applied precisely.", 0) \
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M(UInt64, input_format_json_max_depth, 1000, "Maximum depth of a field in JSON. This is not a strict limit, it does not have to be applied precisely.", 0) \
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M(Bool, input_format_json_empty_as_default, false, "Treat empty fields in JSON input as default values.", 0) \
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M(Bool, input_format_try_infer_integers, true, "Try to infer integers instead of floats while schema inference in text formats", 0) \
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M(Bool, input_format_try_infer_integers, true, "Try to infer integers instead of floats while schema inference in text formats", 0) \
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M(Bool, input_format_try_infer_dates, true, "Try to infer dates from string fields while schema inference in text formats", 0) \
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M(Bool, input_format_try_infer_dates, true, "Try to infer dates from string fields while schema inference in text formats", 0) \
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M(Bool, input_format_try_infer_datetimes, true, "Try to infer datetimes from string fields while schema inference in text formats", 0) \
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M(Bool, input_format_try_infer_datetimes, true, "Try to infer datetimes from string fields while schema inference in text formats", 0) \
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@ -71,6 +71,7 @@ static std::initializer_list<std::pair<ClickHouseVersion, SettingsChangesHistory
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},
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},
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{"24.9",
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{"24.9",
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{
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{
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{"input_format_json_empty_as_default", false, false, "Added new setting to allow to treat empty fields in JSON input as default values."},
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{"input_format_try_infer_variants", false, false, "Try to infer Variant type in text formats when there is more than one possible type for column/array elements"},
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{"input_format_try_infer_variants", false, false, "Try to infer Variant type in text formats when there is more than one possible type for column/array elements"},
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{"join_output_by_rowlist_perkey_rows_threshold", 0, 5, "The lower limit of per-key average rows in the right table to determine whether to output by row list in hash join."},
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{"join_output_by_rowlist_perkey_rows_threshold", 0, 5, "The lower limit of per-key average rows in the right table to determine whether to output by row list in hash join."},
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{"create_if_not_exists", false, false, "New setting."},
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{"create_if_not_exists", false, false, "New setting."},
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@ -11,6 +11,7 @@
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#include <IO/WriteBufferFromString.h>
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#include <IO/WriteBufferFromString.h>
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#include <Formats/FormatSettings.h>
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#include <Formats/FormatSettings.h>
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#include <Formats/JSONUtils.h>
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namespace DB
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namespace DB
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{
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{
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@ -615,28 +616,49 @@ void SerializationArray::serializeTextJSONPretty(const IColumn & column, size_t
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}
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}
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void SerializationArray::deserializeTextJSON(IColumn & column, ReadBuffer & istr, const FormatSettings & settings) const
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template <typename ReturnType>
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ReturnType SerializationArray::deserializeTextJSONImpl(IColumn & column, ReadBuffer & istr, const FormatSettings & settings) const
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{
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{
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deserializeTextImpl(column, istr,
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auto deserialize_nested = [&settings, this](IColumn & nested_column, ReadBuffer & buf) -> ReturnType
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[&](IColumn & nested_column)
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{
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if constexpr (std::is_same_v<ReturnType, void>)
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{
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{
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if (settings.null_as_default && !isColumnNullableOrLowCardinalityNullable(nested_column))
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if (settings.null_as_default && !isColumnNullableOrLowCardinalityNullable(nested_column))
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SerializationNullable::deserializeNullAsDefaultOrNestedTextJSON(nested_column, istr, settings, nested);
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SerializationNullable::deserializeNullAsDefaultOrNestedTextJSON(nested_column, buf, settings, nested);
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else
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else
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nested->deserializeTextJSON(nested_column, istr, settings);
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nested->deserializeTextJSON(nested_column, buf, settings);
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}, false);
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}
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else
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{
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if (settings.null_as_default && !isColumnNullableOrLowCardinalityNullable(nested_column))
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return SerializationNullable::tryDeserializeNullAsDefaultOrNestedTextJSON(nested_column, buf, settings, nested);
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return nested->tryDeserializeTextJSON(nested_column, buf, settings);
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}
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};
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if (settings.json.empty_as_default)
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return deserializeTextImpl<ReturnType>(column, istr,
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[&deserialize_nested, &istr](IColumn & nested_column) -> ReturnType
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{
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return JSONUtils::deserializeEmpyStringAsDefaultOrNested<ReturnType>(nested_column, istr, deserialize_nested);
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}, false);
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else
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return deserializeTextImpl<ReturnType>(column, istr,
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[&deserialize_nested, &istr](IColumn & nested_column) -> ReturnType
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{
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return deserialize_nested(nested_column, istr);
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}, false);
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}
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void SerializationArray::deserializeTextJSON(IColumn & column, ReadBuffer & istr, const FormatSettings & settings) const
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{
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deserializeTextJSONImpl<void>(column, istr, settings);
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}
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}
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bool SerializationArray::tryDeserializeTextJSON(IColumn & column, ReadBuffer & istr, const FormatSettings & settings) const
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bool SerializationArray::tryDeserializeTextJSON(IColumn & column, ReadBuffer & istr, const FormatSettings & settings) const
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{
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{
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auto read_nested = [&](IColumn & nested_column)
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return deserializeTextJSONImpl<bool>(column, istr, settings);
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{
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if (settings.null_as_default && !isColumnNullableOrLowCardinalityNullable(nested_column))
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return SerializationNullable::tryDeserializeNullAsDefaultOrNestedTextJSON(nested_column, istr, settings, nested);
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return nested->tryDeserializeTextJSON(nested_column, istr, settings);
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};
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return deserializeTextImpl<bool>(column, istr, std::move(read_nested), false);
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}
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}
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@ -82,6 +82,10 @@ public:
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SerializationPtr create(const SerializationPtr & prev) const override;
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SerializationPtr create(const SerializationPtr & prev) const override;
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ColumnPtr create(const ColumnPtr & prev) const override;
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ColumnPtr create(const ColumnPtr & prev) const override;
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};
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};
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private:
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template <typename ReturnType>
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ReturnType deserializeTextJSONImpl(IColumn & column, ReadBuffer & istr, const FormatSettings & settings) const;
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};
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};
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}
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}
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@ -6,6 +6,7 @@
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#include <Columns/ColumnMap.h>
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#include <Columns/ColumnMap.h>
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#include <Core/Field.h>
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#include <Core/Field.h>
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#include <Formats/FormatSettings.h>
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#include <Formats/FormatSettings.h>
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#include <Formats/JSONUtils.h>
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#include <Common/assert_cast.h>
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#include <Common/assert_cast.h>
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#include <Common/quoteString.h>
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#include <Common/quoteString.h>
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#include <IO/WriteHelpers.h>
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#include <IO/WriteHelpers.h>
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@ -316,28 +317,52 @@ void SerializationMap::serializeTextJSONPretty(const IColumn & column, size_t ro
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}
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}
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void SerializationMap::deserializeTextJSON(IColumn & column, ReadBuffer & istr, const FormatSettings & settings) const
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template <typename ReturnType>
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ReturnType SerializationMap::deserializeTextJSONImpl(IColumn & column, ReadBuffer & istr, const FormatSettings & settings) const
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{
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{
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deserializeTextImpl(column, istr,
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auto deserialize_nested = [&settings](IColumn & subcolumn, ReadBuffer & buf, const SerializationPtr & subcolumn_serialization) -> ReturnType
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[&settings](ReadBuffer & buf, const SerializationPtr & subcolumn_serialization, IColumn & subcolumn)
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{
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if constexpr (std::is_same_v<ReturnType, void>)
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{
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{
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if (settings.null_as_default && !isColumnNullableOrLowCardinalityNullable(subcolumn))
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if (settings.null_as_default && !isColumnNullableOrLowCardinalityNullable(subcolumn))
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SerializationNullable::deserializeNullAsDefaultOrNestedTextJSON(subcolumn, buf, settings, subcolumn_serialization);
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SerializationNullable::deserializeNullAsDefaultOrNestedTextJSON(subcolumn, buf, settings, subcolumn_serialization);
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else
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else
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subcolumn_serialization->deserializeTextJSON(subcolumn, buf, settings);
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subcolumn_serialization->deserializeTextJSON(subcolumn, buf, settings);
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});
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}
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else
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{
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if (settings.null_as_default && !isColumnNullableOrLowCardinalityNullable(subcolumn))
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return SerializationNullable::tryDeserializeNullAsDefaultOrNestedTextJSON(subcolumn, buf, settings, subcolumn_serialization);
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return subcolumn_serialization->tryDeserializeTextJSON(subcolumn, buf, settings);
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}
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};
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if (settings.json.empty_as_default)
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return deserializeTextImpl<ReturnType>(column, istr,
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[&deserialize_nested](ReadBuffer & buf, const SerializationPtr & subcolumn_serialization, IColumn & subcolumn) -> ReturnType
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{
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return JSONUtils::deserializeEmpyStringAsDefaultOrNested<ReturnType>(subcolumn, buf,
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[&deserialize_nested, &subcolumn_serialization](IColumn & subcolumn_, ReadBuffer & buf_) -> ReturnType
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{
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return deserialize_nested(subcolumn_, buf_, subcolumn_serialization);
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});
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});
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else
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return deserializeTextImpl<ReturnType>(column, istr,
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[&deserialize_nested](ReadBuffer & buf, const SerializationPtr & subcolumn_serialization, IColumn & subcolumn) -> ReturnType
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{
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return deserialize_nested(subcolumn, buf, subcolumn_serialization);
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});
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}
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void SerializationMap::deserializeTextJSON(IColumn & column, ReadBuffer & istr, const FormatSettings & settings) const
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{
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deserializeTextJSONImpl<void>(column, istr, settings);
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}
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}
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bool SerializationMap::tryDeserializeTextJSON(IColumn & column, ReadBuffer & istr, const FormatSettings & settings) const
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bool SerializationMap::tryDeserializeTextJSON(IColumn & column, ReadBuffer & istr, const FormatSettings & settings) const
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{
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{
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auto reader = [&settings](ReadBuffer & buf, const SerializationPtr & subcolumn_serialization, IColumn & subcolumn)
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return deserializeTextJSONImpl<bool>(column, istr, settings);
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{
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if (settings.null_as_default && !isColumnNullableOrLowCardinalityNullable(subcolumn))
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return SerializationNullable::tryDeserializeNullAsDefaultOrNestedTextJSON(subcolumn, buf, settings, subcolumn_serialization);
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return subcolumn_serialization->tryDeserializeTextJSON(subcolumn, buf, settings);
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};
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return deserializeTextImpl<bool>(column, istr, reader);
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}
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}
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void SerializationMap::serializeTextXML(const IColumn & column, size_t row_num, WriteBuffer & ostr, const FormatSettings & settings) const
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void SerializationMap::serializeTextXML(const IColumn & column, size_t row_num, WriteBuffer & ostr, const FormatSettings & settings) const
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@ -74,6 +74,9 @@ private:
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template <typename ReturnType = void, typename Reader>
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template <typename ReturnType = void, typename Reader>
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ReturnType deserializeTextImpl(IColumn & column, ReadBuffer & istr, Reader && reader) const;
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ReturnType deserializeTextImpl(IColumn & column, ReadBuffer & istr, Reader && reader) const;
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template <typename ReturnType>
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ReturnType deserializeTextJSONImpl(IColumn & column, ReadBuffer & istr, const FormatSettings & settings) const;
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};
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};
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}
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}
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@ -5,6 +5,7 @@
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#include <Core/Field.h>
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#include <Core/Field.h>
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#include <Columns/ColumnTuple.h>
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#include <Columns/ColumnTuple.h>
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#include <Common/assert_cast.h>
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#include <Common/assert_cast.h>
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#include <Formats/JSONUtils.h>
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#include <IO/WriteHelpers.h>
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#include <IO/WriteHelpers.h>
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#include <IO/ReadHelpers.h>
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#include <IO/ReadHelpers.h>
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#include <IO/ReadBufferFromString.h>
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#include <IO/ReadBufferFromString.h>
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@ -313,27 +314,9 @@ void SerializationTuple::serializeTextJSONPretty(const IColumn & column, size_t
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}
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}
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template <typename ReturnType>
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template <typename ReturnType>
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ReturnType SerializationTuple::deserializeTextJSONImpl(IColumn & column, ReadBuffer & istr, const FormatSettings & settings) const
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ReturnType SerializationTuple::deserializeTupleJSONImpl(IColumn & column, ReadBuffer & istr, const FormatSettings & settings, auto && deserialize_element) const
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{
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{
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static constexpr bool throw_exception = std::is_same_v<ReturnType, void>;
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static constexpr auto throw_exception = std::is_same_v<ReturnType, void>;
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auto deserialize_element = [&](IColumn & element_column, size_t element_pos)
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{
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if constexpr (throw_exception)
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{
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if (settings.null_as_default && !isColumnNullableOrLowCardinalityNullable(element_column))
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SerializationNullable::deserializeNullAsDefaultOrNestedTextJSON(element_column, istr, settings, elems[element_pos]);
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else
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elems[element_pos]->deserializeTextJSON(element_column, istr, settings);
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return true;
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}
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else
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{
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if (settings.null_as_default && !isColumnNullableOrLowCardinalityNullable(element_column))
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return SerializationNullable::tryDeserializeNullAsDefaultOrNestedTextJSON(element_column, istr, settings, elems[element_pos]);
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return elems[element_pos]->tryDeserializeTextJSON(element_column, istr, settings);
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}
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};
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if (settings.json.read_named_tuples_as_objects
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if (settings.json.read_named_tuples_as_objects
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&& have_explicit_names)
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&& have_explicit_names)
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@ -506,12 +489,51 @@ ReturnType SerializationTuple::deserializeTextJSONImpl(IColumn & column, ReadBuf
|
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}
|
}
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}
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}
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|
|
||||||
void SerializationTuple::deserializeTextJSON(DB::IColumn & column, DB::ReadBuffer & istr, const DB::FormatSettings & settings) const
|
template <typename ReturnType>
|
||||||
|
ReturnType SerializationTuple::deserializeTextJSONImpl(IColumn & column, ReadBuffer & istr, const FormatSettings & settings) const
|
||||||
{
|
{
|
||||||
deserializeTextJSONImpl(column, istr, settings);
|
auto deserialize_nested = [&settings](IColumn & nested_column, ReadBuffer & buf, const SerializationPtr & nested_column_serialization) -> ReturnType
|
||||||
|
{
|
||||||
|
if constexpr (std::is_same_v<ReturnType, void>)
|
||||||
|
{
|
||||||
|
if (settings.null_as_default && !isColumnNullableOrLowCardinalityNullable(nested_column))
|
||||||
|
SerializationNullable::deserializeNullAsDefaultOrNestedTextJSON(nested_column, buf, settings, nested_column_serialization);
|
||||||
|
else
|
||||||
|
nested_column_serialization->deserializeTextJSON(nested_column, buf, settings);
|
||||||
|
}
|
||||||
|
else
|
||||||
|
{
|
||||||
|
if (settings.null_as_default && !isColumnNullableOrLowCardinalityNullable(nested_column))
|
||||||
|
return SerializationNullable::tryDeserializeNullAsDefaultOrNestedTextJSON(nested_column, buf, settings, nested_column_serialization);
|
||||||
|
else
|
||||||
|
return nested_column_serialization->tryDeserializeTextJSON(nested_column, buf, settings);
|
||||||
|
}
|
||||||
|
};
|
||||||
|
|
||||||
|
if (settings.json.empty_as_default)
|
||||||
|
return deserializeTupleJSONImpl<ReturnType>(column, istr, settings,
|
||||||
|
[&deserialize_nested, &istr, this](IColumn & nested_column, size_t element_pos) -> ReturnType
|
||||||
|
{
|
||||||
|
return JSONUtils::deserializeEmpyStringAsDefaultOrNested<ReturnType>(nested_column, istr,
|
||||||
|
[&deserialize_nested, element_pos, this](IColumn & nested_column_, ReadBuffer & buf) -> ReturnType
|
||||||
|
{
|
||||||
|
return deserialize_nested(nested_column_, buf, elems[element_pos]);
|
||||||
|
});
|
||||||
|
});
|
||||||
|
else
|
||||||
|
return deserializeTupleJSONImpl<ReturnType>(column, istr, settings,
|
||||||
|
[&deserialize_nested, &istr, this](IColumn & nested_column, size_t element_pos) -> ReturnType
|
||||||
|
{
|
||||||
|
return deserialize_nested(nested_column, istr, elems[element_pos]);
|
||||||
|
});
|
||||||
}
|
}
|
||||||
|
|
||||||
bool SerializationTuple::tryDeserializeTextJSON(DB::IColumn & column, DB::ReadBuffer & istr, const DB::FormatSettings & settings) const
|
void SerializationTuple::deserializeTextJSON(IColumn & column, ReadBuffer & istr, const FormatSettings & settings) const
|
||||||
|
{
|
||||||
|
deserializeTextJSONImpl<void>(column, istr, settings);
|
||||||
|
}
|
||||||
|
|
||||||
|
bool SerializationTuple::tryDeserializeTextJSON(IColumn & column, ReadBuffer & istr, const FormatSettings & settings) const
|
||||||
{
|
{
|
||||||
return deserializeTextJSONImpl<bool>(column, istr, settings);
|
return deserializeTextJSONImpl<bool>(column, istr, settings);
|
||||||
}
|
}
|
||||||
|
@ -81,7 +81,10 @@ private:
|
|||||||
template <typename ReturnType = void>
|
template <typename ReturnType = void>
|
||||||
ReturnType deserializeTextImpl(IColumn & column, ReadBuffer & istr, const FormatSettings & settings, bool whole) const;
|
ReturnType deserializeTextImpl(IColumn & column, ReadBuffer & istr, const FormatSettings & settings, bool whole) const;
|
||||||
|
|
||||||
template <typename ReturnType = void>
|
template <typename ReturnType>
|
||||||
|
ReturnType deserializeTupleJSONImpl(IColumn & column, ReadBuffer & istr, const FormatSettings & settings, auto && deserialize_element) const;
|
||||||
|
|
||||||
|
template <typename ReturnType>
|
||||||
ReturnType deserializeTextJSONImpl(IColumn & column, ReadBuffer & istr, const FormatSettings & settings) const;
|
ReturnType deserializeTextJSONImpl(IColumn & column, ReadBuffer & istr, const FormatSettings & settings) const;
|
||||||
|
|
||||||
template <typename ReturnType = void>
|
template <typename ReturnType = void>
|
||||||
|
@ -152,6 +152,7 @@ FormatSettings getFormatSettings(const ContextPtr & context, const Settings & se
|
|||||||
format_settings.json.try_infer_objects_as_tuples = settings.input_format_json_try_infer_named_tuples_from_objects;
|
format_settings.json.try_infer_objects_as_tuples = settings.input_format_json_try_infer_named_tuples_from_objects;
|
||||||
format_settings.json.throw_on_bad_escape_sequence = settings.input_format_json_throw_on_bad_escape_sequence;
|
format_settings.json.throw_on_bad_escape_sequence = settings.input_format_json_throw_on_bad_escape_sequence;
|
||||||
format_settings.json.ignore_unnecessary_fields = settings.input_format_json_ignore_unnecessary_fields;
|
format_settings.json.ignore_unnecessary_fields = settings.input_format_json_ignore_unnecessary_fields;
|
||||||
|
format_settings.json.empty_as_default = settings.input_format_json_empty_as_default;
|
||||||
format_settings.json.type_json_skip_duplicated_paths = settings.type_json_skip_duplicated_paths;
|
format_settings.json.type_json_skip_duplicated_paths = settings.type_json_skip_duplicated_paths;
|
||||||
format_settings.null_as_default = settings.input_format_null_as_default;
|
format_settings.null_as_default = settings.input_format_null_as_default;
|
||||||
format_settings.force_null_for_omitted_fields = settings.input_format_force_null_for_omitted_fields;
|
format_settings.force_null_for_omitted_fields = settings.input_format_force_null_for_omitted_fields;
|
||||||
|
@ -237,6 +237,7 @@ struct FormatSettings
|
|||||||
bool infer_incomplete_types_as_strings = true;
|
bool infer_incomplete_types_as_strings = true;
|
||||||
bool throw_on_bad_escape_sequence = true;
|
bool throw_on_bad_escape_sequence = true;
|
||||||
bool ignore_unnecessary_fields = true;
|
bool ignore_unnecessary_fields = true;
|
||||||
|
bool empty_as_default = false;
|
||||||
bool type_json_skip_duplicated_paths = false;
|
bool type_json_skip_duplicated_paths = false;
|
||||||
} json{};
|
} json{};
|
||||||
|
|
||||||
|
@ -2,12 +2,14 @@
|
|||||||
#include <Formats/JSONUtils.h>
|
#include <Formats/JSONUtils.h>
|
||||||
#include <Formats/ReadSchemaUtils.h>
|
#include <Formats/ReadSchemaUtils.h>
|
||||||
#include <Formats/EscapingRuleUtils.h>
|
#include <Formats/EscapingRuleUtils.h>
|
||||||
|
#include <IO/PeekableReadBuffer.h>
|
||||||
#include <IO/ReadBufferFromString.h>
|
#include <IO/ReadBufferFromString.h>
|
||||||
#include <IO/WriteBufferValidUTF8.h>
|
#include <IO/WriteBufferValidUTF8.h>
|
||||||
#include <DataTypes/Serializations/SerializationNullable.h>
|
#include <DataTypes/Serializations/SerializationNullable.h>
|
||||||
#include <DataTypes/DataTypeNullable.h>
|
#include <DataTypes/DataTypeNullable.h>
|
||||||
#include <DataTypes/DataTypeObjectDeprecated.h>
|
#include <DataTypes/DataTypeObjectDeprecated.h>
|
||||||
#include <DataTypes/DataTypeFactory.h>
|
#include <DataTypes/DataTypeFactory.h>
|
||||||
|
#include <Common/assert_cast.h>
|
||||||
|
|
||||||
#include <base/find_symbols.h>
|
#include <base/find_symbols.h>
|
||||||
|
|
||||||
@ -286,11 +288,19 @@ namespace JSONUtils
|
|||||||
return true;
|
return true;
|
||||||
}
|
}
|
||||||
|
|
||||||
if (as_nullable)
|
auto deserialize = [as_nullable, &format_settings, &serialization](IColumn & column_, ReadBuffer & buf) -> bool
|
||||||
return SerializationNullable::deserializeNullAsDefaultOrNestedTextJSON(column, in, format_settings, serialization);
|
{
|
||||||
|
if (as_nullable)
|
||||||
|
return SerializationNullable::deserializeNullAsDefaultOrNestedTextJSON(column_, buf, format_settings, serialization);
|
||||||
|
|
||||||
serialization->deserializeTextJSON(column, in, format_settings);
|
serialization->deserializeTextJSON(column_, buf, format_settings);
|
||||||
return true;
|
return true;
|
||||||
|
};
|
||||||
|
|
||||||
|
if (format_settings.json.empty_as_default)
|
||||||
|
return JSONUtils::deserializeEmpyStringAsDefaultOrNested<bool, false>(column, in, deserialize);
|
||||||
|
else
|
||||||
|
return deserialize(column, in);
|
||||||
}
|
}
|
||||||
catch (Exception & e)
|
catch (Exception & e)
|
||||||
{
|
{
|
||||||
@ -920,6 +930,78 @@ namespace JSONUtils
|
|||||||
}
|
}
|
||||||
}
|
}
|
||||||
|
|
||||||
|
template <typename ReturnType, bool default_column_return_value>
|
||||||
|
ReturnType deserializeEmpyStringAsDefaultOrNested(IColumn & column, ReadBuffer & istr, const NestedDeserialize<ReturnType> & deserialize_nested)
|
||||||
|
{
|
||||||
|
static constexpr auto throw_exception = std::is_same_v<ReturnType, void>;
|
||||||
|
|
||||||
|
static constexpr auto EMPTY_STRING = "\"\"";
|
||||||
|
static constexpr auto EMPTY_STRING_LENGTH = std::string_view(EMPTY_STRING).length();
|
||||||
|
|
||||||
|
if (istr.eof() || *istr.position() != EMPTY_STRING[0])
|
||||||
|
return deserialize_nested(column, istr);
|
||||||
|
|
||||||
|
auto do_deserialize = [](IColumn & column_, ReadBuffer & buf, auto && check_for_empty_string, auto && deserialize) -> ReturnType
|
||||||
|
{
|
||||||
|
if (check_for_empty_string(buf))
|
||||||
|
{
|
||||||
|
column_.insertDefault();
|
||||||
|
return ReturnType(default_column_return_value);
|
||||||
|
}
|
||||||
|
return deserialize(column_, buf);
|
||||||
|
};
|
||||||
|
|
||||||
|
if (istr.available() >= EMPTY_STRING_LENGTH)
|
||||||
|
{
|
||||||
|
/// We have enough data in buffer to check if we have an empty string.
|
||||||
|
auto check_for_empty_string = [](ReadBuffer & buf) -> bool
|
||||||
|
{
|
||||||
|
auto * pos = buf.position();
|
||||||
|
if (checkString(EMPTY_STRING, buf))
|
||||||
|
return true;
|
||||||
|
buf.position() = pos;
|
||||||
|
return false;
|
||||||
|
};
|
||||||
|
|
||||||
|
return do_deserialize(column, istr, check_for_empty_string, deserialize_nested);
|
||||||
|
}
|
||||||
|
|
||||||
|
/// We don't have enough data in buffer to check if we have an empty string.
|
||||||
|
/// Use PeekableReadBuffer to make a checkpoint before checking for an
|
||||||
|
/// empty string and rollback if check was failed.
|
||||||
|
|
||||||
|
auto check_for_empty_string = [](ReadBuffer & buf) -> bool
|
||||||
|
{
|
||||||
|
auto & peekable_buf = assert_cast<PeekableReadBuffer &>(buf);
|
||||||
|
peekable_buf.setCheckpoint();
|
||||||
|
SCOPE_EXIT(peekable_buf.dropCheckpoint());
|
||||||
|
if (checkString(EMPTY_STRING, peekable_buf))
|
||||||
|
return true;
|
||||||
|
peekable_buf.rollbackToCheckpoint();
|
||||||
|
return false;
|
||||||
|
};
|
||||||
|
|
||||||
|
auto deserialize_nested_with_check = [&deserialize_nested](IColumn & column_, ReadBuffer & buf) -> ReturnType
|
||||||
|
{
|
||||||
|
auto & peekable_buf = assert_cast<PeekableReadBuffer &>(buf);
|
||||||
|
if constexpr (throw_exception)
|
||||||
|
deserialize_nested(column_, peekable_buf);
|
||||||
|
else if (!deserialize_nested(column_, peekable_buf))
|
||||||
|
return ReturnType(false);
|
||||||
|
|
||||||
|
if (unlikely(peekable_buf.hasUnreadData()))
|
||||||
|
throw Exception(ErrorCodes::LOGICAL_ERROR, "Incorrect state while parsing JSON: PeekableReadBuffer has unread data in own memory: {}", String(peekable_buf.position(), peekable_buf.available()));
|
||||||
|
|
||||||
|
return ReturnType(true);
|
||||||
|
};
|
||||||
|
|
||||||
|
PeekableReadBuffer peekable_buf(istr, true);
|
||||||
|
return do_deserialize(column, peekable_buf, check_for_empty_string, deserialize_nested_with_check);
|
||||||
|
}
|
||||||
|
|
||||||
|
template void deserializeEmpyStringAsDefaultOrNested<void, true>(IColumn & column, ReadBuffer & istr, const NestedDeserialize<void> & deserialize_nested);
|
||||||
|
template bool deserializeEmpyStringAsDefaultOrNested<bool, true>(IColumn & column, ReadBuffer & istr, const NestedDeserialize<bool> & deserialize_nested);
|
||||||
|
template bool deserializeEmpyStringAsDefaultOrNested<bool, false>(IColumn & column, ReadBuffer & istr, const NestedDeserialize<bool> & deserialize_nested);
|
||||||
}
|
}
|
||||||
|
|
||||||
}
|
}
|
||||||
|
@ -8,6 +8,7 @@
|
|||||||
#include <IO/Progress.h>
|
#include <IO/Progress.h>
|
||||||
#include <Core/NamesAndTypes.h>
|
#include <Core/NamesAndTypes.h>
|
||||||
#include <Common/Stopwatch.h>
|
#include <Common/Stopwatch.h>
|
||||||
|
#include <functional>
|
||||||
#include <utility>
|
#include <utility>
|
||||||
|
|
||||||
namespace DB
|
namespace DB
|
||||||
@ -146,6 +147,16 @@ namespace JSONUtils
|
|||||||
|
|
||||||
bool skipUntilFieldInObject(ReadBuffer & in, const String & desired_field_name, const FormatSettings::JSON & settings);
|
bool skipUntilFieldInObject(ReadBuffer & in, const String & desired_field_name, const FormatSettings::JSON & settings);
|
||||||
void skipTheRestOfObject(ReadBuffer & in, const FormatSettings::JSON & settings);
|
void skipTheRestOfObject(ReadBuffer & in, const FormatSettings::JSON & settings);
|
||||||
|
|
||||||
|
template <typename ReturnType>
|
||||||
|
using NestedDeserialize = std::function<ReturnType(IColumn &, ReadBuffer &)>;
|
||||||
|
|
||||||
|
template <typename ReturnType, bool default_column_return_value = true>
|
||||||
|
ReturnType deserializeEmpyStringAsDefaultOrNested(IColumn & column, ReadBuffer & istr, const NestedDeserialize<ReturnType> & deserialize_nested);
|
||||||
|
|
||||||
|
extern template void deserializeEmpyStringAsDefaultOrNested<void, true>(IColumn & column, ReadBuffer & istr, const NestedDeserialize<void> & deserialize_nested);
|
||||||
|
extern template bool deserializeEmpyStringAsDefaultOrNested<bool, true>(IColumn & column, ReadBuffer & istr, const NestedDeserialize<bool> & deserialize_nested);
|
||||||
|
extern template bool deserializeEmpyStringAsDefaultOrNested<bool, false>(IColumn & column, ReadBuffer & istr, const NestedDeserialize<bool> & deserialize_nested);
|
||||||
}
|
}
|
||||||
|
|
||||||
}
|
}
|
||||||
|
@ -0,0 +1,47 @@
|
|||||||
|
-- Simple types
|
||||||
|
-- { echoOn }
|
||||||
|
SELECT x FROM format(JSONEachRow, 'x Date', '{"x":""}');
|
||||||
|
1970-01-01
|
||||||
|
SELECT x FROM format(JSONEachRow, 'x Date32', '{"x":""}');
|
||||||
|
1970-01-01
|
||||||
|
SELECT toTimeZone(x, 'UTC') FROM format(JSONEachRow, 'x DateTime', '{"x":""}');
|
||||||
|
1970-01-01 00:00:00
|
||||||
|
SELECT toTimeZone(x, 'UTC') FROM format(JSONEachRow, 'x DateTime64', '{"x":""}');
|
||||||
|
1970-01-01 00:00:00.000
|
||||||
|
SELECT x FROM format(JSONEachRow, 'x IPv4', '{"x":""}');
|
||||||
|
0.0.0.0
|
||||||
|
SELECT x FROM format(JSONEachRow, 'x IPv6', '{"x":""}');
|
||||||
|
::
|
||||||
|
SELECT x FROM format(JSONEachRow, 'x UUID', '{"x":""}');
|
||||||
|
00000000-0000-0000-0000-000000000000
|
||||||
|
-- { echoOn }
|
||||||
|
SELECT COUNT(DISTINCT col) FROM table1;
|
||||||
|
1
|
||||||
|
-- { echoOn }
|
||||||
|
SELECT * FROM table1 ORDER BY address ASC;
|
||||||
|
::
|
||||||
|
2001:db8:3333:4444:5555:6666:7777:8888
|
||||||
|
-- Nullable
|
||||||
|
-- { echoOn }
|
||||||
|
SELECT x FROM format(JSONEachRow, 'x Nullable(IPv6)', '{"x":""}');
|
||||||
|
\N
|
||||||
|
-- Compound types
|
||||||
|
SELECT x FROM format(JSONEachRow, 'x Array(UUID)', '{"x":["00000000-0000-0000-0000-000000000000","b15f852c-c41a-4fd6-9247-1929c841715e",""]}');
|
||||||
|
['00000000-0000-0000-0000-000000000000','b15f852c-c41a-4fd6-9247-1929c841715e','00000000-0000-0000-0000-000000000000']
|
||||||
|
SELECT x FROM format(JSONEachRow, 'x Array(Nullable(IPv6))', '{"x":["",""]}');
|
||||||
|
[NULL,NULL]
|
||||||
|
SELECT x FROM format(JSONEachRow, 'x Tuple(Date, IPv4, String)', '{"x":["", "", "abc"]}');
|
||||||
|
('1970-01-01','0.0.0.0','abc')
|
||||||
|
SELECT x FROM format(JSONEachRow, 'x Map(String, IPv6)', '{"x":{"abc": ""}}');
|
||||||
|
{'abc':'::'}
|
||||||
|
SELECT x FROM format(JSONEachRow, 'x Variant(Date, UUID)', '{"x":""}');
|
||||||
|
\N
|
||||||
|
-- Deep composition
|
||||||
|
SELECT x FROM format(JSONEachRow, 'x Array(Array(IPv6))', '{"x":[["2001:db8:3333:4444:CCCC:DDDD:EEEE:FFFF", ""], ["", "2001:db8:3333:4444:5555:6666:7777:8888"]]}');
|
||||||
|
[['2001:db8:3333:4444:cccc:dddd:eeee:ffff','::'],['::','2001:db8:3333:4444:5555:6666:7777:8888']]
|
||||||
|
SELECT x FROM format(JSONEachRow, 'x Variant(Date, Array(UUID))', '{"x":["", "b15f852c-c41a-4fd6-9247-1929c841715e"]}');
|
||||||
|
['00000000-0000-0000-0000-000000000000','b15f852c-c41a-4fd6-9247-1929c841715e']
|
||||||
|
SELECT x FROM format(JSONEachRow, 'x Tuple(Array(UUID), Tuple(UUID, Map(String, IPv6)))', '{"x":[[""], ["",{"abc":""}]]}');
|
||||||
|
(['00000000-0000-0000-0000-000000000000'],('00000000-0000-0000-0000-000000000000',{'abc':'::'}))
|
||||||
|
SELECT x FROM format(JSONEachRow, 'x Map(Tuple(Date,IPv4), Variant(UUID,IPv6))', '{"x":{["",""]:""}}');
|
||||||
|
{('1970-01-01','0.0.0.0'):NULL}
|
60
tests/queries/0_stateless/03222_json_empty_as_default.sql
Normal file
60
tests/queries/0_stateless/03222_json_empty_as_default.sql
Normal file
@ -0,0 +1,60 @@
|
|||||||
|
SET input_format_json_empty_as_default = 1, allow_experimental_variant_type = 1;
|
||||||
|
|
||||||
|
-- Simple types
|
||||||
|
-- { echoOn }
|
||||||
|
SELECT x FROM format(JSONEachRow, 'x Date', '{"x":""}');
|
||||||
|
SELECT x FROM format(JSONEachRow, 'x Date32', '{"x":""}');
|
||||||
|
SELECT toTimeZone(x, 'UTC') FROM format(JSONEachRow, 'x DateTime', '{"x":""}');
|
||||||
|
SELECT toTimeZone(x, 'UTC') FROM format(JSONEachRow, 'x DateTime64', '{"x":""}');
|
||||||
|
SELECT x FROM format(JSONEachRow, 'x IPv4', '{"x":""}');
|
||||||
|
SELECT x FROM format(JSONEachRow, 'x IPv6', '{"x":""}');
|
||||||
|
SELECT x FROM format(JSONEachRow, 'x UUID', '{"x":""}');
|
||||||
|
-- { echoOff }
|
||||||
|
|
||||||
|
-- Simple type AggregateFunction
|
||||||
|
DROP TABLE IF EXISTS table1;
|
||||||
|
CREATE TABLE table1(col AggregateFunction(uniq, UInt64)) ENGINE=Memory();
|
||||||
|
DROP TABLE IF EXISTS table2;
|
||||||
|
CREATE TABLE table2(UserID UInt64) ENGINE=Memory();
|
||||||
|
|
||||||
|
INSERT INTO table1 SELECT uniqState(UserID) FROM table2;
|
||||||
|
INSERT INTO table1 SELECT x FROM format(JSONEachRow, 'x AggregateFunction(uniq, UInt64)' AS T, '{"x":""}');
|
||||||
|
|
||||||
|
-- { echoOn }
|
||||||
|
SELECT COUNT(DISTINCT col) FROM table1;
|
||||||
|
-- { echoOff }
|
||||||
|
|
||||||
|
DROP TABLE table1;
|
||||||
|
DROP TABLE table2;
|
||||||
|
|
||||||
|
-- The setting input_format_defaults_for_omitted_fields determines the default value if enabled.
|
||||||
|
CREATE TABLE table1(address IPv6 DEFAULT toIPv6('2001:db8:3333:4444:5555:6666:7777:8888')) ENGINE=Memory();
|
||||||
|
|
||||||
|
SET input_format_defaults_for_omitted_fields = 0;
|
||||||
|
INSERT INTO table1 FORMAT JSONEachRow {"address":""};
|
||||||
|
|
||||||
|
SET input_format_defaults_for_omitted_fields = 1;
|
||||||
|
INSERT INTO table1 FORMAT JSONEachRow {"address":""};
|
||||||
|
|
||||||
|
-- { echoOn }
|
||||||
|
SELECT * FROM table1 ORDER BY address ASC;
|
||||||
|
-- { echoOff }
|
||||||
|
|
||||||
|
DROP TABLE table1;
|
||||||
|
|
||||||
|
-- Nullable
|
||||||
|
-- { echoOn }
|
||||||
|
SELECT x FROM format(JSONEachRow, 'x Nullable(IPv6)', '{"x":""}');
|
||||||
|
|
||||||
|
-- Compound types
|
||||||
|
SELECT x FROM format(JSONEachRow, 'x Array(UUID)', '{"x":["00000000-0000-0000-0000-000000000000","b15f852c-c41a-4fd6-9247-1929c841715e",""]}');
|
||||||
|
SELECT x FROM format(JSONEachRow, 'x Array(Nullable(IPv6))', '{"x":["",""]}');
|
||||||
|
SELECT x FROM format(JSONEachRow, 'x Tuple(Date, IPv4, String)', '{"x":["", "", "abc"]}');
|
||||||
|
SELECT x FROM format(JSONEachRow, 'x Map(String, IPv6)', '{"x":{"abc": ""}}');
|
||||||
|
SELECT x FROM format(JSONEachRow, 'x Variant(Date, UUID)', '{"x":""}');
|
||||||
|
|
||||||
|
-- Deep composition
|
||||||
|
SELECT x FROM format(JSONEachRow, 'x Array(Array(IPv6))', '{"x":[["2001:db8:3333:4444:CCCC:DDDD:EEEE:FFFF", ""], ["", "2001:db8:3333:4444:5555:6666:7777:8888"]]}');
|
||||||
|
SELECT x FROM format(JSONEachRow, 'x Variant(Date, Array(UUID))', '{"x":["", "b15f852c-c41a-4fd6-9247-1929c841715e"]}');
|
||||||
|
SELECT x FROM format(JSONEachRow, 'x Tuple(Array(UUID), Tuple(UUID, Map(String, IPv6)))', '{"x":[[""], ["",{"abc":""}]]}');
|
||||||
|
SELECT x FROM format(JSONEachRow, 'x Map(Tuple(Date,IPv4), Variant(UUID,IPv6))', '{"x":{["",""]:""}}');
|
@ -0,0 +1,8 @@
|
|||||||
|
Array(UUID)
|
||||||
|
{"x":["00000000-0000-0000-0000-000000000000","b15f852c-c41a-4fd6-9247-1929c841715e","00000000-0000-0000-0000-000000000000"]}
|
||||||
|
{"x":["00000000-0000-0000-0000-000000000000","b15f852c-c41a-4fd6-9247-1929c841715e","00000000-0000-0000-0000-000000000000"]}
|
||||||
|
{"x":["00000000-0000-0000-0000-000000000000","b15f852c-c41a-4fd6-9247-1929c841715e","00000000-0000-0000-0000-000000000000"]}
|
||||||
|
Tuple(Array(UUID), Tuple(UUID, Map(String, IPv6)))
|
||||||
|
{"x":[["00000000-0000-0000-0000-000000000000"],["00000000-0000-0000-0000-000000000000",{"abc":"::"}]]}
|
||||||
|
{"x":[["00000000-0000-0000-0000-000000000000"],["00000000-0000-0000-0000-000000000000",{"abc":"::"}]]}
|
||||||
|
{"x":[["00000000-0000-0000-0000-000000000000"],["00000000-0000-0000-0000-000000000000",{"abc":"::"}]]}
|
31
tests/queries/0_stateless/03222_json_empty_as_default_small_read_buffer.sh
Executable file
31
tests/queries/0_stateless/03222_json_empty_as_default_small_read_buffer.sh
Executable file
@ -0,0 +1,31 @@
|
|||||||
|
#!/usr/bin/env bash
|
||||||
|
# Tags: no-parallel
|
||||||
|
|
||||||
|
CURDIR=$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)
|
||||||
|
# shellcheck source=../shell_config.sh
|
||||||
|
. "$CURDIR"/../shell_config.sh
|
||||||
|
|
||||||
|
DATA_FILE=$CLICKHOUSE_TEST_UNIQUE_NAME.json
|
||||||
|
|
||||||
|
# Wrapper for clickhouse-client to always output in JSONEachRow format, that
|
||||||
|
# way format settings will not affect output.
|
||||||
|
function clickhouse_local()
|
||||||
|
{
|
||||||
|
$CLICKHOUSE_LOCAL --output-format JSONEachRow "$@"
|
||||||
|
}
|
||||||
|
|
||||||
|
echo 'Array(UUID)'
|
||||||
|
echo '{"x":["00000000-0000-0000-0000-000000000000","b15f852c-c41a-4fd6-9247-1929c841715e",""]}' > $DATA_FILE
|
||||||
|
# Use increasingly smaller read buffers.
|
||||||
|
clickhouse_local -q "SELECT x FROM file('$DATA_FILE', 'JSONEachRow', 'x Array(UUID)') SETTINGS input_format_json_empty_as_default=1, input_format_parallel_parsing=0, storage_file_read_method='read', max_read_buffer_size=4"
|
||||||
|
clickhouse_local -q "SELECT x FROM file('$DATA_FILE', 'JSONEachRow', 'x Array(UUID)') SETTINGS input_format_json_empty_as_default=1, input_format_parallel_parsing=0, storage_file_read_method='read', max_read_buffer_size=2"
|
||||||
|
clickhouse_local -q "SELECT x FROM file('$DATA_FILE', 'JSONEachRow', 'x Array(UUID)') SETTINGS input_format_json_empty_as_default=1, input_format_parallel_parsing=0, storage_file_read_method='read', max_read_buffer_size=1"
|
||||||
|
|
||||||
|
echo 'Tuple(Array(UUID), Tuple(UUID, Map(String, IPv6)))'
|
||||||
|
echo '{"x":[[""], ["",{"abc":""}]]}' > $DATA_FILE
|
||||||
|
# Use increasingly smaller read buffers.
|
||||||
|
clickhouse_local -q "SELECT x FROM file('$DATA_FILE', 'JSONEachRow', 'x Tuple(Array(UUID), Tuple(UUID, Map(String, IPv6)))') SETTINGS input_format_json_empty_as_default=1, input_format_parallel_parsing=0, storage_file_read_method='read', max_read_buffer_size=16"
|
||||||
|
clickhouse_local -q "SELECT x FROM file('$DATA_FILE', 'JSONEachRow', 'x Tuple(Array(UUID), Tuple(UUID, Map(String, IPv6)))') SETTINGS input_format_json_empty_as_default=1, input_format_parallel_parsing=0, storage_file_read_method='read', max_read_buffer_size=8"
|
||||||
|
clickhouse_local -q "SELECT x FROM file('$DATA_FILE', 'JSONEachRow', 'x Tuple(Array(UUID), Tuple(UUID, Map(String, IPv6)))') SETTINGS input_format_json_empty_as_default=1, input_format_parallel_parsing=0, storage_file_read_method='read', max_read_buffer_size=1"
|
||||||
|
|
||||||
|
rm $DATA_FILE
|
Loading…
Reference in New Issue
Block a user