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33 lines
1.3 KiB
Markdown
33 lines
1.3 KiB
Markdown
---
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slug: /en/operations/system-tables/settings_changes
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---
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# settings_changes
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Contains information about setting changes in previous ClickHouse versions.
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Columns:
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- `version` ([String](../../sql-reference/data-types/string.md)) — The ClickHouse version in which settings were changed
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- `changes` ([Array](../../sql-reference/data-types/array.md) of [Tuple](../../sql-reference/data-types/tuple.md)) — A description of the setting changes: (setting name, previous value, new value, reason for the change)
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**Example**
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``` sql
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SELECT *
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FROM system.settings_changes
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WHERE version = '23.5'
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FORMAT Vertical
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```
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``` text
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Row 1:
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──────
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version: 23.5
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changes: [('input_format_parquet_preserve_order','1','0','Allow Parquet reader to reorder rows for better parallelism.'),('parallelize_output_from_storages','0','1','Allow parallelism when executing queries that read from file/url/s3/etc. This may reorder rows.'),('use_with_fill_by_sorting_prefix','0','1','Columns preceding WITH FILL columns in ORDER BY clause form sorting prefix. Rows with different values in sorting prefix are filled independently'),('output_format_parquet_compliant_nested_types','0','1','Change an internal field name in output Parquet file schema.')]
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```
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**See also**
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- [Settings](../../operations/settings/index.md#session-settings-intro)
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- [system.settings](settings.md)
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