> ## Documentation Index
> Fetch the complete documentation index at: https://clickhouse.com/docs/llms.txt
> Use this file to discover all available pages before exploring further.

# schema_inference_* session settings

> ClickHouse session settings in the schema_inference_* generated group.

export const SettingsInfoBlock = ({type, default_value, changeable_without_restart}) => {
  return <div className="not-prose" style={{
    display: "flex",
    flexWrap: "wrap",
    alignItems: "baseline",
    columnGap: "0.5rem",
    rowGap: "0.125rem",
    margin: "0.375rem 0",
    fontSize: "0.8125rem",
    lineHeight: "1.125rem"
  }}>
      <div style={{
    fontWeight: 600,
    opacity: 0.72
  }}>Type</div>
      <div style={{
    overflowWrap: "anywhere"
  }}>{type}</div>
      <div style={{
    fontWeight: 600,
    opacity: 0.72,
    marginInlineStart: "0.5rem"
  }}>Default</div>
      <div style={{
    overflowWrap: "anywhere"
  }}>{default_value}</div>
      {changeable_without_restart && <div style={{
    fontWeight: 600,
    opacity: 0.72,
    marginInlineStart: "0.5rem"
  }}>
          Changeable without restart
        </div>}
      {changeable_without_restart && <div style={{
    overflowWrap: "anywhere"
  }}>
          {changeable_without_restart}
        </div>}
    </div>;
};

These settings are available in [system.settings](/docs/reference/system-tables/settings) and are autogenerated from [source](https://github.com/ClickHouse/ClickHouse/blob/master/src/Core/Settings.cpp).

<h2 id="schema_inference_cache_require_modification_time_for_url">
  schema\_inference\_cache\_require\_modification\_time\_for\_url
</h2>

<SettingsInfoBlock type="Bool" default_value="1" />

Use schema from cache for URL with last modification time validation (for URLs with Last-Modified header)

<h2 id="schema_inference_use_cache_for_azure">
  schema\_inference\_use\_cache\_for\_azure
</h2>

<SettingsInfoBlock type="Bool" default_value="1" />

Use cache in schema inference while using azure table functio

<h2 id="schema_inference_use_cache_for_file">
  schema\_inference\_use\_cache\_for\_file
</h2>

<SettingsInfoBlock type="Bool" default_value="1" />

Use cache in schema inference while using file table functio

<h2 id="schema_inference_use_cache_for_hdfs">
  schema\_inference\_use\_cache\_for\_hdfs
</h2>

<SettingsInfoBlock type="Bool" default_value="1" />

Use cache in schema inference while using hdfs table functio

<h2 id="schema_inference_use_cache_for_s3">
  schema\_inference\_use\_cache\_for\_s3
</h2>

<SettingsInfoBlock type="Bool" default_value="1" />

Use cache in schema inference while using s3 table functio

<h2 id="schema_inference_use_cache_for_url">
  schema\_inference\_use\_cache\_for\_url
</h2>

<SettingsInfoBlock type="Bool" default_value="1" />

Use cache in schema inference while using url table functio