# Check Column Existence

Checks for the existence of a column in a table.

<table data-header-hidden><thead><tr><th width="246" valign="top"></th><th width="297" valign="top"></th></tr></thead><tbody><tr><td valign="top">Table</td><td valign="top">[Data Table] The data table in which the column is checked.</td></tr><tr><td valign="top">Column Name</td><td valign="top">[Text] The name of the column.</td></tr><tr><td valign="top">Case Sensitive</td><td valign="top">If this property is enabled, the case of characters will be considered during the check; otherwise, it will be ignored.</td></tr><tr><td valign="top">Check Type</td><td valign="top"><p>Select the type of check.</p><p>Possible values:</p><ul><li>"Include" - the column must be present in the table;</li><li>"Exclude" - the column must not be present in the table.</li></ul></td></tr><tr><td valign="top">Column Number</td><td valign="top">[Number] The number of the found column</td></tr><tr><td valign="top">Error Handling Level</td><td valign="top"><p>Select the error handling level. Possible values:</p><ul><li>"Default" - by default;</li><li>"Ignore" - errors are ignored;</li><li>"Handle" - errors are handled.</li></ul><p>If "Default" is selected, the value from the "Start" block of this diagram will be used.</p></td></tr><tr><td valign="top">Error Output Direction</td><td valign="top"><p>Select the output direction from the block when an error occurs. Possible values:</p><ul><li>"Default" - by default;</li><li>"Right" - to the right;</li><li>"Bottom" - down.</li></ul><p>This property allows you to determine the output direction when errors occur for blocks that do not contain the "If Error" connector (e.g., the "Condition" block).</p><p>If "Default" is selected, the value from the "Start" block of this diagram will be used.</p></td></tr><tr><td valign="top">Message Level</td><td valign="top"><p>Select the message level that the blocks will output during operation. Possible values:</p><ul><li>"Default" - by default;</li><li>"Release" - output is disabled;</li><li>"Debug" - main information output;</li><li>"Detailed" - detailed information output.</li></ul><p>If "Default" is selected, the value from the "Start" block of this diagram will be used.</p></td></tr><tr><td valign="top">Error Message</td><td valign="top">[Text] Returns detailed information about the error in case of incorrect execution of the block's work.</td></tr></tbody></table>


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