37 lines
1.3 KiB
Markdown
37 lines
1.3 KiB
Markdown
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# DatabaseColumnSize
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Gets a field size in bytes.
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```
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int DatabaseColumnSize(
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int request, // request handle received in DatabasePrepare
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int column // field index in the request
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);
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```
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Parameters
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request
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[in] Request handle received in [DatabasePrepare()](/en/docs/database/databaseprepare).
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column
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[in] Field index in the request. Field numbering starts from zero and cannot exceed [DatabaseColumnsCount()](/en/docs/database/databasecolumnscount) - 1.
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Return Value
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If successful, the field size in bytes is returned, otherwise -1. To get the error code, use GetLastError(), the possible responses are:
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- ERR_DATABASE_INVALID_HANDLE (5121) – invalid request handle;
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- ERR_DATABASE_NO_MORE_DATA (5126) – 'column' index exceeds DatabaseColumnsCount() -1.
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Note
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The value can be obtained only if at least one [DatabaseRead()](/en/docs/database/databaseread) call has been preliminarily made for 'request'.
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See also
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[DatabasePrepare](/en/docs/database/databaseprepare), [DatabaseColumnBlob](/en/docs/database/databasecolumnblob), [DatabaseColumnsCount](/en/docs/database/databasecolumnscount), [DatabaseColumnName](/en/docs/database/databasecolumnname), [DatabaseColumnType](/en/docs/database/databasecolumntype)
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