The maximum number of rows to scan to look for the columns available in a table.

データ型

int

デフォルト値

100

解説

The columns in a table must be determined by scanning table rows. This value determines the maximum number of rows that will be scanned.

Setting a high value may decrease performance. Setting a low value may prevent the data type from being determined properly, especially when there is null data.

Setting to a value of -1 causes the connector to scan an arbitrary number of rows until it reaches the final row.