Oracle Purchasing- PO Match Approval Level column store

In Oracle Purchasing Match options column store in INSPECTION_REQUIRED_FLAG and RECEIPT_REQUIRED_FLAG fields of table PO_LINE_LOCATIONS_ALL.

2-way matching 
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INSPECTION_REQUIRED_FLAG = 'N' and RECEIPT_REQUIRED_FLAG = 'N'

3-way matching 
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INSPECTION_REQUIRED_FLAG = 'N' and RECEIPT_REQUIRED_FLAG = 'Y' 

4-way matching 
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INSPECTION_REQUIRED_FLAG = 'Y' and RECEIPT_REQUIRED_FLAG = 'Y' 

MATCH_OPTION fields

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P Match to Purchase Order 
R Match to Receipt