ऐसा लगता है कि यह अभी तक mysql ड्राइवर द्वारा समर्थित नहीं हो सकता है। डीबग के माध्यम से त्वरित जांच करने पर, ऐसा लगता है कि निम्न sql कथन दर्ज हो गया है:
SELECT NULL AS PKTABLE_CAT,
A.REFERENCED_TABLE_SCHEMA AS PKTABLE_SCHEM,
A.REFERENCED_TABLE_NAME AS PKTABLE_NAME,
A.REFERENCED_COLUMN_NAME AS PKCOLUMN_NAME,
A.TABLE_CATALOG AS FKTABLE_CAT,
A.TABLE_SCHEMA AS FKTABLE_SCHEM,
A.TABLE_NAME AS FKTABLE_NAME,
A.COLUMN_NAME AS FKCOLUMN_NAME,
A.ORDINAL_POSITION AS KEY_SEQ,
NULL AS UPDATE_RULE,
NULL AS DELETE_RULE,
A.CONSTRAINT_NAME AS FK_NAME,
NULL AS PK_NAME,
NULL AS DEFERABILITY,
NULL AS UNIQUE_OR_PRIMARY
FROM INFORMATION_SCHEMA.KEY_COLUMN_USAGE A,
INFORMATION_SCHEMA.TABLE_CONSTRAINTS B
WHERE A.TABLE_SCHEMA = B.TABLE_SCHEMA AND A.TABLE_NAME = B.TABLE_NAME
AND A.CONSTRAINT_NAME = B.CONSTRAINT_NAME AND B.CONSTRAINT_TYPE IS NOT NULL
AND A.TABLE_NAME = ? ORDER BY A.TABLE_SCHEMA, A.TABLE_NAME, A.ORDINAL_POSITION
ध्यान दें कि UPDATE_RULE और DELETE_RULE दोनों कॉलम NULL पर सेट हैं।
