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Overview
| Comment: | Add to the foreign_key_check pragma an extra output column "parent" that contains the name of the parent table for the constraint that failed. |
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| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | foreign-key-check |
| Files: | files | file ages | folders |
| SHA1: | 97f7f7377259ecf562019f62ebed0897cfae236e |
| User & Date: | drh 2012-12-17 20:57:15 |
Context
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2012-12-17
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| 22:32 | Added test cases for PRAGMA foreign_key_check. Fixed a bug that appears when the column order of the child and parent differ. check-in: 25411f83 user: drh tags: foreign-key-check | |
| 20:57 | Add to the foreign_key_check pragma an extra output column "parent" that contains the name of the parent table for the constraint that failed. check-in: 97f7f737 user: drh tags: foreign-key-check | |
| 20:40 | Enhance the error message for "foreign key mismatch" to include the names of the child and parent tables. Begin adding test cases for PRAGMA foreign_key_check. Make sure PRAGMA foreign_key_check gets all necessary table locks. check-in: 0f996352 user: drh tags: foreign-key-check | |
Changes
Changes to src/pragma.c.
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int regKey; /* Register to hold key for checking the FK */
int regRow; /* Registers to hold a row from pTab */
int addrTop; /* Top of a loop checking foreign keys */
int addrOk; /* Jump here if the key is OK */
if( sqlite3ReadSchema(pParse) ) goto pragma_out;
regResult = pParse->nMem+1;
pParse->nMem += 3;
regKey = ++pParse->nMem;
regRow = ++pParse->nMem;
v = sqlite3GetVdbe(pParse);
sqlite3VdbeSetNumCols(v, 3);
sqlite3VdbeSetColName(v, 0, COLNAME_NAME, "table", SQLITE_STATIC);
sqlite3VdbeSetColName(v, 1, COLNAME_NAME, "rowid", SQLITE_STATIC);
sqlite3VdbeSetColName(v, 2, COLNAME_NAME, "fkid", SQLITE_STATIC);
sqlite3CodeVerifySchema(pParse, iDb);
k = sqliteHashFirst(&db->aDb[iDb].pSchema->tblHash);
while( k ){
if( zRight ){
pTab = sqlite3LocateTable(pParse, 0, zRight, zDb);
k = 0;
}else{
................................................................................
}
sqlite3VdbeAddOp3(v, OP_MakeRecord, regRow, pFK->nCol, regKey);
sqlite3VdbeChangeP4(v, -1,
sqlite3IndexAffinityStr(v,pIdx), P4_TRANSIENT);
sqlite3VdbeAddOp4Int(v, OP_Found, i, addrOk, regKey, 0);
}
sqlite3VdbeAddOp2(v, OP_Rowid, 0, regResult+1);
sqlite3VdbeAddOp2(v, OP_Integer, i-1, regResult+2);
sqlite3VdbeAddOp2(v, OP_ResultRow, regResult, 3);
sqlite3VdbeResolveLabel(v, addrOk);
}
sqlite3VdbeAddOp2(v, OP_Next, 0, addrTop+1);
sqlite3VdbeJumpHere(v, addrTop);
}
}else
#endif /* !defined(SQLITE_OMIT_FOREIGN_KEY) */
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int regKey; /* Register to hold key for checking the FK */
int regRow; /* Registers to hold a row from pTab */
int addrTop; /* Top of a loop checking foreign keys */
int addrOk; /* Jump here if the key is OK */
if( sqlite3ReadSchema(pParse) ) goto pragma_out;
regResult = pParse->nMem+1;
pParse->nMem += 4;
regKey = ++pParse->nMem;
regRow = ++pParse->nMem;
v = sqlite3GetVdbe(pParse);
sqlite3VdbeSetNumCols(v, 4);
sqlite3VdbeSetColName(v, 0, COLNAME_NAME, "table", SQLITE_STATIC);
sqlite3VdbeSetColName(v, 1, COLNAME_NAME, "rowid", SQLITE_STATIC);
sqlite3VdbeSetColName(v, 2, COLNAME_NAME, "parent", SQLITE_STATIC);
sqlite3VdbeSetColName(v, 3, COLNAME_NAME, "fkid", SQLITE_STATIC);
sqlite3CodeVerifySchema(pParse, iDb);
k = sqliteHashFirst(&db->aDb[iDb].pSchema->tblHash);
while( k ){
if( zRight ){
pTab = sqlite3LocateTable(pParse, 0, zRight, zDb);
k = 0;
}else{
................................................................................
}
sqlite3VdbeAddOp3(v, OP_MakeRecord, regRow, pFK->nCol, regKey);
sqlite3VdbeChangeP4(v, -1,
sqlite3IndexAffinityStr(v,pIdx), P4_TRANSIENT);
sqlite3VdbeAddOp4Int(v, OP_Found, i, addrOk, regKey, 0);
}
sqlite3VdbeAddOp2(v, OP_Rowid, 0, regResult+1);
sqlite3VdbeAddOp4(v, OP_String8, 0, regResult+2, 0,
pFK->zTo, P4_TRANSIENT);
sqlite3VdbeAddOp2(v, OP_Integer, i-1, regResult+3);
sqlite3VdbeAddOp2(v, OP_ResultRow, regResult, 4);
sqlite3VdbeResolveLabel(v, addrOk);
}
sqlite3VdbeAddOp2(v, OP_Next, 0, addrTop+1);
sqlite3VdbeJumpHere(v, addrTop);
}
}else
#endif /* !defined(SQLITE_OMIT_FOREIGN_KEY) */
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Changes to test/fkey_malloc.test.
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CREATE TABLE t1(a PRIMARY KEY, b UNIQUE);
CREATE TABLE t2(x REFERENCES t1 ON UPDATE CASCADE ON DELETE CASCADE);
} -sqlbody {
INSERT INTO t1 VALUES('aaa', 1);
INSERT INTO t2 VALUES('aaa');
UPDATE t1 SET a = 'bbb';
DELETE FROM t1;
}
do_malloc_test fkey_malloc-2 -sqlprep {
PRAGMA foreign_keys = 1;
CREATE TABLE t1(a, b, UNIQUE(a, b));
} -sqlbody {
CREATE TABLE t2(x, y,
................................................................................
CREATE TABLE z(e, f, FOREIGN KEY(e, f) REFERENCES x);
} -sqlbody {
DROP TABLE y;
DROP TABLE x;
}
finish_test
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CREATE TABLE t1(a PRIMARY KEY, b UNIQUE);
CREATE TABLE t2(x REFERENCES t1 ON UPDATE CASCADE ON DELETE CASCADE);
} -sqlbody {
INSERT INTO t1 VALUES('aaa', 1);
INSERT INTO t2 VALUES('aaa');
UPDATE t1 SET a = 'bbb';
DELETE FROM t1;
PRAGMA foreign_key_check;
}
do_malloc_test fkey_malloc-2 -sqlprep {
PRAGMA foreign_keys = 1;
CREATE TABLE t1(a, b, UNIQUE(a, b));
} -sqlbody {
CREATE TABLE t2(x, y,
................................................................................
CREATE TABLE z(e, f, FOREIGN KEY(e, f) REFERENCES x);
} -sqlbody {
DROP TABLE y;
DROP TABLE x;
}
finish_test
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