private void SetupSystem()
{
using (var transaction = Database.CreateSafeTransaction(IsolationLevel.Serializable)) {
try {
using (var session = new SystemSession(transaction, SystemSchema.Name)) {
using (var query = session.CreateQuery()) {
foreach (var feature in Database.System.Features)
{
try {
feature.OnSystemEvent(SystemEventType.TableCompositeSetup, query);
} catch (Exception ex) {
query.Context.OnError(
new Exception(
String.Format("The feature {0} (v{1}) caused an error on Composite-Setup event.", feature.FeatureName,
feature.Version), ex));
throw;
}
}
}
}
// Commit and close the transaction.
transaction.Commit();
} catch (TransactionException e) {
throw new InvalidOperationException("Transaction Exception initializing the system.", e);
}
}
}
private void CreateSystem()
{
// Create the transaction
using (var transaction = Database.CreateSafeTransaction(IsolationLevel.Serializable)) {
try {
using (var session = new SystemSession(transaction, SystemSchema.Name)) {
using (var query = session.CreateQuery()) {
foreach (var feature in Database.System.Features)
{
feature.OnSystemEvent(SystemEventType.TableCompositeCreate, query);
}
}
}
// Commit and close the transaction.
transaction.Commit();
} catch (TransactionException e) {
throw new InvalidOperationException("Transaction Exception creating composite.", e);
}
}
}
private ITable FindEntry(Table table, ObjectName routineName)
{
var schemav = table.GetResolvedColumnName(0);
var namev = table.GetResolvedColumnName(1);
using (var session = new SystemSession(transaction)) {
using (var context = session.CreateQuery()) {
var t = table.SimpleSelect(context, namev, SqlExpressionType.Equal,
SqlExpression.Constant(DataObject.String(routineName.Name)));
t = t.ExhaustiveSelect(context,
SqlExpression.Equal(SqlExpression.Reference(schemav),
SqlExpression.Constant(DataObject.String(routineName.ParentName))));
// This should be at most 1 row in size
if (t.RowCount > 1)
throw new Exception("Assert failed: multiple procedure names for " + routineName);
// Return the entries found.
return t;
}
}
}
public static void CheckAddConstraintViolations(this ITransaction transaction, ITable table, int[] rowIndices,
ConstraintDeferrability deferred)
{
string curSchema = table.TableInfo.TableName.Parent.Name;
using (var session = new SystemSession(transaction, curSchema)) {
using (var queryContext = session.CreateQuery()) {
// Quick exit case
if (rowIndices == null || rowIndices.Length == 0)
return;
var tableInfo = table.TableInfo;
var tableName = tableInfo.TableName;
// ---- Constraint checking ----
// Check any primary key constraint.
var primaryKey = transaction.QueryTablePrimaryKey(tableName);
if (primaryKey != null &&
(deferred == ConstraintDeferrability.InitiallyDeferred ||
primaryKey.Deferred == ConstraintDeferrability.InitiallyImmediate)) {
// For each row added to this column
foreach (int rowIndex in rowIndices) {
if (!IsUniqueColumns(table, rowIndex, primaryKey.ColumnNames, false)) {
throw new PrimaryKeyViolationException(tableName, primaryKey.ConstraintName, primaryKey.ColumnNames, deferred);
}
} // For each row being added
}
// Check any unique constraints.
var uniqueConstraints = transaction.QueryTableUniqueKeys(tableName);
foreach (var unique in uniqueConstraints) {
if (deferred == ConstraintDeferrability.InitiallyDeferred ||
unique.Deferred == ConstraintDeferrability.InitiallyImmediate) {
// For each row added to this column
foreach (int rowIndex in rowIndices) {
if (!IsUniqueColumns(table, rowIndex, unique.ColumnNames, true)) {
throw new UniqueKeyViolationException(tableName, unique.ConstraintName, unique.ColumnNames, deferred);
}
} // For each row being added
}
}
// Check any foreign key constraints.
// This ensures all foreign references in the table are referenced
// to valid records.
var foreignConstraints = transaction.QueryTableForeignKeys(tableName);
foreach (var reference in foreignConstraints) {
if (deferred == ConstraintDeferrability.InitiallyDeferred ||
reference.Deferred == ConstraintDeferrability.InitiallyImmediate) {
// For each row added to this column
foreach (int rowIndex in rowIndices) {
// Make sure the referenced record exists
// Return the count of records where the given row of
// table_name(columns, ...) IN
// ref_table_name(ref_columns, ...)
int rowCount = RowCountOfReferenceTable(transaction,
rowIndex,
reference.TableName, reference.ColumnNames,
reference.ForeignTable, reference.ForeignColumnNames,
false);
if (rowCount == -1) {
// foreign key is NULL
}
if (rowCount == 0) {
throw new ForeignKeyViolationException(tableName, reference.ConstraintName, reference.ColumnNames,
reference.ForeignTable, reference.ForeignColumnNames, deferred);
}
} // For each row being added.
}
}
// Any general checks of the inserted data
var checkConstraints = transaction.QueryTableCheckExpressions(tableName);
// For each check constraint, check that it evaluates to true.
for (int i = 0; i < checkConstraints.Length; ++i) {
var check = checkConstraints[i];
if (deferred == ConstraintDeferrability.InitiallyDeferred ||
check.Deferred == ConstraintDeferrability.InitiallyImmediate) {
var exp = tableInfo.ResolveColumns(transaction.IgnoreIdentifiersCase(), check.CheckExpression);
// For each row being added to this column
for (int rn = 0; rn < rowIndices.Length; ++rn) {
var resolver = new TableRowVariableResolver(table, rowIndices[rn]);
var evalExp = exp.Evaluate(queryContext, resolver, null);
var ob = ((SqlConstantExpression) evalExp).Value;
var b = ob.AsBoolean();
if (!b.IsNull) {
if (!((SqlBoolean)b.Value)) {
// Evaluated to false so don't allow this row to be added.
throw new CheckViolationException(tableName, check.ConstraintName, check.CheckExpression, deferred);
}
} else {
// NOTE: This error will pass the row by default
// TODO: emit a warning
}
}
}
}
}
}
}
private void SetupSystem()
{
using (var transaction = Database.CreateSafeTransaction(IsolationLevel.Serializable)) {
try {
using (var session = new SystemSession(transaction, SystemSchema.Name)) {
using (var query = session.CreateQuery()) {
foreach (var feature in Database.System.Features) {
try {
feature.OnSystemEvent(SystemEventType.TableCompositeSetup, query);
} catch (Exception ex) {
query.Context.OnError(
new Exception(
String.Format("The feature {0} (v{1}) caused an error on Composite-Setup event.", feature.FeatureName,
feature.Version), ex));
throw;
}
}
}
}
// Commit and close the transaction.
transaction.Commit();
} catch (TransactionException e) {
throw new InvalidOperationException("Transaction Exception initializing the system.", e);
}
}
}
private void CreateSystem()
{
// Create the transaction
using (var transaction = Database.CreateSafeTransaction(IsolationLevel.Serializable)) {
try {
using (var session = new SystemSession(transaction, SystemSchema.Name)) {
using (var query = session.CreateQuery()) {
foreach (var feature in Database.System.Features) {
feature.OnSystemEvent(SystemEventType.TableCompositeCreate, query);
}
}
}
// Commit and close the transaction.
transaction.Commit();
} catch (TransactionException e) {
throw new InvalidOperationException("Transaction Exception creating composite.", e);
}
}
}
