internal ColumnDefNode CreateColumnDefNode()
{
var ret = new ColumnDefNode {
ColumnName = this.ColumnName, ColumnConstraints = new List <ColumnConstraintNode>()
};
//dialect converts DbType.Int16-64 to "INT" not "INTEGER" and only INTEGER columns can be autoincremented. This fixes that.
string correctType = this.IsIdentity ? "INTEGER" : this.DbType;
ret.TypeNameNode = SQLiteParseVisitor.ParseString <TypeNameNode>(correctType, i => i.type_name());
//not quite right but should work
if (this.IsIdentity || this.IsPrimaryKey)
{
var primKey = new PrimaryKeyConstraintNode();
if (this.IsIdentity)
{
primKey.AutoIncrement = true;
}
ret.ColumnConstraints.Add(primKey);
}
if (this.Default != null)
{
ret.ColumnConstraints.Add(new DefaultConstraintNode {
Value = DbUtils.ConvertToSqlValue(Default)
});
}
if (this.IsNotNull)
{
ret.ColumnConstraints.Add(new NotNullConstraintNode());
}
else if (this.Default == null && !this.IsPrimaryKey && !this.IsUnique)
{
ret.ColumnConstraints.Add(new DefaultConstraintNode {
Value = "NULL"
});
}
if (this.IsUnique)
{
ret.ColumnConstraints.Add(new UniqueConstraintNode());
}
return(ret);
}
public override SQLiteParseTreeNode VisitColumn_def(SQLiteParserSimpleParser.Column_defContext context)
{
var ret = new ColumnDefNode(context)
{
ColumnName = context.name().GetText()
};
var typeName = context.type_name();
if (typeName != null)
{
ret.TypeNameNode = typeName.Accept(this) as TypeNameNode;
}
ret.ColumnConstraints = context.column_constraint().Select(c => c.Accept(this)).Cast <ColumnConstraintNode>().ToList();
return(ret);
}
public StringBuilder Visit(ColumnDefNode columnDefNode)
{
var sb = new StringBuilder();
sb.Append(columnDefNode.ColumnName);
if (columnDefNode.TypeNameNode != null)
{
sb.Append(" ");
sb.Append(columnDefNode.TypeNameNode.Accept(this));
}
if (columnDefNode.ColumnConstraints != null && columnDefNode.ColumnConstraints.Any())
{
foreach (var constraint in columnDefNode.ColumnConstraints)
{
sb.Append(" ");
sb.Append(constraint.Accept(this));
}
}
return(sb);
}
public void ParsePartOfAString()
{
string parseOnlyAnArgument = "id INTEGER primary key autoincrement";
SQLiteParseTreeNode statementNodes = SQLiteParseVisitor.ParseString(parseOnlyAnArgument, i => i.column_def());
var expected = new ColumnDefNode()
{
ColumnName = "id",
ColumnConstraints = new[]
{
new PrimaryKeyConstraintNode {
AutoIncrement = true
}
},
TypeNameNode = new TypeNameNode()
{
TypeName = "INTEGER"
}
}.ToExpectedObject().AddTreeNode();
expected.ShouldMatch(statementNodes);
}
private CreateTableNode IncorporateAlterationsInCreateNode(AlterTableCommand command,
CreateTableNode createTableNode)
{
foreach (TableCommand alterCommand in command.TableCommands)
{
if (alterCommand is AddColumnCommand)
{
var addColumn = alterCommand as AddColumnCommand;
createTableNode.ColumnDefinitions.Add(addColumn.CreateColumnDefNode());
}
else if (alterCommand is DropColumnCommand)
{
var dropColumn = alterCommand as DropColumnCommand;
ColumnDefNode result =
createTableNode.ColumnDefinitions.FirstOrDefault(i => i.ColumnName == dropColumn.ColumnName);
if (result == null)
{
//bad!!
throw new InvalidColumnException <DropColumnCommand>(String.Format("Altering column {0} failed. No such column exists on table {1}.", dropColumn.ColumnName, dropColumn.TableName), dropColumn);
}
else
{
//remove our column
createTableNode.ColumnDefinitions.Remove(result);
}
}
else if (alterCommand is AlterColumnCommand)
{
var alterColumn = alterCommand as AlterColumnCommand;
ColumnDefNode columnDef =
createTableNode.ColumnDefinitions.FirstOrDefault(i => i.ColumnName == alterColumn.ColumnName);
if (columnDef == null)
{
//throw!!!!
throw new InvalidColumnException <AlterColumnCommand>(String.Format("Altering column {0} failed. No such column exists on table {1}.", alterColumn.ColumnName, alterColumn.TableName), alterColumn);
}
//modify the type name
if (!String.IsNullOrEmpty(alterColumn.DbType))
{
columnDef.TypeNameNode = SQLiteParseVisitor.ParseString <TypeNameNode>(alterColumn.DbType,
i => i.type_name());
}
if (alterColumn.Default != null)
{
//modify the default
DefaultConstraintNode defaultConstraint =
columnDef.ColumnConstraints.OfType <DefaultConstraintNode>().FirstOrDefault();
if (defaultConstraint == null)
{
//we'll create our own
defaultConstraint = new DefaultConstraintNode
{
Value = DbUtils.ConvertToSqlValue(alterColumn.Default)
};
//and add it!
columnDef.ColumnConstraints.Add(defaultConstraint);
}
else
{
//we modify the one that exists
defaultConstraint.Value = DbUtils.ConvertToSqlValue(alterColumn.Default);
}
}
}
else if (alterCommand is CreateForeignKeyCommand)
{
var foreignKeyCommand = alterCommand as CreateForeignKeyCommand;
var keyNode = new TableConstraintForeignKeyNode
{
FieldNames = foreignKeyCommand.SrcColumns,
ConstraintName = foreignKeyCommand.Name,
ForeignKeyClauseNode = new ForeignKeyClauseNode
{
TableName = foreignKeyCommand.DestTable,
FieldList = foreignKeyCommand.DestColumns,
ForeignDeferrable = new ForeignDeferrableNode().SetToTrulyDeferrable()
}
};
createTableNode.TableConstraints.Add(keyNode);
}
else if (alterCommand is DropForeignKeyCommand)
{
var foreignKeyCommand = alterCommand as DropForeignKeyCommand;
TableConstraintForeignKeyNode foreignKeyDrop = createTableNode.TableConstraints
.OfType <TableConstraintForeignKeyNode>()
.FirstOrDefault(n => n.ConstraintName == foreignKeyCommand.Name);
if (foreignKeyDrop == null)
{
throw new InvalidForeignKeyException(String.Format("No foreign key {0} exists.", foreignKeyCommand.Name), foreignKeyCommand);
}
createTableNode.TableConstraints.Remove(foreignKeyDrop);
}
}
return(createTableNode);
}
