public override SqlExpression Accept(SqlExpressionVisitor visitor)
{
return(visitor.VisitQuery(this));
}
public ExpressionParseResult ParseExpression(string text)
{
SetInput(text);
//var plSqlParser = MakeParser(text, null);
var parseResult = plSqlParser.expressionUnit();
var visitor = new SqlExpressionVisitor();
var result = visitor.Visit(parseResult);
var errors = messages.Where(x => x.Level == CompileMessageLevel.Error).Select(x => x.Text).ToArray();
if (errors.Length > 0)
return new ExpressionParseResult(errors);
return new ExpressionParseResult(result);
}
public override SqlExpression Accept(SqlExpressionVisitor visitor)
{
return(visitor.VisitConstant(this));
}
public override SqlExpression Accept(SqlExpressionVisitor visitor)
{
return(visitor.VisitParameter(this));
}
/// <summary>
/// Accepts the visit of a SQL visitor
/// </summary>
/// <param name="visitor">The <see cref="SqlExpressionVisitor"/> that is visiting
/// the expression.</param>
/// <returns>
/// Returns an instance of <see cref="SqlExpression"/> resulting from the visit
/// of the given <see cref="SqlExpressionVisitor"/>.
/// </returns>
/// <seealso cref="SqlExpressionVisitor.Visit"/>
public virtual SqlExpression Accept(SqlExpressionVisitor visitor)
{
return(visitor.Visit(this));
}
public override SqlExpression Accept(SqlExpressionVisitor visitor)
{
return(visitor.VisitVariable(this));
}
public override SqlExpression Accept(SqlExpressionVisitor visitor)
{
return(visitor.VisitReference(this));
}
public virtual SqlExpression Accept(SqlExpressionVisitor visitor)
{
return visitor.Visit(this);
}
public override SqlExpression Accept(SqlExpressionVisitor visitor)
{
return(visitor.VisitStringMatch(this));
}
private static JoinNode FormJoinNode(PlSqlParser.JoinClauseContext context)
{
JoinType joinType;
if (context.INNER() != null) {
joinType = JoinType.Inner;
} else if (context.outerJoinType() != null) {
if (context.outerJoinType().FULL() != null) {
joinType = JoinType.Full;
} else if (context.outerJoinType().LEFT() != null) {
joinType = JoinType.Left;
} else if (context.outerJoinType().RIGHT() != null) {
joinType = JoinType.Right;
} else {
throw new ParseCanceledException("Invalid outer join type");
}
} else {
throw new ParseCanceledException("Invalid join type");
}
var onPart = context.joinOnPart();
if (onPart.IsEmpty)
throw new ParseCanceledException("None ON expression found in JOIN clause");
var onExp = new SqlExpressionVisitor().Visit(onPart.condition());
var source = FormSource(context.dml_table_expression_clause());
return new JoinNode {
JoinType = joinType,
OnExpression = onExp,
Source = source
};
}
