public override void EnterFrom(SelectSQLParser.FromContext context)
{
var table = context.table();
var tableLockType = context.tableLockType();
if (table == null || table.IsEmpty)
{
throw new MissingTableNameException();
}
var tableName = table.GetText();
if (string.IsNullOrEmpty(tableName))
{
throw new MissingTableNameException();
}
TableReadType readType = TableReadType.NONE;
if (tableLockType != null && !tableLockType.IsEmpty)
{
var nolockOption = tableLockType.NOLOCK();
var readpastOption = tableLockType.READPAST();
if (nolockOption != null)
{
readType = TableReadType.NOLOCK;
}
else if (readpastOption != null)
{
readType = TableReadType.READPAST;
}
}
this.SelectStmt.TableDescriptor = new TableDescriptor()
{
TableName = tableName, TableReadType = readType
};
}
/// <summary>
/// Visit a parse tree produced by <see cref="SelectSQLParser.from"/>.
/// <para>
/// The default implementation returns the result of calling <see cref="AbstractParseTreeVisitor{Result}.VisitChildren(IRuleNode)"/>
/// on <paramref name="context"/>.
/// </para>
/// </summary>
/// <param name="context">The parse tree.</param>
/// <return>The visitor result.</return>
public virtual Result VisitFrom([NotNull] SelectSQLParser.FromContext context)
{
return(VisitChildren(context));
}
/// <summary>
/// Exit a parse tree produced by <see cref="SelectSQLParser.from"/>.
/// <para>The default implementation does nothing.</para>
/// </summary>
/// <param name="context">The parse tree.</param>
public virtual void ExitFrom([NotNull] SelectSQLParser.FromContext context)
{
}