private void StringifySqlAst(Node?parent, Node node, IReadOnlyCollection <string> prefix,
IResolveFieldContext context, ICollection <string> selections, ICollection <string> tables,
ICollection <WhereCondition> wheres, ICollection <string> orders, IEnumerable batchScope,
SqlCompilerContext compilerContext)
{
switch (node)
{
case SqlTable sqlTable:
HandleTable(parent, sqlTable, prefix, context, selections, tables, wheres, orders, batchScope, compilerContext);
if (ThisIsNotTheEndOfThisBatch(parent, sqlTable))
{
foreach (var child in sqlTable.Children)
{
StringifySqlAst(node, child, new List <string>(prefix)
{
sqlTable.As
}, context, selections,
tables, wheres, orders, batchScope, compilerContext);
}
}
break;
case SqlColumn sqlColumn:
{
if (!(parent is SqlTable table))
{
throw new ArgumentException($"'{nameof(parent)}' must be of type {typeof(SqlTable)}",
nameof(parent));
}
var parentTable = table.As;
string columnName;
if (sqlColumn.Expression != null)
{
columnName = sqlColumn.Expression(_dialect.Quote(parentTable), sqlColumn.Arguments, context, table);
}
else if (table.ColumnExpression != null)
{
columnName = table.ColumnExpression(_dialect.Quote(parentTable), sqlColumn.Name, sqlColumn.Arguments, context);
}
else
{
columnName = $"{_dialect.Quote(parentTable)}.{_dialect.Quote(sqlColumn.Name)}";
}
selections.Add($"{columnName} AS {_dialect.Quote(JoinPrefix(prefix) + sqlColumn.As)}");
break;
}
case SqlComposite sqlComposite:
{
if (!(parent is SqlTable table))
{
throw new ArgumentException($"'{nameof(parent)}' must be of type {typeof(SqlTable)}", nameof(parent));
}
var parentTable = table.As;
selections.Add($"{_dialect.CompositeKey(parentTable, sqlComposite.Name)} AS {_dialect.Quote(JoinPrefix(prefix) + sqlComposite.As)}");
break;
}
case SqlJunction _:
case SqlNoop _:
break;
default:
throw new ArgumentOutOfRangeException(nameof(node), $"Don't know how to handle {node.GetType()}.");
}
}
