public bool VisitExprInsertQuery(ExprInsertQuery expr, TCtx arg)
{
var res = this.Visit(expr, "InsertQuery", arg, out var argOut) && this.Accept("Query", expr.Query, argOut);
this._visitor.EndVisitExpr(expr, arg);
return(res);
}
public static ExprInsertQuery WithQuery(this ExprInsertQuery original, IExprQuery newQuery) => new ExprInsertQuery(query: newQuery);
public ExprInsert Done()
{
var checkExistence = this._checkExistenceByColumns != null && this._checkExistenceByColumns.Count > 0;
var useDerivedTable = this._targetInsertSelectMapping != null || checkExistence;
var mapping = this._dataMapping.AssertFatalNotNull(nameof(this._dataMapping));
int?capacity = this._data.TryToCheckLength(out var c) ? c : (int?)null;
if (capacity != null && capacity.Value < 1)
{
throw new SqExpressException("Input data should not be empty");
}
List <ExprValueRow>? recordsS = null;
List <ExprInsertValueRow>?recordsI = null;
if (useDerivedTable)
{
recordsS = capacity.HasValue ? new List <ExprValueRow>(capacity.Value) : new List <ExprValueRow>();
}
else
{
recordsI = capacity.HasValue ? new List <ExprInsertValueRow>(capacity.Value) : new List <ExprInsertValueRow>();
}
DataMapSetter <TTable, TItem>? dataMapSetter = null;
IReadOnlyList <ExprColumnName>?columns = null;
foreach (var item in this._data)
{
dataMapSetter ??= new DataMapSetter <TTable, TItem>(this._target, item);
dataMapSetter.NextItem(item, columns?.Count);
mapping(dataMapSetter);
columns ??= dataMapSetter.Columns;
dataMapSetter.EnsureRecordLength();
recordsS?.Add(new ExprValueRow(dataMapSetter.Record.AssertFatalNotNull(nameof(dataMapSetter.Record))));
recordsI?.Add(new ExprInsertValueRow(dataMapSetter.Record.AssertFatalNotNull(nameof(dataMapSetter.Record))));
}
if ((recordsS?.Count ?? 0 + recordsI?.Count ?? 0) < 1 || columns == null)
{
//In case of empty IEnumerable
throw new SqExpressException("Input data should not be empty");
}
IExprInsertSource insertSource;
if (recordsI != null)
{
insertSource = new ExprInsertValues(recordsI);
}
else if (recordsS != null && useDerivedTable)
{
var valuesConstructor = new ExprTableValueConstructor(recordsS);
var values = new ExprDerivedTableValues(
valuesConstructor,
new ExprTableAlias(Alias.Auto.BuildAliasExpression().AssertNotNull("Alias cannot be null")),
columns);
IReadOnlyList <ColumnValueInsertSelectMap>?additionalMaps = null;
if (this._targetInsertSelectMapping != null)
{
var targetUpdateSetter = new TargetInsertSelectSetter <TTable>(this._target);
this._targetInsertSelectMapping.Invoke(targetUpdateSetter);
additionalMaps = targetUpdateSetter.Maps;
if (additionalMaps.Count < 1)
{
throw new SqExpressException("Additional insertion cannot be null");
}
}
var selectValues = new List <IExprSelecting>(columns.Count + (additionalMaps?.Count ?? 0));
foreach (var exprColumnName in values.Columns)
{
selectValues.Add(exprColumnName);
}
if (additionalMaps != null)
{
foreach (var m in additionalMaps)
{
selectValues.Add(m.Value);
}
}
IExprQuery query;
var queryBuilder = SqQueryBuilder.Select(selectValues).From(values);
if (checkExistence && this._checkExistenceByColumns != null)
{
var tbl = this._target.WithAlias(new ExprTableAlias(Alias.Auto.BuildAliasExpression() !));
var existsFilter = !SqQueryBuilder.Exists(SqQueryBuilder
.SelectOne()
.From(tbl)
.Where(this._checkExistenceByColumns
.Select(column => column.WithSource(tbl.Alias) == column.WithSource(values.Alias))
.JoinAsAnd()));
query = queryBuilder.Where(existsFilter).Done();
}
else
{
query = queryBuilder.Done();
}
insertSource = new ExprInsertQuery(query);
if (additionalMaps != null)
{
var extraInsertCols = additionalMaps.SelectToReadOnlyList(m => m.Column);
columns = Helpers.Combine(columns, extraInsertCols);
}
}
else
{
//Actually C# should have detected that this brunch cannot be invoked
throw new SqExpressException("Fatal logic error!");
}
return(new ExprInsert(this._target.FullName, columns, insertSource));
}
public override bool VisitExprInsertQuery(ExprInsertQuery exprInsertQuery, IExpr?parent)
{
return(this.VisitExprInsertQueryCommon(exprInsertQuery, parent));
}
protected bool VisitExprInsertQueryCommon(ExprInsertQuery exprInsertQuery, IExpr?parent)
{
exprInsertQuery.Query.Accept(this, exprInsertQuery);
return(true);
}
public abstract bool VisitExprInsertQuery(ExprInsertQuery exprInsertQuery, IExpr?parent);
