protected override void DeparseDerivedTableNode(ScriptWriter writer, IQsiDerivedTableNode node, QsiScript script)
{
base.DeparseDerivedTableNode(writer, node, script);
if (node is not MySqlDerivedTableNode mysqlNode)
{
return;
}
if (!mysqlNode.ProcedureAnalyse.IsEmpty)
{
var procedureAnalyse = mysqlNode.ProcedureAnalyse.Value;
writer.WriteSpace();
writer.Write("PROCEDURE ANALYSE (");
writer.Write(procedureAnalyse.MaxElements);
if (procedureAnalyse.MaxMemory.HasValue)
{
writer.Write(", ");
writer.Write(procedureAnalyse.MaxMemory.Value);
}
writer.Write(')');
}
if (mysqlNode.Lockings?.Count > 0)
{
writer.WriteSpace();
writer.WriteJoin(" ", mysqlNode.Lockings, DeparseLockingNode);
}
}
protected bool IsAliasedDerivedTableNode(IQsiDerivedTableNode node)
{
return
(node.Source is IQsiDerivedTableNode &&
node.Alias is not null &&
node.Directives is null &&
node.Where is null &&
node.Grouping is null &&
node.Order is null &&
node.Limit is null &&
node.Columns is not null &&
IsWildcard(node.Columns));
}
protected bool IsAliasedTableAccessNode(IQsiDerivedTableNode node)
{
return
(node.Source is IQsiTableAccessNode &&
node.Alias != null &&
node.Directives == null &&
node.Where == null &&
node.Grouping == null &&
node.Order == null &&
node.Limit == null &&
node.Columns != null &&
IsWildcard(node.Columns));
}
protected virtual async ValueTask <QsiTableStructure> BuildRecursiveCompositeTableStructure(TableCompileContext context, IQsiDerivedTableNode table, IQsiCompositeTableNode source)
{
context.ThrowIfCancellationRequested();
var declaredTable = new QsiTableStructure
{
Type = QsiTableType.Derived,
Identifier = new QsiQualifiedIdentifier(table.Alias.Name)
};
int sourceOffset = 0;
var structures = new List <QsiTableStructure>(source.Sources.Length);
if (table.Columns.Any(c => c is not IQsiAllColumnNode))
{
foreach (var columnNode in table.Columns.Cast <IQsiSequentialColumnNode>())
{
var column = declaredTable.NewColumn();
column.Name = columnNode.Alias.Name;
}
}
protected virtual async ValueTask <QsiTableStructure> BuildDerivedTableStructure(TableCompileContext context, IQsiDerivedTableNode table)
{
context.ThrowIfCancellationRequested();
using var scopedContext = new TableCompileContext(context);
// Directives
if (table.Directives?.Tables?.Length > 0)
{
await BuildDirectives(scopedContext, table.Directives);
}
// Table Source
var alias = table.Alias?.Name;
if (alias == null &&
table.Parent is IQsiDerivedColumnNode &&
!context.Options.AllowNoAliasInDerivedTable)
{
throw new QsiException(QsiError.NoAlias);
}
if (table.Source is IQsiJoinedTableNode joinedTableNode)
{
scopedContext.SourceTable = await BuildJoinedTableStructure(scopedContext, joinedTableNode);
}
else if (table.Source != null)
{
using var sourceContext = new TableCompileContext(scopedContext);
scopedContext.SourceTable = await BuildTableStructure(scopedContext, table.Source);
}
var declaredTable = new QsiTableStructure
{
Type = QsiTableType.Derived,
Identifier = alias == null ? null : new QsiQualifiedIdentifier(alias)
};
if (scopedContext.SourceTable != null)
{
declaredTable.References.Add(scopedContext.SourceTable);
}
var columns = table.Columns;
if (columns == null || columns.Count == 0)
{
if (!context.Options.AllowEmptyColumnsInSelect)
{
throw new QsiException(QsiError.Syntax);
}
}
else if (columns.TryCast(out IQsiSequentialColumnNode[] sequentialColumns))
{
// Sequential columns definition
if (scopedContext.SourceTable == null)
{
throw new QsiException(QsiError.NoTablesUsed);
}
var columnType = sequentialColumns[0].ColumnType;
QsiTableColumn[] allColumns = scopedContext.SourceTable.VisibleColumns.ToArray();
int columnLength = allColumns.Length;
if (sequentialColumns.Length > allColumns.Length)
{
throw new QsiException(QsiError.SpecifiesMoreColumnNames);
}
if (columnType == QsiSequentialColumnType.Default)
{
if (sequentialColumns.Length != allColumns.Length)
{
throw new QsiException(QsiError.DifferentColumnsCount);
}
columnLength = sequentialColumns.Length;
}
for (int i = 0; i < columnLength; i++)
{
var column = allColumns[i];
var declaredColumn = declaredTable.NewColumn();
declaredColumn.Name = i < sequentialColumns.Length ? sequentialColumns[i].Alias?.Name : column.Name;
declaredColumn.References.Add(column);
}
}
else
{
// Compund columns definition
foreach (var column in columns)
{
IEnumerable <QsiTableColumn> resolvedColumns = ResolveColumns(scopedContext, column);
switch (column)
{
case IQsiDerivedColumnNode derivedColum:
{
var declaredColumn = declaredTable.NewColumn();
declaredColumn.Name = derivedColum.Alias?.Name;
declaredColumn.IsExpression = derivedColum.IsExpression;
declaredColumn.References.AddRange(resolvedColumns);
break;
}
case IQsiBindingColumnNode bindingColumn:
{
var declaredColumn = declaredTable.NewColumn();
declaredColumn.Name = new QsiIdentifier(bindingColumn.Id, false);
declaredColumn.IsBinding = true;
break;
}
default:
{
foreach (var c in resolvedColumns)
{
var declaredColumn = declaredTable.NewColumn();
declaredColumn.Name = c.Name;
declaredColumn.References.Add(c);
}
break;
}
}
}
}
return(declaredTable);
}
protected virtual QsiIdentifier ResolveDerivedColumnName(TableCompileContext context, IQsiDerivedTableNode table, IQsiDerivedColumnNode column)
{
return(column.Alias?.Name ?? column.InferredName);
}
protected virtual QsiIdentifier ResolveCompoundColumnName(TableCompileContext context, IQsiDerivedTableNode table, IQsiColumnNode column, QsiTableColumn refColumn)
{
return(refColumn.Name);
}
protected override ValueTask <QsiTableStructure> BuildDerivedTableStructure(TableCompileContext context, IQsiDerivedTableNode table)
{
if (table.Source == null)
{
throw new QsiException(QsiError.NoFromClause);
}
return(base.BuildDerivedTableStructure(context, table));
}
protected override async ValueTask <QsiTableStructure> BuildDerivedTableStructure(TableCompileContext context, IQsiDerivedTableNode table)
{
var structure = await base.BuildDerivedTableStructure(context, table);
if (table is IDynamicTableNode dynamicTableNode)
{
PatchDynamicTable(structure, dynamicTableNode);
}
return(structure);
}
protected override void DeparseDerivedTableNode(ScriptWriter writer, IQsiDerivedTableNode node, QsiScript script)
{
if (node is CqlDerivedTableNode cqlNode)
{
writer.Write("SELECT ");
if (cqlNode.IsJson)
{
writer.Write("JSON ");
}
if (cqlNode.IsDistinct)
{
writer.Write("DISTINCT ");
}
if (node.Columns != null)
{
DeparseTreeNode(writer, node.Columns, script);
}
writer.WriteSpace();
writer.Write("FROM ");
DeparseTreeNode(writer, node.Source, script);
if (node.Where != null)
{
writer.WriteSpace();
DeparseTreeNode(writer, node.Where, script);
}
if (node.Grouping != null)
{
writer.WriteSpace();
DeparseTreeNode(writer, node.Grouping, script);
}
if (node.Order != null)
{
writer.WriteSpace();
DeparseTreeNode(writer, node.Order, script);
}
if (!cqlNode.PerPartitionLimit.IsEmpty)
{
writer.WriteSpace();
writer.Write("PER PARTITION LIMIT ");
DeparseTreeNode(writer, cqlNode.PerPartitionLimit.Value, script);
}
if (node.Limit != null)
{
writer.WriteSpace();
DeparseTreeNode(writer, node.Limit, script);
}
if (cqlNode.AllowFiltering)
{
writer.WriteSpace();
writer.Write("ALLOW FILTERING");
}
return;
}
base.DeparseDerivedTableNode(writer, node, script);
}
protected override QsiIdentifier ResolveDerivedColumnName(TableCompileContext context, IQsiDerivedTableNode table, IQsiDerivedColumnNode column)
{
if (column.IsExpression && column.Alias is null)
{
var expr = column.Expression;
var parensCount = 0;
while (expr is IQsiMultipleExpressionNode multipleExpr && multipleExpr.Elements.Length == 1)
{
expr = multipleExpr.Elements[0];
parensCount++;
}
bool withParens = true;
var parent = table.Parent;
while (parent is not null)
{
if (parent is IQsiDerivedTableNode)
{
withParens = false;
break;
}
parent = parent.Parent;
}
if (expr is IQsiColumnExpressionNode {
Column : IQsiColumnReferenceNode columnReferenceNode
})