/// <summary>
/// Build the current operation in the <see cref="QueryExecutionPlan"/> by reading the abstract syntax tree.
/// </summary>
/// <param name="scope">Scope of the current <see cref="ParseTreeNode"/>.</param>
/// <param name="node">Current <see cref="ParseTreeNode"/> in the abstract syntax tree.</param>
/// <param name="plan">The current <see cref="QueryExecutionPlan"/> being built.</param>
public void BuildOperation(Stack<string> scope, ParseTreeNode node, QueryExecutionPlan plan)
{
UpdateOperation operation;
if (node.Term.Name == this.OperationName)
{
// Update statement
operation = new UpdateOperation();
operation.TableName = node.ChildNodes[1].ChildNodes[0].Token.ValueString;
plan.Operations.Add(operation);
}
operation = (UpdateOperation) plan.Current;
if (node.Term.Name == "assignment")
{
operation.Assignments.Add(node.ChildNodes[0].ChildNodes[0].Token.ValueString, node.ChildNodes[2].Token.ValueString);
}
else if (scope.Contains("whereClauseOpt") && node.Term.Name == "binExpr")
{
// Where clause
if (node.ChildNodes[0].Term.Name == "binExpr")
{
// Handle multiple where clauses.
foreach (var child in node.ChildNodes)
{
if (child.Term.Name == "binExpr")
{
var column = child.ChildNodes[0].ChildNodes[0].Token.ValueString;
var val = child.ChildNodes[2].Token.ValueString;
operation.WhereClauses.Add(column, val);
}
}
}
else if (node.Term.Name == "binExpr" && operation.WhereClauses.Count == 0)
{
// Handle a single where clause.
var column = node.ChildNodes[0].ChildNodes[0].Token.ValueString;
var val = node.ChildNodes[2].Token.ValueString;
operation.WhereClauses.Add(column, val);
}
}
}
/// <summary>
/// Build the current operation in the <see cref="QueryExecutionPlan"/> by reading the abstract syntax tree.
/// </summary>
/// <param name="scope">Scope of the current <see cref="ParseTreeNode"/>.</param>
/// <param name="node">Current <see cref="ParseTreeNode"/> in the abstract syntax tree.</param>
/// <param name="plan">The current <see cref="QueryExecutionPlan"/> being built.</param>
public void BuildOperation(Stack <string> scope, ParseTreeNode node, QueryExecutionPlan plan)
{
UpdateOperation operation;
if (node.Term.Name == this.OperationName)
{
// Update statement
operation = new UpdateOperation();
operation.TableName = node.ChildNodes[1].ChildNodes[0].Token.ValueString;
plan.Operations.Add(operation);
}
operation = (UpdateOperation)plan.Current;
if (node.Term.Name == "assignment")
{
operation.Assignments.Add(node.ChildNodes[0].ChildNodes[0].Token.ValueString, node.ChildNodes[2].Token.ValueString);
}
else if (scope.Contains("whereClauseOpt") && node.Term.Name == "binExpr")
{
// Where clause
if (node.ChildNodes[0].Term.Name == "binExpr")
{
// Handle multiple where clauses.
foreach (var child in node.ChildNodes)
{
if (child.Term.Name == "binExpr")
{
var column = child.ChildNodes[0].ChildNodes[0].Token.ValueString;
var val = child.ChildNodes[2].Token.ValueString;
operation.WhereClauses.Add(column, val);
}
}
}
else if (node.Term.Name == "binExpr" && operation.WhereClauses.Count == 0)
{
// Handle a single where clause.
var column = node.ChildNodes[0].ChildNodes[0].Token.ValueString;
var val = node.ChildNodes[2].Token.ValueString;
operation.WhereClauses.Add(column, val);
}
}
}
