Deveel.Data.Sql.Statements.StatementExecutor.QueryPreparer Class Reference

Inheritance diagram for Deveel.Data.Sql.Statements.StatementExecutor.QueryPreparer:

Public Member Functions
	QueryPreparer (SqlQuery query)
bool	CanPrepare (SqlExpression expression)
	Verifies whether the instance of the interface can prepare the given expression. More...
SqlExpression	Prepare (SqlExpression expression)
	Returns the new translated object to be mutated from the given expression. More...

Private Attributes
readonly SqlQuery	query

Detailed Description

Definition at line 105 of file StatementExecutor.cs.

Constructor & Destructor Documentation

Deveel.Data.Sql.Statements.StatementExecutor.QueryPreparer.QueryPreparer ( SqlQuery  query )

inline

Definition at line 108 of file StatementExecutor.cs.

                                                 {
                this.query = query;
            }

Member Function Documentation

bool Deveel.Data.Sql.Statements.StatementExecutor.QueryPreparer.CanPrepare ( SqlExpression  expression )

inline

Verifies whether the instance of the interface can prepare the given expression.

Parameters

expression

The expression object to verify.

Returns

Returns true if this preparer will prepare the given object in an expression.

Implements Deveel.Data.Sql.Expressions.IExpressionPreparer.

Definition at line 112 of file StatementExecutor.cs.

                                                             {
                return expression is SqlVariableReferenceExpression;
            }

SqlExpression Deveel.Data.Sql.Statements.StatementExecutor.QueryPreparer.Prepare ( SqlExpression  expression )

inline

Returns the new translated object to be mutated from the given expression.

Parameters

expression

Returns

Implements Deveel.Data.Sql.Expressions.IExpressionPreparer.

Definition at line 116 of file StatementExecutor.cs.

                                                                   {
                var varRef = (SqlVariableReferenceExpression) expression;
                var varName = varRef.VariableName;

                var parameter = query.Parameters.FindParameter(varName);
                if (parameter == null)
                    return expression;

                var value = parameter.SqlType.CreateFrom(parameter.Value);
                var obj = new DataObject(parameter.SqlType, value);

                return SqlExpression.Constant(obj);
            }

Member Data Documentation

readonly SqlQuery Deveel.Data.Sql.Statements.StatementExecutor.QueryPreparer.query

private

Definition at line 106 of file StatementExecutor.cs.

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The documentation for this class was generated from the following file:

• /var/calculate/remote/distfiles/egit-src/deveeldb.git/src/deveeldb/Deveel.Data.Sql.Statements/StatementExecutor.cs