public SqlExpression Translate(SqlExpression instance, MethodInfo method, IReadOnlyList <SqlExpression> arguments, IDiagnosticsLogger <DbLoggerCategory.Query> logger)
{
if (!method.Equals(MethodInfo))
{
return(null);
}
var patternExpression = _fbSqlExpressionFactory.ApplyDefaultTypeMapping(arguments[0]);
var positionExpression = _fbSqlExpressionFactory.GreaterThan(
_fbSqlExpressionFactory.Function(
"POSITION",
new[] { patternExpression, instance },
true,
new[] { true, true },
typeof(int)),
_fbSqlExpressionFactory.Constant(0));
return(patternExpression is SqlConstantExpression sqlConstantExpression
? ((string)sqlConstantExpression.Value)?.Length == 0
? (SqlExpression)_fbSqlExpressionFactory.Constant(true)
: positionExpression
: _fbSqlExpressionFactory.OrElse(
positionExpression,
_fbSqlExpressionFactory.Equal(
patternExpression,
_fbSqlExpressionFactory.Constant(string.Empty))));
}
public SqlExpression Translate(SqlExpression instance, MethodInfo method, IReadOnlyList <SqlExpression> arguments)
{
if (!method.Equals(MethodInfo))
{
return(null);
}
var patternExpression = arguments[0];
var positionExpression = _fbSqlExpressionFactory.GreaterThan(
_fbSqlExpressionFactory.Function(
"POSITION",
new[] { patternExpression, instance },
typeof(int)),
_fbSqlExpressionFactory.Constant(0));
return(patternExpression is SqlConstantExpression sqlConstantExpression
? ((string)sqlConstantExpression.Value)?.Length == 0
? (SqlExpression)_fbSqlExpressionFactory.Constant(true)
: positionExpression
: _fbSqlExpressionFactory.OrElse(
positionExpression,
_fbSqlExpressionFactory.Equal(
patternExpression,
_fbSqlExpressionFactory.Constant(string.Empty))));
}
public SqlExpression Translate(SqlExpression instance, MethodInfo method, IReadOnlyList <SqlExpression> arguments, IDiagnosticsLogger <DbLoggerCategory.Query> logger)
{
if (method.IsGenericMethod &&
method.GetGenericMethodDefinition().Equals(EnumerableMethods.Contains) &&
arguments[0].Type == typeof(byte[]))
{
var value = arguments[1] is SqlConstantExpression constantValue
? _fbSqlExpressionFactory.Function("ASCII_CHAR", new[] { _fbSqlExpressionFactory.Constant((byte)constantValue.Value) }, false, new[] { false }, typeof(string))
: _fbSqlExpressionFactory.Function("ASCII_CHAR", new[] { _fbSqlExpressionFactory.Convert(_fbSqlExpressionFactory.ApplyDefaultTypeMapping(arguments[1]), typeof(byte)) }, true, new[] { true }, typeof(string));
return(_fbSqlExpressionFactory.GreaterThan(
_fbSqlExpressionFactory.Function(
"POSITION",
new[] { value, _fbSqlExpressionFactory.ApplyDefaultTypeMapping(arguments[0]) },
true,
new[] { true, true },
typeof(int)),
_fbSqlExpressionFactory.Constant(0)));
}
return(null);
}
