private void CreateUpdateCommandText(bool hasMutableColumns)
{
var stringBuilderArguments = new StringBuilder();
var stringBuilderParameters = new StringBuilder();
var stringBuilderParametersValues = new StringBuilder();
string empty = string.Empty;
string str1 = SqliteManagementUtils.JoinOneTablesOnParametersValues(this.TableDescription.PrimaryKeys, "[side]");
string str2 = SqliteManagementUtils.JoinTwoTablesOnClause(this.TableDescription.PrimaryKeys, "[c]", "[base]");
string str7 = SqliteManagementUtils.JoinTwoTablesOnClause(this.TableDescription.PrimaryKeys, "[p]", "[side]");
// Generate Update command
var stringBuilder = new StringBuilder();
foreach (var mutableColumn in this.TableDescription.GetMutableColumns(false, true))
{
var columnName = ParserName.Parse(mutableColumn).Quoted().ToString();
var columnParameterName = ParserName.Parse(mutableColumn).Unquoted().Normalized().ToString();
stringBuilderParametersValues.Append($"{empty}@{columnParameterName} as {columnName}");
stringBuilderArguments.Append($"{empty}{columnName}");
stringBuilderParameters.Append($"{empty}[c].{columnName}");
empty = ", ";
}
stringBuilder.AppendLine($"INSERT OR REPLACE INTO {tableName.Quoted().ToString()}");
stringBuilder.AppendLine($"({stringBuilderArguments.ToString()})");
stringBuilder.AppendLine($"SELECT {stringBuilderParameters.ToString()} ");
stringBuilder.AppendLine($"FROM (SELECT {stringBuilderParametersValues.ToString()}) as [c]");
stringBuilder.AppendLine($"LEFT JOIN {trackingName.Quoted().ToString()} AS [side] ON {str1}");
stringBuilder.AppendLine($"LEFT JOIN {tableName.Quoted().ToString()} AS [base] ON {str2}");
stringBuilder.Append($"WHERE ({SqliteManagementUtils.WhereColumnAndParameters(this.TableDescription.PrimaryKeys, "[base]")} ");
stringBuilder.AppendLine($"AND ([side].[timestamp] < @sync_min_timestamp OR [side].[update_scope_id] = @sync_scope_id)) ");
stringBuilder.Append($"OR ({SqliteManagementUtils.WhereColumnIsNull(this.TableDescription.PrimaryKeys, "[base]")} ");
stringBuilder.AppendLine($"AND ([side].[timestamp] < @sync_min_timestamp OR [side].[timestamp] IS NULL)) ");
stringBuilder.AppendLine($"OR @sync_force_write = 1;");
stringBuilder.AppendLine();
stringBuilder.AppendLine($"UPDATE OR IGNORE {trackingName.Quoted().ToString()} SET ");
stringBuilder.AppendLine("[update_scope_id] = @sync_scope_id,");
stringBuilder.AppendLine("[sync_row_is_tombstone] = 0,");
stringBuilder.AppendLine("[last_change_datetime] = datetime('now')");
stringBuilder.AppendLine($"WHERE {SqliteManagementUtils.WhereColumnAndParameters(this.TableDescription.PrimaryKeys, "")}");
stringBuilder.AppendLine($" AND (select changes()) > 0;");
var cmdtext = stringBuilder.ToString();
this.AddName(DbCommandType.UpdateRow, cmdtext);
}
private void CreateInitializeCommandText()
{
var stringBuilderArguments = new StringBuilder();
var stringBuilderParameters = new StringBuilder();
var stringBuilderParametersValues = new StringBuilder();
var stringBuilderParametersValues2 = new StringBuilder();
string empty = string.Empty;
string str1 = SqliteManagementUtils.JoinOneTablesOnParametersValues(this.TableDescription.PrimaryKeys, "[side]");
string str2 = SqliteManagementUtils.JoinOneTablesOnParametersValues(this.TableDescription.PrimaryKeys, "[base]");
string str7 = SqliteManagementUtils.JoinTwoTablesOnClause(this.TableDescription.PrimaryKeys, "[p]", "[side]");
// Generate Update command
var stringBuilder = new StringBuilder();
foreach (var mutableColumn in this.TableDescription.GetMutableColumns(false, true))
{
var columnName = ParserName.Parse(mutableColumn).Quoted().ToString();
var columnParameterName = ParserName.Parse(mutableColumn).Unquoted().Normalized().ToString();
stringBuilderParametersValues.Append($"{empty}@{columnParameterName} as {columnName}");
stringBuilderParametersValues2.Append($"{empty}@{columnParameterName}");
stringBuilderArguments.Append($"{empty}{columnName}");
stringBuilderParameters.Append($"{empty}[c].{columnName}");
empty = ", ";
}
stringBuilder.AppendLine($"INSERT OR IGNORE INTO {tableName.Quoted().ToString()}");
stringBuilder.AppendLine($"({stringBuilderArguments.ToString()})");
stringBuilder.Append($"VALUES ({stringBuilderParametersValues2.ToString()}) ");
stringBuilder.AppendLine($";");
stringBuilder.AppendLine($"UPDATE OR IGNORE {trackingName.Quoted().ToString()} SET ");
stringBuilder.AppendLine("[update_scope_id] = @sync_scope_id,");
stringBuilder.AppendLine("[sync_row_is_tombstone] = 0,");
stringBuilder.AppendLine("[last_change_datetime] = datetime('now')");
stringBuilder.AppendLine($"WHERE {SqliteManagementUtils.WhereColumnAndParameters(this.TableDescription.PrimaryKeys, "")}");
stringBuilder.Append($" AND (select changes()) > 0");
stringBuilder.AppendLine($";");
var cmdtext = stringBuilder.ToString();
this.AddCommandName(DbCommandType.InsertRow, cmdtext);
this.AddCommandName(DbCommandType.InsertRows, cmdtext);
}
private void CreateUpdateCommandText()
{
var stringBuilderArguments = new StringBuilder();
var stringBuilderParameters = new StringBuilder();
var stringBuilderParametersValues = new StringBuilder();
string empty = string.Empty;
string str1 = SqliteManagementUtils.JoinOneTablesOnParametersValues(this.TableDescription.PrimaryKeys, "[side]");
string str2 = SqliteManagementUtils.JoinOneTablesOnParametersValues(this.TableDescription.PrimaryKeys, "[base]");
// Generate Update command
var stringBuilder = new StringBuilder();
foreach (var mutableColumn in this.TableDescription.GetMutableColumns(false, true))
{
var columnName = ParserName.Parse(mutableColumn).Quoted().ToString();
var columnParameterName = ParserName.Parse(mutableColumn).Unquoted().Normalized().ToString();
stringBuilderParametersValues.Append($"{empty}@{columnParameterName} as {columnName}");
stringBuilderArguments.Append($"{empty}{columnName}");
stringBuilderParameters.Append($"{empty}[c].{columnName}");
empty = "\n, ";
}
// create update statement without PK
var emptyUpdate = string.Empty;
var columnsToUpdate = false;
var stringBuilderUpdateSet = new StringBuilder();
foreach (var mutableColumn in this.TableDescription.GetMutableColumns(false, false))
{
var columnName = ParserName.Parse(mutableColumn).Quoted().ToString();
stringBuilderUpdateSet.Append($"{emptyUpdate}{columnName}=excluded.{columnName}");
emptyUpdate = "\n, ";
columnsToUpdate = true;
}
var primaryKeys = string.Join(",",
this.TableDescription.PrimaryKeys.Select(name => ParserName.Parse(name).Quoted().ToString()));
// add CTE
stringBuilder.AppendLine($"WITH CHANGESET as (SELECT {stringBuilderParameters.ToString()} ");
stringBuilder.AppendLine($"FROM (SELECT {stringBuilderParametersValues.ToString()}) as [c]");
stringBuilder.AppendLine($"LEFT JOIN {trackingName.Quoted().ToString()} AS [side] ON {str1}");
stringBuilder.AppendLine($"LEFT JOIN {tableName.Quoted().ToString()} AS [base] ON {str2}");
//stringBuilder.AppendLine($"WHERE ({SqliteManagementUtils.WhereColumnAndParameters(this.TableDescription.PrimaryKeys, "[base]")} ");
stringBuilder.AppendLine($"WHERE ([side].[timestamp] < @sync_min_timestamp OR [side].[update_scope_id] = @sync_scope_id) ");
stringBuilder.Append($"OR ({SqliteManagementUtils.WhereColumnIsNull(this.TableDescription.PrimaryKeys, "[base]")} ");
stringBuilder.AppendLine($"AND ([side].[timestamp] < @sync_min_timestamp OR [side].[timestamp] IS NULL)) ");
stringBuilder.Append($"OR @sync_force_write = 1");
stringBuilder.AppendLine($")");
stringBuilder.AppendLine($"INSERT INTO {tableName.Quoted().ToString()}");
stringBuilder.AppendLine($"({stringBuilderArguments.ToString()})");
// use CTE here. The CTE is required in order to make the "ON CONFLICT" statement work. Otherwise SQLite cannot parse it
// Note, that we have to add the pseudo WHERE TRUE clause here, as otherwise the SQLite parser may confuse the following ON
// with a join clause, thus, throwing a parsing error
// See a detailed explanation here at the official SQLite documentation: "Parsing Ambiguity" on page https://www.sqlite.org/lang_UPSERT.html
stringBuilder.AppendLine($" SELECT * from CHANGESET WHERE TRUE");
if (columnsToUpdate)
{
stringBuilder.AppendLine($" ON CONFLICT ({primaryKeys}) DO UPDATE SET ");
stringBuilder.Append(stringBuilderUpdateSet.ToString()).AppendLine(";");
}
else
{
stringBuilder.AppendLine($" ON CONFLICT ({primaryKeys}) DO NOTHING; ");
}
stringBuilder.AppendLine();
stringBuilder.AppendLine();
stringBuilder.AppendLine($"UPDATE OR IGNORE {trackingName.Quoted().ToString()} SET ");
stringBuilder.AppendLine($"[update_scope_id] = @sync_scope_id,");
stringBuilder.AppendLine($"[sync_row_is_tombstone] = 0,");
stringBuilder.AppendLine($"[timestamp] = {SqliteObjectNames.TimestampValue},");
stringBuilder.AppendLine($"[last_change_datetime] = datetime('now')");
stringBuilder.AppendLine($"WHERE {SqliteManagementUtils.WhereColumnAndParameters(this.TableDescription.PrimaryKeys, "")}");
stringBuilder.AppendLine($" AND (select changes()) > 0;");
var cmdtext = stringBuilder.ToString();
this.AddCommandName(DbCommandType.UpdateRow, cmdtext);
this.AddCommandName(DbCommandType.UpdateRows, cmdtext);
}
