/// <summary>
/// Returns full definition of the column.
/// </summary>
/// <param name="addDefaults">Whether default value should be added in case NOT NULL constraint is specified but no default value is set.</param>
/// <returns>Full definition of the column.</returns>
public string GetFullDefinition(bool addDefaults)
{
var definitionSql = new StringBuilder(100);
definitionSql.Append(PgDiffStringExtension.QuoteName(this.Name));
definitionSql.Append(' ');
definitionSql.Append(this.Type);
if (this.DefaultValue != null && this.DefaultValue.Length > 0)
{
definitionSql.Append(" DEFAULT ");
definitionSql.Append(this.DefaultValue);
}
else if (!this.NullValue && addDefaults)
{
var defaultColValue = PgColumnUtils.GetDefaultValue(this.Type);
if (defaultColValue != null)
{
definitionSql.Append(" DEFAULT ");
definitionSql.Append(defaultColValue);
}
}
if (!this.NullValue)
{
definitionSql.Append(" NOT NULL");
}
return(definitionSql.ToString());
}
/// <summary>
/// Generate the needed alter table xxx set storage when needed.
/// </summary>
private static void AddAlterStorage(StreamWriter writer, PgTable oldTable, PgTable newTable, SearchPathHelper searchPathHelper)
{
foreach (PgColumn newColumn in newTable.Columns)
{
PgColumn oldColumn = oldTable.GetColumn(newColumn.Name);
var oldStorage = (oldColumn == null || oldColumn.Storage == null || oldColumn.Storage == string.Empty) ? null : oldColumn.Storage;
var newStorage = (newColumn.Storage == null || newColumn.Storage == string.Empty) ? null : newColumn.Storage;
if (newStorage == null && oldStorage != null)
{
searchPathHelper.OutputSearchPath(writer);
writer.WriteLine();
writer.WriteLine($"WarningUnableToDetermineStorageType {newTable.Name + '.' + newColumn.Name}");
continue;
}
if (newStorage == null || newStorage.Equals(oldStorage, StringComparison.CurrentCultureIgnoreCase))
{
continue;
}
searchPathHelper.OutputSearchPath(writer);
writer.WriteLine();
writer.Write("ALTER TABLE ONLY ");
writer.Write(PgDiffStringExtension.QuoteName(newTable.Name));
writer.Write(" ALTER COLUMN ");
writer.Write(PgDiffStringExtension.QuoteName(newColumn.Name));
writer.Write(" SET STORAGE ");
writer.Write(newStorage);
writer.Write(';');
}
}
/// <summary>
/// Creates argument declaration.
/// </summary>
/// <param name="includeDefaultValue">Whether to include default value.</param>
public string GetDeclaration(bool includeDefaultValue)
{
var declarationSql = new StringBuilder(50);
if (this.mode != null && !"IN".Equals(this.mode, StringComparison.CurrentCultureIgnoreCase))
{
declarationSql.Append(this.mode);
declarationSql.Append(' ');
}
if (this.Name != null && this.Name.Length > 0)
{
declarationSql.Append(PgDiffStringExtension.QuoteName(this.Name));
declarationSql.Append(' ');
}
declarationSql.Append(this.DataType);
if (includeDefaultValue && this.DefaultExpression != null && this.DefaultExpression.Length > 0)
{
declarationSql.Append(" = ");
declarationSql.Append(this.DefaultExpression);
}
return(declarationSql.ToString());
}
/// <summary>
/// Checks whether OIDS are dropped from the new table. There is no way to add OIDS to existing table so we do not
/// create SQL statement for addition of OIDS but we issue warning.
/// </summary>
private static void CheckWithOIDS(StreamWriter writer, PgTable oldTable, PgTable newTable, SearchPathHelper searchPathHelper)
{
if ((oldTable.With == null && newTable.With == null) ||
(oldTable.With != null && oldTable.With.Equals(newTable.With)))
{
return;
}
searchPathHelper.OutputSearchPath(writer);
writer.WriteLine();
writer.WriteLine("ALTER TABLE " + PgDiffStringExtension.QuoteName(newTable.Name));
if (newTable.With == null || "OIDS=false".Equals(newTable.With, StringComparison.CurrentCultureIgnoreCase))
{
writer.WriteLine("\tSET WITHOUT OIDS;");
}
else if ("OIDS".Equals(newTable.With, StringComparison.CurrentCultureIgnoreCase) || "OIDS=true".Equals(newTable.With, StringComparison.CurrentCultureIgnoreCase))
{
writer.WriteLine("\tSET WITH OIDS;");
}
else
{
writer.WriteLine("\tSET " + newTable.With + ";");
}
}
/// <summary>
/// Adds statements for modification of columns to the list of statements.
/// </summary>
private static void AddModifyTableColumns(IList <string> statements, PgTable oldTable, PgTable newTable, IList <PgColumn> dropDefaultsColumns, bool addDefaults)
{
foreach (PgColumn newColumn in newTable.Columns)
{
if (!oldTable.ContainsColumn(newColumn.Name))
{
continue;
}
PgColumn oldColumn = oldTable.GetColumn(newColumn.Name);
var newColumnName = PgDiffStringExtension.QuoteName(newColumn.Name);
if (!oldColumn.Type.Equals(newColumn.Type))
{
statements.Add($"\tALTER COLUMN {newColumnName} TYPE {newColumn.Type} /* TypeParameterChange of table {newTable.Name}. Old: {oldColumn.Type} New: {newColumn.Type} */");
}
var oldDefault = oldColumn.DefaultValue ?? string.Empty;
var newDefault = newColumn.DefaultValue ?? string.Empty;
if (!oldDefault.Equals(newDefault))
{
if (newDefault.Length == 0)
{
statements.Add("\tALTER COLUMN " + newColumnName + " DROP DEFAULT");
}
else
{
statements.Add("\tALTER COLUMN " + newColumnName + " SET DEFAULT " + newDefault);
}
}
if (oldColumn.NullValue != newColumn.NullValue)
{
if (newColumn.NullValue)
{
statements.Add("\tALTER COLUMN " + newColumnName + " DROP NOT NULL");
}
else
{
if (addDefaults)
{
var defaultValue = PgColumnUtils.GetDefaultValue(newColumn.Type);
if (defaultValue != null)
{
statements.Add("\tALTER COLUMN " + newColumnName + " SET DEFAULT " + defaultValue);
dropDefaultsColumns.Add(newColumn);
}
}
statements.Add("\tALTER COLUMN " + newColumnName + " SET NOT NULL");
}
}
}
}
/// <summary>
/// Outputs statements for tables and columns for which comments have
/// changed.
/// </summary>
private static void AlterComments(StreamWriter writer, PgTable oldTable, PgTable newTable, SearchPathHelper searchPathHelper)
{
if ((oldTable.Comment == null && newTable.Comment != null) ||
(oldTable.Comment != null &&
newTable.Comment != null &&
!oldTable.Comment.Equals(newTable.Comment)))
{
searchPathHelper.OutputSearchPath(writer);
writer.WriteLine();
writer.Write("COMMENT ON TABLE ");
writer.Write(PgDiffStringExtension.QuoteName(newTable.Name));
writer.Write(" IS ");
writer.Write(newTable.Comment);
writer.WriteLine(';');
}
else if (oldTable.Comment != null && newTable.Comment == null)
{
searchPathHelper.OutputSearchPath(writer);
writer.WriteLine();
writer.Write("COMMENT ON TABLE ");
writer.Write(PgDiffStringExtension.QuoteName(newTable.Name));
writer.WriteLine(" IS NULL;");
}
foreach (PgColumn newColumn in newTable.Columns)
{
PgColumn oldColumn = oldTable.GetColumn(newColumn.Name);
var oldComment = oldColumn?.Comment;
var newComment = newColumn.Comment;
if (newComment != null && (oldComment == null ? newComment != null : !oldComment.Equals(newComment)))
{
searchPathHelper.OutputSearchPath(writer);
writer.WriteLine();
writer.Write("COMMENT ON COLUMN ");
writer.Write(PgDiffStringExtension.QuoteName(newTable.Name));
writer.Write('.');
writer.Write(PgDiffStringExtension.QuoteName(newColumn.Name));
writer.Write(" IS ");
writer.Write(newColumn.Comment);
writer.WriteLine(';');
}
else if (oldComment != null && newComment == null)
{
searchPathHelper.OutputSearchPath(writer);
writer.WriteLine();
writer.Write("COMMENT ON COLUMN ");
writer.Write(PgDiffStringExtension.QuoteName(newTable.Name));
writer.Write('.');
writer.Write(PgDiffStringExtension.QuoteName(newColumn.Name));
writer.WriteLine(" IS NULL;");
}
}
}
/// <summary>
/// Adds statements for removal of columns to the list of statements.
/// </summary>
private static void AddDropTableColumns(IList <string> statements, PgTable oldTable, PgTable newTable)
{
foreach (PgColumn column in oldTable.Columns)
{
if (!newTable.ContainsColumn(column.Name))
{
statements.Add("\tDROP COLUMN " + PgDiffStringExtension.QuoteName(column.Name));
}
}
}
/// <summary>
/// Outputs statements for trigger comments that have changed.
/// </summary>
public static void AlterComments(StreamWriter writer, [NullGuard.AllowNull] PgSchema oldSchema, PgSchema newSchema, SearchPathHelper searchPathHelper)
{
if (oldSchema == null)
{
return;
}
foreach (PgTable oldTable in oldSchema.Tables)
{
PgTable newTable = newSchema.GetTable(oldTable.Name);
if (newTable == null)
{
continue;
}
foreach (PgTrigger oldTrigger in oldTable.Triggers)
{
PgTrigger newTrigger = newTable.GetTrigger(oldTrigger.Name);
if (newTrigger == null)
{
continue;
}
if ((oldTrigger.Comment == null && newTrigger.Comment != null) ||
(oldTrigger.Comment != null &&
newTrigger.Comment != null &&
!oldTrigger.Comment.Equals(newTrigger.Comment)))
{
searchPathHelper.OutputSearchPath(writer);
writer.WriteLine();
writer.Write("COMMENT ON TRIGGER ");
writer.Write(PgDiffStringExtension.QuoteName(newTrigger.Name));
writer.Write(" ON ");
writer.Write(PgDiffStringExtension.QuoteName(newTrigger.TableName));
writer.Write(" IS ");
writer.Write(newTrigger.Comment);
writer.WriteLine(';');
}
else if (oldTrigger.Comment != null && newTrigger.Comment == null)
{
searchPathHelper.OutputSearchPath(writer);
writer.WriteLine();
writer.Write("COMMENT ON TRIGGER ");
writer.Write(PgDiffStringExtension.QuoteName(newTrigger.Name));
writer.Write(" ON ");
writer.Write(PgDiffStringExtension.QuoteName(newTrigger.TableName));
writer.WriteLine(" IS NULL;");
}
}
}
}
public string RenameToSql(string newName)
{
var renameSql = new StringBuilder("ALTER TABLE ");
renameSql.Append(PgDiffStringExtension.QuoteName(this.TableName));
renameSql.Append("\tRENAME CONSTRAINT ");
renameSql.Append(PgDiffStringExtension.QuoteName(this.Name));
renameSql.Append(" TO ");
renameSql.Append(PgDiffStringExtension.QuoteName(newName));
renameSql.Append(';');
return(renameSql.ToString());
}
/// <summary>
/// Gets the SQL which can be used to alter the <see cref="PgType"/> and adds the given value to it.
/// </summary>
/// <param name="newValue">Value which is added to the <see cref="PgType"/>.</param>
/// <returns>The SQL which can alter the <see cref="PgType"/>.</returns>
public string AlterSQL(string newValue)
{
var alterString = new StringBuilder(100);
alterString.AppendLine("-- Add value only if it does not exist because if the undo diff is called the value wont be removed (not possible in postgres 9.4 without dropping the whole enum)");
alterString.Append("ALTER TYPE ");
alterString.Append(PgDiffStringExtension.QuoteName(this.Name));
alterString.Append(" ADD VALUE IF NOT EXISTS ");
alterString.Append(newValue);
alterString.Append(";");
return(alterString.ToString());
}
/// <summary>
/// Checks tablespace modification.
/// </summary>
private static void CheckTablespace(StreamWriter writer, PgTable oldTable, PgTable newTable, SearchPathHelper searchPathHelper)
{
if ((oldTable.Tablespace == null && newTable.Tablespace == null) ||
(oldTable.Tablespace != null &&
oldTable.Tablespace.Equals(newTable.Tablespace)))
{
return;
}
searchPathHelper.OutputSearchPath(writer);
writer.WriteLine();
writer.WriteLine("ALTER TABLE " + PgDiffStringExtension.QuoteName(newTable.Name));
writer.WriteLine("\tTABLESPACE " + newTable.Tablespace + ';');
}
/// <summary>
/// Generate the needed alter table xxx set statistics when needed.
/// </summary>
private static void AddAlterStatistics(StreamWriter writer, PgTable oldTable, PgTable newTable, SearchPathHelper searchPathHelper)
{
var stats = new Dictionary <string, int?>();
foreach (PgColumn newColumn in newTable.Columns)
{
PgColumn oldColumn = oldTable.GetColumn(newColumn.Name);
if (oldColumn != null)
{
int?oldStat = oldColumn.Statistics;
int?newStat = newColumn.Statistics;
int?newStatValue = null;
if (newStat != null && (oldStat == null || !newStat.Equals(oldStat)))
{
newStatValue = newStat;
}
else if (oldStat != null && newStat == null)
{
newStatValue = Convert.ToInt32(-1);
}
if (newStatValue != null)
{
stats[newColumn.Name] = newStatValue;
}
}
}
foreach (KeyValuePair <string, int?> entry in stats)
{
searchPathHelper.OutputSearchPath(writer);
writer.WriteLine();
writer.Write("ALTER TABLE ONLY ");
writer.Write(PgDiffStringExtension.QuoteName(newTable.Name));
writer.Write(" ALTER COLUMN ");
writer.Write(PgDiffStringExtension.QuoteName(entry.Key));
writer.Write(" SET STATISTICS ");
writer.Write(entry.Value);
writer.WriteLine(';');
}
}
/// <summary>
/// Outputs statements for dropping of clusters.
/// </summary>
public static void CreateClusters(StreamWriter writer, [NullGuard.AllowNull] PgSchema oldSchema, PgSchema newSchema, SearchPathHelper searchPathHelper)
{
foreach (PgTable newTable in newSchema.Tables)
{
PgTable oldTable;
if (oldSchema == null)
{
oldTable = null;
}
else
{
oldTable = oldSchema.GetTable(newTable.Name);
}
string oldCluster;
if (oldTable == null)
{
oldCluster = null;
}
else
{
oldCluster = oldTable.ClusterIndexName;
}
var newCluster = newTable.ClusterIndexName;
if ((oldCluster == null && newCluster != null) || (oldCluster != null && newCluster != null && newCluster.CompareTo(oldCluster) != 0))
{
searchPathHelper.OutputSearchPath(writer);
writer.WriteLine();
writer.Write("ALTER TABLE ");
writer.Write(PgDiffStringExtension.QuoteName(newTable.Name));
writer.Write(" CLUSTER ON ");
writer.Write(PgDiffStringExtension.QuoteName(newCluster));
writer.WriteLine(';');
}
}
}
/// <summary>
/// Outputs statements for index comments that have changed.
/// </summary>
public static void AlterComments(StreamWriter writer, [NullGuard.AllowNull] PgSchema oldSchema, PgSchema newSchema, SearchPathHelper searchPathHelper)
{
if (oldSchema == null)
{
return;
}
foreach (PgIndex oldIndex in oldSchema.Indexes)
{
PgIndex newIndex = newSchema.GetIndex(oldIndex.Name);
if (newIndex == null)
{
continue;
}
if ((oldIndex.Comment == null && newIndex.Comment != null) ||
(oldIndex.Comment != null &&
newIndex.Comment != null &&
!oldIndex.Comment.Equals(newIndex.Comment)))
{
searchPathHelper.OutputSearchPath(writer);
writer.WriteLine();
writer.Write("COMMENT ON INDEX ");
writer.Write(PgDiffStringExtension.QuoteName(newIndex.Name));
writer.Write(" IS ");
writer.Write(newIndex.Comment);
writer.WriteLine(';');
}
else if (oldIndex.Comment != null && newIndex.Comment == null)
{
searchPathHelper.OutputSearchPath(writer);
writer.WriteLine();
writer.Write("COMMENT ON INDEX ");
writer.Write(PgDiffStringExtension.QuoteName(newIndex.Name));
writer.WriteLine(" IS NULL;");
}
}
}
/// <summary>
/// Outputs statements for addition, removal and modifications of table
/// columns.
/// </summary>
private static void UpdateTableColumns(StreamWriter writer, PgTable oldTable, PgTable newTable, SearchPathHelper searchPathHelper)
{
IList <string> statements = new List <string>();
IList <PgColumn> dropDefaultsColumns = new List <PgColumn>();
AddDropTableColumns(statements, oldTable, newTable);
AddCreateTableColumns(statements, oldTable, newTable, dropDefaultsColumns, false);
AddModifyTableColumns(statements, oldTable, newTable, dropDefaultsColumns, false);
if (statements.Count > 0)
{
var quotedTableName = PgDiffStringExtension.QuoteName(newTable.Name);
searchPathHelper.OutputSearchPath(writer);
writer.WriteLine();
writer.WriteLine("ALTER TABLE " + quotedTableName);
for (var i = 0; i < statements.Count; i++)
{
writer.Write(statements[i]);
writer.WriteLine((i + 1) < statements.Count ? "," : ";");
}
if (dropDefaultsColumns.Count > 0)
{
writer.WriteLine();
writer.WriteLine("ALTER TABLE " + quotedTableName);
for (var i = 0; i < dropDefaultsColumns.Count; i++)
{
writer.Write("\tALTER COLUMN ");
writer.Write(PgDiffStringExtension.QuoteName(dropDefaultsColumns[i].Name));
writer.Write(" DROP DEFAULT");
writer.WriteLine((i + 1) < dropDefaultsColumns.Count ? "," : ";");
}
}
}
}
/// <summary>
/// Checks whether there is a discrepancy in INHERITS for original and new
/// table.
/// </summary>
private static void CheckInherits(StreamWriter writer, PgTable oldTable, PgTable newTable, SearchPathHelper searchPathHelper)
{
foreach (var tableName in oldTable.Inherits)
{
if (!newTable.Inherits.Contains(tableName))
{
searchPathHelper.OutputSearchPath(writer);
writer.WriteLine();
writer.WriteLine("ALTER TABLE " + PgDiffStringExtension.QuoteName(newTable.Name));
writer.WriteLine("\tNO INHERIT " + PgDiffStringExtension.QuoteName(tableName) + ';');
}
}
foreach (var tableName in newTable.Inherits)
{
if (!oldTable.Inherits.Contains(tableName))
{
searchPathHelper.OutputSearchPath(writer);
writer.WriteLine();
writer.WriteLine("ALTER TABLE " + PgDiffStringExtension.QuoteName(newTable.Name));
writer.WriteLine("\tINHERIT " + PgDiffStringExtension.QuoteName(tableName) + ';');
}
}
}
/// <summary>
/// Outputs statement for modified sequences.
/// </summary>
public static void Alter(StreamWriter writer, [NullGuard.AllowNull] PgSchema oldSchema, PgSchema newSchema, SearchPathHelper searchPathHelper, bool ignoreStartWith)
{
if (oldSchema == null)
{
return;
}
var alterSequenceSql = new StringBuilder(100);
foreach (PgSequence newSequence in newSchema.Sequences)
{
PgSequence oldSequence = oldSchema.GetSequence(newSequence.Name);
if (oldSequence == null)
{
continue;
}
alterSequenceSql.Length = 0;
var oldIncrement = oldSequence.Increment;
var newIncrement = newSequence.Increment;
if (newIncrement != null && !newIncrement.Equals(oldIncrement))
{
alterSequenceSql.Append("\n\tINCREMENT BY ");
alterSequenceSql.Append(newIncrement);
}
var oldMinValue = oldSequence.MinValue;
var newMinValue = newSequence.MinValue;
if (newMinValue == null && oldMinValue != null)
{
alterSequenceSql.Append("\n\tNO MINVALUE");
}
else if (newMinValue != null && !newMinValue.Equals(oldMinValue))
{
alterSequenceSql.Append("\n\tMINVALUE ");
alterSequenceSql.Append(newMinValue);
}
var oldMaxValue = oldSequence.MaxValue;
var newMaxValue = newSequence.MaxValue;
if (newMaxValue == null && oldMaxValue != null)
{
alterSequenceSql.Append("\n\tNO MAXVALUE");
}
else if (newMaxValue != null && !newMaxValue.Equals(oldMaxValue))
{
alterSequenceSql.Append("\n\tMAXVALUE ");
alterSequenceSql.Append(newMaxValue);
}
if (!ignoreStartWith)
{
var oldStart = oldSequence.StartWith;
var newStart = newSequence.StartWith;
if (newStart != null && !newStart.Equals(oldStart))
{
alterSequenceSql.Append("\n\tRESTART WITH ");
alterSequenceSql.Append(newStart);
}
}
var oldCache = oldSequence.Cache;
var newCache = newSequence.Cache;
if (newCache != null && !newCache.Equals(oldCache))
{
alterSequenceSql.Append("\n\tCACHE ");
alterSequenceSql.Append(newCache);
}
var oldCycle = oldSequence.Cycle;
var newCycle = newSequence.Cycle;
if (oldCycle && !newCycle)
{
alterSequenceSql.Append("\n\tNO CYCLE");
}
else if (!oldCycle && newCycle)
{
alterSequenceSql.Append("\n\tCYCLE");
}
var oldOwnedBy = oldSequence.Owner;
var newOwnedBy = newSequence.Owner;
if (newOwnedBy != null && !newOwnedBy.Equals(oldOwnedBy))
{
alterSequenceSql.Append("\n\tOWNED BY ");
alterSequenceSql.Append(newOwnedBy);
}
if (alterSequenceSql.Length > 0)
{
searchPathHelper.OutputSearchPath(writer);
writer.WriteLine();
writer.Write("ALTER SEQUENCE " + PgDiffStringExtension.QuoteName(newSequence.Name));
writer.Write(alterSequenceSql.ToString());
writer.WriteLine(';');
}
if ((oldSequence.Comment == null && newSequence.Comment != null) ||
(oldSequence.Comment != null &&
newSequence.Comment != null &&
!oldSequence.Comment.Equals(newSequence.Comment)))
{
searchPathHelper.OutputSearchPath(writer);
writer.WriteLine();
writer.Write("COMMENT ON SEQUENCE ");
writer.Write(PgDiffStringExtension.QuoteName(newSequence.Name));
writer.Write(" IS ");
writer.Write(newSequence.Comment);
writer.WriteLine(';');
}
else if (oldSequence.Comment != null && newSequence.Comment == null)
{
searchPathHelper.OutputSearchPath(writer);
writer.WriteLine();
writer.Write("COMMENT ON SEQUENCE ");
writer.Write(newSequence.Name);
writer.WriteLine(" IS NULL;");
}
}
}
/// <summary>
/// Outputs statements for function comments that have changed.
/// </summary>
public static void AlterComments(StreamWriter writer, [NullGuard.AllowNull] PgSchema oldSchema, PgSchema newSchema, SearchPathHelper searchPathHelper)
{
if (oldSchema == null)
{
return;
}
foreach (PgFunction oldfunction in oldSchema.Functions)
{
PgFunction newFunction = newSchema.GetFunction(oldfunction.Signature);
if (newFunction == null)
{
continue;
}
if ((oldfunction.Comment == null && newFunction.Comment != null) ||
(oldfunction.Comment != null && newFunction.Comment != null && !oldfunction.Comment.Equals(newFunction.Comment)))
{
searchPathHelper.OutputSearchPath(writer);
writer.WriteLine();
writer.Write("COMMENT ON FUNCTION ");
writer.Write(PgDiffStringExtension.QuoteName(newFunction.Name));
writer.Write('(');
var addComma = false;
foreach (PgFunction.Argument argument in newFunction.Arguments)
{
if (addComma)
{
writer.Write(", ");
}
else
{
addComma = true;
}
writer.Write(argument.GetDeclaration(false));
}
writer.Write(") IS ");
writer.Write(newFunction.Comment);
writer.WriteLine(';');
}
else if (oldfunction.Comment != null && newFunction.Comment == null)
{
searchPathHelper.OutputSearchPath(writer);
writer.WriteLine();
writer.Write("COMMENT ON FUNCTION ");
writer.Write(PgDiffStringExtension.QuoteName(newFunction.Name));
writer.Write('(');
var addComma = false;
foreach (PgFunction.Argument argument in newFunction.Arguments)
{
if (addComma)
{
writer.Write(", ");
}
else
{
addComma = true;
}
writer.Write(argument.GetDeclaration(false));
}
writer.WriteLine(") IS NULL;");
}
}
}
/// <summary>
/// Outputs statements for altering view default values.
/// </summary>
public static void Alter(StreamWriter writer, [NullGuard.AllowNull] PgSchema oldSchema, PgSchema newSchema, SearchPathHelper searchPathHelper)
{
if (oldSchema == null)
{
return;
}
foreach (PgView oldView in oldSchema.Views)
{
PgView newView = newSchema.GetView(oldView.Name);
if (newView == null)
{
continue;
}
DiffDefaultValues(writer, oldView, newView, searchPathHelper);
if ((oldView.Comment == null && newView.Comment != null) ||
(oldView.Comment != null &&
newView.Comment != null &&
!oldView.Comment.Equals(newView.Comment)))
{
searchPathHelper.OutputSearchPath(writer);
writer.WriteLine();
writer.Write("COMMENT ON VIEW ");
writer.Write(PgDiffStringExtension.QuoteName(newView.Name));
writer.Write(" IS ");
writer.Write(newView.Comment);
writer.WriteLine(';');
}
else if (oldView.Comment != null && newView.Comment == null)
{
searchPathHelper.OutputSearchPath(writer);
writer.WriteLine();
writer.Write("COMMENT ON VIEW ");
writer.Write(PgDiffStringExtension.QuoteName(newView.Name));
writer.WriteLine(" IS NULL;");
}
IList <string> columnNames = new List <string>(newView.ColumnComments.Count);
foreach (PgView.ColumnComment columnComment in newView.ColumnComments)
{
columnNames.Add(columnComment.ColumnName);
}
foreach (PgView.ColumnComment columnComment in oldView.ColumnComments)
{
if (!columnNames.Contains(columnComment.ColumnName))
{
columnNames.Add(columnComment.ColumnName);
}
}
foreach (var columnName in columnNames)
{
PgView.ColumnComment oldColumnComment = null;
PgView.ColumnComment newColumnComment = null;
foreach (PgView.ColumnComment columnComment in oldView.ColumnComments)
{
if (columnName.Equals(columnComment.ColumnName))
{
oldColumnComment = columnComment;
break;
}
}
foreach (PgView.ColumnComment columnComment in newView.ColumnComments)
{
if (columnName.Equals(columnComment.ColumnName))
{
newColumnComment = columnComment;
break;
}
}
if ((oldColumnComment == null && newColumnComment != null) ||
(oldColumnComment != null &&
newColumnComment != null &&
!oldColumnComment.Comment.Equals(newColumnComment.Comment)))
{
searchPathHelper.OutputSearchPath(writer);
writer.WriteLine();
writer.Write("COMMENT ON COLUMN ");
writer.Write(PgDiffStringExtension.QuoteName(newView.Name));
writer.Write('.');
writer.Write(PgDiffStringExtension.QuoteName(newColumnComment.ColumnName));
writer.Write(" IS ");
writer.Write(newColumnComment.Comment);
writer.WriteLine(';');
}
else if (oldColumnComment != null && newColumnComment == null)
{
searchPathHelper.OutputSearchPath(writer);
writer.WriteLine();
writer.Write("COMMENT ON COLUMN ");
writer.Write(PgDiffStringExtension.QuoteName(newView.Name));
writer.Write('.');
writer.Write(PgDiffStringExtension.QuoteName(oldColumnComment.ColumnName));
writer.WriteLine(" IS NULL;");
}
}
}
}
/// <summary>
/// Outputs statements for constraint comments that have changed.
/// </summary>
public static void AlterComments(StreamWriter writer, [NullGuard.AllowNull] PgSchema oldSchema, PgSchema newSchema, SearchPathHelper searchPathHelper)
{
if (oldSchema == null)
{
return;
}
foreach (PgTable oldTable in oldSchema.Tables)
{
PgTable newTable = newSchema.GetTable(oldTable.Name);
if (newTable == null)
{
continue;
}
foreach (PgConstraint oldConstraint in oldTable.Constraints)
{
PgConstraint newConstraint = newTable.GetConstraint(oldConstraint.Name);
if (newConstraint == null)
{
continue;
}
if ((oldConstraint.Comment == null && newConstraint.Comment != null) ||
(oldConstraint.Comment != null && newConstraint.Comment != null && !oldConstraint.Comment.Equals(newConstraint.Comment)))
{
searchPathHelper.OutputSearchPath(writer);
writer.WriteLine();
writer.Write("COMMENT ON ");
if (newConstraint.PrimaryKeyConstraint)
{
writer.Write("INDEX ");
writer.Write(PgDiffStringExtension.QuoteName(newConstraint.Name));
}
else
{
writer.Write("CONSTRAINT ");
writer.Write(PgDiffStringExtension.QuoteName(newConstraint.Name));
writer.Write(" ON ");
writer.Write(PgDiffStringExtension.QuoteName(newConstraint.TableName));
}
writer.Write(" IS ");
writer.Write(newConstraint.Comment);
writer.WriteLine(';');
}
else if (oldConstraint.Comment != null && newConstraint.Comment == null)
{
searchPathHelper.OutputSearchPath(writer);
writer.WriteLine();
writer.Write("COMMENT ON ");
if (newConstraint.PrimaryKeyConstraint)
{
writer.Write("INDEX ");
writer.Write(PgDiffStringExtension.QuoteName(newConstraint.Name));
}
else
{
writer.Write("CONSTRAINT ");
writer.Write(PgDiffStringExtension.QuoteName(newConstraint.Name));
writer.Write(" ON ");
writer.Write(PgDiffStringExtension.QuoteName(newConstraint.TableName));
}
writer.WriteLine(" IS NULL;");
}
}
}
}
/// <summary>
/// Outputs statements for aggregate comments that have changed.
/// </summary>
public static void AlterComments(StreamWriter writer, [NullGuard.AllowNull] PgSchema oldSchema, PgSchema newSchema, SearchPathHelper searchPathHelper)
{
if (oldSchema == null)
{
return;
}
foreach (PgAggregate oldAggregate in oldSchema.Aggregates)
{
PgAggregate newAggregate = newSchema.GetAggregate(oldAggregate.Signature);
if (newAggregate == null)
{
continue;
}
if ((oldAggregate.Comment == null && newAggregate.Comment != null) ||
(oldAggregate.Comment != null && newAggregate.Comment != null && !oldAggregate.Comment.Equals(newAggregate.Comment)))
{
searchPathHelper.OutputSearchPath(writer);
writer.WriteLine();
writer.Write("COMMENT ON AGGREGATE ");
writer.Write(PgDiffStringExtension.QuoteName(newAggregate.Name));
writer.Write('(');
var addComma = false;
foreach (PgAggregate.Argument argument in newAggregate.Arguments)
{
if (addComma)
{
writer.Write(", ");
}
else
{
addComma = true;
}
writer.Write(argument.DataType);
}
writer.Write(") IS ");
writer.Write(newAggregate.Comment);
writer.WriteLine(';');
}
else if (oldAggregate.Comment != null && newAggregate.Comment == null)
{
searchPathHelper.OutputSearchPath(writer);
writer.WriteLine();
writer.Write("COMMENT ON AGGREGATE ");
writer.Write(PgDiffStringExtension.QuoteName(newAggregate.Name));
writer.Write('(');
var addComma = false;
foreach (PgAggregate.Argument argument in newAggregate.Arguments)
{
if (addComma)
{
writer.Write(", ");
}
else
{
addComma = true;
}
writer.Write(argument.DataType);
}
writer.WriteLine(") IS NULL;");
}
}
}
/// <summary>
/// Diffs default values in views.
/// </summary>
private static void DiffDefaultValues(StreamWriter writer, PgView oldView, PgView newView, SearchPathHelper searchPathHelper)
{
IList <PgView.DefaultValue> oldValues = oldView.DefaultValues;
IList <PgView.DefaultValue> newValues = newView.DefaultValues;
// modify defaults that are in old view
foreach (PgView.DefaultValue oldValue in oldValues)
{
var found = false;
foreach (PgView.DefaultValue newValue in newValues)
{
if (oldValue.ColumnName.Equals(newValue.ColumnName))
{
found = true;
if (!oldValue.Value.Equals(newValue.Value))
{
searchPathHelper.OutputSearchPath(writer);
writer.WriteLine();
writer.Write("ALTER TABLE ");
writer.Write(PgDiffStringExtension.QuoteName(newView.Name));
writer.Write(" ALTER COLUMN ");
writer.Write(PgDiffStringExtension.QuoteName(newValue.ColumnName));
writer.Write(" SET DEFAULT ");
writer.Write(newValue.Value);
writer.WriteLine(';');
}
break;
}
}
if (!found)
{
searchPathHelper.OutputSearchPath(writer);
writer.WriteLine();
writer.Write("ALTER TABLE ");
writer.Write(PgDiffStringExtension.QuoteName(newView.Name));
writer.Write(" ALTER COLUMN ");
writer.Write(PgDiffStringExtension.QuoteName(oldValue.ColumnName));
writer.WriteLine(" DROP DEFAULT;");
}
}
// add new defaults
foreach (PgView.DefaultValue newValue in newValues)
{
var found = false;
foreach (PgView.DefaultValue oldValue in oldValues)
{
if (newValue.ColumnName.Equals(oldValue.ColumnName))
{
found = true;
break;
}
}
if (found)
{
continue;
}
searchPathHelper.OutputSearchPath(writer);
writer.WriteLine();
writer.Write("ALTER TABLE ");
writer.Write(PgDiffStringExtension.QuoteName(newView.Name));
writer.Write(" ALTER COLUMN ");
writer.Write(PgDiffStringExtension.QuoteName(newValue.ColumnName));
writer.Write(" SET DEFAULT ");
writer.Write(newValue.Value);
writer.WriteLine(';');
}
}