//ALTER TABLE employees DROP COLUMN "employee_num";
public override void BuildColumnDropSql(DbObjectChange change, DbColumnInfo column)
{
if(!string.IsNullOrEmpty(column.DefaultExpression))
change.AddScript(DbScriptType.ColumnModify, "ALTER TABLE {0} DROP CONSTRAINT \"{1}\";", column.Table.FullName, column.DefaultConstraintName);
//Note: the column drop comes after table-rename, so it might be table is already renamed, and we have to get its new name
var tableName = column.Table.Peer.FullName; //new name if renamed
change.AddScript(DbScriptType.ColumnDrop, "ALTER TABLE {0} DROP COLUMN \"{1}\";", tableName, column.ColumnName);
}
public override void BuildCustomTypeAddSql(DbObjectChange change, DbCustomTypeInfo typeInfo)
{
var sqlCreateTemplate = "CREATE TYPE {0} AS TABLE ([Value] Sql_Variant);";
var sqlGrantTemplate = "Grant EXECUTE on TYPE::{0} to {1};";
change.AddScript(DbScriptType.CustomTypeAdd, sqlCreateTemplate, typeInfo.FullName);
if (!string.IsNullOrWhiteSpace(Settings.GrantExecReadToRole))
change.AddScript(DbScriptType.CustomTypeAdd, sqlGrantTemplate, typeInfo.FullName, Settings.GrantExecReadToRole);
if (!string.IsNullOrWhiteSpace(Settings.GrantExecWriteToRole) && Settings.GrantExecWriteToRole != Settings.GrantExecReadToRole)
change.AddScript(DbScriptType.CustomTypeAdd, sqlGrantTemplate, typeInfo.FullName, Settings.GrantExecWriteToRole);
}
public override void BuildColumnModifySql(DbObjectChange change, DbColumnInfo column, DbScriptOptions options = DbScriptOptions.None)
{
if(ShouldResetNullsToDefault(column))
BuildColumnSetDefaultValuesSql(change, column);
// In Pg you modify column one aspect at a time; setting TYPE and Nullable requires 2 calls
change.AddScript(DbScriptType.ColumnModify, "ALTER TABLE {0} ALTER COLUMN \"{1}\" TYPE {2};",
column.Table.FullName, column.ColumnName, column.TypeInfo.SqlTypeSpec);
var nullStr = column.Flags.IsSet(DbColumnFlags.Nullable) ? "DROP NOT NULL" : "SET NOT NULL";
change.AddScript(DbScriptType.ColumnSetupComplete, "ALTER TABLE {0} ALTER COLUMN \"{1}\" {2};",
column.Table.FullName, column.ColumnName, nullStr);
}
public override void BuildPrimaryKeyAddSql(DbObjectChange change, DbKeyInfo key)
{
// PK for Identity (Auto-increment) columns is created when table/ID columns is created
if(key.KeyColumns[0].Column.Flags.IsSet(DbColumnFlags.Identity)) {
change.AddScript(DbScriptType.PrimaryKeyAdd, "-- PrimaryKeyAdd empty action");
return;
}
var fullTableRef = key.Table.FullName;
var pkFields = key.KeyColumns.GetSqlNameList();
// PK name is always 'PRIMARY'
change.AddScript(DbScriptType.PrimaryKeyAdd, "ALTER TABLE {0} ADD CONSTRAINT PRIMARY KEY ({1});", fullTableRef, pkFields);
}
public override void BuildColumnModifySql(DbObjectChange change, DbColumnInfo column, DbScriptOptions options = DbScriptOptions.None)
{
var colSpec = GetColumnSpec(column, options);
var tbl = column.Table;
var scriptType = options.IsSet(DbScriptOptions.CompleteColumnSetup) ? DbScriptType.ColumnSetupComplete : DbScriptType.ColumnModify;
change.AddScript(scriptType, "ALTER TABLE {0} MODIFY COLUMN {1};", tbl.FullName, colSpec);
}
//not supported; all we can do is nullify it; so if it is a FK it no longer holds target refs
public override void BuildColumnDropSql(DbObjectChange change, DbColumnInfo column)
{
//Note: the column drop comes after table-rename, so it might be table is already renamed, and we have to get its new name
var tableName = column.Table.Peer.FullName; //new name if renamed
if (column.Flags.IsSet(DbColumnFlags.Nullable) && column.Flags.IsSet(DbColumnFlags.ForeignKey)) {
change.AddScript(DbScriptType.ColumnInit, "UPDATE {0} SET \"{1}\" = NULL;", tableName, column.ColumnName);
}
}
public override void BuildStoredProcDropSql(DbObjectChange change, DbCommandInfo command)
{
if(command.CustomTag == null) { //try to recover it
var inpParams = command.Parameters.Where(p => p.Direction != ParameterDirection.Output);
command.CustomTag = string.Join(", ", inpParams.Select(p => p.TypeInfo.SqlTypeSpec));
}
var funcRef = string.Format(@"{0}.""{1}""({2})", command.Schema, command.CommandName, command.CustomTag);
change.AddScript(DbScriptType.RoutineDrop, "DROP FUNCTION {0};", funcRef);
}
//ALTER TABLE employees ALTER COLUMN [employee_name] nvarchar(100) Null;
public virtual void BuildColumnModifySql(DbObjectChange change, DbColumnInfo column, DbScriptOptions options = DbScriptOptions.None)
{
var scriptType = options.IsSet(DbScriptOptions.CompleteColumnSetup) ? DbScriptType.ColumnSetupComplete : DbScriptType.ColumnModify;
if(ShouldResetNullsToDefault(column)) {
BuildColumnSetDefaultValuesSql(change, column);
scriptType = DbScriptType.ColumnSetupComplete;
}
var colSpec = GetColumnSpec(column);
change.AddScript(scriptType,
"ALTER TABLE {0} ALTER COLUMN {1};", column.Table.FullName, colSpec);
}
public override void BuildColumnAddSql(DbObjectChange change, DbColumnInfo column, DbScriptOptions options)
{
var colSpec = GetColumnSpec(column, options);
if(!column.Flags.IsSet(DbColumnFlags.Nullable)) {
var dft = column.TypeInfo.VendorDbType.DefaultColumnInit;
if (string.IsNullOrWhiteSpace(dft))
dft = column.TypeInfo.ToLiteral(new byte[] {0});
colSpec += " DEFAULT " + dft;
}
//workaround for unit test with renaming table - ignore rename, use old table
var tbl = column.Table;
if (tbl.Peer != null)
tbl = tbl.Peer; //use old table name
change.AddScript(DbScriptType.ColumnAdd, "ALTER TABLE {0} ADD {1};", tbl.FullName, colSpec);
}
public override void BuildIndexDropSql(DbObjectChange change, DbKeyInfo key)
{
change.AddScript(DbScriptType.IndexDrop, "DROP INDEX \"{0}\".\"{1}\";", key.Table.Schema, key.Name);
}
public override void BuildColumnRenameSql(DbObjectChange change, DbColumnInfo oldColumn, DbColumnInfo newColumn)
{
change.AddScript(DbScriptType.ColumnRename, "ALTER TABLE {0} RENAME COLUMN \"{1}\" TO \"{2}\";", newColumn.Table.FullName, oldColumn.ColumnName, newColumn.ColumnName);
}
public virtual void BuildTableAddSql(DbObjectChange change, DbTableInfo table)
{
const string SqlTemplate = @"CREATE TABLE {0} (" + "\r\n {1} \r\n); ";
var specs = table.Columns.Select(c => GetColumnSpec(c));
var columnSpecs = string.Join("," + Environment.NewLine, specs);
change.AddScript(DbScriptType.TableAdd, SqlTemplate, table.FullName, columnSpecs);
}
public override void BuildViewDropSql(DbObjectChange change, DbTableInfo view)
{
var matzed = view.IsMaterializedView ? "MATERIALIZED" : string.Empty;
change.AddScript(DbScriptType.ViewDrop, "DROP {0} VIEW {1};", matzed, view.FullName);
//base.BuildViewDropSql(change, view);
}
public virtual void BuildTableRenameSql(DbObjectChange change, DbTableInfo oldTable, DbTableInfo newTable)
{
//Syntax for MySql and almost like Postgres
change.AddScript(DbScriptType.TableRename, "ALTER TABLE {0} RENAME TO \"{1}\" ;", oldTable.FullName, newTable.FullName);
}
public override void BuildTableRenameSql(DbObjectChange change, DbTableInfo oldTable, DbTableInfo newTable)
{
change.AddScript(DbScriptType.TableRename, "ALTER TABLE {0} RENAME TO \"{1}\" ;", oldTable.FullName, newTable.TableName);
}
public override void BuildSequenceDropSql(DbObjectChange change, DbSequenceInfo sequence)
{
// PG creates sequences for identity columns, these should not be dropped explicitly; we do sequence drop after table drop, so we add check for existense
change.AddScript(DbScriptType.SequenceDrop, "DROP SEQUENCE IF EXISTS {0}", sequence.FullName);
}
public virtual void BuildColumnSetDefaultValuesSql(DbObjectChange change, DbColumnInfo column)
{
var fullTableRef = column.Table.FullName;
change.AddScript(DbScriptType.ColumnInit, "UPDATE {0} SET \"{1}\" = {2} WHERE \"{1}\" IS NULL;",
fullTableRef, column.ColumnName, column.TypeInfo.InitExpression);
}
public virtual void BuildTableConstraintDropSql(DbObjectChange change, DbKeyInfo key)
{
change.AddScript(DbScriptType.TableConstraintDrop, "ALTER TABLE {0} DROP CONSTRAINT \"{1}\";", key.Table.FullName, key.Name);
}
//ALTER TABLE employees DROP COLUMN [employee_pwd];
public virtual void BuildColumnDropSql(DbObjectChange change, DbColumnInfo column)
{
//Note: the column drop comes after table-rename, so it might be table is already renamed, and we have to get its new name
var tableName = column.Table.Peer.FullName; //new name if renamed
change.AddScript(DbScriptType.ColumnDrop, "ALTER TABLE {0} DROP COLUMN \"{1}\"", tableName, column.ColumnName);
}
//Helper methods
protected virtual void BuildColumnRenameSqlWithAddDrop(DbObjectChange change, DbColumnInfo oldColumn, DbColumnInfo newColumn)
{
//Add new column
BuildColumnAddSql(change, newColumn, DbScriptOptions.ForceNull);
// copy data
change.AddScript(DbScriptType.ColumnCopyValues,
"UPDATE {0} SET \"{1}\" = \"{2}\";", oldColumn.Table.FullName, newColumn.ColumnName, oldColumn.ColumnName);
// finalize added column
BuildColumnModifySql(change, newColumn, DbScriptOptions.CompleteColumnSetup);
//drop old column
BuildColumnDropSql(change, oldColumn);
}
// ALTER TABLE employees ADD [employee_pwd] nvarchar(20) Null;
// All columns are added as nullable, to allow for existing rows be filled with nulls
// Then extra step columnInit sets default values for types (zeros), and then column is modified to NOT NULL
public virtual void BuildColumnAddSql(DbObjectChange change, DbColumnInfo column, DbScriptOptions options)
{
var colSpec = GetColumnSpec(column, options);
change.AddScript(DbScriptType.ColumnAdd, "ALTER TABLE {0} ADD {1};", column.Table.FullName, colSpec);
}
public virtual void BuildViewDropSql(DbObjectChange change, DbTableInfo view)
{
change.AddScript(DbScriptType.ViewDrop, "DROP VIEW {0}", view.FullName);
}
public virtual void BuildViewAddSql(DbObjectChange change, DbTableInfo view)
{
const string sqlTemplate =
@"CREATE VIEW {0} AS
{1}"; //no ';' at the end, SQL must have it already
change.AddScript(DbScriptType.ViewAdd, sqlTemplate, view.FullName, view.ViewSql);
}
public override void BuildPrimaryKeyAddSql(DbObjectChange change, DbKeyInfo key)
{
base.BuildPrimaryKeyAddSql(change, key);
if(key.KeyType.IsSet(KeyType.Clustered))
change.AddScript(DbScriptType.PrimaryKeyAdd, "ALTER TABLE {0} CLUSTER ON \"{1}\";", key.Table.FullName, key.Name);
}
public override void BuildSequenceAddSql(DbObjectChange change, DbSequenceInfo sequence)
{
var start = (sequence.StartValue < 1) ? 1 : sequence.StartValue;
const string sqlTemplate = "CREATE Sequence {0} START WITH {1} INCREMENT BY {2};";
change.AddScript(DbScriptType.SequenceAdd, sqlTemplate, sequence.FullName, start, sequence.Increment);
}
public virtual void BuildDatabaseAddSql(DbObjectChange change, string name)
{
change.AddScript(DbScriptType.DatabaseAdd, "CREATE DATABASE \"{0}\"", name);
}
//Dropping objects -----------------------------------------------------------------------------------------------------
public virtual void BuildDatabaseDropSql(DbObjectChange change, string name)
{
change.AddScript(DbScriptType.DatabaseDrop, "DROP DATABASE \"{0}\";", name);
}
public virtual void BuildIndexAddSql(DbObjectChange change, DbKeyInfo key)
{
const string CreateIndexTemplate = @"
CREATE {0} INDEX {1}
ON {2} ( {3} )
{4}
{5}
";
var driver = this.Settings.Driver;
var unique = key.KeyType.IsSet(KeyType.Unique) ? "UNIQUE" : string.Empty;
string indexFields;
if(driver.Supports(DbFeatures.OrderedColumnsInIndexes))
indexFields = key.KeyColumns.GetSqlNameListWithOrderSpec();
else
indexFields = key.KeyColumns.GetSqlNameList();
var qKeyName = '"' + key.Name + '"';
string includeList = string.Empty;
if(key.IncludeColumns.Count > 0 && driver.Supports(DbFeatures.IncludeColumnsInIndexes))
includeList = "INCLUDE (" + key.IncludeColumns.GetSqlNameList() + ")";
string wherePred = string.Empty;
if(!string.IsNullOrWhiteSpace(key.Filter) && driver.Supports(DbFeatures.FilterInIndexes))
wherePred = "WHERE " + key.Filter;
change.AddScript(DbScriptType.IndexAdd, CreateIndexTemplate, unique, qKeyName, key.Table.FullName, indexFields, includeList, wherePred);
}
public override void BuildViewAddSql(DbObjectChange change, DbTableInfo view)
{
const string createViewTemplate =
@"CREATE {0} VIEW {1} AS
{2};
COMMENT ON {0} VIEW {1} IS '{3}';
"; //notice - no ';' at the end, SQL must have it already
// For indexed views add 'MATERIALIZED' attribute
var matz = view.IsMaterializedView ? "MATERIALIZED" : string.Empty;
//var escapedSql = view.ViewSql.Replace("'", "''");
change.AddScript(DbScriptType.ViewAdd, createViewTemplate, matz, view.FullName, view.ViewSql, view.ViewHash);
}
public virtual void BuildTableDropSql(DbObjectChange change, DbTableInfo table)
{
change.AddScript(DbScriptType.TableDrop, "DROP TABLE {0}", table.FullName);
}
