/**
* Builds the DDL SQL to alter a table
* based on a TableDiff instance
*
* @return string
*/
public function getModifyTableColumnsDDL(TableDiff $tableDiff)
{
$ret = '';
foreach ($tableDiff->getRemovedColumns() as $column) {
$ret .= $this->getRemoveColumnDDL($column);
}
foreach ($tableDiff->getRenamedColumns() as $columnRenaming) {
$ret .= $this->getRenameColumnDDL($columnRenaming[0], $columnRenaming[1]);
}
if ($modifiedColumns = $tableDiff->getModifiedColumns()) {
$ret .= $this->getModifyColumnsDDL($modifiedColumns);
}
if ($addedColumns = $tableDiff->getAddedColumns()) {
$ret .= $this->getAddColumnsDDL($addedColumns);
}
return $ret;
}
/**
* Creates a temporarily created table with the new schema,
* moves all items into it and drops the origin as well as renames the temp table to the origin then.
*
* @param TableDiff $tableDiff
* @return string
*/
public function getMigrationTableDDL(TableDiff $tableDiff)
{
$pattern = "\nCREATE TEMPORARY TABLE %s AS SELECT %s FROM %s;\nDROP TABLE %s;\n%s\nINSERT INTO %s (%s) SELECT %s FROM %s;\nDROP TABLE %s;\n";
$originTable = clone $tableDiff->getFromTable();
$newTable = clone $tableDiff->getToTable();
$originTableName = $originTable->getName();
$tempTableName = $newTable->getCommonName() . '__temp__' . uniqid();
$originTableFields = $this->getColumnListDDL($originTable->getColumns());
$fieldMap = [];
/** struct: [<oldCol> => <newCol>] */
//start with modified columns
foreach ($tableDiff->getModifiedColumns() as $diff) {
$fieldMap[$diff->getFromColumn()->getName()] = $diff->getToColumn()->getName();
}
foreach ($tableDiff->getRenamedColumns() as $col) {
list($from, $to) = $col;
$fieldMap[$from->getName()] = $to->getName();
}
foreach ($newTable->getColumns() as $col) {
if ($originTable->hasColumn($col)) {
if (!isset($fieldMap[$col->getName()])) {
$fieldMap[$col->getName()] = $col->getName();
}
}
}
$createTable = $this->getAddTableDDL($newTable);
$createTable .= $this->getAddIndicesDDL($newTable);
$sql = sprintf($pattern, $this->quoteIdentifier($tempTableName), $originTableFields, $this->quoteIdentifier($originTableName), $this->quoteIdentifier($originTableName), $createTable, $this->quoteIdentifier($originTableName), implode(', ', $fieldMap), implode(', ', array_keys($fieldMap)), $this->quoteIdentifier($tempTableName), $this->quoteIdentifier($tempTableName));
return $sql;
}
public function getModifyTableDDL(TableDiff $tableDiff)
{
$alterTableStatements = '';
$toTable = $tableDiff->getToTable();
// drop indices, foreign keys
foreach ($tableDiff->getRemovedFks() as $fk) {
$alterTableStatements .= $this->getDropForeignKeyDDL($fk);
}
foreach ($tableDiff->getModifiedFks() as $fkModification) {
list($fromFk) = $fkModification;
$alterTableStatements .= $this->getDropForeignKeyDDL($fromFk);
}
foreach ($tableDiff->getRemovedIndices() as $index) {
$alterTableStatements .= $this->getDropIndexDDL($index);
}
foreach ($tableDiff->getModifiedIndices() as $indexModification) {
list($fromIndex) = $indexModification;
$alterTableStatements .= $this->getDropIndexDDL($fromIndex);
}
// alter table structure
if ($tableDiff->hasModifiedPk()) {
$alterTableStatements .= $this->getDropPrimaryKeyDDL($tableDiff->getFromTable());
}
foreach ($tableDiff->getRenamedColumns() as $columnRenaming) {
$alterTableStatements .= $this->getRenameColumnDDL($columnRenaming[0], $columnRenaming[1]);
}
if ($modifiedColumns = $tableDiff->getModifiedColumns()) {
$alterTableStatements .= $this->getModifyColumnsDDL($modifiedColumns);
}
if ($addedColumns = $tableDiff->getAddedColumns()) {
$alterTableStatements .= $this->getAddColumnsDDL($addedColumns);
}
foreach ($tableDiff->getRemovedColumns() as $column) {
$alterTableStatements .= $this->getRemoveColumnDDL($column);
}
// add new indices and foreign keys
if ($tableDiff->hasModifiedPk()) {
$alterTableStatements .= $this->getAddPrimaryKeyDDL($tableDiff->getToTable());
}
// create indices, foreign keys
foreach ($tableDiff->getModifiedIndices() as $indexModification) {
list($oldIndex, $toIndex) = $indexModification;
$alterTableStatements .= $this->getAddIndexDDL($toIndex);
}
foreach ($tableDiff->getAddedIndices() as $index) {
$alterTableStatements .= $this->getAddIndexDDL($index);
}
foreach ($tableDiff->getModifiedFks() as $fkModification) {
list(, $toFk) = $fkModification;
$alterTableStatements .= $this->getAddForeignKeyDDL($toFk);
}
foreach ($tableDiff->getAddedFks() as $fk) {
$alterTableStatements .= $this->getAddForeignKeyDDL($fk);
}
$ret = '';
if (trim($alterTableStatements)) {
//merge all changes into one command. This prevents https://github.com/propelorm/Propel2/issues/1115
$changes = explode(';', $alterTableStatements);
$changeFragments = [];
foreach ($changes as $change) {
if (trim($change)) {
$changeFragments[] = preg_replace(sprintf('/ALTER TABLE %s /', $this->quoteIdentifier($toTable->getName())), "\n\n ", trim($change));
}
}
$ret .= sprintf("\nALTER TABLE %s%s;\n", $this->quoteIdentifier($toTable->getName()), implode(',', $changeFragments));
}
return $ret;
}
