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/*
* Copyright (c) 2009-2016, Data Geekery GmbH (http://www.datageekery.com)
* All rights reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
* Other licenses:
* -----------------------------------------------------------------------------
* Commercial licenses for this work are available. These replace the above
* ASL 2.0 and offer limited warranties, support, maintenance, and commercial
* database integrations.
*
* For more information, please visit: http://www.jooq.org/licenses
*
*
*
*
*
*
*
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*
*/
package org.jooq.impl;
import static java.util.Arrays.asList;
import static org.jooq.Clause.ALTER_TABLE;
import static org.jooq.Clause.ALTER_TABLE_ADD;
import static org.jooq.Clause.ALTER_TABLE_ALTER;
import static org.jooq.Clause.ALTER_TABLE_ALTER_DEFAULT;
import static org.jooq.Clause.ALTER_TABLE_DROP;
import static org.jooq.Clause.ALTER_TABLE_RENAME;
import static org.jooq.Clause.ALTER_TABLE_RENAME_COLUMN;
import static org.jooq.Clause.ALTER_TABLE_RENAME_CONSTRAINT;
import static org.jooq.Clause.ALTER_TABLE_TABLE;
import static org.jooq.SQLDialect.DERBY;
import static org.jooq.SQLDialect.FIREBIRD;
// ...
import static org.jooq.SQLDialect.HSQLDB;
// ...
import static org.jooq.impl.DSL.constraint;
import static org.jooq.impl.DSL.field;
import static org.jooq.impl.DSL.inline;
import static org.jooq.impl.DSL.name;
import static org.jooq.impl.DSL.sql;
import static org.jooq.impl.Tools.toSQLDDLTypeDeclaration;
import static org.jooq.impl.Tools.DataKey.DATA_CONSTRAINT_REFERENCE;
import org.jooq.AlterTableAlterStep;
import org.jooq.AlterTableDropStep;
import org.jooq.AlterTableFinalStep;
import org.jooq.AlterTableRenameColumnToStep;
import org.jooq.AlterTableRenameConstraintToStep;
import org.jooq.AlterTableStep;
import org.jooq.AlterTableUsingIndexStep;
import org.jooq.Clause;
import org.jooq.Configuration;
import org.jooq.Constraint;
import org.jooq.Context;
import org.jooq.DSLContext;
import org.jooq.DataType;
import org.jooq.Field;
import org.jooq.Name;
import org.jooq.SQLDialect;
import org.jooq.Table;
/**
* @author Lukas Eder
*/
@SuppressWarnings({ "rawtypes", "unchecked" })
final class AlterTableImpl extends AbstractQuery implements
// Cascading interface implementations for ALTER TABLE behaviour
AlterTableStep,
AlterTableDropStep,
AlterTableAlterStep,
AlterTableUsingIndexStep,
AlterTableRenameColumnToStep,
AlterTableRenameConstraintToStep {
/**
* Generated UID
*/
private static final long serialVersionUID = 8904572826501186329L;
private static final Clause[] CLAUSES = { ALTER_TABLE };
private final Table table;
private final boolean ifExists;
private Table renameTo;
private Field renameColumn;
private Field renameColumnTo;
private Constraint renameConstraint;
private Constraint renameConstraintTo;
private Field addColumn;
private DataType addColumnType;
private Constraint addConstraint;
private Field alterColumn;
private DataType alterColumnType;
private Field alterColumnDefault;
private Field dropColumn;
private boolean dropColumnCascade;
private Constraint dropConstraint;
AlterTableImpl(Configuration configuration, Table table) {
this(configuration, table, false);
}
AlterTableImpl(Configuration configuration, Table table, boolean ifExists) {
super(configuration);
this.table = table;
this.ifExists = ifExists;
}
// ------------------------------------------------------------------------
// XXX: DSL API
// ------------------------------------------------------------------------
@Override
public final AlterTableImpl renameTo(Table newName) {
this.renameTo = newName;
return this;
}
@Override
public final AlterTableImpl renameTo(Name newName) {
return renameTo(DSL.table(newName));
}
@Override
public final AlterTableImpl renameTo(String newName) {
return renameTo(name(newName));
}
@Override
public final AlterTableImpl renameColumn(Field oldName) {
renameColumn = oldName;
return this;
}
@Override
public final AlterTableImpl renameColumn(Name oldName) {
return renameColumn(field(oldName));
}
@Override
public final AlterTableImpl renameColumn(String oldName) {
return renameColumn(name(oldName));
}
@Override
public final AlterTableImpl renameConstraint(Constraint oldName) {
renameConstraint = oldName;
return this;
}
@Override
public final AlterTableImpl renameConstraint(Name oldName) {
return renameConstraint(constraint(oldName));
}
@Override
public final AlterTableImpl renameConstraint(String oldName) {
return renameConstraint(name(oldName));
}
@Override
public final AlterTableImpl to(Field newName) {
if (renameColumn != null)
renameColumnTo = newName;
else
throw new IllegalStateException();
return this;
}
@Override
public final AlterTableImpl to(Constraint newName) {
if (renameConstraint != null)
renameConstraintTo = newName;
else
throw new IllegalStateException();
return this;
}
@Override
public final AlterTableImpl to(Name newName) {
if (renameColumn != null)
return to(field(newName));
else if (renameConstraint != null)
return to(constraint(newName));
else
throw new IllegalStateException();
}
@Override
public final AlterTableImpl to(String newName) {
return to(name(newName));
}
@Override
public final AlterTableImpl add(Field field, DataType type) {
return addColumn(field, type);
}
@Override
public final AlterTableImpl add(Name field, DataType type) {
return addColumn(field, type);
}
@Override
public final AlterTableImpl add(String field, DataType type) {
return addColumn(field, type);
}
@Override
public final AlterTableImpl addColumn(String field, DataType type) {
return addColumn(name(field), type);
}
@Override
public final AlterTableImpl addColumn(Name field, DataType type) {
return addColumn((Field) field(field, type), type);
}
@Override
public final AlterTableImpl addColumn(Field field, DataType type) {
addColumn = field;
addColumnType = type;
return this;
}
@Override
public final AlterTableImpl add(Constraint constraint) {
addConstraint = constraint;
return this;
}
@Override
public final AlterTableImpl alter(Field field) {
return alterColumn(field);
}
@Override
public final AlterTableImpl alter(Name field) {
return alterColumn(field);
}
@Override
public final AlterTableImpl alter(String field) {
return alterColumn(field);
}
@Override
public final AlterTableImpl alterColumn(Name field) {
return alterColumn(field(field));
}
@Override
public final AlterTableImpl alterColumn(String field) {
return alterColumn(name(field));
}
@Override
public final AlterTableImpl alterColumn(Field field) {
alterColumn = field;
return this;
}
@Override
public final AlterTableImpl set(DataType type) {
alterColumnType = type;
return this;
}
@Override
public final AlterTableImpl defaultValue(Object literal) {
return defaultValue(Tools.field(literal));
}
@Override
public final AlterTableImpl defaultValue(Field expression) {
alterColumnDefault = expression;
return this;
}
@Override
public final AlterTableImpl drop(Field field) {
return dropColumn(field);
}
@Override
public final AlterTableImpl drop(Name field) {
return dropColumn(field);
}
@Override
public final AlterTableImpl drop(String field) {
return dropColumn(field);
}
@Override
public final AlterTableImpl dropColumn(Name field) {
return dropColumn(field(field));
}
@Override
public final AlterTableImpl dropColumn(String field) {
return dropColumn(name(field));
}
@Override
public final AlterTableImpl dropColumn(Field field) {
dropColumn = field;
return this;
}
@Override
public final AlterTableImpl drop(Constraint constraint) {
dropConstraint = constraint;
return this;
}
@Override
public final AlterTableImpl dropConstraint(Name constraint) {
return drop(DSL.constraint(constraint));
}
@Override
public final AlterTableImpl dropConstraint(String constraint) {
return drop(DSL.constraint(constraint));
}
@Override
public final AlterTableFinalStep cascade() {
dropColumnCascade = true;
return this;
}
@Override
public final AlterTableFinalStep restrict() {
dropColumnCascade = false;
return this;
}
// ------------------------------------------------------------------------
// XXX: QueryPart API
// ------------------------------------------------------------------------
@Override
public final void accept(Context ctx) {
SQLDialect family = ctx.configuration().dialect().family();
accept0(ctx);
}
private final void accept0(Context ctx) {
SQLDialect family = ctx.family();
boolean omitAlterTable =
family == HSQLDB && renameConstraint != null;
if (!omitAlterTable) {
ctx.start(ALTER_TABLE_TABLE)
.keyword("alter table");
if (ifExists)
ctx.sql(' ').keyword("if exists");
ctx.sql(' ').visit(table)
.end(ALTER_TABLE_TABLE)
.formatIndentStart()
.formatSeparator();
}
if (renameTo != null) {
boolean qualify = ctx.qualify();
ctx.start(ALTER_TABLE_RENAME)
.qualify(false)
.keyword("rename to").sql(' ')
.visit(renameTo)
.qualify(qualify)
.end(ALTER_TABLE_RENAME);
}
else if (renameColumn != null) {
boolean qualify = ctx.qualify();
ctx.start(ALTER_TABLE_RENAME_COLUMN)
.qualify(false);
switch (ctx.family()) {
case H2:
case HSQLDB:
ctx.keyword("alter column").sql(' ')
.visit(renameColumn)
.formatSeparator()
.keyword("rename to").sql(' ')
.visit(renameColumnTo);
break;
default:
ctx.keyword("rename column").sql(' ')
.visit(renameColumn)
.formatSeparator()
.keyword("to").sql(' ')
.visit(renameColumnTo);
break;
}
ctx.qualify(qualify)
.end(ALTER_TABLE_RENAME_COLUMN);
}
else if (renameConstraint != null) {
boolean qualify = ctx.qualify();
ctx.start(ALTER_TABLE_RENAME_CONSTRAINT);
ctx.data(DATA_CONSTRAINT_REFERENCE, true);
if (family == HSQLDB) {
ctx.qualify(false)
.keyword("alter constraint").sql(' ')
.visit(renameConstraint)
.formatSeparator()
.keyword("rename to").sql(' ')
.visit(renameConstraintTo)
.qualify(qualify);
}
else {
ctx.qualify(false)
.keyword("rename constraint").sql(' ')
.visit(renameConstraint)
.formatSeparator()
.keyword("to").sql(' ')
.visit(renameConstraintTo)
.qualify(qualify);
}
ctx.data().remove(DATA_CONSTRAINT_REFERENCE);
ctx.end(ALTER_TABLE_RENAME_CONSTRAINT);
}
else if (addColumn != null) {
boolean qualify = ctx.qualify();
ctx.start(ALTER_TABLE_ADD)
.keyword("add").sql(' ');
ctx.qualify(false)
.visit(addColumn).sql(' ')
.qualify(qualify);
toSQLDDLTypeDeclaration(ctx, addColumnType);
if (!addColumnType.nullable()) {
ctx.sql(' ').keyword("not null");
}
// Some databases default to NOT NULL, so explicitly setting columns to NULL is mostly required here
// [#3400] [#4321] ... but not in Derby, Firebird
else if (!asList(DERBY, FIREBIRD).contains(family)) {
ctx.sql(' ').keyword("null");
}
ctx.end(ALTER_TABLE_ADD);
}
else if (addConstraint != null) {
boolean qualify = ctx.qualify();
ctx.start(ALTER_TABLE_ADD);
ctx.keyword("add")
.sql(' ')
.qualify(false)
.visit(addConstraint)
.qualify(qualify);
ctx.end(ALTER_TABLE_ADD);
}
else if (alterColumn != null) {
ctx.start(ALTER_TABLE_ALTER);
switch (family) {
case CUBRID:
case MARIADB:
case MYSQL: {
if (alterColumnDefault == null) {
// MySQL's CHANGE COLUMN clause has a mandatory RENAMING syntax...
ctx.keyword("change column")
.sql(' ').qualify(false).visit(alterColumn).qualify(true);
}
else {
ctx.keyword("alter column");
}
break;
}
default:
ctx.keyword("alter");
break;
}
ctx.sql(' ')
.qualify(false)
.visit(alterColumn)
.qualify(true);
if (alterColumnType != null) {
switch (family) {
case DERBY:
ctx.sql(' ').keyword("set data type");
break;
case POSTGRES:
ctx.sql(' ').keyword("type");
break;
}
ctx.sql(' ');
toSQLDDLTypeDeclaration(ctx, alterColumnType);
if (!alterColumnType.nullable()) {
ctx.sql(' ').keyword("not null");
}
}
else if (alterColumnDefault != null) {
ctx.start(ALTER_TABLE_ALTER_DEFAULT);
switch (family) {
default:
ctx.keyword("set default");
break;
}
ctx.sql(' ').visit(alterColumnDefault)
.end(ALTER_TABLE_ALTER_DEFAULT);
}
ctx.end(ALTER_TABLE_ALTER);
}
else if (dropColumn != null) {
ctx.start(ALTER_TABLE_DROP);
switch (family) {
default:
ctx.keyword("drop");
break;
}
ctx.sql(' ')
.qualify(false)
.visit(dropColumn)
.qualify(true);
switch (family) {
default:
break;
}
if (dropColumnCascade) {
ctx.sql(' ').keyword("cascade");
}
ctx.end(ALTER_TABLE_DROP);
}
else if (dropConstraint != null) {
ctx.start(ALTER_TABLE_DROP);
ctx.data(DATA_CONSTRAINT_REFERENCE, true);
ctx.keyword("drop constraint")
.sql(' ')
.visit(dropConstraint);
ctx.data().remove(DATA_CONSTRAINT_REFERENCE);
ctx.end(ALTER_TABLE_DROP);
}
if (!omitAlterTable)
ctx.formatIndentEnd();
}
@Override
public final Clause[] clauses(Context ctx) {
return CLAUSES;
}
}