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package org.jooq;

import org.jetbrains.annotations.*;


// ...
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import static org.jooq.SQLDialect.CUBRID;
// ...
import static org.jooq.SQLDialect.DERBY;
import static org.jooq.SQLDialect.FIREBIRD;
// ...
import static org.jooq.SQLDialect.H2;
// ...
import static org.jooq.SQLDialect.HSQLDB;
// ...
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import static org.jooq.SQLDialect.MARIADB;
// ...
import static org.jooq.SQLDialect.MYSQL;
// ...
import static org.jooq.SQLDialect.POSTGRES;
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The step in the ALTER TABLE DSL used to ALTER
columns.

Referencing XYZ*Step types directly from client code

It is usually not recommended to reference any XYZ*Step types
directly from client code, or assign them to local variables. When writing
dynamic SQL, creating a statement's components dynamically, and passing them
to the DSL API statically is usually a better choice. See the manual's
section about dynamic SQL for details: https://www.jooq.org/doc/latest/manual/sql-building/dynamic-sql.

Drawbacks of referencing the XYZ*Step types directly:

They're operating on mutable implementations (as of jOOQ 3.x)
They're less composable and not easy to get right when dynamic SQL gets
complex
They're less readable
They might have binary incompatible changes between minor releases

Author:
Lukas Eder/**
 * The step in the <code>ALTER TABLE</code> DSL used to <code>ALTER</code>
 * columns.
 * <p>
 * <h3>Referencing <code>XYZ*Step</code> types directly from client code</h3>
 * <p>
 * It is usually not recommended to reference any <code>XYZ*Step</code> types
 * directly from client code, or assign them to local variables. When writing
 * dynamic SQL, creating a statement's components dynamically, and passing them
 * to the DSL API statically is usually a better choice. See the manual's
 * section about dynamic SQL for details: <a href=
 * "https://www.jooq.org/doc/latest/manual/sql-building/dynamic-sql">https://www.jooq.org/doc/latest/manual/sql-building/dynamic-sql</a>.
 * <p>
 * Drawbacks of referencing the <code>XYZ*Step</code> types directly:
 * <ul>
 * <li>They're operating on mutable implementations (as of jOOQ 3.x)</li>
 * <li>They're less composable and not easy to get right when dynamic SQL gets
 * complex</li>
 * <li>They're less readable</li>
 * <li>They might have binary incompatible changes between minor releases</li>
 * </ul>
 *
 * @author Lukas Eder
 */
public interface AlterTableAlterStep<T> {

    
Specify a new column DEFAULT.
 This is an alias for default_(Object). /**
     * Specify a new column <code>DEFAULT</code>.
     * <p>
     * This is an alias for {@link #default_(Object)}.
     */
    @NotNull
    @Support({ CUBRID, DERBY, FIREBIRD, H2, HSQLDB, MARIADB, MYSQL, POSTGRES })
    AlterTableFinalStep defaultValue(T literal);

    
Specify a new column DEFAULT.
 This is an alias for default_(Field). /**
     * Specify a new column <code>DEFAULT</code>.
     * <p>
     * This is an alias for {@link #default_(Field)}.
     */
    @NotNull
    @Support({ CUBRID, DERBY, FIREBIRD, H2, HSQLDB, MARIADB, MYSQL, POSTGRES })
    AlterTableFinalStep defaultValue(Field<T> expression);

    
Specify a new column DEFAULT.
/**
     * Specify a new column <code>DEFAULT</code>.
     */
    @NotNull
    @Support({ CUBRID, DERBY, FIREBIRD, H2, HSQLDB, MARIADB, MYSQL, POSTGRES })
    AlterTableFinalStep default_(T literal);

    
Specify a new column DEFAULT.
/**
     * Specify a new column <code>DEFAULT</code>.
     */
    @NotNull
    @Support({ CUBRID, DERBY, FIREBIRD, H2, HSQLDB, MARIADB, MYSQL, POSTGRES })
    AlterTableFinalStep default_(Field<T> expression);

    
Specify a new column DEFAULT.
/**
     * Specify a new column <code>DEFAULT</code>.
     */
    @NotNull
    @Support({ CUBRID, DERBY, FIREBIRD, H2, HSQLDB, MARIADB, MYSQL, POSTGRES })
    AlterTableFinalStep setDefault(T literal);

    
Specify a new column DEFAULT.
/**
     * Specify a new column <code>DEFAULT</code>.
     */
    @NotNull
    @Support({ CUBRID, DERBY, FIREBIRD, H2, HSQLDB, MARIADB, MYSQL, POSTGRES })
    AlterTableFinalStep setDefault(Field<T> expression);

    
Drop the column DEFAULT.
/**
     * Drop the column <code>DEFAULT</code>.
     */
    @NotNull
    @Support({ CUBRID, DERBY, FIREBIRD, H2, HSQLDB, MARIADB, MYSQL, POSTGRES })
    AlterTableFinalStep dropDefault();

    
Specify a new column data type.

This adds or removes NOT NULL constraints on the column if DataType.nullable() is specified explicitly (not all databases support this). /**
     * Specify a new column data type.
     * <p>
     * This adds or removes <code>NOT NULL</code> constraints on the column if
     * {@link DataType#nullable()} is specified explicitly (not all databases
     * support this).
     */
    @NotNull
    @Support({ CUBRID, DERBY, FIREBIRD, H2, HSQLDB, MARIADB, MYSQL, POSTGRES })
    AlterTableFinalStep set(DataType<?> type);

    
Make the column NOT NULL.
/**
     * Make the column <code>NOT NULL</code>.
     */
    @NotNull
    @Support({ DERBY, FIREBIRD, H2, HSQLDB, POSTGRES })
    AlterTableFinalStep setNotNull();

    
Make the column nullable.
/**
     * Make the column nullable.
     */
    @NotNull
    @Support({ DERBY, FIREBIRD, H2, HSQLDB, POSTGRES })
    AlterTableFinalStep dropNotNull();
}