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[jOOQ/jOOQ#9557] Add support for ALTER TABLE .. DROP CONSTRAINT IF EXISTS

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- Added native support
This commit is contained in:
Lukas Eder 2019-11-18 11:22:23 +01:00
parent afac78a950
commit fa21941e6e
2 changed files with 69 additions and 6 deletions
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34
jOOQ/src/main/java/org/jooq/AlterTableStep.java
View File

@ -588,6 +588,40 @@ public interface AlterTableStep {
@Support({ CUBRID, DERBY, FIREBIRD, H2, HSQLDB, MARIADB, POSTGRES })
AlterTableDropStep dropConstraint(String constraint);
/**
* Add a <code>DROP CONSTRAINT IF EXISTS</code> clause to the <code>ALTER TABLE</code>
* statement.
*/
@Support({ H2, POSTGRES })
AlterTableDropStep dropIfExists(Constraint constraint);
/**
* Add a <code>DROP CONSTRAINT IF EXISTS</code> clause to the <code>ALTER TABLE</code>
* statement.
*
* @see DSL#constraint(String)
*/
@Support({ H2, POSTGRES })
AlterTableDropStep dropConstraintIfExists(Constraint constraint);
/**
* Add a <code>DROP CONSTRAINT IF EXISTS</code> clause to the <code>ALTER TABLE</code>
* statement.
*
* @see DSL#constraint(String)
*/
@Support({ H2, POSTGRES })
AlterTableDropStep dropConstraintIfExists(Name constraint);
/**
* Add a <code>DROP CONSTRAINT IF EXISTS</code> clause to the <code>ALTER TABLE</code>
* statement.
*
* @see DSL#constraint(String)
*/
@Support({ H2, POSTGRES })
AlterTableDropStep dropConstraintIfExists(String constraint);
/**
* Add a <code>DROP PRIMARY KEY</code> clause to the <code>ALTER TABLE</code>
* statement.

41
jOOQ/src/main/java/org/jooq/impl/AlterTableImpl.java
View File

@ -238,6 +238,7 @@ final class AlterTableImpl extends AbstractRowCountQuery implements
private final Table<?> table;
private final boolean ifExists;
private boolean ifExistsColumn;
private boolean ifExistsConstraint;
private boolean ifNotExistsColumn;
private Comment comment;
private Table<?> renameTo;
@ -282,6 +283,7 @@ final class AlterTableImpl extends AbstractRowCountQuery implements
final Table<?> $table() { return table; }
final boolean $ifExists() { return ifExists; }
final boolean $ifExistsColumn() { return ifExistsColumn; }
final boolean $ifExistsConstraint() { return ifExistsConstraint; }
final boolean $ifNotExistsColumn() { return ifNotExistsColumn; }
final Field<?> $addColumn() { return addColumn; }
final DataType<?> $addColumnType() { return addColumnType; }
@ -804,6 +806,27 @@ final class AlterTableImpl extends AbstractRowCountQuery implements
return dropConstraint(DSL.constraint(constraint));
}
@Override
public final AlterTableImpl dropIfExists(Constraint constraint) {
ifExistsConstraint = true;
return drop(constraint);
}
@Override
public final AlterTableImpl dropConstraintIfExists(Constraint constraint) {
return dropIfExists(constraint);
}
@Override
public final AlterTableImpl dropConstraintIfExists(Name constraint) {
return dropIfExists(constraint(constraint));
}
@Override
public final AlterTableImpl dropConstraintIfExists(String constraint) {
return dropIfExists(constraint(constraint));
}
@Override
public final AlterTableImpl dropPrimaryKey() {
dropConstraintType = PRIMARY_KEY;
@ -1542,16 +1565,22 @@ final class AlterTableImpl extends AbstractRowCountQuery implements
ctx.start(ALTER_TABLE_DROP);
ctx.data(DATA_CONSTRAINT_REFERENCE, true);
if (dropConstraintType == FOREIGN_KEY && NO_SUPPORT_DROP_CONSTRAINT.contains(family))
if (dropConstraintType == FOREIGN_KEY && NO_SUPPORT_DROP_CONSTRAINT.contains(family)) {
ctx.visit(K_DROP).sql(' ').visit(K_FOREIGN_KEY)
.sql(' ')
.visit(dropConstraint);
else if (dropConstraintType == PRIMARY_KEY && NO_SUPPORT_DROP_CONSTRAINT.contains(family))
}
else if (dropConstraintType == PRIMARY_KEY && NO_SUPPORT_DROP_CONSTRAINT.contains(family)) {
ctx.visit(K_DROP).sql(' ').visit(K_PRIMARY_KEY);
else
ctx.visit(K_DROP_CONSTRAINT)
.sql(' ')
.visit(dropConstraint);
}
else {
ctx.visit(K_DROP_CONSTRAINT).sql(' ');
if (ifExistsConstraint)
ctx.visit(K_IF_EXISTS).sql(' ');
ctx.visit(dropConstraint);
}
acceptCascade(ctx);