migrations

type CallbackFn func(int64)

type CheckConstraint struct {
	// Constraint expression
	Constraint string `json:"constraint"`

	// Name of check constraint
	Name string `json:"name"`
}

type CheckConstraintError struct {
	Table  string
	Column string
	Err    error
}

type Column struct {
	// Check constraint for the column
	Check *CheckConstraint `json:"check,omitempty"`

	// Default value for the column
	Default *string `json:"default,omitempty"`

	// Name of the column
	Name string `json:"name"`

	// Indicates if the column is nullable
	Nullable bool `json:"nullable"`

	// Indicates if the column is part of the primary key
	Pk bool `json:"pk"`

	// Foreign key constraint for the column
	References *ForeignKeyReference `json:"references,omitempty"`

	// Postgres type of the column
	Type string `json:"type"`

	// Indicates if the column values must be unique
	Unique bool `json:"unique"`
}

type ColumnAlreadyExistsError struct {
	Table string
	Name  string
}

type ColumnDoesNotExistError struct {
	Table string
	Name  string
}

type ColumnIsNotNullableError struct {
	Table string
	Name  string
}

type ColumnReferenceError struct {
	Table  string
	Column string
	Err    error
}

type EmptyMigrationError struct{}

type FieldRequiredError struct {
	Name string
}

type ForeignKeyReference struct {
	// Name of the referenced column
	Column string `json:"column"`

	// Name of the foreign key constraint
	Name string `json:"name"`

	// Name of the referenced table
	Table string `json:"table"`
}

type IndexAlreadyExistsError struct {
	Name string
}

type IndexDoesNotExistError struct {
	Name string
}

type InvalidMigrationError struct {
	Reason string
}

type InvalidPrimaryKeyError struct {
	Table  string
	Fields int
}

type InvalidReplicaIdentityError struct {
	Table    string
	Identity string
}

type IsolatedOperation interface {
	IsIsolated()
}

type Migration struct {
	Name string `json:"name"`

	Operations Operations `json:"operations"`
}

type MultipleAlterColumnChangesError struct {
	Changes int
}

type NoDownSQLAllowedError struct{}

type NoUpSQLAllowedError struct{}

type OpAddColumn struct {
	// Column to add
	Column Column `json:"column"`

	// Name of the table
	Table string `json:"table"`

	// SQL expression for up migration
	Up *string `json:"up,omitempty"`
}

type OpAlterColumn struct {
	// Add check constraint to the column
	Check *CheckConstraint `json:"check,omitempty"`

	// Name of the column
	Column string `json:"column"`

	// SQL expression for down migration
	Down string `json:"down"`

	// New name of the column (for rename column operation)
	Name string `json:"name"`

	// Indicates if the column is nullable (for add not null constraint operation)
	Nullable *bool `json:"nullable,omitempty"`

	// Add foreign key constraint to the column
	References *ForeignKeyReference `json:"references,omitempty"`

	// Name of the table
	Table string `json:"table"`

	// New type of the column (for change type operation)
	Type string `json:"type"`

	// Add unique constraint to the column
	Unique *UniqueConstraint `json:"unique,omitempty"`

	// SQL expression for up migration
	Up string `json:"up"`
}

type OpChangeType struct {
	Table  string `json:"table"`
	Column string `json:"column"`
	Type   string `json:"type"`
	Up     string `json:"up"`
	Down   string `json:"down"`
}

type OpCreateIndex struct {
	// Names of columns on which to define the index
	Columns []string `json:"columns"`

	// Index name
	Name string `json:"name"`

	// Name of table on which to define the index
	Table string `json:"table"`
}

type OpCreateTable struct {
	// Columns corresponds to the JSON schema field "columns".
	Columns []Column `json:"columns"`

	// Name of the table
	Name string `json:"name"`
}

type OpDropColumn struct {
	// Name of the column
	Column string `json:"column"`

	// SQL expression for down migration
	Down *string `json:"down,omitempty"`

	// Name of the table
	Table string `json:"table"`
}

type OpDropConstraint struct {
	// Name of the column
	Column string `json:"column"`

	// SQL expression for down migration
	Down string `json:"down"`

	// Name of the constraint
	Name string `json:"name"`

	// Name of the table
	Table string `json:"table"`

	// SQL expression for up migration
	Up string `json:"up"`
}

type OpDropIndex struct {
	// Index name
	Name string `json:"name"`
}

type OpDropTable struct {
	// Name of the table
	Name string `json:"name"`
}

type OpName string

type OpRawSQL struct {
	// SQL expression for down migration
	Down string `json:"down,omitempty"`

	// SQL expression for up migration
	Up string `json:"up"`
}

type OpRenameColumn struct {
	Table string `json:"table"`
	From  string `json:"from"`
	To    string `json:"to"`
}

type OpRenameTable struct {
	// Old name of the table
	From string `json:"from"`

	// New name of the table
	To string `json:"to"`
}

type OpSetCheckConstraint struct {
	Table  string          `json:"table"`
	Column string          `json:"column"`
	Check  CheckConstraint `json:"check"`
	Up     string          `json:"up"`
	Down   string          `json:"down"`
}

type OpSetForeignKey struct {
	Table      string              `json:"table"`
	Column     string              `json:"column"`
	References ForeignKeyReference `json:"references"`
	Up         string              `json:"up"`
	Down       string              `json:"down"`
}

type OpSetNotNull struct {
	Table  string `json:"table"`
	Column string `json:"column"`
	Up     string `json:"up"`
	Down   string `json:"down"`
}

type OpSetReplicaIdentity struct {
	// Replica identity to set
	Identity ReplicaIdentity `json:"identity"`

	// Name of the table
	Table string `json:"table"`
}

type OpSetUnique struct {
	Name   string `json:"name"`
	Table  string `json:"table"`
	Column string `json:"column"`
	Up     string `json:"up"`
	Down   string `json:"down"`
}

type Operation interface {
	// Start will apply the required changes to enable supporting the new schema
	// version in the database (through a view)
	// update the given views to expose the new schema version
	Start(ctx context.Context, conn *sql.DB, stateSchema string, s *schema.Schema, cbs ...CallbackFn) error

	// Complete will update the database schema to match the current version
	// after calling Start.
	// This method should be called once the previous version is no longer used
	Complete(ctx context.Context, conn *sql.DB) error

	// Rollback will revert the changes made by Start. It is not possible to
	// rollback a completed migration.
	Rollback(ctx context.Context, conn *sql.DB) error

	// Validate returns a descriptive error if the operation cannot be applied to the given schema
	Validate(ctx context.Context, s *schema.Schema) error
}

type Operations []Operation

type PgRollMigration struct {
	// Name of the migration
	Name string `json:"name"`

	// Operations corresponds to the JSON schema field "operations".
	Operations []interface{} `json:"operations"`
}

type ReplicaIdentity struct {
	// Name of the index to use as replica identity
	Index string `json:"index"`

	// Type of replica identity
	Type string `json:"type"`
}

type RequiresSchemaRefreshOperation interface {
	RequiresSchemaRefresh()
}

type TableAlreadyExistsError struct {
	Name string
}

type TableDoesNotExistError struct {
	Name string
}

type TriggerDirection string

type UniqueConstraint struct {
	// Name of unique constraint
	Name string `json:"name"`
}