Package dev.frostlake.functions.scalar.context

Class GetDdl

java.lang.Object

dev.frostlake.functions.BuiltInFunction

dev.frostlake.functions.scalar.context.GetDdl

public class GetDdl
extends BuiltInFunction

GET_DDL('<object_type>', '<object_name>' [, <use_fully_qualified_names>]) — reconstructs a CREATE OR REPLACE statement for an object from the catalog. Supports TABLE, VIEW, MATERIALIZED VIEW and SEQUENCE (the object types the metastore models with enough fidelity to round trip). The optional third argument is accepted for Snowflake compatibility but ignored: names are always emitted unqualified. Unsupported object types raise an error, as does an object that does not exist (the catalog lookup throws).

Constructor Summary

Constructors

Constructor	Description
GetDdl(Catalog catalog)
GetDdl(Catalog catalog, QueryRunner queryRunner)

Method Summary

Modifier and Type	Method	Description
Object	evaluate(List<Object> args)	Computes the function's result over its already-evaluated argument values.
int	getMaxArgCount()	The most arguments a call to this function may pass; Integer.MAX_VALUE marks a variadic function (see BuiltInFunction.isVariadic()).
int	getMinArgCount()	The fewest arguments a call to this function may pass; fewer is an argument-count error.

Methods inherited from class dev.frostlake.functions.BuiltInFunction

approximateRejection, binaryRejection, booleanRejection, evaluate, fileRejection, geoRejection, getName, getReturnType, isVariadic, refusesMissingArgumentsByType, semiStructuredRejection, structuredRejection, temporalRejection, temporalRejection, temporalRejection, textRejection, uuidRejection, vectorRejection

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

GetDdl

public GetDdl(Catalog catalog)

GetDdl

public GetDdl(Catalog catalog,
 QueryRunner queryRunner)

Method Details

evaluate

public Object evaluate(List<Object> args)

Description copied from class: BuiltInFunction

Computes the function's result over its already-evaluated argument values. A SQL NULL argument arrives as Java null, and returning null makes the SQL result NULL.

Specified by:

evaluate in class BuiltInFunction

Parameters:

args - the argument values, in call order

Returns:

the function's value for these arguments, or null for SQL NULL

getMinArgCount

public int getMinArgCount()

Description copied from class: BuiltInFunction

The fewest arguments a call to this function may pass; fewer is an argument-count error.

Specified by:

getMinArgCount in class BuiltInFunction

Returns:

the minimum accepted argument count

getMaxArgCount

public int getMaxArgCount()

Description copied from class: BuiltInFunction

The most arguments a call to this function may pass; Integer.MAX_VALUE marks a variadic function (see BuiltInFunction.isVariadic()).

Specified by:

getMaxArgCount in class BuiltInFunction

Returns:

the maximum accepted argument count