Package com.exasol.adapter.dialects.rewriting

Class SqlGenerationHelper

java.lang.Object

com.exasol.adapter.dialects.rewriting.SqlGenerationHelper

public final class SqlGenerationHelper
extends Object

Contains functions that are helpful during SQL generation.

These functions are used by the adapters during SQL generation.

Method Summary

Modifier and Type	Method	Description
static void	addMetadata(com.exasol.adapter.sql.SqlNode node, List<com.exasol.adapter.metadata.TableMetadata> metadata)	Add metadata to the list.
static String	createColumnsDescriptionFromDataTypes(List<com.exasol.adapter.metadata.DataType> types)	Create SQL columns description for the provided list of data types.
static boolean	selectListRequiresCasts(com.exasol.adapter.sql.SqlSelectList selectList, Predicate<com.exasol.adapter.sql.SqlNode> nodeRequiresCast)	Check if selected node requires cast or not.

Methods inherited from class java.lang.Object

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

Method Detail

createColumnsDescriptionFromDataTypes

public static String createColumnsDescriptionFromDataTypes(List<com.exasol.adapter.metadata.DataType> types)

Create SQL columns description for the provided list of data types.

Parameters:

types - data types to create columns description for

Returns:

SQL columns description for types

selectListRequiresCasts

public static boolean selectListRequiresCasts(com.exasol.adapter.sql.SqlSelectList selectList,
                                              Predicate<com.exasol.adapter.sql.SqlNode> nodeRequiresCast)

Check if selected node requires cast or not.

Parameters:

selectList - SQL select list

nodeRequiresCast - node that requires cast

Returns:

true if selected node requires cast

addMetadata

public static void addMetadata(com.exasol.adapter.sql.SqlNode node,
                               List<com.exasol.adapter.metadata.TableMetadata> metadata)

Add metadata to the list.

Parameters:

node - SQL node to get metadata from

metadata - list of TableMetadata