org.evomaster.client.java.sql.internal

Class SqlNameContext

java.lang.Object

org.evomaster.client.java.sql.internal.SqlNameContext

public class SqlNameContext
extends Object

Given a column, we need to determinate to which table it belongs to. This is not always simple, as SQL queries can use "aliases".

This problem is further exacerbated by: 1) a SELECT can have many sub-SELECTs inside it, each one defining their own independent aliases 2) a SQL command might not have all the necessary info to infer the right table for a column. In those (valid) cases of ambiguity, we must refer to the schema. WARNING: we lowercase all names of tables and columns, as SQL is (should be?) case insensitive

Field Summary

Fields

Modifier and Type	Field and Description
static String	UNNAMED_TABLE

Constructor Summary

Constructors

Constructor and Description
SqlNameContext(net.sf.jsqlparser.statement.Statement statement) WARNING: should only be used in tests, to avoid each time having to provide a schema for the test data

Method Summary

Modifier and Type	Method and Description
String	getTableName(net.sf.jsqlparser.schema.Column column)
boolean	hasColumn(String tableName, String columnName) Check if table contains a column with the given name.
void	setSchema(DbInfoDto schema)

Methods inherited from class java.lang.Object

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

Field Detail

UNNAMED_TABLE

public static final String UNNAMED_TABLE

See Also:

Constant Field Values

Constructor Detail

SqlNameContext

public SqlNameContext(net.sf.jsqlparser.statement.Statement statement)

WARNING: should only be used in tests, to avoid each time having to provide a schema for the test data

Parameters:

statement - to create context for

Method Detail

setSchema

public void setSchema(DbInfoDto schema)

hasColumn

public boolean hasColumn(String tableName,
                         String columnName)

Check if table contains a column with the given name. This is based on the DB schema. If no schema is defined, this method returns false.

getTableName

public String getTableName(net.sf.jsqlparser.schema.Column column)

Parameters:

column - a column object

Returns:

the name of the table that this column belongs to