package liquibase.sqlgenerator.core;
import liquibase.CatalogAndSchema;
import liquibase.database.Database;
import liquibase.database.core.OracleDatabase;
import liquibase.exception.ValidationErrors;
import liquibase.sql.Sql;
import liquibase.sql.UnparsedSql;
import liquibase.sqlgenerator.SqlGeneratorChain;
import liquibase.statement.core.FindForeignKeyConstraintsStatement;
public class FindForeignKeyConstraintsGeneratorOracle extends AbstractSqlGenerator<FindForeignKeyConstraintsStatement> {
@Override
public int getPriority() {
return PRIORITY_DATABASE;
}
@Override
public boolean supports(FindForeignKeyConstraintsStatement statement, Database database) {
return database instanceof OracleDatabase;
}
@Override
public ValidationErrors validate(FindForeignKeyConstraintsStatement findForeignKeyConstraintsStatement, Database database, SqlGeneratorChain sqlGeneratorChain) {
ValidationErrors validationErrors = new ValidationErrors();
validationErrors.checkRequiredField("baseTableName", findForeignKeyConstraintsStatement.getBaseTableName());
return validationErrors;
}
@Override
public Sql[] generateSql(FindForeignKeyConstraintsStatement statement, Database database, SqlGeneratorChain sqlGeneratorChain) {
CatalogAndSchema baseTableSchema = new CatalogAndSchema(statement.getBaseTableCatalogName(), statement.getBaseTableSchemaName()).customize(database);
StringBuilder sb = new StringBuilder();
sb.append("SELECT ");
sb.append("BASE.TABLE_NAME as ").append(FindForeignKeyConstraintsStatement.RESULT_COLUMN_BASE_TABLE_NAME).append(", ");
sb.append("BCOLS.COLUMN_NAME as ").append(FindForeignKeyConstraintsStatement.RESULT_COLUMN_BASE_TABLE_COLUMN_NAME).append(", ");
sb.append("FRGN.TABLE_NAME ").append(FindForeignKeyConstraintsStatement.RESULT_COLUMN_FOREIGN_TABLE_NAME).append(", ");
sb.append("FCOLS.COLUMN_NAME as ").append(FindForeignKeyConstraintsStatement.RESULT_COLUMN_FOREIGN_COLUMN_NAME).append(", ");
sb.append("BASE.CONSTRAINT_NAME as ").append(FindForeignKeyConstraintsStatement.RESULT_COLUMN_CONSTRAINT_NAME).append(" ");
sb.append("FROM ALL_CONSTRAINTS BASE,");
sb.append(" ALL_CONSTRAINTS FRGN,");
sb.append(" ALL_CONS_COLUMNS BCOLS,");
sb.append(" ALL_CONS_COLUMNS FCOLS ");
sb.append("WHERE BASE.R_OWNER = FRGN.OWNER ");
sb.append("AND BASE.R_CONSTRAINT_NAME = FRGN.CONSTRAINT_NAME ");
sb.append("AND BASE.OWNER = BCOLS.OWNER ");
sb.append("AND BASE.CONSTRAINT_NAME = BCOLS.CONSTRAINT_NAME ");
sb.append("AND FRGN.OWNER = FCOLS.OWNER ");
sb.append("AND FRGN.CONSTRAINT_NAME = FCOLS.CONSTRAINT_NAME ");
sb.append("AND BASE.TABLE_NAME = '").append(statement.getBaseTableName().toUpperCase()).append("' ");
sb.append("AND BASE.CONSTRAINT_TYPE = 'R' ");
sb.append("AND BASE.OWNER = '").append(baseTableSchema.getSchemaName()).append("'");
return new Sql[]{
new UnparsedSql(sb.toString())
};
}
}