package liquibase.sqlgenerator.core;
import liquibase.CatalogAndSchema;
import liquibase.database.Database;
import liquibase.database.core.MSSQLDatabase;
import liquibase.database.core.MySQLDatabase;
import liquibase.structure.core.View;
import liquibase.exception.ValidationErrors;
import liquibase.sql.Sql;
import liquibase.sql.UnparsedSql;
import liquibase.sqlgenerator.SqlGeneratorChain;
import liquibase.statement.core.GetViewDefinitionStatement;
public class GetViewDefinitionGenerator extends AbstractSqlGenerator<GetViewDefinitionStatement> {
@Override
public ValidationErrors validate(GetViewDefinitionStatement getViewDefinitionStatement, Database database, SqlGeneratorChain sqlGeneratorChain) {
ValidationErrors validationErrors = new ValidationErrors();
validationErrors.checkRequiredField("viewName", getViewDefinitionStatement.getViewName());
return validationErrors;
}
@Override
public Sql[] generateSql(GetViewDefinitionStatement statement, Database database, SqlGeneratorChain sqlGeneratorChain) {
CatalogAndSchema schema = new CatalogAndSchema(statement.getCatalogName(), statement.getSchemaName()).customize(database);
String sql;
if (database instanceof MSSQLDatabase)
sql = "select VIEW_DEFINITION from INFORMATION_SCHEMA.VIEWS where TABLE_NAME='" + database.correctObjectName(statement.getViewName(), View.class) + "'";
else
sql = "select view_definition from information_schema.views where table_name='" + database.correctObjectName(statement.getViewName(), View.class) + "'";
if (database instanceof MySQLDatabase) {
sql += " and table_schema='" + schema.getCatalogName() + "'";
} else {
if (database.supportsSchemas()) {
String schemaName = schema.getSchemaName();
if (schemaName != null) {
if (database instanceof MSSQLDatabase)
sql += " and TABLE_SCHEMA='" + schemaName + "'";
else
sql += " and table_schema='" + schemaName + "'";
}
}
if (database.supportsCatalogs()) {
String catalogName = schema.getCatalogName();
if (catalogName != null) {
if (database instanceof MSSQLDatabase)
sql += " and TABLE_CATALOG='" + catalogName + "'";
else
sql += " and table_catalog='" + catalogName + "'";
}
}
}
return new Sql[]{
new UnparsedSql(sql)
};
}
}