我们可以使用Snowflake元数据表SYS.DATABASES和SYS.TABLES来在Snowflake中完成此任务。以下是此任务的代码示例:
CREATE OR REPLACE PROCEDURE LIST_TABLES_WITH_EMPTY_ROW() RETURNS VARCHAR LANGUAGE JAVASCRIPT AS $$ var DATABASE_NAMES = []; var TABLE_NAMES = []; var EMPTY_ROWS = []; var ROW_COUNT;
// Get list of database names
var GET_DATABASE_NAMES = snowflake.createStatement({sqlText: SELECT "NAME" FROM "ACCOUNT_USAGE"."DATABASES"
}).execute();
while (GET_DATABASE_NAMES.next()) {
DATABASE_NAMES.push(GET_DATABASE_NAMES.getColumnValue('NAME'));
}
// Loop over each database and table and check for empty rows
for (var i=0; i
var GET_ROW_COUNT = snowflake.createStatement({sqlText: `SELECT COUNT(*) FROM "${DATABASE_NAMES[i]}"."${GET_TABLE_NAMES.getColumnValue('SCHEMA_NAME')}"."${GET_TABLE_NAMES.getColumnValue('NAME')}"`}).execute();
ROW_COUNT = GET_ROW_COUNT.next();
if (ROW_COUNT === 0) {
EMPTY_ROWS.push({"database_name": DATABASE_NAMES[i], "schema_name": GET_TABLE_NAMES.getColumnValue('SCHEMA_NAME'), "table_name": GET_TABLE_NAMES.getColumnValue('NAME')});
}
}
}
// Output results
if (EMPTY_ROWS.length > 0) {
return Tables with empty rows: ${JSON.stringify(EMPTY_ROWS)}
;
} else {
return No tables with empty rows found.
;
}
$$;
在Snowflake中执行这个存储过程后,它将输出所有具有空行的表的名称。