To check if a column exists in a PySpark DataFrame in a case-insensitive manner, convert both the column name and the DataFrame’s column names to a consistent case (e.g., uppercase) before comparing. Use the following approach:# Case insensitive column_to_check = "column_name" exists =...
另一个数据框架在其中一个列(例如col2)中包含城市/城镇/郊区的名称。
To check if a column exists in a PySpark DataFrame, use the ‘contains()’ method on the DataFrame’s ‘columns’ attribute. For example, ‘if “column_name” in df.columns’ checks if the column exists in DataFrame ‘df’. Alternatively, you can use ‘selectExpr()’ with the column na...
append:即通过指定一个递增的列,如:–incremental append --check-column num_iid --last-value 0 incremental: 时间戳,比如: --incremental lastmodified \ --check-column column \ --merge-key key \ --last-value '2012-02-01 11:0:00' 1. 2. 3. 4. 就是只导入check-column的列比’2012-02-01...
it can read the underlying existing schema if existsinfer_schema="False"#You can toggle this option to True or False depending on whether you have header in your file or notfirst_row_is_header="True"# This is the delimiter that is in your data filedelimiter="|"# Bringing all the option...
DROPTABLEIFEXISTS`job`;CREATETABLE`job` ( `id`int(10)NOTNULLAUTO_INCREMENT, `database_name`varchar(50)DEFAULTNULL,--数据库名称`table_name`varchar(100)DEFAULTNULL,--需要增量导入的表名`partition_column_name`varchar(100)DEFAULTNULL,--分区的字段名(这里只考虑对一个字段分区,如果多个字段这里应该使...
问pyspark.sql.utils.ParseException:不匹配的输入'#‘期待{<EOF>ENpublic class brackets { /*算...
CREATE TABLE [IF NOT EXISTS] [db.]table_name [ON CLUSTER cluster] ( name1 [type1] [DEFAULT|MATERIALIZED|ALIAS expr1], name2 [type2] [DEFAULT|MATERIALIZED|ALIAS expr2], ... ) ENGINE [=] SummingMergeTree(date-column [, sampling_expression], (primary, key), index_granularity, [columns...
DataFrameWriter - 5from sqlglot.dataframe.sql.session import SparkSession - 6from sqlglot.dataframe.sql.window import Window, WindowSpec - 7 - 8__all__ = [ - 9 "SparkSession", -10 "DataFrame", -11 "GroupedData", -12 "Column", -13 "DataFrameNaFunctions", -14 "Window", -15 "Windo...
COLUMN_STATS_ACCURATE false EXTERNAL FALSE numFiles 1 numRows -1 rawDataSize -1 spark.sql.sources.provider orc spark.sql.sources.schema.numParts 1 spark.sql.sources.schema.part.0 {\"type\":\"struct\",\"fields\":[{\"name\":\"country\",\"type\":\"string\",\"nullable\":true,\"me...