Issue in Fabric when loading data into notebook with different column width

Hi davidding 

Here is an example I got from Chat GTP explaining how to handle columns of different sizes. The code below is from Chat GTP

from pyspark.sql.functions import lit

def read_and_align_csv(file_path, base_schema=None):
    # Read the CSV file
    df = spark.read.csv(file_path, header=True, inferSchema=True)
    
    if base_schema is not None:
        # Get the columns that are in the base schema but not in the current DataFrame
        for col in base_schema:
            if col not in df.columns:
                # Add the missing column with null values
                df = df.withColumn(col, lit(None).cast(base_schema[col]))
        
        # Get the columns that are in the current DataFrame but not in the base schema
        for col in df.columns:
            if col not in base_schema:
                # Add the column to the base schema with null values
                base_schema[col] = df.schema[col].dataType

    else:
        # Initialize base schema if it's the first DataFrame
        base_schema = {col: df.schema[col].dataType for col in df.columns}

    return df, base_schema

# List of CSV file paths
csv_files = ["path/to/csv1.csv", "path/to/csv2.csv", "path/to/csv3.csv"]

# Initialize base schema
base_schema = None
dataframes = []

# Read and align each CSV file
for file_path in csv_files:
    df, base_schema = read_and_align_csv(file_path, base_schema)
    dataframes.append(df)

# Combine all DataFrames
combined_df = dataframes[0]
for df in dataframes[1:]:
    combined_df = combined_df.unionByName(df)

# Show combined DataFrame
combined_df.show()