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TestCommon: Add DatabricksSchemaManager extensions (#326)
* Bump Microsoft.Identity (it was vulnerable) * Release notes and version * InsertFromCsvFileAsync * Bump NuGet packages * Bump Azurite version * Update source/TestCommon/source/FunctionApp.TestCommon/Databricks/DatabricksSchemaManagerExtensions.cs Co-authored-by: Ebbe Knudsen <xedkn@energinet.dk> * Update source/TestCommon/source/FunctionApp.TestCommon/Databricks/DatabricksSchemaManagerExtensions.cs Co-authored-by: Ebbe Knudsen <xedkn@energinet.dk> * Update source/TestCommon/source/FunctionApp.TestCommon/Databricks/DatabricksSchemaManagerExtensions.cs Co-authored-by: Ebbe Knudsen <xedkn@energinet.dk> * Update source/TestCommon/source/FunctionApp.TestCommon/Databricks/DatabricksSchemaManagerExtensions.cs Co-authored-by: Ebbe Knudsen <xedkn@energinet.dk> * Rename --------- Co-authored-by: Ebbe Knudsen <xedkn@energinet.dk>
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.../TestCommon/source/FunctionApp.TestCommon/Databricks/DatabricksSchemaManagerExtensions.cs
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| // Copyright 2020 Energinet DataHub A/S | ||
| // | ||
| // Licensed under the Apache License, Version 2.0 (the "License2"); | ||
| // you may not use this file except in compliance with the License. | ||
| // You may obtain a copy of the License at | ||
| // | ||
| // http://www.apache.org/licenses/LICENSE-2.0 | ||
| // | ||
| // Unless required by applicable law or agreed to in writing, software | ||
| // distributed under the License is distributed on an "AS IS" BASIS, | ||
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| // See the License for the specific language governing permissions and | ||
| // limitations under the License. | ||
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| using System.Globalization; | ||
| using CsvHelper; | ||
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| namespace Energinet.DataHub.Core.FunctionApp.TestCommon.Databricks; | ||
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| public static class DatabricksSchemaManagerExtensions | ||
| { | ||
| public const string DeltaTableArrayOfStrings = "ARRAY<STRING>"; | ||
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| /// <summary> | ||
| /// Expects a CSV file which was exported from Databricks. | ||
| /// The header must contain the column names and each row must contain the delta table values per column. | ||
| /// Delta table arrays must be parsed differently, but otherwise all values can be parsed from the CSV into strings. | ||
| /// All parsed rows are then inserted into a delta table. | ||
| /// </summary> | ||
| public static async Task InsertFromCsvFileAsync( | ||
| this DatabricksSchemaManager schemaManager, | ||
| string tableName, | ||
| Dictionary<string, (string DataType, bool IsNullable)> columnDefinitions, | ||
| string csvFilePath) | ||
| { | ||
| using (var streamReader = new StreamReader(csvFilePath)) | ||
| using (var csvReader = new CsvReader(streamReader, CultureInfo.InvariantCulture)) | ||
| { | ||
| await csvReader.ReadAsync().ConfigureAwait(false); | ||
| csvReader.ReadHeader(); | ||
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| if (csvReader.HeaderRecord == null) | ||
| throw new InvalidOperationException("First row of CSV file must contain header information."); | ||
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| var rows = new List<string[]>(); | ||
| while (await csvReader.ReadAsync().ConfigureAwait(false)) | ||
| { | ||
| var row = new string[csvReader.HeaderRecord.Length]; | ||
| for (var columnIndex = 0; columnIndex < csvReader.ColumnCount; columnIndex++) | ||
| { | ||
| row[columnIndex] = ParseColumnValue(columnDefinitions, csvReader, columnIndex); | ||
| } | ||
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| rows.Add(row); | ||
| } | ||
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| await schemaManager.InsertAsync(tableName, csvReader.HeaderRecord, rows).ConfigureAwait(false); | ||
| } | ||
| } | ||
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| /// <summary> | ||
| /// Parse CSV column value into a delta table "insertable" value. | ||
| /// Only arrays require special handling; all other values can be inserted as "strings". | ||
| /// </summary> | ||
| private static string ParseColumnValue( | ||
| Dictionary<string, (string DataType, bool IsNullable)> columnDefinitions, | ||
| CsvReader csvReader, | ||
| int columnIndex) | ||
| { | ||
| var columnName = csvReader.HeaderRecord![columnIndex]; | ||
| var columnValue = csvReader.GetField(columnIndex); | ||
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| if (columnDefinitions[columnName].IsNullable && columnValue == string.Empty) | ||
| { | ||
| return "NULL"; | ||
| } | ||
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| if (columnDefinitions[columnName].DataType == DeltaTableArrayOfStrings) | ||
| { | ||
| var arrayContent = columnValue! | ||
| .Replace('[', '(') | ||
| .Replace(']', ')'); | ||
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| return $"Array{arrayContent}"; | ||
| } | ||
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| return $"'{columnValue}'"; | ||
| } | ||
| } |
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