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feat: copy rows as INSERT/UPDATE SQL statements #271
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22ccd83
feat: copy rows as INSERT/UPDATE SQL statements from context menu
datlechin 51909d6
Merge branch 'main' into feat/copy-as-sql-statements
datlechin c3ee476
fix: handle NULL primary key value with IS NULL in WHERE clause
datlechin 3aa3f4f
fix: address PR review - backslash escaping, access control, PK guard…
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97 changes: 97 additions & 0 deletions
97
TablePro/Core/Utilities/SQL/SQLRowToStatementConverter.swift
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,97 @@ | ||
| // | ||
| // SQLRowToStatementConverter.swift | ||
| // TablePro | ||
|
|
||
| import Foundation | ||
|
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| internal struct SQLRowToStatementConverter { | ||
| internal let tableName: String | ||
| internal let columns: [String] | ||
| internal let primaryKeyColumn: String? | ||
| internal let databaseType: DatabaseType | ||
|
|
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| private static let maxRows = 50_000 | ||
|
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| internal func generateInserts(rows: [[String?]]) -> String { | ||
| let capped = rows.prefix(Self.maxRows) | ||
| let quotedTable = quoteColumn(tableName) | ||
| let quotedColumns = columns.map { quoteColumn($0) }.joined(separator: ", ") | ||
|
|
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| return capped.map { row in | ||
| let values = row.map { formatValue($0) }.joined(separator: ", ") | ||
| return "INSERT INTO \(quotedTable) (\(quotedColumns)) VALUES (\(values));" | ||
| }.joined(separator: "\n") | ||
| } | ||
|
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| internal func generateUpdates(rows: [[String?]]) -> String { | ||
| let capped = rows.prefix(Self.maxRows) | ||
|
|
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| return capped.map { row in | ||
| buildUpdateStatement(row: row) | ||
| }.joined(separator: "\n") | ||
| } | ||
|
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| // MARK: - Private Helpers | ||
|
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| private func buildUpdateStatement(row: [String?]) -> String { | ||
| let quotedTable = quoteColumn(tableName) | ||
|
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| let setClause: String | ||
| let whereClause: String | ||
|
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| if let pkColumn = primaryKeyColumn, | ||
| let pkIndex = columns.firstIndex(of: pkColumn), | ||
| row.indices.contains(pkIndex) { | ||
| let pkValue = row[pkIndex] | ||
|
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| let setClauses = columns.enumerated().compactMap { index, col -> String? in | ||
| guard col != pkColumn else { return nil } | ||
| let value = row.indices.contains(index) ? row[index] : nil | ||
| return "\(quoteColumn(col)) = \(formatValue(value))" | ||
| } | ||
| setClause = setClauses.joined(separator: ", ") | ||
| if pkValue == nil { | ||
| whereClause = "\(quoteColumn(pkColumn)) IS NULL" | ||
| } else { | ||
| whereClause = "\(quoteColumn(pkColumn)) = \(formatValue(pkValue))" | ||
| } | ||
| } else { | ||
| let allClauses = columns.enumerated().map { index, col -> String in | ||
| let value = row.indices.contains(index) ? row[index] : nil | ||
| return "\(quoteColumn(col)) = \(formatValue(value))" | ||
| } | ||
| setClause = allClauses.joined(separator: ", ") | ||
|
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| let whereParts = columns.enumerated().map { index, col -> String in | ||
| let value = row.indices.contains(index) ? row[index] : nil | ||
| if value == nil { | ||
| return "\(quoteColumn(col)) IS NULL" | ||
| } | ||
| return "\(quoteColumn(col)) = \(formatValue(value))" | ||
| } | ||
| whereClause = whereParts.joined(separator: " AND ") | ||
| } | ||
|
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| switch databaseType { | ||
| case .clickhouse: | ||
| return "ALTER TABLE \(quotedTable) UPDATE \(setClause) WHERE \(whereClause);" | ||
| default: | ||
| return "UPDATE \(quotedTable) SET \(setClause) WHERE \(whereClause);" | ||
| } | ||
| } | ||
|
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| private func formatValue(_ value: String?) -> String { | ||
| guard let value else { | ||
| return "NULL" | ||
| } | ||
| var escaped = value.replacingOccurrences(of: "'", with: "''") | ||
| if databaseType == .mysql || databaseType == .mariadb { | ||
| escaped = escaped.replacingOccurrences(of: "\\", with: "\\\\") | ||
| } | ||
| return "'\(escaped)'" | ||
| } | ||
|
|
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| private func quoteColumn(_ name: String) -> String { | ||
| databaseType.quoteIdentifier(name) | ||
| } | ||
| } | ||
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