zeus
43 lines
1.1 KiB
Swift
43 lines
1.1 KiB
Swift
struct SQLIndexGenerator {
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let name: String
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let table: String
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let expressions: [SQLExpression]
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let options: IndexOptions
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let condition: SQLExpression?
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func sql(_ db: Database) throws -> String {
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var sql: SQL = "CREATE"
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if options.contains(.unique) {
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sql += " UNIQUE"
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}
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sql += " INDEX"
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if options.contains(.ifNotExists) {
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sql += " IF NOT EXISTS"
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}
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sql += " \(identifier: name) ON \(identifier: table)("
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sql += expressions.map { SQL($0) }.joined(separator: ", ")
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sql += ")"
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if let condition {
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sql += " WHERE \(condition)"
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}
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let context = SQLGenerationContext(db, argumentsSink: .literalValues)
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return try sql.sql(context)
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}
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}
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extension SQLIndexGenerator {
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init(index: IndexDefinition) {
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name = index.name
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table = index.table
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expressions = index.expressions
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options = index.options
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condition = index.condition
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}
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}
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