48 lines
1.3 KiB
Crystal
48 lines
1.3 KiB
Crystal
module DB
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# When a statement is to be executed in a DB that has a connection pool
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# a statement from the DB needs to be able to represent a statement in any
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# of the connections of the pool. Otherwise the user will need to deal with
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# actual connections in some point.
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abstract struct PoolStatement
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include StatementMethods
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def initialize(@db : Database, @query : String)
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end
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# See `QueryMethods#exec`
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def exec : ExecResult
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statement_with_retry &.exec
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end
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# See `QueryMethods#exec`
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def exec(*args_, args : Array? = nil) : ExecResult
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statement_with_retry &.exec(*args_, args: args)
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end
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# See `QueryMethods#query`
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def query : ResultSet
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statement_with_retry &.query
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end
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# See `QueryMethods#query`
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def query(*args_, args : Array? = nil) : ResultSet
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statement_with_retry &.query(*args_, args: args)
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end
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# See `QueryMethods#scalar`
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def scalar(*args_, args : Array? = nil)
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statement_with_retry &.scalar(*args_, args: args)
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end
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# builds a statement over a real connection
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# the conneciton is registered in `@connections`
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private abstract def build_statement : Statement
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private def statement_with_retry
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@db.retry do
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return yield build_statement
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end
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end
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end
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end
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