56 lines
1.6 KiB
Go
56 lines
1.6 KiB
Go
package postgres
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import "source.gleipnir.technology/Gleipnir/jet/internal/jet"
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// TableLockMode is a type of possible SQL table lock
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type TableLockMode string
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// Lock types for LockStatement.
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const (
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LOCK_ACCESS_SHARE TableLockMode = "ACCESS SHARE"
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LOCK_ROW_SHARE TableLockMode = "ROW SHARE"
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LOCK_ROW_EXCLUSIVE TableLockMode = "ROW EXCLUSIVE"
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LOCK_SHARE_UPDATE_EXCLUSIVE TableLockMode = "SHARE UPDATE EXCLUSIVE"
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LOCK_SHARE TableLockMode = "SHARE"
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LOCK_SHARE_ROW_EXCLUSIVE TableLockMode = "SHARE ROW EXCLUSIVE"
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LOCK_EXCLUSIVE TableLockMode = "EXCLUSIVE"
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LOCK_ACCESS_EXCLUSIVE TableLockMode = "ACCESS EXCLUSIVE"
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)
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// LockStatement is interface for MySQL LOCK tables
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type LockStatement interface {
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Statement
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IN(lockMode TableLockMode) LockStatement
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NOWAIT() LockStatement
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}
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// LOCK creates LockStatement from list of tables
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func LOCK(tables ...jet.SerializerTable) LockStatement {
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newLock := &lockStatementImpl{}
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newLock.SerializerStatement = jet.NewStatementImpl(Dialect, jet.LockStatementType, newLock,
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&newLock.StatementBegin, &newLock.In, &newLock.NoWait)
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newLock.StatementBegin.Name = "LOCK TABLE"
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newLock.StatementBegin.Tables = tables
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newLock.NoWait.Name = "NOWAIT"
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return newLock
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}
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type lockStatementImpl struct {
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jet.SerializerStatement
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StatementBegin jet.ClauseStatementBegin
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In jet.ClauseIn
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NoWait jet.ClauseOptional
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}
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func (l *lockStatementImpl) IN(lockMode TableLockMode) LockStatement {
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l.In.LockMode = string(lockMode)
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return l
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}
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func (l *lockStatementImpl) NOWAIT() LockStatement {
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l.NoWait.Show = true
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return l
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}
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