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add and amend comments for clarity
include/my_base.h: amend comment for clarity sql/ha_federated.cc: add comment
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2 changed files with 6 additions and 3 deletions
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@ -170,9 +170,8 @@ enum ha_extra_function {
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HA_EXTRA_DELETE_CANNOT_BATCH,
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HA_EXTRA_UPDATE_CANNOT_BATCH,
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/*
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Inform handler that write_row() should immediately report constraint
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violations because a INSERT...ON DUPLICATE KEY UPDATE is in being
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performed.
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Inform handler that an "INSERT...ON DUPLICATE KEY UPDATE" will be
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executed. This condition is unset by HA_EXTRA_NO_IGNORE_DUP_KEY.
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*/
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HA_EXTRA_INSERT_WITH_UPDATE
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};
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@ -2555,6 +2555,10 @@ int ha_federated::extra(ha_extra_function operation)
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replace_duplicates= TRUE;
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break;
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case HA_EXTRA_WRITE_CANNOT_REPLACE:
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/*
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We use this flag to ensure that we do not create an "INSERT IGNORE"
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statement when inserting new rows into the remote table.
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*/
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replace_duplicates= FALSE;
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break;
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case HA_EXTRA_INSERT_WITH_UPDATE:
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