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optimize_cond prints the rewrites done for WHERE and HAVING:
"join_optimization": {
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"select_id": 1,
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"steps": [
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{
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"condition_processing": {
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"condition": "WHERE",
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"original_condition": "..."
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"steps": [
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{
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"transformation": "equality_propagation",
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"resulting_condition": "..."
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},
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{
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"transformation": "constant_propagation",
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"resulting_condition": "..."
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},
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{
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"transformation": "trivial_condition_removal",
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"resulting_condition": "..."
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but it doesn't print the same for ON expressions, which is misleading.
Make it print that.
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