During my most recent expedition of going through PostgreSQL source code, I ran into some mysterious variables in the page structure of some indexes. I will explain later why i am calling these mysterious but first have a look at these variables… typedef struct HashPageOpaqueData{ … uint16 hasho_page_id; /* for identification of hash indexes */}…
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pg_bulkload is a high-speed data loading tool for PostgreSQL, compared with the copy command. The biggest advantage is speed. In the direct mode of pg_bulkload, it will skip shared buffer and WAL buffer, writing files directly. It also includes the data recovery function to recover in case of import failure. GitHub: https://github.com/ossc-db/pg_bulkload pg_bulkload mainly…
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In computing, a hash table (hash map) is a data structure that implements an associative array abstract data type, a structure that can map keys to values. A hash table uses a hash function to compute an index, also called a hash code, into an array of buckets or slots, from which the desired value…
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