Comment fixes related to logical decoding.
Andres Freund, per complaints by Peter Eisentraut.
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@ -33,6 +33,7 @@
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PG_MODULE_MAGIC;
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PG_MODULE_MAGIC;
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/* These must be available to pg_dlsym() */
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extern void _PG_init(void);
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extern void _PG_init(void);
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extern void _PG_output_plugin_init(OutputPluginCallbacks *cb);
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extern void _PG_output_plugin_init(OutputPluginCallbacks *cb);
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@ -43,7 +44,6 @@ typedef struct
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bool include_timestamp;
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bool include_timestamp;
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} TestDecodingData;
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} TestDecodingData;
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/* These must be available to pg_dlsym() */
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static void pg_decode_startup(LogicalDecodingContext *ctx, OutputPluginOptions *opt,
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static void pg_decode_startup(LogicalDecodingContext *ctx, OutputPluginOptions *opt,
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bool is_init);
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bool is_init);
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static void pg_decode_shutdown(LogicalDecodingContext *ctx);
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static void pg_decode_shutdown(LogicalDecodingContext *ctx);
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@ -12,14 +12,17 @@
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* together provide logical decoding, primarily by providing so
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* together provide logical decoding, primarily by providing so
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* called LogicalDecodingContexts. The goal is to encapsulate most of the
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* called LogicalDecodingContexts. The goal is to encapsulate most of the
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* internal complexity for consumers of logical decoding, so they can
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* internal complexity for consumers of logical decoding, so they can
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* create and consume a changestream with a low amount of code.
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* create and consume a changestream with a low amount of code. Builtin
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* consumers are the walsender and SQL SRF interface, but it's possible to
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* add further ones without changing core code, e.g. to consume changes in
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* a bgworker.
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*
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*
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* The idea is that a consumer provides three callbacks, one to read WAL,
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* The idea is that a consumer provides three callbacks, one to read WAL,
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* one to prepare a data write, and a final one for actually writing since
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* one to prepare a data write, and a final one for actually writing since
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* their implementation depends on the type of consumer. Check
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* their implementation depends on the type of consumer. Check
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* logicalfunc.c for an example implementations of a fairly simple consumer
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* logicalfuncs.c for an example implementation of a fairly simple consumer
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* and a implementation of a WAL reading callback that's suitable for
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* and a implementation of a WAL reading callback that's suitable for
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* simpler consumers.
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* simple consumers.
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*-------------------------------------------------------------------------
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*-------------------------------------------------------------------------
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*/
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*/
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