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This is the counterpart of the annotations we did in the last few commits. It extracts queries, passes them through a driver-specific query rewriter and dumps them into a driver-specific query-list, along with some metadata to facilitate processing later on. The generated query list is then registered as a `db_config` and will be loaded by the driver upon instantiation. Signed-off-by: Christian Decker <decker.christian@gmail.com>
57 lines
1.1 KiB
C
57 lines
1.1 KiB
C
#ifndef LIGHTNING_WALLET_DB_COMMON_H
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#define LIGHTNING_WALLET_DB_COMMON_H
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#include "config.h"
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#include <ccan/autodata/autodata.h>
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#include <ccan/short_types/short_types.h>
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struct db_query {
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const char *name;
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const char *query;
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/* How many placeholders are in the query (and how many will we have
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to allocate when instantiating this query)? */
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size_t placeholders;
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};
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struct db_config {
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const char *name;
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struct db_query *queries;
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size_t num_queries;
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};
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enum db_binding_type {
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DB_BINDING_UNINITIALIZED = 0,
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DB_BINDING_NULL,
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DB_BINDING_BLOB,
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DB_BINDING_TEXT,
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DB_BINDING_UINT64,
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DB_BINDING_INT,
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};
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struct db_binding {
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enum db_binding_type type;
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union {
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int i;
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u64 u64;
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const char* text;
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const u8 *blob;
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} v;
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size_t len;
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};
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struct db_stmt {
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/* Which SQL statement are we trying to execute? */
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struct db_query *query;
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/* Which parameters are we binding to the statement? */
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struct db_binding *bindings;
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/* Where are we calling this statement from? */
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const char *location;
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};
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/* Provide a way for DB backends to register themselves */
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AUTODATA_TYPE(db_backends, struct db_config);
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#endif /* LIGHTNING_WALLET_DB_COMMON_H */
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