51 lines
1.5 KiB
C
51 lines
1.5 KiB
C
#include "duckdb.h"
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#include <stdio.h>
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int main() {
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duckdb_database db = NULL;
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duckdb_connection con = NULL;
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duckdb_result result;
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if (duckdb_open(NULL, &db) == DuckDBError) {
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fprintf(stderr, "Failed to open database\n");
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goto cleanup;
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}
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if (duckdb_connect(db, &con) == DuckDBError) {
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fprintf(stderr, "Failed to open connection\n");
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goto cleanup;
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}
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if (duckdb_query(con, "CREATE TABLE integers(i INTEGER, j INTEGER);", NULL) == DuckDBError) {
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fprintf(stderr, "Failed to query database\n");
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goto cleanup;
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}
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if (duckdb_query(con, "INSERT INTO integers VALUES (3, 4), (5, 6), (7, NULL);", NULL) == DuckDBError) {
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fprintf(stderr, "Failed to query database\n");
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goto cleanup;
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}
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if (duckdb_query(con, "SELECT * FROM integers", &result) == DuckDBError) {
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fprintf(stderr, "Failed to query database\n");
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goto cleanup;
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}
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// print the names of the result
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idx_t row_count = duckdb_row_count(&result);
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idx_t column_count = duckdb_column_count(&result);
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for (size_t i = 0; i < column_count; i++) {
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printf("%s ", duckdb_column_name(&result, i));
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}
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printf("\n");
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// print the data of the result
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for (size_t row_idx = 0; row_idx < row_count; row_idx++) {
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for (size_t col_idx = 0; col_idx < column_count; col_idx++) {
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char *val = duckdb_value_varchar(&result, col_idx, row_idx);
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printf("%s ", val);
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duckdb_free(val);
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}
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printf("\n");
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}
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// duckdb_print_result(result);
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cleanup:
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duckdb_destroy_result(&result);
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duckdb_disconnect(&con);
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duckdb_close(&db);
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}
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