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#include "updateDatabase.h"
#include "pqConn.h"
#include "typeMapper.h"
#include <compileTimeFormatter.h>
#include <cstdint>
#include <dbRecordSet.h>
#include <eventSourceBase.h>
#include <helpers.h>
#include <input/mysqlConn.h>
#include <input/mysqlRecordSet.h>
#include <input/replStream.h>
#include <input/sql/selectColumns.h>
#include <input/sql/showMasterStatus.h>
#include <memory>
#include <output/pq/sql/insertColumn.h>
#include <output/pq/sql/insertSource.h>
#include <output/pq/sql/insertTable.h>
#include <output/pq/sql/selectColumns.h>
#include <output/pq/sql/selectSource.h>
#include <output/pq/sql/selectSourceSchema.h>
#include <output/pq/sql/selectTables.h>
#include <stdexcept>
#include <streamSupport.h>
namespace MyGrate::Output::Pq {
ColumnDef::ColumnDef(std::string n, std::size_t o, bool p) : name {std::move(n)}, ordinal(o), is_pk(p) { }
UpdateDatabase::UpdateDatabase(const char * const str, uint64_t s) :
PqConn {str}, source {s}, schema(**output::pq::sql::selectSourceSchema::execute(this, s))
{
auto trecs = output::pq::sql::selectTables::execute(this, source);
auto crecs = output::pq::sql::selectColumns::execute(this, source);
for (auto t {0U}; t < trecs->rows(); t++) {
tables.emplace(trecs->at(t, 0), std::make_unique<TableDef>(*crecs, trecs->at(t, 0)));
}
}
EventSourceBasePtr
UpdateDatabase::getSource()
{
auto srcrec = output::pq::sql::selectSource::execute(this, source);
verify<ConfigError>(srcrec->rows() == 1, "Wrong number of source config rows");
return (*srcrec)[0].create<Input::ReplicationStream, 7>();
}
TableDef::TableDef(const RecordSet & crecs, std::string_view name)
{
for (auto c {0U}; c < crecs.rows(); c++) {
if (crecs.at(c, 0) == name) {
columns.emplace_back(crecs[c].create<ColumnDef, 3, 1>());
}
}
}
UpdateDatabase
UpdateDatabase::createNew(PqConn * pq, const char * host, const char * username, const char * password,
unsigned short port, const char * db, int sid, const char * schema)
{
Input::MySQLConn my {host, username, password, port};
auto ms = input::sql::showMasterStatus::execute(&my);
auto source_id = Tx {pq}([&]() {
pq->query(scprintf<"CREATE SCHEMA IF NOT EXISTS %?">(schema).c_str());
return **output::pq::sql::insertSource::execute(
pq, host, username, password, port, db, ms->at(0, 0), ms->at(0, 1), sid, schema);
});
return UpdateDatabase(pq->connstr.c_str(), source_id);
}
void
UpdateDatabase::addTable(Input::MySQLConn * conn, const char * tableName)
{
auto cols = input::sql::selectColumns::execute(conn, tableName);
verify<std::logic_error>(cols->rows() > 0, "Table has no rows");
auto tableDef {std::make_unique<TableDef>()};
Tx {this}([&] {
const auto table_id = **output::pq::sql::insertTable::execute(this, tableName, source);
std::stringstream ct;
scprintf<"CREATE TABLE %?.%?(">(ct, schema, tableName);
TypeMapper tm;
for (auto col : *cols) {
output::pq::sql::insertColumn::execute(this, col[0], col.currentRow(), table_id);
if (col.currentRow()) {
ct << ',';
}
scprintf<"%? %?">(ct, col[0], tm.map(col[2], scprintf<"%?.%?">(tableName, col[0])));
if (!col[1]) {
ct << " not null";
}
if (col[3]) {
ct << " primary key";
}
tableDef->columns.push_back(std::make_unique<ColumnDef>(col[0], tableDef->columns.size() + 1, col[3]));
}
ct << ")";
this->query(ct.str().c_str());
});
tables.emplace(tableName, std::move(tableDef));
}
struct WritePqCopyStream {
explicit WritePqCopyStream(FILE * o) : out {o} { }
WritePqCopyStream(const WritePqCopyStream &) = delete;
WritePqCopyStream(WritePqCopyStream &&) = delete;
WritePqCopyStream & operator=(const WritePqCopyStream &) = delete;
WritePqCopyStream & operator=(WritePqCopyStream &&) = delete;
~WritePqCopyStream()
{
fputc('\n', out);
}
void
nextField()
{
fputc('\t', out);
}
void operator()(std::nullptr_t) const
{
fputs("\\N", out);
}
#define BASIC_PRINT(T, fmt) \
void operator()(T v) const \
{ \
fprintf(out, fmt, v); \
}
BASIC_PRINT(double, "%f")
BASIC_PRINT(float, "%f")
BASIC_PRINT(int8_t, "%hhd")
BASIC_PRINT(uint8_t, "%hhu")
BASIC_PRINT(int16_t, "%hd")
BASIC_PRINT(uint16_t, "%hu")
BASIC_PRINT(int32_t, "%d")
BASIC_PRINT(uint32_t, "%u")
BASIC_PRINT(int64_t, "%ld")
BASIC_PRINT(uint64_t, "%lu")
#undef BASIC_PRINT
void operator()(timespec) const
{
throw std::logic_error("timespec not implemented");
}
void
operator()(Date v) const
{
fprintf(out, "%d-%d-%d", v.year, v.month, v.day);
}
void
operator()(Time v) const
{
fprintf(out, "%d:%d:%d", v.hour, v.minute, v.second);
}
void
operator()(DateTime v) const
{
operator()(static_cast<Date &>(v));
fputc('T', out);
operator()(static_cast<Time &>(v));
}
void
operator()(std::string_view v) const
{
auto pos {v.begin()};
while (pos != v.end()) {
auto esc = std::find_if(pos, v.end(), [](unsigned char c) {
return std::iscntrl(c);
});
if (esc != pos) {
fwrite(pos, esc - pos, 1, out);
pos = esc;
}
while (pos != v.end()) {
fprintf(out, "\\%03o", *pos);
pos++;
}
}
}
void operator()(BitSet) const
{
throw std::logic_error("bitset not implemented");
}
void
operator()(Blob v) const
{
fputs("\\\\x", out);
std::for_each(v.begin(), v.end(), [this](auto b) {
fprintf(out, "%02hhx", (uint8_t)b);
});
}
FILE * out;
};
void
UpdateDatabase::copyTableContent(Input::MySQLConn * conn, const char * table)
{
auto out = beginBulkUpload(schema.c_str(), table);
auto sourceSelect = [this](auto table) {
std::stringstream sf;
unsigned int ordinal {0};
for (const auto & col : tables.at(table)->columns) {
scprintf<"%? %?">(sf, !ordinal++ ? "SELECT " : ", ", col->name);
}
sf << " FROM " << table;
return sf.str();
};
auto stmt {conn->prepare(sourceSelect(table).c_str(), 0)};
stmt->execute({});
auto sourceCursor {stmt->cursor()};
const auto cols = sourceCursor->columns();
while (sourceCursor->fetch()) {
WritePqCopyStream cs {out};
for (auto ordinal {0U}; ordinal < cols; ordinal += 1) {
if (ordinal) {
cs.nextField();
}
sourceCursor->at(ordinal).visit(cs);
}
}
fclose(out);
}
}
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