creating join statement object
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@ -77,8 +77,8 @@ struct SelectStatement : Statement {
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struct JoinStatement : Statement {
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JoinStatement() : Statement(kStmtJoin) {};
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TableRef* table1;
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TableRef* table2;
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TableRef* left;
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TableRef* right;
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JoinType join_type;
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Expr* join_condition;
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};
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@ -80,8 +80,16 @@ void printSelectStatementInfo(SelectStatement* stmt, uint num_indent) {
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inprint("Limit:", num_indent+1);
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inprint(stmt->limit->limit, num_indent+2);
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}
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}
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void printJoinStatementInfo(JoinStatement* stmt, uint num_indent) {
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inprint("JoinStatement", num_indent);
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inprint("Left Table", num_indent+1);
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printTableRefInfo(stmt->left, num_indent+2);
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inprint("Right Table", num_indent+1);
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printTableRefInfo(stmt->right, num_indent+2);
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inprint("Join Condition", num_indent+1);
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printExpression(stmt->join_condition, num_indent+2);
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}
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} // namespace hsql
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@ -8,6 +8,7 @@
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namespace hsql {
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void printSelectStatementInfo(SelectStatement* stmt, uint num_indent);
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void printJoinStatementInfo(JoinStatement* stmt, uint num_indent);
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} // namespace hsql
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@ -111,7 +111,7 @@ typedef void* yyscan_t;
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%type <table> from_clause table_ref table_ref_atomic table_ref_atomic_opt_paren
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%type <expr> expr scalar_expr unary_expr binary_expr function_expr star_expr
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%type <expr> column_name literal int_literal num_literal
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%type <expr> comp_expr where_clause
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%type <expr> comp_expr where_clause join_condition
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%type <explist> expr_list group_clause select_list
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%type <tbllist> table_ref_commalist
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%type <order> order_by_clause
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@ -171,6 +171,10 @@ join_statement:
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table_ref_atomic_opt_paren JOIN table_ref_atomic_opt_paren ON join_condition
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{
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$$ = new JoinStatement();
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$$->left = $1;
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$$->right = $3;
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$$->join_condition = $5;
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$$->join_type = kJoinInner;
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}
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;
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@ -25,8 +25,10 @@ int main(int argc, char *argv[]) {
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if (stmt->type == kStmtSelect) {
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printSelectStatementInfo((SelectStatement*) stmt, 0);
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} else if (stmt->type == kStmtJoin) {
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printJoinStatementInfo((JoinStatement*) stmt, 0);
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} else {
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fprintf(stderr, "Only Supporting Select Statements!\n");
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fprintf(stderr, "Unsupported Statement Type %u!\n", stmt->type);
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}
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}
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